Sf6 630A Gas Insulated Ring Main Unit Rmu 10kV 11kV 12kV 15kV 20kV 24kV 33kV 35kV 36kV Switchgear/sf6 Load Break Switch
Product Overview
RMR series of products is consist of standard functional units, which are completed by the factory processing, using technologically advanced load break switch + vacuum circuit breaker + fuse combination units, it using superior performance of SF6 gas as the arc extinction insulating medium. The cabinet has advantages of small volume, reasonable and compact, convenient installation, simple operation, safe and stable operation,which has been widely recognized in the 3.3kV up to 11kV, 22kV, 33kV and 35kV power supply system.
Technical parameters
|
Serial No.
|
Item
|
Unit
|
parameters
|
|
1
|
Rated voltage
|
kV
|
12, 24, 33,40.5kV
|
|
2
|
Rated current
|
A
|
630
|
|
3
|
Rated frequency
|
Hz
|
50
|
|
4
|
Rated short time withstand current
|
kA
|
20
|
|
5
|
Rated short circuit duration
|
s
|
4
|
|
6
|
Rated withstand current (peak)
|
kA
|
50
|
|
7
|
Rated short circuit duration of grounding switch
|
s
|
4
|
|
8
|
Rated short withstand current (peak) of grounding switch
|
kA
|
50
|
|
9
|
Rated insulation level
|
1min power frequency withstand voltage (effective value)
|
kV
|
(phase-phase, phase-earth)42;
(fracture) 48
|
|
Lightning impulse withstand voltage (peak)
|
kV
|
phase-phase, phase-earth)75;
(fracture) 85
|
|
10
|
Rated SF6 pressure (20°C gage pressure)
|
Mpa
|
0.04
|
|
11
|
SF6 leakage rate per year
|
|
1%
|
|
12
|
Protection degree
|
|
IP3*
|
Ambient condition:
1. Ambient temperature: -25°c~+40°c;
2. Altitude: ≤1000m;
3. Relative humidity: daily average ≤ 95%, monthly average ≤ 90%;
4. Occasions without flammable and explosive matter, without corrosive chemical and frequent severe vibration, without strong shake.
