12kv 24kv 36kv Outdoor SF6 Insulated Ring Main Unit Medium-Voltage Switchgear
KGG-12 outdoor high-voltage switching station is a complete set ofelectrical equipment developed based on summary of experience in safeand reliable operation of branching box with switch and technologies onautomatic system of distribution network, which satisfies nationalconditions in China, and represents advanced technical level in China. DFW.12 outdoor high-voltage switching station integrate 12kV switch cabinet.PT power cabinet, feeder FTU, RTU, communication control terminalmetering and automated meters as well as UPS as installed and debuggedinto a movable, sealed and damp proof stainless steel case to shorten theconstruction cycle,and thereby realize modularized integration andassembly of primary and secondary systems of urban distribution network.
Applicable Standards
IEC62271-202:High voltage/low voltage prefabricated substation
IEC 60529:Degrees of protection provided by enclosures(IP Code)
IEC62271-1:2007 High oltage switchgear and controlgear-part 1:common specifications
Service Condition
Altitude: ≤1000m
Ambient temperature:
Maximum temperature: +40℃
Minimum temperature: -10℃,-25℃,-30℃,-40℃
Daily temperature difference: 15K,25K
Seismic fortification intensity: 9 degree
Rated SF6 gas pressure: 0.04MPa
Solar radiation intensity:1000W/m²
Icing thickness:
Class 1 : <1mm
Class 10 : <10mm
Class 20 : <20mm
Wind velocity: <34m/s
(Corresponding to 700Pa as measured on the cylindrical surface) Impact from condensation and rainfall is to be considered;
Vibration from switchgear and control equipment or earthquake can be neglected.
| Technical Parameters |
| No. |
Description |
Unit |
Parameters |
| 1 |
Rated voltage |
kV |
12 |
| 2 |
Rated frequency |
Hz |
50 |
| 3 |
Rated current |
A |
630 |
| 4 |
Power-frequency withstand voltage 1min |
kV |
42 |
| 5 |
Lightning impulse withstand voltage |
kV |
75 |
| 6 |
Rated short-time withstand current |
kA/s |
25/4 |
| 7 |
Rated peak withstand current |
kA |
63 |
| 8 |
Rated short-circuit making current |
kA |
63 |
| 9 |
Rated short-circuit breaking current |
kA |
25(circuit breaker) |
| 10 |
Rated transfer current |
A |
1700 (switch-fuse combination) |
| 11 |
Rated active loading breaking current |
A |
630 |
| 12 |
Rated closed-loop breaking current |
A |
630 |
| |
Circuit breaker |
|
|
| 13 |
Mechanical endurance Load break switch |
Ops |
20000 |
| |
Disconnector/earthing switch |
|
10000 |
| 15 |
Rated pressure of SF6 gas(Relative pressure at 20℃) |
Mpa |
5000 |
| 16 |
Annual leakage rate |
% |
0.04 |
| 17 |
Degree of protection of gas tank |
|
0.05 |
| |
|
|
IP67 |
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