SRM-12 series fully enclosed fully insulated inflatable ring network switchgear is SF6 gas insulated metal common box type closed switchgear, which can be composed of load switch unit, load switch fuse combination electrical unit, vacuum circuit breaker unit, bus line entry unit module.
SRM-12 series fully enclosed fully insulated inflatable ring network switchgear is SF6 gas insulated metal common box type closed switchgear, which can be composed of load switch unit, load switch fuse combination electrical unit, vacuum circuit breaker unit, bus line entry unit module. The use of a range of technologies and materials, with excellent electrical and mechanical properties, small environmental and climate impact, small size, easy to install, easy to operate, no maintenance, and has a flexible combination. The clear and intuitive design ensures simple and straightforward operation. Large feeder wiring capacity, suitable for a variety of wiring systems.
| Unit code | Significance |
| C | Standard single bushing load switch unit |
| F | Load switch-fuse combined electrical unit |
| V | Circuit breaker unit |
| D | Cable entry unit (without switch) |
| + | Busbar side bushing |
| – | Busbar top bushing |
| SL | Bus unit |
| M | Measuring unit |
| PT | PT unit |
| 1K2（4） | Load switch unit with double bushing outlet |
Operation Safety:
Through the following security measures, we can provide users with special security:
Integrated Three-station Load Switch
The circuit breaker adopts the load switch instead of the isolation switch, which is safer and more reliable. The fully sealed design of the primary side provides protection against accidental contact. The mechanical interlocked live display can provide the live indication of the line in and out. Equipped with silicone rubber cable plug, the cable head is fully insulated and sealed, so that it is not affected by dust, moisture, small animals and other external environment spring energy storage operating mechanism, manual or electric operation panel analog diagram provides switch position indication cabinet made of galvanized sheet, surface electrostatic spraying, enhance corrosion resistance Pressure gauge monitors the safe pressure range of SF6 gas in the box.
Economy:
maintenance-free
Highly reliable
Flexible Solution:
A variety of wire approach, can achieve a variety of combinations of left, right, up or forward lines, can achieve any combination among the units by using insulated bus, can realize the front and back cabinets or left and right cabinets and design scheme flexible.
Widely Used:
Large feed capacity, small footprint, suitable for a variety of applications.
| SF6 gas pressure | Absolute pressure at 20℃ is 1.4pa | Normal operating environment conditions |
| Annual leakage rate of gas | 0.2%／Year | Maximum temperature is 40℃ |
| Protection class | IP67 | Minimum temperature -40℃ |
| Air chamber stainless steel thickness | 3.0mm | Maximum mean relative humidity
≤95% Altitude ≤2000米 |
| Bus bar | ||
| Bus bar inside Switchgear | 400m㎡ Cu | Meet the criteria |
| Switchgear ground bus | 150mmCu | GB /T11022
GB3906 GB1985 GB16926 GB38041 GB1984 |
| Color | GB3309 | |
| Front panel | RAL7012 | IEC60056
IEC60129 IEC60265 |
| Side panel and cable room front cover plate | RAL 7035 | IEC60298
IEC60420 IEC60694 |
| Project | Unit | Module C | Module F | V Module | CB Module | ||
| Load switch | Combined electrical unit | Vacuum
breaker |
Isolation/ground switch | Vacuum circuit breaker | Isolation/ground switch | ||
| Rated Voltage | KV | 12 | 12 | 12 | 12 | 12 | 12 |
| Rated frequency | HZ | 50 | 50 | 50 | 50 | 50 | 50 |
| Power frequency withstand voltage (phase/terminal) | KV | 42/48 | 42/48 | 42/48 | 42/48 | 42/48 | 42/48 |
| Lightning impulse withstand voltage | KV | 75/85 | 75/85 | 75/85 | 75/85 | 75/85 | 75/85 |
| Rated current | A | 630 | 注 | 630 | 1250/630 | ||
| Rated closed-loop breaking current | A | 630 | |||||
| Rated cable charging breaking current | A | 135/135 | |||||
| Rated short circuit closing current (peak) | 50 | 80 | |||||
| Rated peak withstand current | KA | 50 | |||||
| Rated short-time withstand 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 | |||||
| Loop resistance | Ω | ≤300 | ≤600 | ||||
| Mechanical life | Time | 5000 | 3000 | 5000 | 2000 | 5000 | 5000 |
Note: (1) Depends on the current rating of the fuse.
Urban ring network power distribution systems
Industrial parks and mining enterprises
Commercial buildings and real estate projects
Hospitals and schools
Renewable energy substations
Discover Industry-Specific Power Distribution Solutions
SRM □-12 Fully enclosed fully insulated inflatable ring network switchgear is mounted on a galvanized sheet frame with the switch unit in an SF6 air box made of corrosion-resistant and non-magnetic 3mm thick stainless steel plate. The SF6 gas box is a “sealed pressure system” that operates under normal operating conditions. SF6 gas normal working pressure is 0.015~0.04MPa. The gas box is equipped with a pressure release device to ensure that the gas can be released from the bottom or rear when the pressure is too high.
Cable rooms and cable connections that truly meet your needs
The following 15 standard package combinations are available
Each module of the SRM-12 non-extended standard modular unit cabinet has the following configurations
◇ D cabinet -lifting module
Standard configuration and features in “Cable Connection Module without ground switch”
◇ C cabinet – load switch module
Standard configuration and features in “Load Switch Module”
◇F cabinet -load switch fuse combination electrical cross block
Standard configuration and features in “Load Switch Fuse Combination Electrical modules”
◇ V cabinet -vacuum switch Module
Standard configuration and features in “Vacuum Switch Module”
◇ Capacitive voltage indicator for inlet bushing
◇ Install a pressure gauge for monitoring SF6 density in each air chamber
◇ Lifting lugs for lifting
◇ Operating handle
◇ Optional
Electric operating mechanism
Cable short circuit and ground fault indicator
Current transformer and meter
Remote monitoring and ground fault indicator
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