Technical catalogue TK 503/01 E. ZX0.2 Gas-insulated medium voltage switchgear

Transcription

1 Technical catalogue TK 503/01 E ZX0.2 Gas-insulated medium voltage switchgear

2 Contents Page 1 Applications 4 2 Characteristics 5 3 Your benefit 6 4 Technical data Technical data of the panel Technical data of the circuit-breaker Technical data of the three position disconnector Technical data of the three position switch disconnector with HV HRC fuses HV HRC fuses 12 5 Alternative protection and control concepts of panels with circuit-breakers 14 6 Fundamental structure of the panels 15 7 Components Vacuum circuit-breaker Three position disconnector Three position switch disconnector with fuses Busbar Outer cone termination system Outer cone connectors type Kabeldon SOC from ABB Further outer cone connector systems Surge arresters Main earthing bar Capacitive voltage indicator systems Current and voltage detection devices Ring core current transformers Dimensioning of current transformers Voltage transformers Protection and control units Sulphur hexafluoride Gas system in the panels SF 6 density sensors Pressure relief systems Surfaces 47 2 Technical catalogue ZX0.2 TK Revision 01

3 Page 8 Range of panels Feeder panels Incoming and outgoing feeder panels with circuit-breaker Feeder panels with three position switch disconnector and fuses Cable termination panels Busbar sectionaliser and riser panels Couplings within a switchgear block Transfer panel Coupling (connection of two system blocks via cable) 57 9 Busbar earthing Earthing the busbar by means of an earthing set Earthing the busbar by means of a sectionaliser and riser or bus coupler Building planning Site requirements Space required Minimum aisle widths and emergency exits Minimum room heights Concrete floor Floor openings Foundation frames False floor Earthing of the switchgear Design of earthing systems with regard to touch voltage and thermal stress EMC-compliant earthing of the switchgear Recommendations on configuration of the switchgear earthing Panel weights Non-standard operating conditions 69 Technical catalogue ZX0.2 TK Revision 01 3

4 1 Applications Power supply companies Power stations Transformer substations Switching substations Industry Steel works Paper manufacture Cement industry Textiles industry Chemicals industry Foodstuffs industry Automobile industry Petrochemicals Raw materials industry Pipeline systems Foundries Rolling mills Mining Marine Platforms Drilling rigs Offshore facilities Supply vessels Ocean liners Container vessels Tankers Cable laying ships Ferries Transport Airports Harbours Railways Underground railways Services Supermarkets Shopping centres Hospitals 4 Technical catalogue ZX0.2 TK Revision 01

5 2 Characteristics Basic characteristics SF 6 gas-insulated with hermetically sealed pressure system Solid insulated busbar Rated voltages up to 24 kv Up to 2500 A and 31.5 ka Single busbar design Stainless steel encapsulation, manufactured from laser cut sheet material Modular structure Switchgear with a leakage rate of less than 0.1 % per annum Integrated leakage testing of the panels Indoor installation Wall mounting installation and free-standing installation Operator controls separate from low voltage compartment Operator controls on the panel accessible from the outside 600 mm grid dimension of panelswidth Panel variants Incoming and outgoing feeder panels as panels with circuit breaker and three position disconnector Outgoing feeder panels with three position switch disconnector and fuses Bussectionaliser panels Busriser panels Transfer panels Switching devices Vacuum circuit-breakers with series three position disconnectors Three position switch disconnectors with fuses Terminals Outer cone terminal system to EN and EN Connection facility for surge arresters on the cable connector and on the busbar Current and voltage metering Current and voltage transformers outside the gas compartments Protection and control Mechanical operation on site Combined protection and control devices Discrete protection devices with conventional control Protection against maloperation Mechanical switch interlocking with manual mechanisms between the circuit-breaker and the three position disconnector Additional electrical switch interlocks for motor-operated mechanisms Various interlocks for manual circuit-breaker operation Pressure relief Pressure relief into the switchroom Installation No gas work at site Technical catalogue ZX0.2 TK Revision 01 5

6 3 Your benefit Maximum operator safety All live components are enclosed to prevent accidental contact. As the high voltage compartments are independent of external influences (degree of protection IP65), the probability of a fault during operation is extremely low. As evidenced by arc fault testing, our switchgear systems are notable for maximum operator safety. Minimum overall costs The compact design of the panels reduces the space required and therefore the size of the station. The result is a lower investment requirement. Freedom from maintenance is achieved by constant conditions in the high voltage compartments in conjunction with the selection of suitable materials. The injurious influences of dust, vermin, moisture, oxidation and contaminated air in the high voltage compartments are precluded, as the gas-tight compartments are filled with inert gas. As a rule, therefore, isolation of the switchgear to perform maintenance work is not required. The panels only leave our production facilities after documented routine testing. Thanks to the plug-in technology applied in the areas of the busbars, cables and secondary systems, extremely short installation times are possible. No gas work is required as a rule at site. There is thus no need to evacuate and fill the high voltage compartments, test them for leakage and measure the dewpoint of the insulating gas at site. Maximum availability The busbar technology permits simple and therefore safe assembly. In spite of the extremely low failure probability of the ZX switchgear systems, replacement of components in the gas compartments and therefore a rapid return to service after repairs is possible. In gas-insulated switchgear, earthing of switchgear sections is performed by a high quality vacuum circuit-breaker. The circuit-breaker can close onto a short-circuit significantly more frequently and reliably than a positively making earthing switch. The panels are designed for an expected service life of over 40 years. The systematic selection during the development process of the materials used provides for complete recycling or reuse of those materials at the end of the service life. 6 Technical catalogue ZX0.2 TK Revision 01

7 4 Technical data 4.1 Technical data of the panel Table 4.1.1: Technical data of the panel Rated voltage / maximum operating voltage U r kv Rated power frequency withstand voltage 1) U d kv Rated lightning impulse withstand voltage 1) U p kv Rated frequency 2) f r Hz 50 Rated normal current of busbars I r A , Rated normal current 3) I r A , (panel width 600 mm) , , (panel width 900 mm and 1200 mm) Rated peak withstand current I k ka Rated peak withstand current I p ka...80 Rated duration of short-circuit t k s...3 4) 5) Insulating gas system, Alarm level for insulation p ae kpa 6) 120 7) Rated filling level for insulation p re kpa 130 8) Minimum functional level for operation 9) p mm kpa 140 Rated filling level for switch 9) p sw kpa 150 Degree of protection for parts under high voltage IP65 Degree of protection of the low voltage compartment and the mechanism bay 10) IP3X Ambient air temperature, maximum C +40 Ambient air temperature, maximum 24 hour averages 11) C +35 Ambient air temperature, minimum C -5 Site altitude 12) m ) Higher levels to international standards on request 2) Rated current for 60 Hz on request 3) Panels with switch disconnector and fuses: Dependend on fuses 4) Insulating gas: SF 6 (sulphur hexafluoride) 5) All pressures stated are absolute pressures at 20 C 6) 100 kpa = 1 bar 7) Switch disconnector panels: 140 kpa 8) Switch disconnector panels: 150 kpa 9) Only relevant for three position switch disconnector panels 10) Higher degrees of protection on request 11) Higher ambient air temperature on request 11) Higher site altitude on request Technical catalogue ZX0.2 TK Revision 01 7

8 Internal arc classification The panels are arc fault tested in accordance with IEC Table 4.1.2: Internal arc classification of the switchgear in accordance with IEC ) Wall mounting installation Classification IAC Internal arc AFL 31.5 ka 1 s Internal arc classification Free-standing installation Classification IAC Internal arc AFLR 31.5 ka 1 s Rated short-time current and duration of an arc fault in the cable termination compartment and in the busbar compartment 0.87 x 31.5 ka 1s 2) Key to table 4.1.2: IAC AFLR Internal arc classification Accessibility from the rear (R - rear) Accessibility from the sides (L - lateral) Accessibility from the front (F - front) Switchgear installed in closed rooms with access restricted to authorised personnel only The IAC qualification relies on a system consisting of at least three panels. Loss of Service Continuity to IEC The various LSC categories of the standard define the possibility to keep other compartments and/or panels energised when opening a main circuit compartment. Gas-filled compartments cannot be opened, as they would then lose their functionality. This means that there is no criterion for loss of service continuity of inaccessible compartments. Table 4.1.3: Loss of Service Continuity of the switchgear in accordance with IEC Cable compartments and surrounding areas of the fuse boxes Gas compartments: LSC2B Gas compartments are not to be opened under service conditions, and therefore an LSC qualification is not applicable. Key to table 4.1.3: LSC2B Loss of Service Continuity Other panels and all cable compartments may remain energised. 1) IEC corresponds to DIN EN and VDE 0671 Part 200 2) According to IEC , section A three-phase faults do not generally develop in cable compartments with plug-in connectors. That means the actual current value is reduced to approximately 0.87 times the specified internal arc withstand current. 8 Technical catalogue ZX0.2 TK Revision 01

9 Partition class to IEC The partition class to IEC defines the nature of the partition between live parts and an opened, accessible compartment. Table 4.1.4: Partition class in accordance with IEC Partition class PM Key to table 4.1.4: PM: partition of metal Panels of partition class PM provide continuous metallic and earthed partitions between opened accessible compartments and live parts of the main circuit. Technical catalogue ZX0.2 TK Revision 01 9

10 4.2 Technical data of the circuit-breaker Table 4.2.1: Technical Data of the circuit-breaker Rated voltage / maximum operating voltage U r kv Rated power frequency withstand voltage 1) U d kv Rated lightning impulse withstand voltage 1) U p kv Rated frequency 2) f r Hz 50 Rated normal current 3) I r A , Rated short-circuit breaking current I sc ka...25, Rated short-circuit making current I ma ka...63,...80 Rated short-time withstand current I k ka...25, Rated duration of short-circuit t k s...3 Operating sequence O - 0,3 s - CO - 3 min - CO 4) Closing time t cl ms ca. 60 Rated opening time t 3 ms 60 Rated break time t b ms 75 Rated auxiliary voltage V DC 48, 60, 110, 220 5) Power consumption of charging motor W 200 (500 at start-up) Power consumption of opening coil W max. 250 Power consumption of closing coil W max. 250 Power consumption of blocking magnet W 10 Power consumption of undervoltage release W 5 Permissible numbers of operating cycles of the vacuum interrupters x I r (I r = Rated normal current) 50 x I SC (I SC = Rated short-circuit breaking current) Classes according to IEC I k 25 ka I k > 25 ka All circuit-breakers Application: Switching of back-to-back capacitor banks, Special circuit-breaker M2 M1 E2, C2 C2 1) Higher levels to international standards on request 2) Rated current for 60 Hz on request 3) Higher operating currents on request 4) Different operating sequences on request 5) Different auxiliary voltages on request 10 Technical catalogue ZX0.2 TK Revision 01

11 4.3 Technical data of the three position disconnector Table 4.3.1: Technical data of the three position disconnector Rated voltage / maximum rated voltage U r kv Rated power frequency withstand voltage across the isolating distance kv Rated lightning impulse withstand voltage across the isolating distance kv Rated normal current I k , Rated short-time withstand current I k ka Rated peak withstand current I p ka...80 Rated duration of short-circuit t k s...3 Rated auxiliary voltage 1) U a V DC 48, 60, 110, 220 2) Power consumption of mechanism motor W 210 (maximum), 35 (average) Motor running time on opening or closing the disconnector 3) s 6-8 Motor running time on opening or closing the earthing switch 3) s Technical data of the three position switch disconnector with HV HRC fuses Table 4.4.1: Technical data of the three position switch disconnector with HV HRC fuses Rated voltage U r kv Rated power frequency withstand voltage across the isolating distance kv Rated lightning impulse withstand voltage across the isolating distance kv Rated normal current I r A Rated auxiliary voltage U a V DC 48, 60, 110, 220 2) Motor running time on opening or closing the disconnector 3) s 8 1) When a motor-operated mechanism is used 2) Different auxiliary voltages on request 3) At rated auxiliary voltage Technical catalogue ZX0.2 TK Revision 01 11

12 4.5 HV HRC fuses Fuses from Siba (44534 Lünen. Germany) of 442 mm in length and a maximum diameter of 67 mm are used. Shorter fuses have to be fitted with a length adapter. The fuses have thermal protection. Tables and below show the assignment of transformer ratings to possible HV HRC fuse links. As the fuses are installed in a fuse box inside the panel, the operating current is limited to 60 % of the rated current of the fuse. Table 4.5.1: Selection table for HV HRC fuses, (U r up to 12 kv) Relative impedance Rated transformer Operating Voltage Transformer Rating voltage u K current [kv] [kva] [%] [A] Rated current of the HV-fuse min. max. [A] [A] SSK SSK SSK SSK SSK 80 SSK 12 Technical catalogue ZX0.2 TK Revision 01

13 Table 4.5.2: Selection table for HV HRC fuses, (U r up to 24 kv) Relative impedance Rated transformer Operating Voltage Transformer Rating voltage u K current [kv] [kva] [%] [A] Rated current of the HV-fuse min. max. [A] [A] SSK 63 SSK SSK 80 SSK SSK SSK Technical catalogue ZX0.2 TK Revision 01 13

14 5 Alternative protection and control concepts of panels with circuit-breakers ZX0.2 Protection and control unit e.g. 615 series Protection unit e.g. 610 series Protection and control unit e.g. 630 series Protection and control unit e.g. 630 series Three position disconnector - manual mechanism Three position disconnector - manual mechanism Three position disconnector - motorised mechanism, remote control possible Mechanical interlocks Three position disconnector, circuit-breaker Mechanical interlocks Three position disconnector, circuit-breaker Mechanical and electrical interlocks Three position disconnector, circuit-breaker 14 Technical catalogue ZX0.2 TK Revision 01

15 6 Fundamental structure of the panels The switchgear system is suitable for both free-standing installation (fig. 6.1) and wall mounting installation (fig. 6.2). Modular structure Each cable feeder panel consists of the gas-filled panel module (A), the solid insulated busbars (B), the cable termination compartment (C), the low voltage compartment (D) and the mechanism bay (E). There are no gas connections between the two compartments in adjacent panels. Fig. 6.1: Outgoing cable panel 1250 A (free-standing installation) Fig. 6.2: Incoming cable panel 1600 A with voltage transformers on the busbar and on the outgoing feeder (wall mounting installation) B D B D A E 2400 E 2400 A C C Technical catalogue ZX0.2 TK Revision 01 15

16 Panel module (A) The panel module essentially contains all the live high voltage parts, i.e. the switching devices, bushings for connection of the busbar and outer cones for connection of the high voltage cables. Current and voltage transformers are located outside the panel modules. The pressure relief disk for the panel module is located in the rear wall of the enclosure. The seals of the components are o-ring seals which are not exposed to any UV radiation. Panel module with circuit-breaker and three position disconnector (figs. 6.3 and 6.4) The circuit-breaker operating mechanism, the gas density sensor and the filler valve are located on the circuit-breaker mounting plate, which is bolted to the front wall of the panel module. The operating mechanism of the three position disconnector is positioned above the circuit-breaker operating mechanism on the front wall of the panel module. The live high voltage parts of the switches are located inside the panel module, and the operating mechanisms are easily accessible outside the gas compartment. The gas systems of panel modules in a switchgear system consisting of several panels are not connected together. Three position disconnectors, circuit-breakers with three position disconnectors and switch disconnectors with HV HRC fuses can be used. Fig. 6.3: Panel module with circuit-breaker, 1250 A, panel width 600 mm Fig. 6.4: Panel module with circuit-breaker, 2000 A, panel width 1200 mm Panel module (enclosure) 1.1 Circuit-breaker pole 1.2 Circuit-breaker mechanism 1.3 Outer cone 1.7 Isolating system for voltage transformer 1.8 Voltage transformer 1.9 Current transformer 1.10 Gas density sensor 1.11 Gas filling valve 1.12 Cast resin bushing to busbar 1.13 Pressure relief disk 2.3 Three position disconnector 2.4 Three position disconnector operating mechanism 3.5 Main earthing bar Insulating gas SF 6 16 Technical catalogue ZX0.2 TK Revision 01

17 Panel module with three position switch disconnector and fuses (fig. 6.5) The live parts of the switch are inside the panel module and the operating mechanism is located in an easily accessible position outside the gas compartment. The optional fuses can be replaced without any gas work Fig. 6.5: Panel module with switch disconnector and fuses Panel module (enclosure) 1.3 Outer cone 1.10 Gas density sensor 1.11 Gas filling valve 1.13 Pressure relief disk 1.15 Three position switch disconnector 1.16 Three position switch disconnector operating mechanism 1.17 Fuse box 1.18 Earthing switch Insulating gas SF 6 Technical catalogue ZX0.2 TK Revision 01 17

18 The busbar (B) The solid insulated busbar is located on the roof plates of the panel modules. The insulating silicone parts of the busbar (end adapters, cross adapters and conductor insulation) have a metallised, earthed coating on the outside. The busbar is thus shockproof in normal operation. The busbar can be fitted with voltage and current transformers. Fig. 6.6: Busbar with optional current and voltage transformers on a four-panel ZX0.2 switchgear system (viewed from the rear), shown without cover plates on the busbar Panel module (enclosure) 1.8 Voltage transformer 1.9 Current transformer 1.12 Cast resin bushing to busbar 2.1 Busbar 18 Technical catalogue ZX0.2 TK Revision 01

19 The cable termination compartment (C) The cable termination compartment (figs. 6.7 and 6.8) represents a supporting frame for the panel, manufactured from aluminium sections and galvanised steel sheets. The cable termination compartments of adjacent panels are segregated from each other by sheet steel walls. The cable termination compartment contains the main earthing bar (3.5), the high voltage cables (3.2) with cable connectors (3.1) and cable fasteners (3.3), optional surge arresters, current transformers and optional voltage transformers (1.8) and the mechanism for the isolating device for voltage transformers (3.8). The cover of the cable termination compartment may optionally be interlocked so that the cable termination compartment is only accessible when the cables are earthed. In the unlikely event of an internal arc fault in the cable termination compartment, the pressure is discharged to the rear. Partitioning of the cable termination compartment from the cable basement is effected by split floor plates in the area of the cables. The cable termination compartment is safe to touch when appropriate cable connectors are used. Fig. 6.7: Cable termination compartment (C), example configuration with one cable per phase Fig. 6.8: Cable termination compartment (C), example configuration with fixed mounted voltage transformers and two cables per phase Voltage transformers, in this case fixed mounted 1.9 Current transformers 3.0 Cable termination compartment (C) 3.1 Cable connector 3.2 High voltage cable 3.3 Cable fastener 3.5 Main earthing bar 3.6 Floor plate 3.7 Cover 3.8 Mechanism for the voltage transformer isolating device (optional) Technical catalogue ZX0.2 TK Revision 01 19

20 The low voltage compartment (D) and the mechanism bay (E) The low voltage compartment and the mechanism bay are two independent metal enclosures. The low voltage compartment has a door (door stop alternatively right- or left-hand side), and the mechanism bay a screw-fastened cover. The low voltage compartment accommodates the protection devices and further secondary equipment with wiring. The mechanism bay houses the operating mechanism for the circuit-breaker (1.2), the operating mechanism for the three position disconnector (2.5) or operating mechanism for the three position switch disconnector, and the sensors for gas density monitoring (1.10) and the filler valve (1.11) of the gas compartment. the cover of the mechanism bay. The controls and indicators of the operating mechanisms are accessible from the outside. The entry for external secondary cables (6.5) is located in the roof plate of the low voltage compartment. Optionally, the entries for secondary cables can be provided in the floor plate of the cable termination compartment. In that case, the secondary cables are led in through the floor plate of the cable termination compartment at the left and laid through the cable termination compartment and through the mechanism bay towards the low voltage compartment in a cable duct at the side. The sockets for the capacitive indicator system (1.5) are located in Fig. 6.9: Low voltage compartment and mechanism bay Circuit-breaker operating mechanism 1.5 Measuring sockets for capacitive voltage indicator system 1.10 Gas density sensor 1.11 Gas filling valve 2.5 Three position disconnector operating mechanism 6.0 Low voltage compartment 6.6 Low voltage compartment door 6.5 Secondary cable entry 6.10 Mechanism bay Technical catalogue ZX0.2 TK Revision 01

21 7 Components Fig. 7.1: Circuit-breaker panel, 1250 A, example configuration , Fig. 7.2: Circuit-breaker panel, 1600 A, example configuration 1.8a b , Technical catalogue ZX0.2 TK Revision 01 21

22 Fig. 7.3: Panel with switch disconnector and fuses, example configuration , Panel module 1.1 Circuit-breaker pole 1.2 Circuit-breaker operating mechanism 1.3 Outer cone 1.5 Measuring sockets for capacitive voltage indicator system 1.7 Isolating system for voltage transformer 1.8a Voltage transformer for busbar measurement (optional) 1.8b Voltage transformer for feeder measurement (optional) 1.9 Current transformer 1.10 Gas density sensor 1.11 Filling valve 1.12 Cast resin bushing to busbar 1.13 Pressure relief disk 1.15 Three position switch disconnector 1.16 Three position switch disconnector mechanism 1.17 Fuse box 1.18 Heat sink 2.1 Busbar 2.3 Three position disconnector 2.4 Three position disconnector mechanism 3.0 Cable compartment 3.1 Cable connector 3.2 High voltage cable 3.3 Cable fastener 3.5 Main earthing bar 3.6 Floor plate 3.8 Mechanism for the voltage transformer isolating device (optional) 6.0 Low voltage compartment 6.5 Secondary cable entry 6.6 Low voltage compartment door 6.10 Mechanism bay Insulating Gas SF 6 22 Technical catalogue ZX0.2 TK Revision 01

23 7.1 Vacuum circuit-breaker The fixed mounted vacuum circuit-breakers are three phase switching devices and fundamentally consist of the operating mechanism and the three pole parts. The pole parts contain the switching elements proper, the vacuum interrupters. The pole parts are installed on a common mounting plate. The operating mechanism is on the opposite side from the mounting plate. In this way, the pole parts, mounting plate and operating mechanism form a single assembly. The mounting plate for this assembly is screwed to the front wall of the circuit-breaker compartment in a gas-tight manner at the works. For earthing, the three position disconnector prepares the connection to earth while in the de-energised condition. Earthing proper is performed by the circuit-breaker. A circuit-breaker functioning as an earthing switch is of higher quality than any other earthing switch. The circuit-breaker operating mechanism is located in the mechanism bay of the panel. The indicators and controls for the circuitbreaker are located in the operator control area of the panel (fig ) and are accessible from the outside. The pole parts are located in the circuit-breaker compartment which is filled with SF 6, and are therefore protected from external influences. The operating mechanism is located in the mechanism bay and is therefore easily accessible. Functions of the vacuum circuit-breaker - Switching operating current on and off - Short-circuit breaking operations - Earthing function in conjunction with the three position disconnector Fig : Operator control area, controls and indicators for the circuit-breaker (3) 5 1 Mechanical ON pushbutton circuit-breaker 2 Mechanical OFF pushbutton circuit-breaker 3 Receptacle for manual charging of the stored-energy spring (behind the cover) 4 Mechanical indicator for Circuit-breaker ON Circuit-breaker OFF 5 Mechanical indicator Stored-energy spring charged Stored-energy spring discharged 6 Operating cycle counter Technical catalogue ZX0.2 TK Revision 01 23

24 Secondary equipment for the circuit-breaker operating mechanism The secondary equipment options for the circuit-breaker operating mechanism can be found in table Table 7.1.1: Secondary equipment options for the circuit-breaker operating mechanism IEC designation VDE designation Equipment Standard Option -MS (-M0) Charging motor for spring mechanism -BS2 (-S1) Auxiliary switch Spring charged -MO1 (-Y2) Shunt release OFF -MC1 (-Y3) Shunt release ON -BB1 (-S3) Auxiliary switch CB ON/OFF -BB2 (-S4) Auxiliary switch CB ON/OFF -BB3 (-S5) Auxiliary switch CB ON/OFF -KN (-K0) Anti-pumping device -RL1 (-Y1) Blocking magnet CB ON -BL1 (-S2) Auxiliary switch for blocking magnet -BB4 (-S7) Auxiliary switch for fault signal (impulse time 35 ms) -MU (-Y4) 2) Undervoltage release -MO3 (-Y7) 2) Indirect overcurrent release -MO2 (-Y9) 2 nd shunt release OFF 1) With control by RE_ 2) Combination of -MU with -MO3 is not possible 24 Technical catalogue ZX0.2 TK Revision 01

25 Locking of the mechanical pushbuttons The following methods of locking the mechanical pushbuttons for the circuitbreaker are available. Fig : Securing to prevent operation of the OFF button and securing to prevent cancellation of earthing Securing to prevent operation of the OFF button (fig ) The standard version of the OFF button is fitted with a swivel flap. The padlocked flap prevents operation of the OFF button. Interlocking of the OFF button in the earthed condition (fig ) (securing to prevent cancellation of earthing) In addition to the lock to prevent operation of the OFF button, the mechanical OFF button for the circuit-breaker can only be locked in this version when the earthing switch and the circuit-breaker are closed (feeder earthing). Locking to prevent inadvertent operation of the OFF and/or ON buttons (fig ) Fig : Securing by lock switch (locking of both buttons shown here) The devices permit locking of the ON and/or OFF buttons with padlocks. Locking by lock switch (fig ) The ON and/or OFF buttons can be designed as lock switches. In this option, the ON button can only be operated with a key. The button does not engage when pressed. The OFF button can be operated without a key. The switch remains in the OFF position, as the button engages when pressed. Electrical closing of the circuit-breaker is not then possible. The pressed OFF button can be released locally with the key. Fig : Locking by lock switch: locking of the OFF button Technical catalogue ZX0.2 TK Revision 01 25

26 7.2 Three position disconnector The three position disconnectors are combined disconnectors and earthing switches. The three switch positions, connecting, disconnecting and earthing, are clearly defined by the mechanical structure of the switch. Simultaneous connection and earthing is therefore impossible. Knife-switch three position disconnectors are used. The switching components of the three position disconnector are located in the SF 6 -filled panel module, while the operating mechanism block is easily accessible in the low voltage compartment. The three position disconnectors can be manually or motor-operated operated. Emergency manual operation is always possible. The mechanical controls and indicators for the operating mechanism are located in the cover of the mechanism bay and are accessible from the outside. Manual operating mechanism For manual operation of the switch with a lever (1), the relevant opening for the lever (5 and 3, for the disconnector or earthing switch) is to be uncovered by turning the selector lever. The switch position is indicated mechanically (2 and 4). In order to avoid maloperation, manual mechanisms are interlocked mechanically with the relevant circuit-breaker within the panel. Motorised operating mechanism Motorised mechanisms are preferably to be operated using the control unit. Manual operation as with a manual mechanism is also possible. The motorised mechanism is mechanically and electrically interlocked with the circuit-breaker. Fig : Operator control area, mechanical controls and indicators for the three position disconnector Selector lever 2 Switch position indicator earthing switch 3 Opening for operation of the earthing switch 4 Switch position indicator disconnector 5 Opening for operation of the disconnector 26 Technical catalogue ZX0.2 TK Revision 01

27 Mechanism variants and secondary equipment The secondary equipment options for the three position disconnector mechanism variants can be found in table Table 7.2.2: Secondary equipment options for the three position disconnector operating mechanism variants in a feeder panel Three position disconnector operating mechanism IEC designation VDE designation Equipment Manual mechanism Motor-operated mechanism Standard Option Standard Option -MI (-M1) Drive motor -BI1 (-S15) Microswitch to detect switch position Disconnector OFF -BI2 (-S16) Microswitch to detect switch position Disconnector ON -BE1 (-S57) Microswitch to detect switch position Earthing switch OFF -BE2 (-S58) Microswitch to detect switch position Earthing switch ON -BI1 (-S11) Auxiliary switch Disconnector OFF -BI2 (-S12) Auxiliary switch Disconnector ON -BE1 (-S51) Auxiliary switch Earthing switch OFF -BE2 (-S52) Auxiliary switch Earthing switch ON -BL1 (-S151) Microswitch on the selector lever -BL2 (-S152) -RL4 (-Y1) Blocking magnet disconnector -RL3 (-Y5) Blocking magnet earthing switch 1) When shunt release ON MC1 is used in the circuit-breaker operating mechanism Technical catalogue ZX0.2 TK Revision 01 27

28 7.3 Three position switch disconnector with fuse The three position switch disconnectors with fuses are a combination of a switch disconnector, a positively making earthing switch, an HV HRC fuse and an additional positively making cable earthing switch. Knife-type three position switch disconnectors are used. The switching elements (1) of the three position switch disconnectors are located in the SF 6 -filled panel module. The disconnector contact of the three position switch disconnector is fitted with a quenching plate system. This consists of cooling plates which split the arc into short partial arcs connected in series. The reestablishment of the contact gap after extinction of the arc at the current zero is supported by the cooling of the arc. The HV HRC fuses are located in the fuse box below the switch disconnector, in air at atmospheric pressure. A fuse flap (1.19) located in front of the insulated handles on the HV HRC fuse is blocked when the outgoing feeder is not earthed. Blown fuses can therefore only be replaced when the feeder is earthed. The additional cable earthing switch ensures that blown HV HRC fuses are also earthed on the cable side. Operation of the cable earthing switch is effected positively when the earthing switch in the three position switch disconnector is operated. The operating mechanism block is located in the low voltage compartment and is therefore easily accessible. The mechanism for the switch is designed as a snap action spring mechanism, and the switching velocity is therefore independent of the speed at which the mechanism is operated. The switch disconnector is always manually operated. The mechanical ON button of the operating mechanism can optionally be secured with a padlock. The controls and indicators of the operating mechanism are shown in fig Options for secondary equipment on the mechanism can be found in table Fig : Controls and indicators of a panel with switch disconnector and fuses Mechanical OFF pushbutton switch disconnector 2 Mechanical ON pushbutton switch disconnector 3 Opening for manual charging of the switch-disconnector s stored-energy spring 4 Opening for operation of the earthing switch 5 Mechanical indicator for Circuit-breaker ON Circuit-breaker OFF 6 fuse blown indicator 7 Mechanical indicator Stored-energy spring charged Stored-energy spring discharged 28 Technical catalogue ZX0.2 TK Revision 01

29 Table 7.3.1: Secondary equipment options for the three position switch disconnector operating mechanism with fuse IEC designation VDE designation Equipment Standard Option -BI1 (-Q0S3) Auxiliary switch switch disconnector ON/OFF -BI2 (-Q0S4) Auxiliary switch switch disconnector ON/OFF -BI3 (-Q0S13) Auxiliary switch switch disconnector ON/OFF -BI4 (-Q0S14) Auxiliary switch switch disconnector ON/OFF -BE1 (-Q8S1) Auxiliary switch earthing switch ON/OFF -BE2 (-Q8S2) Auxiliary switch earthing switch ON/OFF -BE3 (-Q8S11) Auxiliary switch earthing switch ON/OFF -BE4 (-Q8S12) Auxiliary switch earthing switch ON/OFF -BI5 (-Q0S1) -BI6 (-Q0S2) Auxiliary switch earthing switch ON/OFF -MO1 (-Q0Y2) Shunt release OFF -FF1 (-F1S1) Auxiliary Switch HV HRC fuse blown -RLI15 (-Q0S151) Auxiliary switch selector slide position disconnector -RLE15 (-Q8S151) Auxiliary switch selector slide position earthing switch Technical catalogue ZX0.2 TK Revision 01 29

30 7.4 Busbar The busbars are located outside the gas compartment. The insulation of the busbar is of silicone. The surfaces of the busbar components are metallised and are connected to earth potential after assembly. The busbars are thus shockproof in normal operation. Bushing-type current transformers can be mounted between two panels in the busbar run. Voltage transformers can be installed above the cross and end adapters for detection of the busbar voltage (see also fig. 6.7). The conductive connections between the busbars and from the busbars to the relevant cast resin bushing in the panel module are made by the cross and end adapters. Fig : Busbar with cross and end adapters 30 Technical catalogue ZX0.2 TK Revision 01

31 7.5 Outer cone termination system Outer cone device termination components to EN and EN 50181, fitted gas-tight in the wall between the panel module and the cable termination compartment, facilitate connection of cables and surge arresters (figs to 7.5.3). The termination height of 700 mm provides for good accessibility when installing cables. When the shutter on the cable termination compartment has been removed, the cables are accessible from the front of the system. In panels of 1200 mm width, the two outer cones per phase are to be fitted with the same number of plug connectors. Furthermore, at operating voltages of up to 12 kv, operating currents of up to 630 A and short-time withstand currents of up to 25 ka, connection of plastic-insulated cables (35 mm mm 2 ) and paper-insulated cables (50 mm mm 2 ) is possible using an insulated cable termination (type RCAB 12 kv) from manufacturer Tyco. This cable termination (fig ) is not shockproof. When this termination system is used, the cover on the cable termination compartment should be lockable. Apart from this, always use shockproof termination systems where possible. Fig : View into the cable termination area with outer cones in air, without cable connectors (during assembly at the works, without the cable termination compartment) Fig : Outer cones in a panel with three position disconnector and fuses Fig : View into the cable termination compartment in air with shockproof cable connectors (ABB type SOC ) and cables Fig : Cable termination RCAB 12 kv from Tyco, 630 A, 25 ka Technical catalogue ZX0.2 TK Revision 01 31

32 7.5.1 Outer cone connectors type Kabeldon SOC from ABB In the form of the Kabeldon SOC product, ABB offers outercone connectors for polymeric cables of all current cable cross-sections and cable diameters. The connectors are made of rubber and they are cold mountable. The outer conductive layer of the conductor ensures a touch proof system is approximate 2 mm thick and vulcanized together in one process with the insulation and inner deflector. This method gives a robust product with highest mechanical withstand. All connector sleeves are routinely tested with regards to partial discharge and AC, to ensure that supplied accessories are of highest quality. The kits are supplied with adaptor, cable lug and connector hood with pre-installed earth conductor. Extra material such as earthing kits, crutch seals for 3-core cables and screen potential material for cable armouring is also within the ABB range of products. Kindly contact ABB Sales Representative for more information. Fig : Connector ABB type Kabeldon SOC for cable cross section from 25 to 300 mm 2 Fig : Connector ABB type Kabeldon SOC for cable cross section from 400 to 630 mm 2 Table : Technical data of the connector ABB Kabeldon type SOC Voltage level Designation Diameter over insulation Conductor cross section [kv] [mm] [mm 2 ] SOC , SOC ,4-34, SOC , SOC , SOC Technical catalogue ZX0.2 TK Revision 01

33 7.5.2 Further outer cone connector systems A selection of various shockproof connector systems which can be installed depending on the space available is presented in tables and When making your selection, please observe the current and short-circuit ratings of the cables and connector systems. Please consult the manufacturers latest catalogues for the precise ordering data and information on any couplings required. Table : Selection of cable connectors, panels with three position switch disconnector and fuses, 12 kv Maximum operating voltage Cable cross-section Cables fitted One cable ABB Kabeldon Cable connector manufacturer / connector type EUROMOLD nkt cables GmbH Südkabel GmbH Tyco [kv] [mm 2 ] LR SOC EASW 10/250 RSES SEW12 Technical catalogue ZX0.2 TK Revision 01 33

34 Table : Selection of cable connectors, panel width 600 mm, 12 kv Maximum operating voltage Cable cross-section One cable Two cables Cables fitted Three cables One cable + surge arrester Two cables + surge arrester Three cables + surge arrester ABB Kabeldon Cable connector manufacturer / connector type EUROMOLD nkt cables GmbH Südkabel GmbH Tyco [kv] [mm 2 ] TB CB RSTI-58xx 400TB/G 430TBM-P2 CB RSTI-58xx CC RSTI-CC-58xx 430TBM-P3 CB RSTI-58xx 2 x CC x RSTI-CC-58xx 430TB CB RSTI-58xx 300SA CSA12-. RSTI-CC-58SA 400TB/G 400PB CB RSTI-58xx 430TBM-P2 CC RSTI-CC-58xx 300SA CSA RSTI-CC-58SA CB x CC CSA RSTI-58xx 2 x RSTI-CC-58xx RSTI-CC-58SA SOC SET12 SET12 SEHDK SET12 MUT13 SET12 SEHDK13.1 MUT SOC SEHDT SEHDT13 MUT SOC CB36-630(1250) CB36-630(1250) CC36-630(1250) CB36-630(1250) 2 x CC36-630(1250) 400 CB36-630(1250) 500 CSA CB36-630(1250) CC36-630(1250) CSA12-.. CB36-630(1250) 2 x CC36-630(1250) CSA TB/G 440TB/G-P TB/G 400PB RSTI-x95x 500 SOC SOC Technical catalogue ZX0.2 TK Revision 01

35 Table : Selection of cable connectors, panel width 1200 mm, 12 kv Maximum operating voltage Cable cross-section Two cables Cables fitted Four cables Six cables Four cables + surge arrester Six cables + surge arrester ABB Kabeldon Cable connector manufacturer / connector type EUROMOLD [kv] [mm 2 ] 4 x 400TB/G 2 x CB x RSTI-58xx 2 x CC x RSTI-CC-58xx 2 x 430TBM-P2 2 x 430TBM-P3 2 x CB x RSTI-58xx 4 x CC x RSTI-CC-58xx x CB x RSTI-58xx 2 x 430TBM-P2 2 x CC x RSTI-CC-58xx 300SA CSA RSTI-CC-58SA 2 x CB x CC CSA x RSTI-58xx 4 x RSTI-CC-58xx RSTI-CC-58SA x SEHDT SOC x CB36-630(1250) 2 x CC36-630(1250) 2 x CB36-630(1250) 4 x CC36-630(1250) x CB36-630(1250) x CC36-630(1250) CSA x CB36-630(1250) 4 x CC36-630(1250) CSA x 440TB/G-P x RSTI-x95x 500 SOC SOC nkt cables GmbH Südkabel GmbH Tyco Table : Selection of cable connectors, panels with three position switch disconnector and fuses, 24 kv Cables fitted Cable connector manufacturer / connector type Maximum operating voltage Cable cross-section One cable ABB Kabeldon (recommended) EUROMOLD nkt cables GmbH Südkabel GmbH Tyco [kv] [mm 2 ] RSES-52xx K158LR SOC 250 SEW CE Technical catalogue ZX0.2 TK Revision 01 35

36 Table : Selection of cable connectors, panel width 600 mm, 24 kv Maximum operating voltage Cable cross-section One cable Two cables Cables fitted Three cables One cable + surge arrester Two cables + surge arrester Three cables + surge arrester ABB Kabeldon Cable connector manufacturer / connector type EUROMOLD nkt cables GmbH Südkabel GmbH Tyco [kv] [mm 2 ] CB RSTI-58xx CB RSTI-58xx CC RSTI-CC-58xx CB RSTI-58xx 2 x CC x RSTI-CC-58xx CB RSTI-58xx CSA24-. RSTI-CC-58SA CB CC CSA RSTI-58xx RSTI-CC-58xx RSTI-CC-58SA CB RSTI-58xx 2 x CC CSA x RSTI-CC-58xx RSTI-CC-58SA K430TB K400TB/G K430TBM-P2 K430TBM-P3 K430TB K300SA K400TB/G K400PB K430TBM-P2 K300SA SOC SET24 24 SET24 SEHDK SET24 MUT23 SET24 EHDK23.1 MUT SOC SEHDT SEHDT23 MUT SOC CB36-630(1250) CB36-630(1250) CC36-630(1250) CB36-630(1250) 2 x CC36-630(1250) 400 CB36-630(1250) 500 CSA CB36-630(1250) CC36-630(1250) CSA24-.. CB36-630(1250) 2 x CC36-630(1250) CSA Technical catalogue ZX0.2 TK Revision 01

37 Table : Selection of cable connectors, panel width 600 mm, 24 kv Maximum operating voltage Cable cross-section One cable Two cables Cables fitted Three cables One cable + surge arrester Two cables + surge arrester Three cables + surge arrester ABB Kabeldon Cable connector manufacturer / connector type EUROMOLD nkt cables GmbH Südkabel GmbH Tyco [kv] [mm 2 ] K440TB/G K440TB/G-P2 K440TB/G K400PB RSTI-x95x 500 SOC SOC Technical catalogue ZX0.2 TK Revision 01 37

38 Table : Selection of cable connectors, panel width 1200 mm, 24 kv Maximum operating voltage Cable cross-section Two cables Cables fitted Four cables Six cables Four cables + surge arrester Six cables + surge arrester ABB Kabeldon Cable connector manufacturer / connector type EUROMOLD [kv] [mm 2 ] 2 x CB x RSTI-58xx 2 x CC x RSTI-CC-58xx 2 x CB x RSTI-58xx 4 x CC x RSTI-CC-58xx x CB x RSTI-58xx 2 x CC x RSTI-CC-58xx CSA RSTI-CC-58SA 2 x CB x CC CSA x RSTI-58xx 4 x RSTI-CC-58xx RSTI-CC-58SA 4 x K400TB/G 2 x K430TBM-P x K430TBM-P3 2 x K430TBM-P2 K300SA x SEHDT SOC x CB36-630(1250) 2 x CC36-630(1250) 2 x CB36-630(1250) 4 x CC36-630(1250) x CB36-630(1250) x CC36-630(1250) CSA x CB36-630(1250) 4 x CC36-630(1250) CSA x 440TB/G-P x RSTI-x95x 500 SOC SOC nkt cables GmbH Südkabel GmbH Tyco 38 Technical catalogue ZX0.2 TK Revision 01

39 7.6 Surge arresters Surge arresters are fitted directly with cable connectors. Fitting of several cables plus a surge arrester per phase is possible (see tables to ). The terminals of the surge arresters must be suitable for the type of cable connector used. Further information on surge arresters can be obtained from the relevant cable connector manufacturer. In addition, surge arresters can be directly connected to the busbar. We will be pleased to provide information on these surge arresters on request. 7.7 Main earthing bar LRM-system (Fig ) Additional indicator unit (Fig ) required Repeat testing necessary KVDS-system (Fig ) LC-Display Three phase No additional indicator unit required Maintenance-free with integrated self-test: No symbol visible: De-energised Half lightning arrow displayed: Voltage applied Full lightning arrow displayed: Voltage applied and selftest passed Fig : Three phase LRM-system The main earthing bar of the switchgear system runs through the cable termination compartments of the panels. The earthing bars in the individual panels are connected together during installation at site. The cross-section of the main earthing bar is 300 mm 2 (ECuF30 30 mm x 10 mm). 7.8 Capacitive voltage indicator systems Fig : Indicator unit for LRM-systems Various capacitive, low impedance voltage indicator systems are available for checking of the off-circuit condition of a feeder. The high voltage side capacitor is integrated in the outer cone device termination components. The capacitive voltage indicator system is located in the low voltage compartment door. Capacitive pick-offs can be installed on cross or end adapters in the solid insulated busbars to detect the off-circuit condition of the busbars. The capacitive voltage indicator system can be integrated in the cover of the operator control area of incoming or outgoing feeder panels and in sectionaliser and riser panels. Fig : KVDS-system All systems used are voltage dectection systems (VDS) according to IEC All the systems used permit phase comparison with the aid of an additional, compatible phase comparator. Technical catalogue ZX0.2 TK Revision 01 39

40 CAVIN-system (Fig ) Fig : CAVIN-system As the KVDS-system, but: Two integrated relay contacts for signals/interlocks LED display of relay status: No Error: Relay 1 closed (All three conductors have the same voltage state and auxiliary voltage is available.) Error: Relay 1 open (The three conductors are carrying different voltages, or the auxiliary voltage has failed.) HV OFF: Relay 2 closed (U L1 = U L2 = U L3 < phase to earth voltage when the response voltage is reached.) HV ON: Relay 2 open (In at least one phase, U / 3 > phase to earth voltage when the response voltage is reached, or auxiliary voltage has failed.) Auxiliary voltage required for the relays Table 7.8.1: Scope of function of the capacitive voltage indicator systems System Technical characteristics Additional indicator unit required LC-display Integrated self-test Two relay contacts Auxiliary voltage required for relays LRM KVDS Three phase Low impedance CAVIN 40 Technical catalogue ZX0.2 TK Revision 01

41 7.9 Current and voltage detection devices The areas of application for current and voltage detection devices are Abb : Ring core current transformer up to 1250 A Protection applications, Measurement, Billing metering Ring core current transformers Ring core current transformers are used for feeder metering in termination panels. They are located on the outer cone outside the gas compartment. Two cones per phase are used in panels for currents > 1250 A. In these cases, a ring core current transformer as shown in fig is to be used. The winding of the ring core current transformer is enclosed in cast resin. The cross-section of the connecting wiring is 2.5 mm² (larger cross-sections on request). Current transformers as shown in fig are optionally available with terminal boxes. The possible technical data can be found in the following table. Abb : Ring core current transformer up to 2500 A Panels with one cable per phase can also be fitted with straightthrough current transformers on request. Table : Technical data of the ring core current transformers Current transformer type 1 2 Rated voltage U r kv 0,72 0,72 Rated short duration power-frequency withstand voltage U d kv 3 3 Rated frequency f r Hz 50 / 60 Rated thermal short-time current I therm 31,5 ka - 3 s Rated impulse current I p ka 80 Panel width mm Rated primary current I r A Rated secondary current A 1 or 5 Max number of cores 1 2 Core data 1) Measuring cores Capacity VA Class 0,2 / 0,5 / 1 0,2 / 0,5 / 1 Protection cores Capacity VA 1 to 10 2,5 to 15 Class 5P Overcurrent factor 20 1) Dependent on rated primary current. Technical catalogue ZX0.2 TK Revision 01 41

42 7.9.2 Dimensioning of current transformers The stipulations and recommendations of IEC 61936, section Current transformers, lec / EN and lec are to be observed in the design of current transformers. The rated overcurrent factor and rated burden of current transformer cores are to be selected in such a way that protection devices can function correctly and measuring systems are not damaged in the event of a short-circuit. Protection purposes Protection cores are, logically, operated at above rated current. The function of the selected protection system is essentially determined by the connected current transformer. The requirements to be fulfilled by the current transformers for the selected protection or combination device can be found in the documentation from the protection equipment supplier. For an accurate switchgear proposal, these current transformer data are to be provided with the product enquiry and then finally agreed by the operator and manufacturer in the order. The direct path to the right current transformers is via the technical documentation of the selected protection device. The current transformer requirements of the relay can be found there. Measuring purposes In order to protect measuring and metering devices from damage in the case of a fault, they should go into saturation as early as possible. The rated burden of the current transformer should be approximately the same as the operating burden consisting of the measuring instrument and cable. Further details and designations can be found in EN Recommendations In principle, we recommend a rated secondary current of 1 A. The current transformer ratings for ABB protection devices are known. The transformer data can be selected to suit the protection application and the network parameters. If, however, third party devices are to be connected, we recommend a review by our engineers at an early stage. Taking account of the burdens and overload capacities, our experts can examine the entire current transformer requirements of the third party protection devices on request. Further information for different protection systems If the current transformers to be used in the network concerned (e.g. on the opposite side of the network) have already been specified, early coordination of the switchgear configuration is advisable. This requires, but is not limited to, the provision of data on the ratio, rated capacity, accuracy class, and the resistance of the secondary winding and secondary wiring. Further configurations for the particular application can then be requested. 42 Technical catalogue ZX0.2 TK Revision 01

43 7.9.3 Voltage transformers The voltage transformers are always located outside the gas compartments. They can be permanently mounted or of the plug-in type (plug size 2 to DIN and EN 50181). Feeder voltage transformers are equipped with a series isolating system. After operation of the isolating system, the voltage transformers are earthed. Busbar voltage transformers are of the plug-in type. The possible electrical data can be found in the table below. Fig : Voltage transformer for fixed mounting Fig : Voltage transformer, plug-in type Table Technical data of voltage transformers Type of voltage transformer Max. capacity Class Rated secondary voltage of the metering winding Rated secondary voltage of the earth fault winding Rated thermal current limit of the metering winding with rated voltage factor 1.2 / continuous Rated thermal long duration current of the earth fault winding with rated voltage factor 1.9 / 8 h plug-in type fixed mounted [VA] [V] [V] [A] [A] 30 0,2 100 / / ,5 110 / / ,2 100 / / ,5 110 / / Table : Rated power frequency withstand voltage of voltage transformers Rated voltage [kv] Rated power frequency withstand voltage (1 min) [kv] < 6 5 x U r > > Technical catalogue ZX0.2 TK Revision 01 43

44 7.10 Protection and control units ABB provides the right protection and automation solution for every application. Table below provides an overview of the most important protection devices with notes on their range of applications. Further information can be obtained in the Internet ( de/mediumvoltage) or from the responsible ABB contact for you. Table : Range of application of protection and control units Device designation Incomer Feeder Metering panel Bay control and measurement Capacitor bank protection Motor protection Generator protection Transformer protection Voltage regulation Back-up protection Feeder automation Cable differential protection Basic Range Middle Range High Range SPAM 150 C SPAJ 140 C SPAJ 160 C SPAU 140 C SPAF 140 C REC 501 REU 610 REM 610 REF 610 SPAU 341 C SPAD 346 C REX 521B01 REX 521B02 REX 521M01 REX 521M02 REX 521H01 REX 521H02 REX 521H03 REX 521H04 REX 521H05 REX 521H06 REX 521H07 REX 521H08 REX 521H09 REX 521H50 REX 521H51 REF 615 1) RED 615 1) RET 615 1) REM 615 1) REM 543 Motor Generator REM 545 Motor Generator RET 541 Control RET 543 Basic RET 545 Multi REF 541 Control REF 543 Basic REF 545 Multi REC 523 Basic low Basic REF 542plus Multi low Multi Differential Distance REF 630 RET 630 REM 630 1) Control of a circuit-breaker is possible 44 Technical catalogue ZX0.2 TK Revision 01

45 7.11 Sulphur hexafluoride SF 6 is a non-toxic, inert insulating gas with high dielectric strength and thermal stability. Its unique electrical and thermal properties have made the design of new, more efficient switchgear possible. The change from conventional insulation to the non-flammable, chemically inactive and non-toxic heavy gas sulphur hexafluoride has led to significant savings in space and materials, and to greater safety of the installations. Switchgear systems insulated with sulphur hexafluoride have become highly successful especially in applications where space is constricted and compact design is required. On account of their insensitivity to air pollution, enclosed SF 6 systems are also used in the chemicals industry, in desert areas and at coastal locations. Thanks to SF 6 technology, new substations can also be erected at load centres in densely populated areas where high land prices prohibit other solutions. SF 6 has been used in HV-switchgear since Gas system in the panels SF 6 is used as the insulation medium. Furthermore, SF 6 is used as the quenching gas in panels with switch disconnector and fuses for interruption of operating currents. The gas compartments are designed as hermetically sealed pressure systems. As they are filled with SF 6, constant ambient conditions are permanently ensured for the entire high voltage area of the panel. It is not necessary to top up the insulating gas during Fig : Gas filling connector (1) and density sensor (2) the expected service life of the system. Under normal operating conditions, no checks on the insulating gas are necessary. The insulating gas is maintenance-free. Each panel module has a gas filling connector (fig see also section 6), through which the panel modules can be filled with gas, for instance in the case of repairs. The service pressure of the individual gas compartments is monitored by separate density sensors (temperature-compensated pressure sensors, fig ). A shortfall below the alarm signal level for insulation (120 kpa) or below the minimum filling pressure for switching (140 kpa) in a panel with three position switch disconnector and fuses is indicated on the protection and control unit or by signal lamp (fig ). Temporary operation of the panel at atmospheric pressure (> 100 kpa) is in principle possible if the SF 6 content of the insulating gas is at least 95 %. (Caution: A panel with three position switch disconnector and fuses may not be operated at less than the minimum filling pressure for switching (140 kpa), as the blowing of fuses leads to the tripping of the three position switch disconnector). Leakage testing of the gas compartments during manufacturing process The leakage rate of the gas compartments is determined by integral leakage testing: The block is placed in a test cabin. The block and the test cabin are evacuated. The gas compartment at the block are filled with helium. In this condition, the leakage rate is determined by measurement of the helium content in the test chamber. The helium is recovered after measurement, and the gas compartment is simultaneously evacuated. Finally, the panel module is automatically filled with SF 6 to the rated filling pressure for insulation (= 130 kpa at 20 C) or to the rated filling pressure for switching (= 150 kpa at 20 C) in the case of the panel with three position switch disconnector and fuses.this means that systems can only be filled with SF 6 when they have passed the leakage test. Fig : Signal lamp for gas density (used when the signal is not integrated in the protection device) 1 2 Technical catalogue ZX0.2 TK Revision 01 45

46 7.13 SF 6 density sensor Fig shows the function of the SF 6 density sensor. Between the measuring chamber and a reference chamber there is a moving mounting plate which operates electrical contacts. Temperature compensation The pressure in the monitored gas compartment rises with increasing temperature. As, however, the temperature in the reference chamber and thus the pressure of the reference volume increases to the same extent, this does not lead to any movement of the mounting plate. Self-supervision A drop in pressure of the reference volume results in a movement of the mounting plate (to the right in fig ). The self-supervision contact is operated. As the system is designed as a closed circuit, both wire breakages and defective plug and terminal connections are signalled as faults. Gas losses A loss of gas in the monitored gas compartment results in a drop in pressure in the measuring volume and thus a movement of the mounting plate (to the left in fig ). The contact for the pressure loss signal is operated. Two versions of SF 6 density sensors Two versions of the density sensors (figs and ) are used. 1. A common indication for gas loss, wire breakage, defective plug connection and defective pressure sensor for the reference volume. 2. Separate indications for a) gas loss, wire breakage and defective plug connection, and b) defective pressure sensor for the reference volume, wire breakage and defective plug connection. - Fig : Schematic diagram of the function of the SF 6 density sensor Monitored gas compartment 2 Measuring volume 3 Enclosed volume for temperature compensation (reference volume) 4 Mounting plate moved by interaction of forces (pressure of measuring volume against pressure of reference volume) 5 Contact for self-supervision (p > 150 kpa 1) ) 6 Contact for gas loss (p < 120 kpa 2) ) 5 3 Fig : Version 1 of the SF 6 density sensor Fig : Version 2 of the SF 6 density sensor a) > 150 kpa 1) Self-supervision < 120 kpa 2) < 150 kpa 1) > 150 kpa 1) < 120 kpa 2) > 120 kpa 2) < 150 kpa 1) Gas loss Self-supervision b) > 120 kpa 2) Gas loss 1) 170 kpa for panels with three position switch disconnector and fuses 2) 140 kpa for panels with three position switch disconnector and fuses 46 Technical catalogue ZX0.2 TK Revision 01

47 7.14 Pressure relief systems 8. Range of panels In the unlikely event of an internal arc fault in a gas compartment, the relevant pressure relief disk opens. In the case of wall mounting installation, the pressure created by a fault in the panel module or in the cable termination compartment is discharged upwards behind the switchgear system, and in the case of free-standing installation upwards through the pressure relief duct at the rear (fig ) Surfaces The gas-tight enclosures of the panel modules consist of stainless steel sheets. The cable termination compartments and low voltage compartments mechanism bays and busbar covers are manufactured from galvanised sheet steel. The following panel variants are available: Feeder panels Panels with circuit-breaker and three position disconnector Panels with three position switch disconnector and fuses Cable termination panels Sectionaliser Riser All the panels shown in section 8 are available as versions for free-standing and wall mounting installation. All the illustrations show the free-standing versions. The assignment of the panel variants to the relevant panel widths can be found in table 8.1. The low voltage compartment doors, the covers on the operator control areas, the cable termination compartment covers and end covers are coated with a powder stove enamel in RAL 7035 (light grey). Other colours for the painted parts are available on request. Fig : Pressure relief of the switchgear Table 8.1: Panel widths Panel variants Rated normal current Panel width [A] [mm] Feeder panel with three position switch disconnector and fuses Dependent on the fuses 600 Feeder panel Sectionaliser panel Riser panel Transfer panel Incomer panel Sectionaliser panel Riser panel Technical catalogue ZX0.2 TK Revision 01 47

48 8.1 Feeder panels Incoming and outgoing feeder panels with circuit-breaker Fig : Feeder panel with circuit-breaker 630 A Fig : Feeder panel with circuit-breaker 1250 A, voltage transformers (isolatable in the off-circuit condition) on the cables and plug-in voltage transformers on the busbars Fig : Feeder panel with circuit-breaker 2500 A, voltage transformers (isolatable in the off-circuit condition) on the cables and plug-in voltage transformers on the busbars Technical catalogue ZX0.2 TK Revision 01

49 or Current transformer 1) Voltage transformer, plug-in type 1) Capacitive voltage indicator system or Voltage transformer, isolatable Voltage transformer, plug-in type and isolatable Max. 3 cables per phase Max. 2 cables per phase + surge arrester Table : Overview of variants for incoming and outgoing feeder panels with circuit-breaker, I r up to 1250 A Panel width: 600 mm U r : I r : I p : kv A, A ka, ka 1) Either current transformers or voltage transformers Technical catalogue ZX0.2 TK Revision 01 49

50 or Current transformer 1) Voltage transformer, plug-in type 1) Capacitive voltage indicator system or Voltage transformer, isolatable Voltage transformer, plug-in type and isolatable Max. 6 cables per phase Max. 4 cables per phase + surge arrester 1) Either current transformers or voltage transformers Table : Overview of variants for incoming and outgoing feeder panels with circuit-breaker, I r over 1250 A and up to 2500 A Panel width: 1200 mm U r : I r : I p : kv A, A, A ka, ka 1) Either current transformers or voltage transformers 50 Technical catalogue ZX0.2 TK Revision 01

51 8.1.2 Feeder panels with three position switch disconnector and fuses Fig : Feeder panel with three position switch disconnector and fuses Current transformer 1) Voltage transformer, plug-in type 1) 1 cable per phase Table : Overview of variants for feeder panels with three position switch disconnector Panel width: 600 mm U r : I r : U r : I r :...12 kv...80 A...24 kv...63 A 1) Either current transformers or voltage transformers Technical catalogue ZX0.2 TK Revision 01 51

52 8.1.3 Cable termination panels Fig : Cable termination panel 1250 A Fig : Cable termination panel 2000 A or Current transformer 1) Voltage transformer, plug-in type 1) Capacitive voltage indicator system Current transformer Max. 3 cables per phase Max. 2 cables per phase + surge arrester Table : Overview of variants for cable termination panels, I r up to 1250 A Panel width: 600 mm U r : I r : I p : kv A ka, ka 1) Either current transformers or voltage transformers 52 Technical catalogue ZX0.2 TK Revision 01

53 or Current transformer Voltage transformer, plug-in type Capacitive voltage indicator system Current transformer Max. 6 cables per phase Max. 4 cables per phase + surge arrester Table : Overview of variants for cable termination panels, I r up to 2500 A Panel width: 1200 mm U r : I r : I p : kv A, A, A ka 1) Either current transformers or voltage transformers Technical catalogue ZX0.2 TK Revision 01 53

54 8.2 Busbar sectionaliser and riser panels Couplings within a switchgear block A sectionaliser and a riser panel are required for the implementation of bus couplings. In addition, a transfer panel containing a circuit-breaker and a three position disconnector is also available. Bus couplings can be integrated in a switchgear block. The riser and sectionaliser panels are connected by a solid insulated bar below the panel module. Couplings between two system blocks can be effected by means of cables. Sectionaliser panels are equipped with a combination of circuitbreaker and three position disconnector. Riser panels contain a three position disconnector. The current transformer is located on the solid insulated bar below the panel module. Sectionaliser and riser panels can be fitted with voltage transformers for busbar measurement. The installation variants sectionaliser left riser right and vice versa are possible. A riser panel can be installed at the end of the switchgear system for future extension without interruptions. Fig : Sectionaliser panel 1250 A Fig : Riser panel 1250 A Fig : Sectionaliser panel 1600 A Fig : Riser panel 1600 A Technical catalogue ZX0.2 TK Revision 01

55 or Current transformer 1) Voltage transformer, plug-in type 1) Capacitive voltage indicator system Current transformer Table : Overview of variants for sectionaliser and riser panels for installation within a switchgear block Panel width: 2 x 600 mm U r : I r : I p : kv A ka, ka Panel width: 2 x 900 mm U r : I r : I p : kv A, A ka, ka 1) Either current transformers or voltage transformers Technical catalogue ZX0.2 TK Revision 01 55

56 8.2.2 Transfer panel The transfer panel contains a circuit-breaker and a three position disconnector. In this panel variant, the three position disconnector is located between the left-hand busbar section and the circuitbreaker. The bushings on the left-hand busbar section can be fitted with voltage transformers. Voltage transformers for voltage detection in the right-hand busbar section can be located on the busbar of the adjacent panel on the right. Current transformers can be positioned on the busbars of the adjacent panels Current transformer Voltage transformer, plug-in type Capacitive voltage indicator system Table : Transfer panel Panel width: 600 mm U r : I r : I p : kv kv A A ka ka 56 Technical catalogue ZX0.2 TK Revision 01

57 8.2.3 Couplings (Connection of two system blocks) Fig : Couplings by cables, example configuration with circuit-breaker, three position disconnectors and integrated busbar voltage measurement, 2500 A The overview of variants can be found in section 8.1. Table : Overview of variants for sectionaliser and riser panels (Connection of two system blocks) Panel width: 600 mm U r : I r : I p : kv A ka, ka Panel width: 1200 mm U r : I r : I p : kv A, A, A ka, ka Technical catalogue ZX0.2 TK Revision 01 57

58 9 Busbar earthing is earthed via the closed feeder disconnector and closed circuitbreaker downstream (see fig ). Earthing can also be effected similarly via a switch disconnector panel with cable termination. This section outlines the ways in which the busbar can be earthed. The details of these operations can be found in the relevant instruction manuals. 9.1 Earthing the busbar by means of an earthing set 9.2 Earthing the busbar by means of a sectionaliser and riser or bus coupler Earthing is effected by the three position disconnector and the circuit-breaker in a bus sectionaliser (see fig ). With the feeder earthed, the cable connectors can be fitted with an earthing set connected to the main earthing bar. The earthing sets considered suitable by the cable connector manufacturer for the type of connector concerned are to be used. The busbar Fig : Busbar earthing by earthing set Earthing set Fig : Busbar earthing by sectionaliser and riser 58 Technical catalogue ZX0.2 TK Revision 01

59 10. Building planning 10.1 Site requirements The switchgear can be installed on a concrete floor, or on a raised false floor. Concrete floor If the switchgear installation consists of several panel blocks, a foundation frame set into the floor topping is required. The foundation frame ensures that the necessary evenness and straightness tolerances at the base of the switchgear system are maintained. The foundation frame can be supplied by ABB. If the switchgear installation consists of a single panel block (without plug-in busbar connections), no foundation frame is required. Floor openings for power cables can be configured as cutouts for each panel, as continuous cutouts (one each for power and control cables) or as drill holes. The floor openings are to be free from eddy currents (drill holes for power cables three phase without ridges in between). False floor Below the switchgear, the supporting sections of the raised floor serve as a base for the panels. A foundation frame is not as a rule necessary. The floor panels must be fixed to the supporting frame of the false floor. Pressure stress on the switchroom With pressure relief inside the switchroom or to the cable basement, a pressure rise in the room can be expected in the highly unlikely event of an internal arc fault. This is to be taken into account when planning the building. The pressure rise can be calculated by ABB on request. Pressure relief openings in the switchroom may be necessary. Ventilation of the switchroom Lateral ventilation of the switchroom is recommended. Climate The specified temperature conditions according to IEC (> - 5 C) are to be ensured by room heaters if necessary. Service conditions The service conditions according to IEC for indoor switchgear are to be ensured. The ambient air is not significantly polluted by dust, smoke, corrosive and/or flammable gases, vapours or salt. The conditions of humidity are as follows: the average value of the relative humidity, measures over a period of 24 h, does not exceed 95 %: the average value of the water vapour pressure, over a period of 24 h, does not exceed 2.2 kpa; the average value of the relative humidity, over a period of one month, does not exceed 90 %; the average value of the water vapour pressure, over a period of one month, does not exceed 1,8 kpa. Heaters are to be fitted in the low voltage compartments to preclude condensation phenomena (outside the gas-tight enclosures) resulting from major rapid temperature fluctuations and corresponding humidity. The specified temperature conditions according to IEC (> -5 C) are also to be ensured by means of room heating. Technical catalogue ZX0.2 TK Revision 01 59

60 10.2 Space required Fig : Wall mounting installation, example of a single row installation (Top view, dimensions in mm) 50 1) 50 1) 1330 > 800 3) 5) 2) > 1500 > 100 > 800 6) Fig : Wall mounting installation, example of a double row installation (Top view, dimensions in mm) 50 1) 50 1) 1330 > ) 5) 2) > > 100 > 800 6) 1) End cover 2) Recommended minimum door height: 2550 mm 3) Conditions for a minimum clearance of 800 mm in front of the system: 1. The low voltage compartment doors close in the direction of the emergency exit. 2. No door holders are used, (see also IEC 61936). Note: A minimum clearance of 1500 mm in front of the panel is required for installation of a panel in an existing row. 4) Conditions for a minimum clearance of 1200 mm between the system blocks: 1 The low voltage compartment doors close in the direction of the emergency exit. 2. No door holders are used, (see also IEC 61936). A minimum clearance of 1500 mm between the system blocks is required for installation of panels in an existing row. If escape routes are provided at both ends of the system, we recommend a minimum clearance of 1700 mm between the system blocks. 5) Observe IEC with regard to the necessity to provide escape routes and emergency exits at both ends of the system when the system exceeds a certain length. 6) The width of the escape route can be reduced to 500 mm with a corresponding reduction in the IAC qualification as per table IEC provides for a distance of 300 mm between the indicators and the panel for arc fault testing. According to the standard, the frame with the mountings for the indicators has a depth of 500 mm, resulting in a minimum distance of 800 mm between the panels and the wall. With smaller distances, therefore, no statements can be made on accessibility at the side of the switchgear system. A minimum escape route width of 500 mm is recommended in IEC Technical catalogue ZX0.2 TK Revision 01

61 Fig : Free-standing installation, example of a single row installation (Top view, dimensions in mm) 50 1) 50 1) 1330 > 800 6) > 800 6) 1330 > ) 1330 > 800 6) > 800 3) > 100 5) Fig : Free-standing installation, example of a double row installation (Top view, dimensions in mm) 5) 5) 50 1) Operator side Operator side 2) > 800 6) 50 1) 2) > 1500 > 1500 > 100 5) > 800 6) 1) End cover 2) Recommended minimum door height: 2550 mm 3) Conditions for a minimum clearance of 800 mm in front of the system: 1. The low voltage compartment doors close in the direction of the emergency exit. 2. No door holders are used, (see also IEC 61936). Note: A minimum clearance of 1500 mm in front of the panel is required for installation of a panel in an existing row. 4) Conditions for a minimum clearance of 1200 mm between the system blocks: 1 The low voltage compartment doors close in the direction of the emergency exit. 2. No door holders are used, (see also IEC 61936). A minimum clearance of 1500 mm between the system blocks is required for installation of panels in an existing row. If escape routes are provided at both ends of the system, we recommend a minimum clearance of 1700 mm between the system blocks. 5) Observe IEC with regard to the necessity to provide escape routes and emergency exits at both ends of the system when the system exceeds a certain length. 6) The width of the escape route can be reduced to 500 mm with a corresponding reduction in the IAC qualification as per table IEC ) provides for a distance of 300 mm between the indicators and the panel for arc fault testing. According to the standard, the frame with the mountings for the indicators has a depth of 500 mm, resulting in a minimum distance of 800 mm between the panels and the wall. With smaller distances, therefore, no statements can be made on accessibility at the side of the switchgear system. A minimum escape route width of 500 mm is recommended in IEC Technical catalogue ZX0.2 TK Revision 01 61

62 10.3 Minimum aisle widths and emergency exits Table : IAC qualification on reduction of escape route widths to the minimum of 500 mm Escape route width at the side of the switchgear system [mm] Escape route width behind the switchgear system [mm] IAC - classification Wall mounting installation Free standing installation > AFL > AF > 800 > 800 AFLR > 800 > 500 AFL > 500 > 800 AFR > 500 > 500 AF Table : Recommended aisle widths (in front of the system) Aisle width in front of the switchgear system, single row installation Aisle width between the system blocks, two row installation [mm] [mm] > 800 (without door holders, doors close in the direction of the emergency exit) > 1200 (without door holders, doors close in the direction of the emergency exit) > 1100 (escape route width 500 mm with doors open) > 1500 (for installation of panels in an existing row) > 1500 (for installation of panels in an existing row) > 1700 (escape route width 500 mm with doors open on both sides) Aisles shall be at least 800 mm wide.... Space for evacuation shall always be at least 500 mm, even when removable parts or open doors, which are blocked in the direction of escape, intrude into the escape routes.... Exits shall be arranged so that the length of the escape route within the room... does not exceed 20 m.... If an operating aisle does not exceed 10 m, one exit is enough. An exit or emergency possibilities shall be provided at both ends of the escape route if its length exceeds 10 m.... The minimum height of an emergency door [possibly the 2 nd door] shall be mm [clear height] and the minimum clear opening 750 mm. 1) 10.4 Minimum room heights Fulfilment of the IAC qualification requires a clear ceiling height of min mm for the switchgear room. 1) IEC Technical catalogue ZX0.2 TK Revision 01

63 10.5 Concrete floor Floor openings Fig : Openings for cables, panel width 600 mm Fig : Openings for cables, panel width 1200 mm Outlines of the panel 1310 (1330) 1) Opening for cables 1310 (1330) 1) Fig : Floor openings for entry of secondary cables from below (optional) in sectionaliser and riser panels (panel width 600 mm or 900 mm) and in the transfer panel (panel width 600 mm) (1330) 1) (600) 1) Wallmounting: 1310 mm, free-standing installation: 1330 m 2) The opening is only necessary for cooling in sectionaliser panels for currents > 1600 A to 2500 A (panel width 900 mm). No opening is to be provided for the corresponding riser panel. Technical catalogue ZX0.2 TK Revision 01 63

64 Foundation frames Standard foundation frames of 600 mm width are available for all panel types (panel widths 600 mm, 900 mm and 1200 mm). When installing the foundation frame at site, observe the form and position tolerances stated in the order documents. Two frames are to be provided for panels of width 1200 mm, and three frames for panel width 2 x 900 mm (sectionaliser and riser > 1250 A). The foundation frames are fastened to the concrete floor and embedded in the floor topping. Fig : Foundation frame for panel width 600 mm Fig : Foundation frame for panel width 1200 mm (1330) (1330) Fig : Foundation frame 64 Technical catalogue ZX0.2 TK Revision 01

65 10.6 False floor Fig is an aid to planning of the false floor. The floor plates of the panels have L13 x 14 slots for fastening to the frame sections. Provide M8 threads or bore holes for screws M8 in the frame sections at the positions of the slots. Fig : False floor, planning aid 3 panels with a width of 600 mm or 2 panels with a width of 900 mm Panel width 1200 mm 1330 (1310) A max max Detail A 14 M 8 or bore hole 13 Outlines of the panel L13 x 14 slot in the floor plate of the panel M8 thread or bore hole for screw M8 in the frame section of the false floor Technical catalogue ZX0.2 TK Revision 01 65

66 10.7 Earthing of the switchgear Design of earthing systems with regard to touch voltage and thermal stress The earthing system for the station building and the earthing system for the switchgear are to be designed in accordance with IEC The switchgear system is to be fitted with a continuous copper earthing bar with a cross-section of 240 mm2 (ECuF30, 30 mm x 10 mm). The connection of this earthing bar to the station earthing system is to be effected in accordance with the above standards. The earthing system described in this section does not represent EMC-compliant earthing of the switchgear (EMC = electromagnetic compatibility). EMC-compliant earthing is achieved by additional measures which are explained in the following section. Limitation of the interference level within the switchgear system is supported by suitable measures as listed below. Separate laying of power, signal and control cables. Suitable screening and earthing of the equipment. Potential isolation: Galvanic isolation of the signal circuits at the system boundary. Equipotential bonding: For low-impedance connection of system or circuit sections between which the potential difference should be as low as possible. The earthing conductors of the cable screens should always be routed to the earthing bar in the shortest possible distance. The lengths of the external control cables should not exceed 200 m. With greater lengths, use for example interposing relays or optical fibre cables EMC-compliant earthing of the switchgear Electromagnetic compatibility (EMC) is to be planned from quantitative points of view. The interface requirements regarding emissions and immunity are to be stipulated for delimited areas (EMC zones). In the best possible case, these requirements can be met directly, i.e. with no additional action. If, however, the requirements are not fulfilled, additional action is necessary, and is in principle to be applied in the order of the interference source, coupling path and interference sink. It is useful to assess the hierarchical elements of a system, such as the complete plant equipment, room, cubicle assembly, rack assembly, circuit board, circuit section and component, with respect to their electromagnetic environments on the various levels. The design of the earthing system for the switchgear is of decisive importance for the EMC of the secondary equipment in the switchgear installation. Information on this can be found in IEC standard, section 9.5. According to IEC , the secondary equipment in the switchgear system must satisfy the requirements of section 6.9. It is then ensured that interference which is permissible under the terms of the standard does not impair the immunity to noise of the secondary equipment (see also Annex J of the standard IEC ). The measures are to be implemented in addition to the earthing system described in section Technical catalogue ZX0.2 TK Revision 01

67 Recommendations on configuration of the switchgear earthing We recommend that the switchgear be earthed as shown in figures and A ring consisting of 80 mm x 5 mm copper strip is to be located beneath the switchgear and connected at several points with a maximum spacing of 5 m to the earthing system of the building. The foundation frame, the main earthing bar in the panels and the earthing bar in the low voltage compartments are to be connected at multiple points to the ring located beneath the switchgear. Details on the use of materials and the number of connections can be found in figure and When planning the switchgear earthing, please observe the notes in sections und Fig : Earthing recommendation, schematic diagram showing the concrete floor 10 A A Technical catalogue ZX0.2 TK Revision 01 67

68 Fig : Earthing recommendation, plan view (section A-A of figure ) Legend to figures and Ring below the switchgear, material ECuF30, cross-section 80 mm x 5 mm 2 Several connections from (1) to the building earth at distances of max. 5 m, material ECuF30, cross-section 80 mm x 5 mm 3 Short-circuit proof earthing of the switchgear in both end panels and at least every third panel, material: ECuF30, cross-section: 30 mm x 10 mm 4 Low impedance earthing of the earthing bar in each low voltage compartment, material: tinned copper braid, cross-section: 20 mm x 3 mm, cross section: 20 mm x 3 mm 5 Low impedance earthing of the switchgear in each panel, material: tinned copper braid, cross-section: 20 mm x 3 mm, cross section: 20 mm x 3 mm 6 Earthing of the foundation frame, at least every third foundation frame, material: galvanised steel strip, cross-section: 30 mm x 3.5 mm 7 Outline of the panel 8 Foundation frame 9 Main earthing bar 10 Earthing bar in the low voltage compartment 11 Earthing point on the foundation frame 10.8 Panel weights Table : Panel weights Panel variants Panel width Rated normal current Weight, max [mm] [A] [kg] Feeder panel with three position switch disconnector and fuses 600 Dependent on the fuses 600 Feeder panel Sectionaliser panel Riser panel Transfer panel ( ) 800 Incomer panel Sectionaliser panel Riser panel Technical catalogue ZX0.2 TK Revision 01

69 11 Non-standard operating conditions Non-standard operating conditions may require special action. Our design team will be pleased to submit and implement technical proposals to fulfil your requirements. The non-standard operating conditions include in particular Site altitudes > 1000 m above sea level (Higher site altitude on request), Higher ambient air temperature (maximum > 40 C and maximum 24 h average > 35 C) (see fig. 11.1), Ambient air contaminated by dust, smoke, corrosive or flammable gases or salt. Seismic withstand capability The panels are tested to IEEE Std ). Climate With high humidity and/or major rapid temperature fluctuations, electrical heaters must be fitted in the low voltage compartments. Fig. 11.1: Relationship between ambient air temperature and current carrying capacity Current carrying capacity / A Panels with I r = 2500 A at 40 C Panels with I r = 2000 A at 40 C Panels with I r = 1250 A at 40 C Panels with I r = 630 A at 40 C Ambient air temperature / C 1) Additional measures required (on request) Technical catalogue ZX0.2 TK Revision 01 69

70 70 Technical catalogue ZX0.2 TK Revision 01

71 For your notes

72

73 ABB AG Calor Emag Medium Voltage Products Germany Ratingen Factory

74 Contact us For more information please contact: ABB AG Calor Emag Medium Voltage Products Oberhausener Strasse 33 Petzower Strasse Ratingen Werder (Havel) OT Glindow GERMANY GERMANY Phone: Fax: [email protected] Internet: Note: We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB AG does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents - in whole or in parts - is forbidden without prior written consent of ABB AG. Copyright 2010 ABB All rights reserved DEABB/PTPM 1VBA P0102 Printed in Germany ( )