Air-Insulated Medium-Voltage Compact Switchgears for Substations
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The new air-insulated DRIESCHER medium-voltagecompact switchgears are ideal for appli- cation in secondary substations without control aisles. They meet the user's specific requirements to the full and ensure a satisfactory power distribution.These new air-insulated medium-voltage com-pact switchgears have been designed to meet demands for flexibility, maximum levels in quali- ty and safety as well as maximum operating con- venience in the network control. > No need for gaseous or solid insulators > Environmental compatibility, also in the eventof a malfunction;there are no toxic reaction...

Rated voltageRated lightning impulse withstand voltage Rated short-time withstand voltageU > r kVkV kVsHz1275 28 Rated short-circuit duration Rated frequencyt > k 150 U > p f > r U > d Rated voltageRated lightning impulse withstand voltage Rated short-time withstand voltageU > r kVkV kVsHz2412550 Rated short-circuit duration Rated frequencyt > k 150 U > p f > r U > d Technical data for the installedswitchgear equipment Rated (operating) currentI Rated short-time currentI Rated peak currentI > r k p Switch-disconnetor H 27630 Aup to 20 kAup to 50 kA 4 >

Equipment The cable panels are equipped with an in-lineswitch-disconnector H 27 EK. Afuse switch-disconnector H 27 SEAor H 27 SuTisinstalled in the transformer feeder panel. The HV- HBC fuse mounting contacts have been turned through 90 to optimally use the available space (fuses can be pulled out towards the front).The compact switchgears can, of course, also beequipped with an earthing switch as well as with cur- rent and voltage transformers.The optimal interlocking of the devices practicallyrules out any incorrect operation.Earthing switches or spherical fixed points are avai-lable for...

optionalnot possible Switch-disconnectorEarthing switchCurrent transformerVoltage transformerH 27 EKH 27 SEA H 27 EKH 27 SEA > Rated voltage 12 kVՕRated (operating) current630 ARated isolation level 75 kV > Fig. 1:12 kV Compact switchgear in front and side view Fig. 2: 12 kV Compact switchgear - open Fuse switch-disconnector H 27 SEASwitch-disconnector H 27 EKWithdrawable plate Earthing switchSwitch-disconnector H 27 EKWithdrawable plateEarthing switch > 6 size="-2">

optionalnot possible Switch-disconnectorEarthing switchCurrent transformerVoltage transformer H 27 EK H 27 SEAH 27 EK H 27 SEA > Rated voltage 12 kVՕRated (operating) current630 ARated isolation level 75 kV > Fig. 3:12 kV Compact switchgear in front and side view Fig. 4: 12 kV Compact switchgear - open Fuse switch-disconnector H 27 SEAWithdrawable plate HV-HBC fuse Earthing switch Switch-disconnector H 27 EKWithdrawable plateEarthing switch > 7 size="-2">

optionalnot possible Switch-disconnectorEarthing switchCurrent transformerVoltage transformerH 27 EKH 27 SuTH 27 EKH 27 SuT Rated voltage 24 kVՕRated (operating) current630 ARated isolation level 125 kV > Fig. 5:24 kV Compact switchgear in front and side view Fig. 6: 24 kV Compact switchgear - open Fuse switch-disconnector H 27 SuTWithdrawable plate HV-HBC fuse Earthing switch Voltage transformerCurrent transformerSpherical terminal stud > 8 size="-2">

optionalnot possible Switch-disconnectorEarthing switchCurrent transformerVoltage transformerH 27 EKH 27 SuT H 27 EKH 27 SuT > Rated voltage 24 kVՕRated (operating) current630 ARated isolation level 125 kV > Fig. 7:24 kV Compact switchgear in front and side view Fig. 8: 24 kV Compact switchgear -open Fuse switch-disconnector H 27 SuTWithdrawable plateSwitch-disconnector H 27 EKHV-HBC fuse Earthing switchSwitch-disconnector H 27 EKWithdrawable plateEarthing switchSurge voltage protector > 9 size="-2">

Rated voltage 24 kVՕRated (operating) current630 ARated isolation level 125 kV > optionalnot possible Switch-disconnectorEarthing switchCurrent transformerVoltage transformerH 27 EKH 27 SEA > Fig. 9:24 kV Compact switchgear in front and side view Fig. 10: 24 kV Compact switchgear- open Fuse switch-disconnector H 27 SEAEarthing switch Withdrawable plate Voltage transformer Earthing switch Current transformer Switch-disconnector H 27 EKWithdrawable plateEarthing switchVoltage surge protector > 10 size="-2">