SM66 Half SF6 Gas Insulated Ring Main Unit
SM66 unit 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 can provide the satisfactory technical projects both for different application occasions and users. Operational methods for the main switch inside ring main unit can be either manual or electric power driven.Product Description
Sf6 Gas Insulation Switchgear Type Ring Main Unit
General:
SM66 unit type SF6 ring net cabinet 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 user. With the adoption of sensor technology and the protection relay up to date, plus the advanced technology and flexible assembly project, SM66 unit type SF6 ring net cabinet can completely meet the requirement of continuously variable market. It can take self-produced RLS-40.5 load switch or SFG type SF6 load switch by ABB; also according to user’s demand 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 VS1-12 type vacuum circuit breaker with permanent magnetic mechanism. Operational methods for the main switch inside ring main unit can be either manual electric power driven. And it can meet the requirement of “four controls” when matched with FTU and RTU.
Service environment:
1. air temperature: maximum temperature : +40ºC; minimum temperature: -35ºC
2. humidity: monthly average humidity 95%; daily average humidity 90%
3. altitude above sea level: maximum installation altitude: 2500m
4. ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
5. no frequent violent shake.
Main technical specifications:
NO.
Item
Unit
Parameter
1
Rated voltage
KV
36
40.5
2
Rated frequency
HZ
50/60
3
Rated current
A
630/800
4
1 min power frequency withstand voltage
Wet
KV
70
95
dry
KV
80
110
5
Lightning impulse withstand voltage
KV
170
185
6
Rated short circuit breaking current (peak)
KA
195
215
7
Rated active load and close circuit breaking current
A
400/630
8
Rated transferring current
A
1200
1000
9
Rated short circuit making current(peak)
KA
63
63
10
Rated cable off load
A
50
11
Transformer off load
A
16
12
Rated withstand current (peak)
KA
63
13
Short time withstand current(2s)
KA
25
14
Mechanism life
times
2000
2000
Note: for short circuit breaking and peak current is based on fuse plus combination.
