SRM-12 sf6 gas insulated switchgear/QIANLAI ELECTRIC
Product overview
The SRM-12 fully insulated and fully enclosed metal-clad switchgear produced is an SF6 gas-insulated metal common-box type enclosed switchgear. This equipment can complete a variety of modes including load switch units, switch + fuse combination combination electrical units, vacuum circuit breaker units, and busbar incoming line units.
Adopting a series of standard technologies and materials, it has excellent electrical and mechanical properties, is less affected by the environment and climate, has a compact size, is safe and reliable, convenient to operate, and maintenance-free, and features flexible combination modes. The clear and intuitive design ensures simple and direct operation. It also has a large short-circuit capacity and is suitable for various wiring systems.
Performance Indicators
SF6 Gas Parameters
Absolute pressure at 20℃: 1.4 bar
Annual Gas Leakage Rate: 0.2% per year
Thickness of Stainless Steel for Gas Chamber: 3.0 mm
Busbars
Busbars in switchgear cabinet: 400 mm²Cu
Earthing busbar of switchgear cabinet: 150 mm²Cu
Colors
Front panel of switchgear cabinet: RAL7012
Front door and front cover plate of cable compartment: RAL705
Normal Operating Environmental Conditions
Maximum temperature: 40℃
Minimum temperature: -40℃
Maximum average relative humidity: ≤95%
Altitude: ≤2000 meters
Compliant Standards
GB/T 11022, GB3906, GB/T8564 GB16926, GB38041,
IEC 1989 IEC61339
IEC60529, IEC60068, IEC62061 IEC60208,
IEC60404, IEC60894
Main Technical Parameters
| name | unit | C module | F module | V module | CB module | ||
| Load switch | Vacuum Circuit breaker | Vacuum Circuit breaker | Disconnector/ earthing switch | Vacuum Circuit breaker | Disconnector/ earthing switch | ||
| rated voltage | KV | 12 | 12 | 12 | 12 | 12 | 12 |
| rated frequency | HZ | 50 | 50 | 50 | 50 | 50 | 50 |
| rated power frequency withstand voltage （phase to phase/port） | KV | 42/48 | 42/48 | 42/48 | 42/48 | 42/48 | 42/48 |
| rated lightning impluse withstand voltage | KV | 75/85 | 75/85 | 75/85 | 75/85 | 75/85 | 75/85 |
| rated current | A | 630 | 630 | 1250/630 | |||
| rated closed-loop breaking current | A | 630 | |||||
| rated cable charging breaking current | A | 135/135 | |||||
| rated short-circuit making current (peak) | kA | 50 | 80 | ||||
| rated peak duration current | kA | 50 | |||||
| rated short time duration current | kA/3s | 20 | |||||
| rated short circuit breaking current | kA | 31.5 | 20 | 25 | 25 | ||
| rated transfer current | A | 1750 | |||||
| maximum current of fuse | A | 125 | |||||
| circuit resistance | Ω | ≤300 | ≤600 | ||||
| mechanical life | times | 5000 | 5000 | 5000 | 5000 | 5000 | 5000 |
Product Features
Operational Safety:
We can provide users with special safety protection through the following safety measures:
Integrated three-position load switch
The circuit breaker uses a load switch instead of an isolating switch, which is safer and more reliable; the fully enclosed design on the primary side prevents accidental
contact; equipped with a mechanical interlock (meeting five-prevention requirements) and a live-line indicator, which can provide live-line indication for incoming and
outgoing lines
Reliable operation: Adopts a fully enclosed design; all 10kV switches and live busbar parts are sealed in a gas tank welded from 3mm stainless steel plates; equipped
with silicone rubber cable plugs to realize full insulation and sealing of cable heads, avoiding the impact of external environments (such as dust, humidity, small
animals)
Adopts a spring energy storage operating mechanism, supporting manual or electric operation; the panel schematic
diagram displays the switch position
The cabinet body is made of galvanized sheet, with an electrostatic-sprayed surface to enhance corrosion resistance
The safe pressure range of SF6 gas in the tank is monitored by a pressure gauge
Economy:
Maintenance-free
Highly reliable
Service life up to 20 years
Flexible Solutions:
Multiple incoming line methods (left, right, top or front incoming lines are available)
Flexible combination methods, allowing arbitrary combination between units
Adopts insulated busbars, enabling front-back or left-right cabinet paralleling
Flexible design solutions
Wide Application:
The feeder line has large capacity and small floor area, suitable for various application needs
