General:
HXGN15-12 SF6 ring main unit 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 convenient installation etc., which can provide the satisfactory technical projects both for different application occasions and users. With the adoption of sensor technology and the protection relay up to date, plus the advanced technology and flexible assembly project, HXGN15-12 unit type SF6 ring net cabinet can completely meet the requirement of continuously variable market. It can take self-produced FLN36-24 load switch or SFG type SF6 load switch by ABB; also according to the demand of user can be assembled with the internationally top-ranking RCB series vacuum circuit breaker with permanent magnetic mechanism made by AREVA or HD4 type SF6 circuit breaker made by AREVA or HD4 type SF6 circuit breaker made by ABB or with our VS1-24 type vacuum circuit breaker with permanent magnetic mechanism. Operational methods for the main switch inside ring main unit can be either manual or electric power driven. And It can meet the requirement of "Four Controls" when matched with FTU and RTU.
Service environment:
a) Air temperature: Maximum temperature: +40℃; Minimum temperature:-35℃
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.
e) No frequent violent shake.
|
No.
|
Item
|
Unit
|
parameters
|
|
1
|
Rated voltage
|
KV
|
12
|
|
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 pressure0
|
Mpa
|
0.04
|
|
11
|
SF6 leakage rate per year
|
|
1%
|
|
12
|
Protection degree
|
|
IP3*
|
