Type 8BK20 Switchgear up to 24 kv with Withdrawable Circuit-Breakers

Transcription

1 s Type 8BK20 Medium- Switchgear Catalog HA

2 Type 8BK20 Switchgear up to 24 kv Air-Insulated, Metal-Enclosed, Metal-Clad Single/Duplicate Busbar Contents Application, Features Typical uses 2 Personnel safety, Equipment reliability, operation 2 to 4 Technical Data Electrical data, dimensions 5 and 6 Installation details 6 and 7 Shipping details 8 Product Range Single busbar panels 9 to 11 Duplicate busbar panels 12 Electrical Design Basic panel design 13 Mechanical Design High-voltage section 14 to 18 Low-voltage section 19 Standards Standards, specifications, guidelines 20 to 22 Appendix Catalog index 23 Conditions of sale and delivery, 24 expt regulations, trademarks, dimensions A Medium- Switchgear Catalog HA Supersedes: Catalog HA Siemens AG 1999

3 Type 8BK20 Application Features Personnel safety 1 8BK20 switchgear with withdrawable circuit-breakers f indo installation is suitable f: Rated voltages from 7.2 kv to 24 kv Rated sht-circuit breaking currents from 31.5 ka to 50 ka Rated busbar nmal currents up to 4000 A Rated feeder nmal currents up to 4000 A Typical uses Power stations, transfmer stations and switching substations of public utilities Cement industry Automotive industry Iron and steelwks Switching operations with do closed Personnel safety is increased by: Opening and closing of the switching device In the disconnected connected position Mechanically electrically With the do closed Isolation by moving the withdrawable part, manually motized, with the do closed Verification of safe isolation from supply. Accding to VDE 0105, Part 1, there are three alternative methods: Closing of a make-proof earthing switch with the do closed Pole-by-pole testing with a capacitive voltage detect with the do closed Testing with conventional voltage testers to VDE 0681, Part 4, but with the do open Opening and closing of the make-proof earthing switch with the do closed On the feeder and on the busbar: manually Interlocking of do/ withdrawable part The do is incpated in the interlocking concept as follows: Opening is possible only when the withdrawable part is locked in the disconnected position. The withdrawable part can be moved from the disconnected to the service position only when the do is closed Rolling mills Mines Food and fiber industry Chemical industry Mineral oil industry Pipelines Offshe installations R-HA eps Electrochemicals Petrochemicals Railway power supplies Shipbuilding Diesel power stations Emergency power supplies 2 Siemens HA

4 Features Type 8BK20 Personnel safety Equipment reliability Protection against electric shock and ingress of solid feign bodies 8BK20 switchgear provides both external and internal protection. External protection is provided by Complete enclosure of the panels in all operating states Internal protection is provided by Internal metal compartmentalization with enfcedoperation shutters, optional arc-resistant version of the busbar compartment The inter-cubicle partitions; optional arc-resistant version Degree of protection Standard version IP4X/IP3XD. Higher degrees of protection, such as IP31D, IP50 and IP51, can be obtained by additional measures. Arc-tested sheet-steel enclosure compartmentalization 8BK20 switchgear has been tested in accdance with the relevant standards f resistance to accidental arcing to ensure: External protection (personnel safety) Optional resistance to internal arcing (exceeding the scope of the standards), i.e. the effects of an arc are limited as follows: Pressure-proof in relation to neighbing panels Pressure-proof from the withdrawable part the connection compartment to the busbar compartment (applicable to rated currents up to 2500 A only) Pressure-proof from the busbar compartment to the withdrawable part connection compartment (applicable to rated currents up to 2500 A only) Pressure switch Limits arc duration to a maximum of 100 ms Minimizes the damage and effects of an arc Recommended use with grading times >0.5 s A function check of the pressure switch is possible without interrupting operation Triggers the feeder circuitbreaker if the pressure switch responds Switchgear interlocking All interlocks are mechanical with preventive, key-operated access shutters, i.e.: Operating levers can only be inserted when the interlocking conditions are fulfilled This prevents impermissible overstraining of the interlocking mechanisms Electric strength Adequate electric strength of 8BK20 switchgear is assured by: Sufficiently large air gaps between phases and to earth Suitable electrode fm These design features allow all conduct insulation to be dispensed with entirely. Highest level of independence of climate and environment This is provided by: Ribbed insulats in cast resin, with high resistance to pollution Total enclosure under all operating conditions Maintenance Minimum maintenance efft is assured by: Total enclosure under all operating conditions Use of proven, maintenance-free vacuum switching devices Availability Easy procurement of parts f extensions and repairs through the use of: Standard insulats Standard instrument transfmers Standard vacuum switching devices Standard copper sections Detachable low-voltage compartment up to 15 kv with plug-in connection technology 1 8BK20 switchgear with withdrawable circuit-breakers Siemens HA

5 Type 8BK20 Features Operation 1 Moving a withdrawable part inside a panel Little efft is required by hand mot to move a withdrawable part inside a panel with the aid of: A spindle mechanism Ball-bearing rollers Moving a withdrawable part outside a panel A withdrawable part is light and easy to move outside a panel: With a central service truck (see also adjacent figures) Ready to use R-HA eps L1 L2 L3 -C 1 HA a eps U LE -C 2 -H Interlocking conditions The following operations can be carried out as soon as the following standard interlocking conditions have been met: Moving the withdrawable part from the disconnected to the connected position: Low-voltage connect plugged in High-voltage do closed 1 ) Circuit-breaker in the OPEN position Make-proof earthing switch in the OPEN position 1 ) By one man Without tools Regardless of flo surface Sequence f moving the withdrawable part Move the withdrawable part into the disconnected position Open the do Unplug the low-voltage connect Unlock the withdrawable part (unintentional removal of the withdrawable part is prevented by an additional interlock) Bring up the central service truck and lock it onto the panel (additional interlock is then overridden) Pull out the withdrawable part onto the truck as far as it will go (it cannot fall) Collapsed Central service truck R-HA eps Legend C1 Capacit integrated in current transfmer in post insulat C 2 Capacit of the connecting cables and of the voltage detect to earth H detect, plug-in ULE between conduct and earth Verification of safe isolation from supply Moving the withdrawable part from the connected to the disconnected position: Circuit-breaker in the OPEN position Operating the circuit-breaker: withdrawable part in the interlocked end position Operating the make-proof earthing switch: Withdrawable part in the interlocked disconnected position 1 ) Opening the high-voltage do: Withdrawable part in the interlocked disconnected position 1 ) Detach the central service truck and the withdrawable part from the panel Remote control Electric remote control, e.g. from a central control room, can be provided f the following functions: Moving a motized withdrawable part into the disconnected connected position Opening and closing of the switching device Local manual operation is always ensured. Central service truck f moving the withdrawable part Withdrawable part can be lowered to the flo Collapsible f space-saving stage Withdrawable part locks automatically onto the trunk Lifting arms can be cranked up to maximum heights 1200 mm f 7.2/12/15 kv installations 1430 mm f 17.5/24 kv installations Large, swiveling wheels Suitable f all withdrawable parts Verification of safe isolation from supply With a voltage detect confming to the LRM system (Low Resistance Modified) to E VDE 0682 Part 415: Pole-by-pole verification of safe isolation from supply Detect suitable f continuous operation Safe to touch Routine-tested Measuring system and voltage detect can be tested detect flashes when high voltage is applied 1) Additional interlocks that exceed the scope of VDE 0670 Part 6 IEC Siemens HA

6 Technical Data Type 8BK20 Electrical data Withdrawable vacuum circuit-breaker panel Disconnect-link panel Sectionalizer panel Busbar connection panel, types I and II Withdrawable vacuum switch panel Rated voltage kv ) Width mm Rated sht-time power-frequency withstand voltage kv Rated lightning impulse withstand voltage kv Rated sht-circuit breaking current max. ka Rated sht-time withstand current 1 s max. ka s max. ka Rated sht-circuit making current/ max. ka rated peak withstand current Rated nmal current of busbars max. A Rated nmal current of feeders max. A Rated voltage kv ) 17,5 24 Width mm Rated sht-time power-frequency withstand voltage kv Rated lightning impulse withstand voltage kv Rated sht-time withstand current 1 s max. ka 50/20 2 ) 150/20 2 ) 150/20 2 ) 25/16 2 ) 25/16 2 ) 3 s max. ka 40/20 2 ) 140/20 2 ) 140/20 2 ) 25/16 2 ) 25/16 2 ) Rated sht-circuit making current/ max. ka 25/50 2 ) 125/50 2 ) 125/50 2 ) 63/40 2 ) 63/40 2 ) rated peak withstand current Rated nmal current of busbars max. A Rated nmal current of feeders max. A Dimensions of HV HRC fuses mm Metering panel Rated voltage kv ) Width mm Rated sht-time power-frequency withstand voltage kv Rated lightning impulse withstand voltage kv Rated sht-time withstand current 1 s max. ka s max. ka Rated peak withstand current max. ka Rated nmal current of busbars max. A Earthing transfmer panel Rated voltage kv Width mm Rated sht-time power-frequency withstand voltage kv Rated lightning impulse withstand voltage kv Rated sht-time withstand current 1 s max. ka s max. ka Rated sht-circuit making current/ max. ka rated peak withstand current Rated nmal current of busbars max. A ) Please inquire about 17.5 kv with cresponding insulating capacity. 2) When used without HV HRC fuses. Siemens HA

7 Type 8BK20 Technical Data Dimensions Installation details 2 Panel dimensions Rated voltage kv ) Width mm Height Standard mm With additionally mm mounted low-voltage compartment With cable connection mm to the busbars With de- 20 ka mm flecting plates fitt- 25 ka mm ed to comply with criteria 1 to 6, f arc fault duration of 1s Depth Single Connection mm busbar at front, panel wall mounting 2 ) Connection mm at front, free-standing 2 ) Connection mm at rear, free-standing 2 ) Duplicate Back- mm ) ) ) busbar topanel back arrangement Room planning Pay attention to the infmation in the adjacent figures and tables f details of planning the switchgear room. Legend 1 8BK20 switchgear 2 Panel subdivision 3 Switchgear termination 4 Front operating aisle 5 Distance from wall 6 Building wall Useable internal dimensions of the low-voltage compartment Rated voltage kv ) Width mm Standard Width mm compartment Height mm Depth mm Additional Width mm top box Height mm Depth mm Useable internal height f high-voltage cables Distance between centers of lug hole and cable brackets. Rated voltage kv ) Width mm Standard Connection approx version at front mm Connection approx at rear mm Standard Connection approx version at front mm with deeper Connection approx. 800 bottom plate at rear mm ) Please inquire about 17.5 kv with cresponding insulating capacity. 2) See also section entitled Panel connection, page 19. 3) Depth of 3960 mm f rated sht-circuit breaking current of 50 ka. 6 Siemens HA

8 Technical Data Type 8BK20 Installation details Single-row and face-to-face arrangement HA a eps Room dimensions (min. room height 2800 mm 1 )) (see also adjacent tables) a c d 3 6 Con- Connec- Rear- Arrange- Dimension nec- tion com- mounted ment tion partment pressure a b c d posi- pressure relief duct tion relief mm mm mm mm Rated voltage 7.2/12/15 kv Front Downwards None Wall To rear None Wall Upwards With Wall/free ) Rear Upwards With Free Rated voltage 17.5/24 kv HA a eps Single-row arrangement (plan view) f single busbar installations b c d Front Downwards None Wall To rear None Wall Upwards With Wall/free Rear Upwards With Free Back-to-back arrangement Con- Connec- Rear- Arrange- Dimension nec- tion com- mounted ment tion partment pressure a c posi- pressure relief duct tion relief mm mm Rated voltage 7.2/12/15 kv 2 Front Upwards With Free c Rated voltage 17.5/24 kv Front Upwards With Free Face-to-face arrangement (plan view) f single and duplicate busbar installations d Flo loading HA a eps ) ) a c c a 260 2) Single busbar duplicate busbar panels in face-to-face arrangement Weight of each single panel Rated voltage 7.2/12/15 kv Fixing The switchgear can be fixed by: Bolting to the foundation rails Welding to the foundation rails Duplicate busbar panels in back-to-back arrangement, equipped with two circuit-breakers Weight 700 to 1200 kg 1400 to 2000 kg Rated voltage 17.5/24 kv 800 to 1000 kg 1600 to 2000 kg Foundation rail position The position of the foundation rails is fixed by fixing points in the base frame of the panels. Please inquire f further details. Back-to-back arrangement (plan view) f duplicate busbar installations 1) Please inquire if rooms are low. 2) Please inquire about 8BK20 systems up to 15 kv with a rated sht-circuit breaking current of 50 ka. 3) A 1200 mm wide operating aisle is needed to move the withdrawable part. 4) F switchgear with a rated sht-circuit breaking current of 50 ka at 7.2/12/15 kv only connection at front and with rear pressure relief duct is feasible. The rear distance from wall must be at least 500 mm. Termination walls at the sides f this distance from wall must be provided on site. Siemens HA

9 Type 8BK20 Technical Data Shipping details Transpt units The following facts should be taken into account when deciding on the size of transpt units to be employed: Transpt facilities on site Transpt dimensions and weights Size of building doways Transpt unit Rated voltage and width 7.2/12/15 kv 17.5/24 kv 800 mm 1000 mm Single busbar panels single panels max. 3 panels max. 3 panels of a duplicate busbar installation f face-to-face arrangement Duplicate busbar panels f back-to-back max. 2 double panels max. 2 double panels arrangement 2 Packing Destination Transpt by Type of packing Germany/ Road and Panels on pallets and open packing with polyethylene Europe rail sheets covering the panels Overseas Ship Panels on pallets in sealed crates with upper and lower polyethylene sheets, welded together, with desiccant bags and sealed wooded flo; max. stage: 6 months Transpt dimensions and weights Destination Rated Number of panels Dimensions, volumes and weights voltage per transpt Width Depth Height Volume Gross weight unit m m m m 3 approx.kg Germany and Europe Connection at front, without rear-mounted pressure relief duct 7.2/12/15 kv 1 panel panels panels /24 kv 1 panel panels panels Connection at front rear, with rear-mounted pressure relief duct 7.2/12/15 kv 1 panel panels panels /24 kv 1 panel panels panels Back-to-back arrangement 1 ) 7.2/12/15 kv 1 double panel double panels /24 kv 1 double panel double panels Overseas Connection at front, without rear-mounted pressure relief duct 7.2/12/15 kv 1 panel panels panels /24 kv 1 panel panels panels ) The gross weight increases by about 180 kg when there are 2 withdrawable circuit-breakers in a panel. The depth will be increased by 0.4 m f switchgear with rated sht-circuit breaking current of 50 ka at 7.2/12/15 kv. The volume will change accdingly. Connection at front rear, with rear-mounted pressure relief duct 7.2/12/15 kv 1 panel panels panels /24 kv 1 panel panels panels Back-to-back arrangement 1 ) 7.2/12/15 kv 1 double panel double panels /24 kv 1 double panel double panels Siemens HA

10 Product Range Type 8BK20 Single busbar panels Withdrawable panel Busbar Withdrawable parts Connection transfmer on busbars Withdrawable vacuum circuit-breaker Current transfmer Make-proof earthing switch on busbars Withdrawable vacuum circuit-breaker 1 ) and/ transfmer Bus riser Withdrawable vacuum switch and/ Make-proof earthing switch 3 Cable connection at top Disconnect link and/ Cable sealing ends 2 ) max. 4 x 500 mm 2 per phase Spur connection at top Bars HA a eps M Panel ventilation 1) See also page 19 f details of voltage measurement of the panel connection. 2) Details refer to conventional Siemens single-ce sealing ends f XLPE cables other makes with similar dimensions. Siemens HA

11 Type 8BK20 Product Range Single busbar panels Sectionalizer (Mirr-image arrangement also possible) Busbar Withdrawable panel Bus riser panel, type I Busbar Withdrawable parts Connection Withdrawable part Connection transfmer on busbars Withdrawable vacuum circuit-breaker Current transfmer Current transfmer Metering section transfmer on busbars Make-proof earthing switch on busbars Withdrawable vacuum circuit-breaker Make-proof earthing switch on busbars 3 HA a eps M Panel ventilation 1) Withdrawable vacuum switch Disconnect link Withdrawable panel Bus riser panel, type II Busbar Busbar Withdrawable parts Connection Connection transfmer on busbars Withdrawable vacuum circuit-breaker Current transfmer Current transfmer transfmer on busbars Make-proof earthing switch on busbars Withdrawable vacuum circuit-breaker transfmer Make-proof earthing switch on busbars 1) HA a eps M Panel ventilation Withdrawable vacuum switch Current transfmer and voltage transfmer Disconnect link transfmer and current transfmer 1) See also page 19 f details of voltage measurement of the panel connection. 10 Siemens HA

12 Product Range Type 8BK20 Single busbar panels Metering panel, withdrawable type Busbar Busbar connection panels Type I Busbar Withdrawable part Withdrawable part Connection transfmer on busbars Metering section transfmer on busbars Metering section Current transfmer Make-proof earthing switch on busbars Bus riser HA a eps Make-proof earthing switch on busbars and/ and/ transfmer Cable sealing ends, max. 4 x 500 mm 2 per phase 3 HA a eps Cable connection at top Bars Earthing transfmer panel Type II Busbar HA a eps transfmer on busbars Connection Current transfmer HA a eps Make-proof earthing switch on busbars and/ and/ transfmer Cable sealing ends, max. 12 x 500 mm 2 per phase Bars Siemens HA

13 Type 8BK20 Product Range Duplicate busbar panels 8BK20 duplicate busbar switchgear is assembled from the range of single busbar panels. They can be arranged either: Face-to-face Back-to-back Face-to-face arrangement Panels from the single busbar product range The two rows are linked by cables bars underneath the panels Bus coupling, comprising Withdrawable panel Busbar connection panel SS1 Withdrawable panel Withdrawable panel SS2 HA a eps 3 Back-to-back arrangement Panels from the single busbar product range Withdrawable panel SS1 Withdrawable panel SS2 The two rows are linked by bars inside the panels Bus coupling, comprising: Withdrawable panel, but only with current transfmer and a special bus coupling and riser panel Fittings on the busbars as f sectionalizing a single busbar installation HA a eps SS1 = Busbar system 1 SS2 = Busbar system 2 12 Siemens HA

14 Electrical Design Type 8BK20 Basic panel design Single busbar panel Single-row arrangement 1 Low-voltage compartment 2 Withdrawable vacuum circuit-breaker 3 Cable connection 4 transfmer 5 Make-proof earthing switch 6 Current transfmer 7 Busbars 8 Rear-mounted pressure relief duct (option) HA a eps Single-row arrangement Duplicate busbar panels Face-to-face arrangement 2 to 8: See above 9 Cable busbar connection between both panels underneath the installation (in the cable basement) 10 Special connection bracket Back-to-back arrangement 1 to 8: See above 11 Busbars between both panels within the enclosures 9 HA a eps 10 4 Face-to-face arrangement Withdrawable part in disconnected position Withdrawable part in connected position HA b eps 11 Back-to-back arrangement Siemens HA

15 Type 8BK20 Mechanical Design High-voltage section Frame Design Bolted steel profiles and sheets Rails f accommodating the withdrawable part Base cover optionally available R-HA eps Surface treatment Steel profiles and sheets galvanized Dos and front frame powder-coated, col grey (RAL 7032) Switchgear side walls powder-coated, col grey (RAL 7032) Steel profiles Rail f withdrawable part Panel with partition removed 5 Partitions Partitions isolate neighbing panels from one another Design Galvanized sheet steel With cutout f continuous busbars Bushing plate with cast resin bushings f transverse isolation of busbars optionally available R-HA eps Cutout f continuous busbars Degree of protection with respect to neighbing panels: IP4X/IP3XD Partition Optionally in an arcresistant design Panel with partition Pressure relief When the pressure relief flaps are opened, the excess pressure in the panel in the event of an arc occurring is dissipated. Design Galvanized sheet steel Locked to prevent unintentional opening from the outside Separate pressure relief flaps f busbar, withdrawable part and connection compartments R-HA25-227a eps Pressure relief flaps Panel with pressure relief flaps 14 Siemens HA

16 Mechanical Design Type 8BK20 High-voltage section Compartmentalization Design Bolted galvanized steel sheets subdivide the panel into Busbar compartment Withdrawable part compartment Connection compartment Degree of protection between the individual compartments: IP4X/IP3XD Thanks to integrated cuptype bushings, complete compartmentalization even when the withdrawable part is in the connected position Upper and lower mating contacts fixed in cup-type bushings Enfced operated metal shutters f opening closing the cup-type bushings when moving the withdrawable part Metal shutters can be locked when the withdrawable part is racked out Upper barrier (access to the busbar) lower barrier (access to the cable) can be unscrewed independently of one another Optional resistance to internal arcing of the busbar compartment R-HA eps Metal shutters opened (no operation) Withdrawable part compartment R-HA eps Metal shutters closed High-voltage do Inspection window (1) Pressure-proof F checking the withdrawable part position F reading off the CLOSED/OPEN position indicat of the switching device, of the operating cycle counter and of the closing spring charged indication Lock (2) F locking unlocking the high-voltage do (taking the interlocking conditions into account) with an interlocking key Hand crank opening Hand crank f charging the operating mechanism springs of the switching device Opening closes automatically Do handle After the lock has been unlocked, the do is opened by lifting is closed by lowering (taking the interlocking conditions into account) CLOSED/OPEN pushbutton of the switching device CLOSED/OPEN switching when the withdrawable part is in the connected position: When the do is closed, mechanically with pushbutton and tiltable extension mechanism f pushbutton actuation CLOSED/OPEN switching when the withdrawable part is in the disconnected position: When the do is closed mechanically by means of pushbuttons (direct actuation) Lever f tilting over the extension mechanism (see adjacent figure f operating principle) Openings f withdrawable part actuation F the hand crank f moving the withdrawable part (taking the interlocking conditions into account) F the interlocking key of the withdrawable part (same key as f the high-voltage do). R-HA25-112a eps HA eps High-voltage do (e.g. f panel with 3AH vacuum circuit-breaker) CLOSED/ OPEN Tiltable extension mechanism f pushbutton actuation Inspection window (1) f checking the withdrawable part position Lock (2) CLOSED/OPEN pushbuttons Do handle Lever f tilting over the extension mechanism Inspection window (1) f reading off the indicats Openings f withdrawable part actuation Opening f hand crank High-voltage do Operating mechanism box of the switching device Pushbutton actuation in the high-voltage do Extension mechanism Actuation of the pushbuttons on the switching device 5 Siemens HA

17 Type 8BK20 Mechanical Design High-voltage section 5 Busbars (commercially available flat copper) Busbar mounting On commercially available cast-resin insulats Busbars bolted, length accding to panel width Compartmentalization Metal compartmentalization to the withdrawable part and connection compartments with degree of protection IP4X/IP3XD Busbar compartment continuous throughout the entire installation, transverse compartmentalization with respect to neighbing panels possible Resistance to internal arcing of the busbar compartment optionally possible Insulation Busbar insulation not necessary because dielectric strength is also guaranteed without insulation Busbar insulation up to the upper mating contacts optionally possible Busbar (options) The following on the busbars shown in the adjacent figure with reference to the example of withdrawable vacuum circuitbreaker panels are optionally available without detrimentally influencing pressure relief: 4MR voltage transfmer Cast-resin insulated Up to 3 x one-pole 2 x two-pole Make-proof earthing switch Manually operated Optionally lockable electromagnetically locked Bus riser Rated nmal current in accdance with the max. rated nmal current of the busbar Connecting bars mounted on 3 post insulats Necessary bar duct can be modified Cable connection at top Max. 2 x 500 mm 2 singlece XLPE cables per phase 1 ) With cable connection compartment and cable brackets Spur panel connection at top Max. 2 x 500 mm 2 singlece XLPE cables per phase 1 ) Cable connection within the panel, with cable brackets R-HA eps Busbar compartment 1) Details refer to conventional Siemens sealing ends other makes with similar dimensions. 16 Siemens HA

18 Mechanical Design Type 8BK20 High-voltage section Panel connection Connection of cables bars to current transfmers post insulats Connection variants types of installation are as shown in the illustrations Earthing and shtcircuiting via earthing switch directly at the point of connection Fixed-mounted voltage transfmers within the current transfmer protection zone Panel connection (options) The following optional are available f panel connection accding to the relevant project planning documentation: Connection Connection of max. 4 x 500 mm 2 single-ce XLPE cables per phase with Siemens sealing ends other makes of similar size Or connections f plug-in, shock-proof sealing ends, including flo plate Or connection f bars: Flat copper bar with bushings, optionally with flo plate fully insulated bars including flo plate 4MA post-insulat current transfmers Cast-resin insulated Narrow design to DIN Max. 3 units R-HA eps Connection compartment 4MR voltage transfmers Cast-resin insulated Max. 3 x one-pole 2 x two-pole Fixed-mounted, without primary fuses Withdrawable, optionally with primary fuses, voltage pickoff on the circuit-breaker, automatic earthing of primary terminals isolation of secondary circuits during access to voltage transfmers Make-proof earthing switch Manually operated Additional to standard locking of earthing switch/withdrawable part, optionally lockable electromagnetically locked Surge arresters limiters Surge arresters f protecting the switchgear against external overvoltages Limiters f protecting the loads against switching overvoltages Max. 3 units HA a eps HA a eps Connection from front 5 Connection from rear Siemens HA

19 Type 8BK20 Mechanical Design High-voltage section Withdrawable vacuum circuit-breaker section (See page 5 f technical data) Fitted with a vacuum circuit-breaker featuring a spring sted-energy operating mechanism R-HA eps Chassis Carriage mechanism Withdrawable vacuum switch section (See page 5 f technical data) Fitted with a vacuum switch featuring a spring sted-energy operating mechanism Also optionally with HV HRC fuses R-HA eps Chassis Carriage mechanism 5 Withdrawable disconnect-link section (See page 5 f technical data) Perfms a disconnect function Fitted with copper links Locking preferably with a padlock Chassis R-HA eps Carriage mechanism Withdrawable metering section (See page 5 f technical data) Fitted with 4MR voltage transfmers, cast-resin insulated, Max. 3 x one-pole 2 x two-pole Chassis R-HA eps Also optionally with 6.3 A primary fuses Carriage mechanism 18 Siemens HA

20 Mechanical Design Type 8BK20 Low-voltage section Low-voltage compartment F accommodating the devices f protection, control, measuring and metering, e.g. bay controller SIPROTEC 4 type 7SJ62 Shock-proof partitioning from the high-voltage section Pressure-resistant partitioning from the highvoltage section Low-voltage compartment can be removed (only possible f installations up to 15 kv) thanks to plug-in ring and control cables Do optionally with inspection window Additional built-on lowvoltage compartment possible See page 6 f details of useful internal dimensions Low-voltage cables Withdrawable section control cables via 64-pole plug connect, flexible cables in a metal conduit Control cables of the panel are flexible and have metallic covers Connection from withdrawable part and panel wiring to the low-voltage compartment by means of 10-pole module connects Solid-state HMI (human-machine interface) Bay controller SIPROTEC 4 type 7SJ62 f control and protection Features 1 LCD f process and equipment data, e.g. f: Measuring and metering values Binary data f status of switchpanel and device Protection data General signals Alarm 2 Keys f navigation in menus and f entering values 3 Seven programmable LEDs with possible applicationrelated inscriptions, f indicating any desired process and equipment data 4 Four programmable function keys f frequently perfmed actions Do of the low-voltage compartment Bay controller SIPROTEC 4 type 7SJ R-HA25-098a eps R-HA25-291eps 5 Ring cables with plug-in connections between panels f installations up to 15 kv R-HA25-292eps Low-voltage compartment with (example) Siemens HA

21 Type 8BK20 Standards Standards, specifications, guidelines 6 Standards Type 8BK20 switchgear f indo installation complies with the following valid standards: IEC Standard VDE Standard IEC VDE 0670 Part 1000 IEC VDE 0670 Part 6 IEC VDE 0670 Part 6, Appendix AA Appendix AA IEC VDE 0670 Part 2 IEC VDE 0670 Part 301 IEC VDE 0670 Part 303 IEC VDE 0670 Parts 101 to 107 IEC E VDE 0682 Part 415 and EN (E) IEC VDE 0470 Part 1 IEC VDE 0111 In accdance with the harmonization agreement reached by the countries of the European Community, their national standards confm to IEC Service locations Type 8BK20 switchgear can be used as indo installation in accdance with VDE 0101 Outside lockable electrical service locations at places which are not accessible to the public. Enclosures of switchgear can only be removed with tools. Inside lockable electrical service locations. A lockable electrical service location is a place outdos indos that is reserved exclusively f housing electrical equipment and which is kept under lock and key. Access is restricted to authized personnel and persons who have been properly instructed in electrical engineering. Untrained unskilled persons may only enter under the supervision of authized personnel properly instructed persons. Definition Make-proof earthing switches are earthing switches that have a shtcircuit making capacity (VDE 0670 Part 2). Insulating capacity The insulating capacity is verified by testing the switchgear with rated values of sht-time power-frequency withstand voltage and impulse withstand voltage accding to VDE 0670 Part 1000 IEC (see adjacent table): Rated values are referred to sea level and to nmal atmospheric conditions (1013 h Pa, 20 C, 11 g/m 3 humidity in accdance with VDE 0111 and IEC ). The insulating capacity decreases with increasing altitude, but is not taken into account by the standards and specifications up to a site altitude of 1000 m. Rated sht-time power-frequency withstand voltage to be selected Rated lightning impulse withstand voltage to be selected Example Resistance to internal arc faults Tests f verifying resistance to internal arc faults should establish proper protection f operating personnel. Tests f resistance to internal arc faults can be agreed between the owner and manufacturer in accdance with VDE 0670 Part 6 IEC The tests must be perfmed in accdance with VDE 0670 Part 6, Appendix AA IEC , Appendix AA. Type 8BK20 switchgear confms to the criteria of the above standards and specifications Criteria 1 to 3 and 6 in the standard version Criteria 1 to 6 with additional measures Rated Rated sht-time power- Rated lightning impulse voltage frequency withstand voltage withstand voltage (rms) (rms) (peak) F Between F Between isolating phases and isolating phases and distances to earth distances to earth kv kv kv kv kv , , , Crection fact a m Site altitude above sea level Definitions of criteria: Criterion 1 Crectly secured dos, covers etc. do not open. Criterion 2 Parts which may cause a hazard do not fly off. Criterion 3 No holes in the freely accessible external parts of the enclosure as the result of burning in tearing open. Criterion 4 Vertically arranged indicats do not ignite. Criterion 5 Hizontally arranged indicats do not ignite. Criterion 6 The effectiveness of the earth connection must not be detrimentally influenced. F site altitudes above 1000 m, the adjacent crection fact a is recommended, depending on the actual site altitude above sea level. Rated sht-time power-frequency withstand voltage (VDE 0670 Part 1000/IEC ) 1.1 a Rated lightning impulse withstand voltage (VDE 0670 Part 1000/IEC ) 1.1 a Site altitude above sea level 3000 m Rated voltage of switchgear 12 kv Rated lightning impulse withstand voltage (VDE 0670 Part 1000/IEC ) 75 kv Rated lightning impulse withstand voltage to select = 75 kv = 93 kv Result: Accding to the above table, 17.5 kv switchgear should be selected. HA eps Resistance to internal arc faults can be provided over and above the requirements of the standards and specifications mentioned befe. 20 Siemens HA

22 Standards Type 8BK20 Standards, specifications, guidelines Current-carrying capacity Accding to VDE 0670 Part 6 Part 1000, IEC IEC , current-carrying capacities are referred to the following ambient temperatures: Maximum of 24-hour mean + 35 C Maximum + 40 C The current-carrying capacity of the panels and busbars depends on the ambient temperature outside the enclosure. In the enclosed panels, the current-carrying capacity can be partly reduced by the restricted ventilation. It can be increased by: Using a circuit-breaker with a higher rated current Through-ventilation, i.e. prodproof ventilation slits in the high-voltage do and in the top cover plate Fced ventilation, i.e. prodproof ventilation slits in the high-voltage do in conjunction with a fan on the top cover plate Withdrawable section positions There are three different positions f the withdrawable sections of type 8BK20 switchgear as defined in VDE 0670 Part 6 IEC : Service position In this position, the switching device establishes a connection between the busbars and the panel connection. The low-voltage connect is plugged in. Disconnected position In this position, segregation is ensured, i.e. arcing possible only against earth. The low-voltage connect can be either plugged in disconnected. Test position The low-voltage connect is plugged in. Climate and ambient conditions Type 8BK20 switchgear, if necessary with additional measures, can be used in the following climate classes and under the following ambient conditions: Ambient conditions Natural pollutants Chemically active pollutants Small animals Climate classes I1, I2, I3 The climate classes are based on IEC and IEC and are defined as follows: Climate class I1 Rooms in buildings with good thermal insulation high thermal capacity, heated cooled: nmally only the temperature is monited, e.g. in nmal living rooms, offices, shops, telecommunications exchanges, stage rooms f sensitive products. Conditions in switchgear rooms Climate class I2 Rooms in buildings with po thermal insulation low thermal capacity, heated cooled, without temperature moniting; heating cooling subject to failure over several days, e.g. unattended relays, booster transfmer stations, stables, mot vehicle repair shops, manufacturing rooms f unfinished products, hangars. Climate class I3 Rooms in buildings without significant thermal insulation and with low thermal capacity, neither heated n cooled, e.g. telephone booths, entrances of buildings, barns, lofts, unheated ste rooms, sheds, garages. Room climate 1 ) Ambient Relative Condensation Special ambient Additional affecting the temperature humidity conditions measures switchgear needed Climate class I to 5 to None None + 40 C 85% Climate class I2 25 to 10 to Occasionally None Yes + 55 C 100% once a month f 2 hours Blown sand, dust, small animals Yes Climate class I3 25 to 10 to Frequently None Yes + 70 C 100% once a day f 2 hours Blown sand, dust, small animals Yes Dripping water due to ceiling Yes condensation (not harmful) to VDE 0470 Part 1 IEC Areas subject Sulfur dioxide (SO2) 2 ppm Yes to chemical Hydrogen sulfide (H2S) 1 ppm Yes pollution Hydrochlic acid (HCl) 3 ppm Yes Ammonia (NH3) 15 ppm Yes Nitric oxides (NO2) 2 ppm Yes Chlide deposit (Cl ) (saline fog) 2 mg/dm 2 Yes 1) Based on IEC and IEC Siemens HA

23 Type 8BK20 Standards Standards, specifications, guidelines 6 Interlocks The following interlocks are specified by VDE 0670 Part 6 and IEC : The withdrawal engagement of a circuit-breaker, switch contact shall be impossible unless it is in the open position. The operation of a circuitbreaker, switch contact shall be impossible unless it is in the service, disconnected, removed, test earthing condition. It shall be impossible to close the circuit-breaker, switch contact in the service position unless it is connected to the auxiliary circuit, unless it is designed to open automatically without the use of an auxiliary circuit. The provision of additional alternative interlocks shall be subject to agreement between the manufacturer and user. The manufacturer shall give all necessary infmation on the character and function of interlocks. It is recommended that earthing switches having a sht-circuit making capacity less than the rated peak withstand current of the circuit should be interlocked with the associated disconnects. Apparatus installed in main circuits, the increct position of which can cause damage which are used f assuring isolating distances during maintenance wk, shall be provided with locking facilities (f example, provision f padlocks). Wherever possible, preference should be given to mechanical interlocks. Type 8BK20 switchgear fulfils other interlocking conditions over and above those mentioned here; see page 4. Protection against water, electric shock and ingress of solid feign bodies As detailed in VDE 0470 Part 1 IEC and VDE 0670 Part 6 type 8BK20 switchgear confms to the following degrees of protection: F panels without ventilation slits: Degree of protection Standard Optional Enclosure IP4X/ IP31D, IP3XD IP50, IP51 Compart- IP4X/ mentalization IP3XD F panels with prod-proof ventilation slits: Degree of protection Standard Optional Enclosure IP4X/ IP31D IP3XD Compart- IP4X/ mentalization IP3XD Refer to the adjacent table f explanations Standard Degree of protection Type of protection VDE 0670 Part 6 and IEC VDE 0470 Part 1 and IEC Shock-hazard protection Protected against approach to live parts and contact with moving parts by wires strips of thickness greater than 1 mm. Protection against water No specification. Feign-body protection Protection against ingress of solid feign bodies, diameter 2.5 mm. Protection against water No specification. Shock-hazard protection Protected against access to hazardous parts with a wire (test probe with a diameter of 1 mm, length 100 mm, must have an adequate clearance from hazardous parts). Feign-body protection Protected against ingress of solid feign bodies, diameter 2.5 mm. Protection against water Protected against ingress of vertically dripping water. Shock-hazard protection Protected against access to hazardous parts with a wire (test probe with a diameter of 1 mm, length 100 mm, must have an adequate clearance from hazardous parts). Feign-body protection Protected against ingress of solid feign bodies, dust-protected. Shock-hazard protection Protected against access to hazardous parts with a wire (test probe with a diameter of 1 mm, length 100 mm, must have an adequate clearance from hazardous parts). Protection against water Not protected. I P 4 X I P 3 X D I P 3 1 D I P 5 0 I P 5 1 Feign-body protection Protected against ingress of solid feign bodies, dust-protected. Shock-hazard protection Protected against access to hazardous parts with a wire (test probe with a diameter of 1 mm, length 100 mm, must have an adequate clearance from hazardous parts). Protection against water Protected against ingress of vertically dripping water. 22 Siemens HA

24 Please contact your Siemens Representative Catalog Index Type 8BK20 Catalog Index of the Power Transmission and Distribution Group (Medium- Division) Title Designation Order No. High- and Medium- Equipment High- Equipment (Above 52 kv) Overvoltage Protection HG 21 E50001-K1521-A101-A Surge Counting Devices f Surge Arresters HG 21.4 E50001-K1521-A401-A Medium- Equipment (High- Equipment up to 52 kv) 3AH Vacuum HG E50001-K1511-A111-A Components up to 24 kv f 3AH Vacuum HG E50001-K1511-A151-A TL Vacuum Contacts HG E50001-K1511-A211-A Disconnects and Earthing Switches HG E50001-K1511-A311-A NXACT Vacuum Circuit-Breaker Module HG E50001-K1511-A511-A Vacuum Switches, Switch-Disconnects, HV HRC Fuse HG 12 E50001-K1512-A101-A Switchgear Interlock Units, Control Valves, Compressed Air Systems HG 13 E86010-K1513-A101-A Overvoltage Protection HG 21 E50001-K1521-A101-A EH2 Surge Arresters HG E50001-K1521-A251-A EE2 Special-Purpose Surge Arresters f the Protection of Mots, Generats and Furnace Transfmers HG E50001-K1521-A271-A Insulats of Cast Resin (Excerpt) HG 22 E50001-K1522-A111-A Current and Transfmers HG 24 E50001-K1524-A101-A Air-Ced Reacts, High- Capacits HG 25 E86010-K1525-A101-A Medium- Switchgear Medium- Switchgear (High- Indo Distribution Switchgear) Metal-Enclosed Truck-Type Switchboards f Indo Installation 8BC1, 8BD1 HA 21 E86010-K1421-A101-A Type 8BK20 (Metal-Clad) HA E50001-K1425-A311-A Type 8BK40 Switchgear up to 17.5 kv/63 ka with Withdrawable HA E50001-K1425-A411-A Generat Circuit-Breaker Units up to 17.5 kv/80 ka, Type 8BK41 HA E50001-K1425-A511-A Type 8BJ50 * HA E50001-K1425-A711-A NXAIR Withdrawable Circuit-Breaker Module Switchgear up to 12 kv, Air-Insulated HA E50001-K1425-A811-A /38 kv Switchgear Vacuum, HA 26.1 Siemens Den Haag, Type 8BK20 Dept.CMS DMS Type 8BK30 Switchgear up to 12 kv with Draw-Out Vacuum Contacts HA E50001-K1427-A111-A Panels up to 36 kv with Fixed-Mounted, SF 6 -Insulated, Types 8DA10 and 8DB10 Single-Pole, Metal-Enclosed, Metal-Clad Single-Busbar Switchgear Duplicate-Busbar Switchgear HA E50001-K1535-A101-A Type 8DC11 Panels up to 24 kv, Fixed-Mounted Vacuum Circuit-Breaker Switchgear, SF 6 -Insulated HA E50001-K1435-A401-A NXPLUS Fixed-Mounted Circuit-Breaker Switchgear up to 36 kv, SF 6 -Insulated HA E50001-K1435-A511-A Spline-Shaft Drive 8UG f Tque Transmission up to 200 Nm HA 39.1 E86010-K1439-A111-A Mot Drive 8UH f Tque Requirements up to 250 Nm HA 39.3 E86010-K1439-A131-A Fixed-Mounted Ring-Main Units up to 24 kv, SF 6 -Insulated, Type 8DH10 HA E50001-K1441-A101-A Fixed-Mounted Ring-Main Units up to 24 kv, SF 6 -Insulated, Type 8DJ10 HA E50001-K1445-A111-A Secondary Distribution, SF 6 -Insulated, Type 8DJ20 HA E50001-K1445-A311-A Type 8FB1 Compact Transfmer Substations up to 24 kv HA 51.1 E50001-K1451-A111-A Facty-Built Container Stations, Type 8FF1 HA 52.1 E50001-K1452-A111-A A Siemens HA

25 Type 8BK20 Appendix Conditions of Sale and Delivery Subject to the General Conditions of Supply and Delivery f Products and Services of the Electrical and Electronic Industry and to any other conditions agreed upon with the recipients of catalogs. The technical data, dimensions and weights are subject to change unless otherwise stated on the individual pages of this catalog. The illustrations are f reference only. We reserve the right to adjust the prices and shall charge the prices applying on the date of delivery. A En 1.91a Expt Regulations Trademarks Dimensions In accdance with present provisions of the German Expt List and the US Commercial Control List, expt licences are not required f the products listed in this catalog. An expt licence may however be required due to country-specific application and final destination of the products. Relevant are the expt criteria stated in the delivery note and the invoice subject to a possible expt and reexpt licence. Subject to change without notice. All product designations used are trademarks product names of Siemens AG of other suppliers. All dimensions in this catalog are given in mm. A Responsible f Technical contents: Dieter Jahn, Siemens AG, Dept. EV MS1 VM, Erlangen General editing: Gabriele Pollok, Siemens AG, Dept. EV BK T, Erlangen 24 Siemens HA This edition cresponds to the 1998 German edition. Printed in Germany KGK En /U827

26 Central Office: Electrokavir Co. Under License of SIEMENS KAVIR Bldg. No. 374 Mirdamad Ave, TEHRAN IRAN _ P.O. Box: Tel: (10Line), , , , Fax: Web: [email protected] Facty: KHEZRABAD, YAZD - IRAN Tel: Fax: Bereich Energieübertragung und -verteilung Geschäftsgebiet Mittelspannung Postfach D Erlangen Siemens Aktiengesellschaft Order No.: E50001-K1425-A311-A6-7600