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11kV Ring Main Unit

SM66-Moule type RMU with SF6 load switch as main switch, for whole cabinet is suitable for electric distribution automation and compact also expandable metal close switchgear.It characters in its simp

General

SM66-Moule type RMU with SF6 load switch as main switch, for whole cabinet is suitable for electric distribution automation and compact also expandable metal close switchgear.It characters in its simple structure, flexible operation, reliable interlocking and convininent installation etc. It also can be assembly with RCB series VCB with permanet magnet mechanism.
 
Service enviromenet
a) Air temperature: Maximum temperature: +40℃; Minimum temperature:-5℃
b) Humidity: Monthly average humidity 95%; Daily average humidity 90% .
c) Maximum installation altitude: 2000m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) No frequent violent shake
No. Item Unit C/F Unit V Unit
Load break switch Circuit breaker
1 Rated voltage kV 11 24 11 24
2 Rated current A 630
3 Rated frequency Hz 50/60
4 1min Power frequency withstand voltage kV 45 55 45 55
5 Lightning impulse withstand voltage kV 75 125/150 75 125/150
6 Rated transferring current A 1700 1400  
7 Rated load circuit making current A 630
8 Rated cable(line) charging breaking current A 50&10
9 Rated short circuit breaking current (peak) kA   20 16
10 Rated short circuit making current (peak) kA 63 50 63 50
11 Short time (2s) withstand current, load switch kA 25/20 20/20 25/20 20/20
12 Rated withstand current (peak) kA 63 50 63 50
13 Mechanism life Times 3000 1000 3000
14 Dimension:WideDeep*High mm 325(400)X750X1336(1600)
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