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Specifications
1. ISO9001 approved
2. Modular design
3. Competive price
4. OEM is available
Outdoor High Voltage SF6 Ring Main Unit
Description & Application
DM series ring main unit, a common tank SF6 gas insulated metal-enclosed switchgear, is composed of load break switch unit, load break switch fuse combination unit, circuit breaker unit, vacuum circuit breaker unit and bus bar inlet line unit. It is widely used in the distribution substation and box-type substation of urban residence districts, high-rise building, large scale public buildings, enterprises and so on.
Technical Parameter & Detail Show
Technical Parameter
Item |
Data |
|||
Module | ||||
K Module |
T Module |
V Module |
||
Load Break Switch |
Composite Apparatus |
Vacuum Circuit Breaker |
Isolating/ |
|
Rated Voltage |
12/24kV |
12/24kV |
12/24kV |
12/24kV |
Power Frequency Withstand Voltage |
42/50kV |
42/50kV |
42/50kV |
42/50kV |
Lightning Impulse Withstand Voltage |
75/125kV |
75/125kV |
75/125kV |
75/125kV |
Rated Current |
630/1250A |
630/1250A |
630/1250A |
630/1250A |
Breaking Capability |
||||
Rated Active Load Breaking Current |
630/1250A |
630/1250A |
||
Rated Cable Charging Breaking Current |
135A |
10A |
||
5%Rated Active Load Breaking Current |
31.5/62.5A |
|||
Fault Earthing Breaking Current |
200/150A |
30A |
||
Short-circuit Breaking Current |
Note2 |
20/16kA |
||
Making Capability |
50kA |
Note2 |
50kA |
50kA |
Transfer Current |
1750A |
|||
Short-time Withstand Current (4s) |
20kA |
20kA |
20kA |
20kA |
Peak Withstand Current |
50kA |
50kA |
50kA |
50kA |
Mechanical Life |
5000 times |
5000 times |
10000 times |
2000 times |
Note: 1. Up to the rated current of dropout fuse;
2. Limited by dropout fuse.
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