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By certification 
Cooper RVAC Ring Main unit Cabinet
1. Structural Characteristics
All-weather, strong adaptability to environment
l Pass water-immersion test under 12kV power in 24 hours, protection level is IP68, reliably withstand summer flooding.
l SF6 gas box is made of stainless steel plate and the surface is painted with antirust paint to prevent the influence of salt water, moisture, contamination and temperature so that it can keep durable and beautiful appearance.
l Equipped with COOPER prefabricated shielded touchable cable accessories, it can be plugged and unplugged with power and it can operate under water or other harsh conditions for a long time.
Fully sealed, fully insulated, maintenance-free
l All the high-voltage energized parts are enclosed in main cabinet which can’t be reached.
SF6 gas box Zero gauge pressure can withstand up to 32KV (1min), it has large insulation margin.
Load switch cabinet (k unit/k1 unit)
Load switch fuse combination cabinet (T unit)
CB cabinet (V unit)
Metering cabinet (M unit)/PT cabinet (PT unit)
2. Main Parameters
Items |
Unit |
Load Switch |
Fuse Combination |
Vacuum Circuit Breaker |
|
Rated voltage |
kV |
12 |
12 |
12 |
|
Rated current |
A |
630 |
125* |
630 |
|
Power frequency withstand voltage (1min) |
Interphase, to-ground, between breaks |
kV |
42 48 |
42 48 |
42 48 |
Lightning impulse withstand voltage (BlL) |
Interphase, to-ground, between breaks
|
kV |
75 85 |
75 85 |
75 85 |
Zero indication (1min) power frequency withstand voltage |
kV |
32 |
32 |
32 |
|
Secondary circuit power frequency withstand voltage (1min) |
V |
2000 |
2000 |
2000 |
|
Rated load breaking current |
A |
630 |
630 |
630 |
|
Rated cable charging breaking current |
A |
10 |
10 |
25 |
|
Rated short circuit breaking current |
kA |
31.5* |
20 |
||
Rated transfer breaking current |
A |
1700 |
|||
Rated short circuit closed current (peak) |
kA/ |
50/5 |
50 |
||
Grounding switch closed current (twice) |
kA/ |
50/2 |
50/2 |
||
Rated short-time withstand current |
kA/s |
20/4 |
20/4 |
20/3 |
|
Rated peak withstand current |
kA |
50 |
50 |
50 |
|
Mechanical service life |
5,000 |
5,000 |
10,000 |
||
SF6 gas rated pressure (20℃) |
MPa |
0.03 |
0.03 |
0.03 |
|
SF6 gas annual leakage rate |
% |
＜0.05 |
|||
