Ring Main Unit (RMU) Technical Data Sheet
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- 产品描述
-
Used in power distribution ring networks, compact in size. Insulation types include gas-insulated (SF6) and solid-insulated/air-insulated.
Parameter
Unit
Standard Parameter Value
Detailed Description / Special Requirements
Rated voltage
kV
12
Rated current
A
630
For load switchgear
Rated short-time withstand current
kA/s
20/3, 20/4, 31.5/3
31.5kA is commonly used for fuse combination units
Rated lightning impulse withstand voltage
kV
75
Phase-to-earth; 85kV required across the isolating gap
Degree of protection
-
IP4X
Enclose
Arc duration
s
0.5
Internal arc fault test
Annual gas leakage rate
%/y
≤ 0.1
Applicable only to SF6 gas-insulated units
Service life
year
≥ 40
Keywords:
Ring Main Unit (RMU) Technical Data Sheet
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No.2, Ruzhu Road, Sidu Electrical mechanical industrial Park, Jiangshan City, Zhejiang, China
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