s Type 8BK20 Medium- Switchgear Catalog HA 25.21 1999
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 1 2 3 4 5 6 A Medium- Switchgear Catalog HA 25.21 1999 Supersedes: Catalog HA 25.21 1995 Siemens AG 1999
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-HA25-286 eps Electrochemicals Petrochemicals Railway power supplies Shipbuilding Diesel power stations Emergency power supplies 2 Siemens HA 25.21 1999
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 25.21 1999 3
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-HA25-284 eps L1 L2 L3 -C 1 HA25-2491a 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-HA25-285 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 60 298. 4 Siemens HA 25.21 1999
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 7.2 12 15 1 ) 17.5 24 Width mm 1800 1800 1800 1000 1000 Rated sht-time power-frequency withstand voltage kv 1120 1128 1136 1138 1150 Rated lightning impulse withstand voltage kv 1160 1175 1195 1195 1125 Rated sht-circuit breaking current max. ka 1150 1150 1150 1125 1125 Rated sht-time withstand current 1 s max. ka 1150 1150 1150 1125 1125 3 s max. ka 1140 1140 1140 1125 1125 Rated sht-circuit making current/ max. ka 1125 1125 1125 1163 1163 rated peak withstand current Rated nmal current of busbars max. A 4000 4000 4000 2500 2500 Rated nmal current of feeders max. A 4000 4000 4000 2000 2000 Rated voltage kv 7.2 12 15 1 ) 17,5 24 Width mm 1800 1800 1800 1000 1000 Rated sht-time power-frequency withstand voltage kv 1120 1128 1136 1138 1150 Rated lightning impulse withstand voltage kv 1160 1175 1195 1195 1125 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 4000 4000 4000 2500 2500 Rated nmal current of feeders max. A 1630 1630 1630 1630 1630 Dimensions of HV HRC fuses mm 1292 1292 1292 1442 1442 2 Metering panel Rated voltage kv 7.2 12 15 1 ) 17.5 24 Width mm 1800 1800 1800 1000 1000 Rated sht-time power-frequency withstand voltage kv 1120 1128 1136 1138 1150 Rated lightning impulse withstand voltage kv 1160 1175 1195 1195 1125 Rated sht-time withstand current 1 s max. ka 1150 1150 1150 1125 1125 3 s max. ka 1140 1140 1140 1125 1125 Rated peak withstand current max. ka 1125 1125 1125 1163 1163 Rated nmal current of busbars max. A 4000 4000 4000 2500 2500 Earthing transfmer panel Rated voltage kv 7.2 12 Width mm 1800 1800 Rated sht-time power-frequency withstand voltage kv 1120 1128 Rated lightning impulse withstand voltage kv 1160 1175 Rated sht-time withstand current 1 s max. ka 1150 1150 3 s max. ka 1140 1140 Rated sht-circuit making current/ max. ka 1125 1125 rated peak withstand current Rated nmal current of busbars max. A 4000 4000 1) Please inquire about 17.5 kv with cresponding insulating capacity. 2) When used without HV HRC fuses. Siemens HA 25.21 1999 5
Type 8BK20 Technical Data Dimensions Installation details 2 Panel dimensions Rated voltage kv 7.2 12 15 1 ) 17.5 24 Width mm 1800 1800 1800 1000 1000 Height Standard mm 2050 2050 2050 2250 2250 With additionally mm 2450 2450 2450 2650 2650 mounted low-voltage compartment With cable connection mm 2550 2550 2550 2750 2750 to the busbars With de- 20 ka mm 2050 2050 2050 2530 2530 flecting plates fitt- 25 ka mm 2450 2450 2450 2530 2530 ed to comply with criteria 1 to 6, f arc fault duration of 1s Depth Single Connection mm 1650 1650 1650 2025 2025 busbar at front, panel wall mounting 2 ) Connection mm 1775 1775 1775 2150 2150 at front, free-standing 2 ) Connection mm 1775 1775 1775 2150 2150 at rear, free-standing 2 ) Duplicate Back- mm 3560 3 ) 3560 3 ) 3560 3 ) 4310 4310 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 7.2 12 15 1 ) 17.5 24 Width mm 800 800 800 1000 1000 Standard Width mm 680 680 680 1880 1880 compartment Height mm 680 680 680 1680 1680 Depth mm 450 450 450 1450 1450 Additional Width mm 680 680 680 1880 1880 top box Height mm 380 380 380 1380 1380 Depth mm 420 420 420 1420 1420 Useable internal height f high-voltage cables Distance between centers of lug hole and cable brackets. Rated voltage kv 7.2 12 15 1 ) 17.5 24 Width mm 800 800 800 1000 1000 Standard Connection approx. 425 425 425 1520 1520 version at front mm Connection approx. 600 600 600 1650 1650 at rear mm Standard Connection approx. 625 625 625 1720 1720 version at front mm with deeper Connection approx. 800 bottom plate at rear mm 800 800 1850 1850 1) 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 25.21 1999
Technical Data Type 8BK20 Installation details Single-row and face-to-face arrangement HA25-2492a eps Room dimensions (min. room height 2800 mm 1 )) (see also adjacent tables) 33 100 1 4 2 33 50 5 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 1100 1300 1650 150 To rear None Wall 1100 1300 1650 150 Upwards With Wall/free 1100 1300 1775 50 4 ) Rear Upwards With Free 1100 1300 1775 500 Rated voltage 17.5/24 kv HA25-2493a eps Single-row arrangement (plan view) f single busbar installations 33 100 50 33 4 33 50 100 33 b c d Front Downwards None Wall 1400 1500 2025 150 To rear None Wall 1400 1500 2025 150 Upwards With Wall/free 1400 1500 2150 50 Rear Upwards With Free 1400 1500 2150 500 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 1100 1650 c Rated voltage 17.5/24 kv Front Upwards With Free 1400 2025 Face-to-face arrangement (plan view) f single and duplicate busbar installations d Flo loading HA25-2494a eps 4 33 100 3) 4 33 100 3) 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 25.21 1999 7
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 1.06 1.90 2.25 14.53 1770 2 panels 1.90 1.90 2.25 18.12 1540 3 panels 2.66 1.90 2.25 11.37 2300 17.5/24 kv 1 panel 1.26 2.27 2.45 17.00 1100 2 panels 2.27 2.27 2.45 12.63 2200 3 panels 3.26 2.27 2.45 18.13 3250 Connection at front rear, with rear-mounted pressure relief duct 7.2/12/15 kv 1 panel 1.06 2.08 2.25 14.96 1770 2 panels 1.90 2.08 2.25 18.90 1530 3 panels 2.66 2.08 2.25 12.48 2300 17.5/24 kv 1 panel 1.26 2.44 2.45 17.53 1100 2 panels 2.27 2.44 2.45 13.57 2200 3 panels 3.26 2.44 2.45 19.50 3250 Back-to-back arrangement 1 ) 7.2/12/15 kv 1 double panel 1.06 4.00 2.30 19.75 1390 2 double panels 1.90 4.00 2.30 17.48 2780 17.5/24 kv 1 double panel 1.26 4.70 2.55 15.10 2050 2 double panels 2.27 4.70 2.55 27.10 4100 Overseas Connection at front, without rear-mounted pressure relief duct 7.2/12/15 kv 1 panel 1.06 1.90 2.41 14.85 1050 2 panels 1.90 1.90 2.41 18.65 1880 3 panels 2.66 1.90 2.41 12.15 2730 17.5/24 kv 1 panel 1.26 2.27 2.61 17.65 1450 2 panels 2.27 2.27 2.61 13.44 2650 3 panels 3.26 2.27 2.61 19.31 3860 1) 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 1.06 2.08 2.41 15.31 1080 2 panels 1.90 2.08 2.41 19.47 1930 3 panels 2.66 2.08 2.41 13.30 2770 17.5/24 kv 1 panel 1.26 2.44 2.61 18.03 1500 2 panels 2.27 2.44 2.61 14.44 2700 3 panels 3.26 2.44 2.61 20.74 3900 Back-to-back arrangement 1 ) 7.2/12/15 kv 1 double panel 1.06 4.00 2.46 10.43 1950 2 double panels 1.90 4.00 2.46 18.70 3460 17.5/24 kv 1 double panel 1.26 4.70 2.70 16.00 2750 2 double panels 2.27 4.70 2.70 28.81 5000 8 Siemens HA 25.21 1999
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 HA25-2515a 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 25.21 1999 9
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 HA25-2516a 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) HA25-2517a 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 25.21 1999
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 HA25-2520a eps Make-proof earthing switch on busbars and/ and/ transfmer Cable sealing ends, max. 4 x 500 mm 2 per phase 3 HA25-2518a eps Cable connection at top Bars Earthing transfmer panel Type II Busbar HA25-2519a eps transfmer on busbars Connection Current transfmer HA25-2521a eps Make-proof earthing switch on busbars and/ and/ transfmer Cable sealing ends, max. 12 x 500 mm 2 per phase Bars Siemens HA 25.21 1999 11
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 HA25-2523a 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 HA25-2524a eps SS1 = Busbar system 1 SS2 = Busbar system 2 12 Siemens HA 25.21 1999
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) 8 7 6 5 HA25-2525a eps 1 2 3 4 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 HA25-2537a eps 10 4 Face-to-face arrangement Withdrawable part in disconnected position Withdrawable part in connected position HA25-2538b eps 11 Back-to-back arrangement Siemens HA 25.21 1999 13
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-HA25-096 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-HA25-097 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 25.21 1999
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-HA25-224 eps Metal shutters opened (no operation) Withdrawable part compartment R-HA25-225 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 25-2539 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 25.21 1999 15
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-HA25-294 eps Busbar compartment 1) Details refer to conventional Siemens sealing ends other makes with similar dimensions. 16 Siemens HA 25.21 1999
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 42600 Max. 3 units R-HA25-295 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 HA25-2547a eps HA25-2548a eps Connection from front 5 Connection from rear Siemens HA 25.21 1999 17
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-HA25-228 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-HA25-229 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-HA25-231 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-HA25-232 eps Also optionally with 6.3 A primary fuses Carriage mechanism 18 Siemens HA 25.21 1999
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 7SJ62 1 2 3 4 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 25.21 1999 19
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 60 694 VDE 0670 Part 1000 IEC 60 298 VDE 0670 Part 6 IEC 60 298 VDE 0670 Part 6, Appendix AA Appendix AA IEC 60 129 VDE 0670 Part 2 IEC 60 265-1 VDE 0670 Part 301 IEC 60 420 VDE 0670 Part 303 IEC 60 056 VDE 0670 Parts 101 to 107 IEC 61243-5 E VDE 0682 Part 415 and EN 61243-5 (E) IEC 60 529 VDE 0470 Part 1 IEC 60 071 VDE 0111 In accdance with the harmonization agreement reached by the countries of the European Community, their national standards confm to IEC 60 298. 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 60 694 (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 60 071). 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 60 298. The tests must be perfmed in accdance with VDE 0670 Part 6, Appendix AA IEC 60 298, 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 17.2 23 20 170 160 12,0 32 28 185 175 15,0 39 36 105 195 17.5 45 38 110 195 24,0 60 50 145 125 Crection fact a 1 0.9 0.8 0.7 0.6 0.1 0 0 m 1000 2000 3000 4000 5000 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 60 694) 1.1 a Rated lightning impulse withstand voltage (VDE 0670 Part 1000/IEC 60 694) 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 60 694) 75 kv Rated lightning impulse withstand voltage to select = 75 kv = 93 kv 1.1 0.73 Result: Accding to the above table, 17.5 kv switchgear should be selected. HA25-2503 eps Resistance to internal arc faults can be provided over and above the requirements of the standards and specifications mentioned befe. 20 Siemens HA 25.21 1999
Standards Type 8BK20 Standards, specifications, guidelines Current-carrying capacity Accding to VDE 0670 Part 6 Part 1000, IEC 60 298 IEC 60 694, 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 60 298: 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 60 721-3-3 and IEC 60 721-3-4 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 I1 + 15 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 60 529 6 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 60 721-3-3 and IEC 60 721-3-4. Siemens HA 25.21 1999 21
Type 8BK20 Standards Standards, specifications, guidelines 6 Interlocks The following interlocks are specified by VDE 0670 Part 6 and IEC 60 298: 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 60 298 and 60 529 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 60 298 VDE 0470 Part 1 and IEC 60 529 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 25.21 1999
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-A1-7600 Surge Counting Devices f Surge Arresters HG 21.4 E50001-K1521-A401-A1-7600 Medium- Equipment (High- Equipment up to 52 kv) 3AH Vacuum HG 11.11 E50001-K1511-A111-A3-7600 Components up to 24 kv f 3AH Vacuum HG 11.15 E50001-K1511-A151-A1-7600 3TL Vacuum Contacts HG 11.21 E50001-K1511-A211-A1-7600 Disconnects and Earthing Switches HG 11.31 E50001-K1511-A311-A1-7600 NXACT Vacuum Circuit-Breaker Module HG 11.51 E50001-K1511-A511-A1-7600 Vacuum Switches, Switch-Disconnects, HV HRC Fuse HG 12 E50001-K1512-A101-A4-7600 Switchgear Interlock Units, Control Valves, Compressed Air Systems HG 13 E86010-K1513-A101-A1-7600 Overvoltage Protection HG 21 E50001-K1521-A101-A1-7600 3EH2 Surge Arresters HG 21.2.5 E50001-K1521-A251-A3-7600 3EE2 Special-Purpose Surge Arresters f the Protection of Mots, Generats and Furnace Transfmers HG 21.2.7 E50001-K1521-A271-A3-7600 Insulats of Cast Resin (Excerpt) HG 22 E50001-K1522-A111-A1-7600 Current and Transfmers HG 24 E50001-K1524-A101-A2-7600 Air-Ced Reacts, High- Capacits HG 25 E86010-K1525-A101-A4-7600 Medium- Switchgear Medium- Switchgear (High- Indo Distribution Switchgear) Metal-Enclosed Truck-Type Switchboards f Indo Installation 8BC1, 8BD1 HA 21 E86010-K1421-A101-A3-7600 Type 8BK20 (Metal-Clad) HA 25.21 E50001-K1425-A311-A6-7600 Type 8BK40 Switchgear up to 17.5 kv/63 ka with Withdrawable HA 25.31 E50001-K1425-A411-A2-7600 Generat Circuit-Breaker Units up to 17.5 kv/80 ka, Type 8BK41 HA 25.41 E50001-K1425-A511-A1-7600 Type 8BJ50 * HA 25.61 E50001-K1425-A711-A2-7600 NXAIR Withdrawable Circuit-Breaker Module Switchgear up to 12 kv, Air-Insulated HA 25.71 E50001-K1425-A811-A1-7600 36/38 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 27.11 E50001-K1427-A111-A2-7600 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 35.11 E50001-K1535-A101-A6-7600 Type 8DC11 Panels up to 24 kv, Fixed-Mounted Vacuum Circuit-Breaker Switchgear, SF 6 -Insulated HA 35.41 E50001-K1435-A401-A3-7600 NXPLUS Fixed-Mounted Circuit-Breaker Switchgear up to 36 kv, SF 6 -Insulated HA 35.51 E50001-K1435-A511-A1-7600 Spline-Shaft Drive 8UG f Tque Transmission up to 200 Nm HA 39.1 E86010-K1439-A111-A2-7600 Mot Drive 8UH f Tque Requirements up to 250 Nm HA 39.3 E86010-K1439-A131-A1-7600 Fixed-Mounted Ring-Main Units up to 24 kv, SF 6 -Insulated, Type 8DH10 HA 41.11 E50001-K1441-A101-A2-7600 Fixed-Mounted Ring-Main Units up to 24 kv, SF 6 -Insulated, Type 8DJ10 HA 45.11 E50001-K1445-A111-A6-7600 Secondary Distribution, SF 6 -Insulated, Type 8DJ20 HA 45.31 E50001-K1445-A311-A1-7600 Type 8FB1 Compact Transfmer Substations up to 24 kv HA 51.1 E50001-K1451-A111-A2-7600 Facty-Built Container Stations, Type 8FF1 HA 52.1 E50001-K1452-A111-A1-7600 A Siemens HA 25.21 1999 23
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 25.21 1999 This edition cresponds to the 1998 German edition. Printed in Germany KGK 1.99 16. 24 En 100857 6101/U827
Central Office: Electrokavir Co. Under License of SIEMENS KAVIR Bldg. No. 374 Mirdamad Ave, TEHRAN 15189 - IRAN _ P.O. Box: 15189-65514 Tel: +98 21 88677210 (10Line), 88788125, 88796486, 88783156, Fax: +98 21 88789448 Web: www.electrokavir.com Email: info@electrokavir.com Facty: KHEZRABAD, YAZD - IRAN Tel: +98 351 7272974-6 Fax: +98 351 7272386 Bereich Energieübertragung und -verteilung Geschäftsgebiet Mittelspannung Postfach 32 20 D-91050 Erlangen http://www.ev.siemens.de Siemens Aktiengesellschaft Order No.: E50001-K1425-A311-A6-7600