Gas Insulated SF6 ring main unit switchgear 11kv Ring Main Unit
SF6 Metal-Clad Enclosed Ring Main Unit
12 24 36KV,50/60Hz, 630、1250A
OEM & ODM,Complete equipment
Meet IEC standards
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- General
This RMU switchgear using SF6 as arc extinguishing medium with double open contacts, 3 working-position and rotating contact which placed in an epoxy resin shell of a reinforced structure. Each gas box must pass helium leak detection before being filled with 0.045Mpa SF6 (Inspect any leakage to ensure can be installed vertically or horizontally). The classic installation is "horizontal", that is, install steel partitions between the cable compartment and the busbar compartment. That makes the interval between the busbar and the cable joint the most stringent safety requirements.
Standard
- ISO 780-1997,MOD.
- IEC 62271-102:2002,MOD
- IEC 60265-1:1998,MOD
- IEC 60298:1990
- IEC 60529:1989
- IEC 507:1991
- IEC 60694:1996
- IEC 60420:1990
- Service environment
- Air temperature: -35℃~+40℃
- Humidity: Monthly average 95%; Daily average 90% .
- Altitude :≤ 1000m (Up to 5000 m can be custom)
- Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
No frequent violent shake
Technical Data
No. |
Item |
Unit |
Parameter |
Cabinet size |
||||
1 |
Rated voltage |
kV |
12 |
24 |
12kV |
|||
2 |
Rated frequency |
Hz |
50/60 |
Load switch |
Low voltage |
Circuit breaker |
||
3 |
Rated current |
A |
630/1250 |
mm |
mm |
mm |
||
4 |
1min Power frequency withstand voltage |
kV |
Alternate/ |
42 |
65 |
W*D*H |
H |
W*D*H |
Primary isolation |
48 |
79 |
375/500/750 |
350/450 |
800 |
|||
5 |
Lightning impulse withstand voltage |
kV |
Alternate/ |
75 |
125 |
24KV |
||
Primary isolation |
85 |
145 |
Load switch |
Low voltage |
Circuit breaker |
|||
6 |
Rated short circuit breaking current |
KA |
Main circuit |
20 |
20 |
mm |
mm |
mm |
Ground loop |
20 |
17.4 |
W*D*H |
H |
W*D*H |
|||
7 |
Rated short-circuit withstand current duration |
S |
4 |
4 |
600 |
710 |
800 |
|
8 |
Rated peak withstand current |
kA |
50 |
50 |
Optional components: |
|||
9 |
Transfer current |
A |
1700 |
1200 |
||||
10 |
Protection class |
>IP3X |
||||||
11 |
Mechanical life of load switch |
>5000 times |
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12 |
Mechanical life of earthing switch |
>2000 times |