Electrical Standing Type GIS SF6 Insulated RMU Ring Main Unit

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Product Description

Electrical Standing Type GIS SF6 Insulated RMU Ring Main Unit

General

The OMR is a extensible RMU comprising of a Tee off vacuum circuit breaker and two fault-make load break ring switches contained within a common SF6 gas insulated stainless steel enclosure.
The unit is suitable for both indoor and outdoor applications and can be used either as a freestanding unit or for mounting to a transformer, complying with IEC62271-200.

Standard instruction:

D unit configuration (Cable connecting module without earth switch module)
C unit configuration (Load break switch module)
F unit configuration (Load break switch and fuse combination module)
V unit configuration (Vaccum switch module)

Service environment:

a) Air temperature:Maximum temperature: +40℃; Minimum temperature:-20℃
b) Humidity:Monthly average humidity 95%; Daily average humidity 90% .
c) Altitude above sea level:Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.

No.	Item	Unit	C Module (Load Break Switch)		V Module (Circuit breaker)
1	Rated voltage	kV	12	24	12	24
2	Rated current	A	630
3	Rated frequency	Hz	50/60
4	1 min power frequency withstand voltage	kV	45	55	45	55
5	Lightning impulse withstand voltage	kV	75	125/150	75	125/150
6	Rated trasnfer current	A	1700	1400	/
7	Rated active load and close circuit breaking current	A	630
8	Rated cable charge breaking current	A	50/10
9	Rated short circuit breaking current	kA	/		20	16
10	Rated short circuit making current(peak)	kA	63	50	63	50
11	Short time(2s) withstand current, load switch/earth	kA	25/20	20/20	25/20	20/20
12	Rated withstand current(peak)	kA	63	50	63	50
13	Mechanism life	Times	3000		10000	3000