Page 19 - YINGMING POWER(HIGH & LOW VOLTAGE SWITCHGEARS)

SRM6-12(C，V，F.R)
GAS INSULATED METAL ENCLOSED
SWITCHGEAR YINGMING POWER
Conditions of Use

◆ Ambient air temperature: -40℃ ~ +40℃ , daily temperature difference: not more than 35℃ ;
◆ The altitude should not exceed 4000m (please specify when the altitude of the equipment exceeds 1000m)!
◆ The surrounding air is not polluted by corrosive gases and/or combustible or explosive gases, and there is no severe impact in the installation place;
◆ The pollution level does not exceed Grade III as specified in GB/T5582;
◆ Earthquake resistance: 8 degrees;
◆ The amplitude of electromagnetic interference induced in the secondary system does not exceed 1.6kV;
◆ Special use conditions: If it is different from the above normal use conditions, the user needs to negotiate with the manufacturer to obtain a
consensus.

The main technical parameters
Combined Circuit breaker
project Unit Load switch
electrical unit unit
Rated voltage kV 12/24
Rated frequency Hz 50/60

Main busbar rated current A 630 , 1250
Rated current A 630 125 630、1250
Rated short-circuit breaking current kA 31.5 20、25/30
Rated short circuit closing current (peak) kA 50 80 50、63
Main circuit 4s / ground circuit 4s 20 20、25
Rated short-time withstand current kA
Ground connection circuit 4s 17.4 17.4、21.7
Main circuit / ground circuit 50 50、 63
Rated peak withstand current kA
Ground connection loop 43.5 43.5、54.6
Rated transfer current A 1750(12kV)/1400(24kV)

Breaking and closing ability E3 level E2 level
Relatively 42(12kV)/65(24kV)
1min power frequency
withstand voltage
Rated Vacuum fracture, isolation fracture 48(12kV)/79(24kV)
insulation kV
level Relatively 75(12kV)/125(24kV)
Lightning impulse withstand
voltage (peak)
Vacuum fracture, isolation fracture 85(12kV)/145(24kV)
Auxiliary circuit 1min power frequency withstand voltage kV 2
to back capacitor bank breaking current A 400

Rated capacitor bank kA 20(50Hz)
Load switch, combination switch 5000/3000 5000/3000
Mechanical life Times
Circuit breaker, disconnector 10000/3000
Design level and rated filling level 0.04
SF6 gas rated pressure Minimum functional level Mpa 0.02
(20℃ relative value)
Pressure relief device releases pressure 0.14
Sealed air box IP67
Protection level
Switchgear housing IP4X
Sealing performance Annual air leak rate ≤ 0.01%

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