Overview
The SXRM6-12 series gas-insulated cabinet uses SF6 gas as the arc-extinguishing and insulating medium. The switchgear has a fully sealed and fully insulated structure, in which the busbars, switches and live parts are completely enclosed in a stainless steel shell.
The cavity is filled with 1.4 bar of SF6 gas and the protection class reaches IP67. Because the switch device is completely unaffected by external environmental conditions, normal operation is maintained even in extreme situations such as short-term water immersion, and the product is maintenance free for life.
The switchgear is equipped with a complete five-prevention interlocking device, which eliminates personnel and equipment operation failures that could be caused by human misoperation. All switchgears also have reliable safety pressure relief channels to protect operators in extreme situations.
Key Features
- SF6 arc-extinguishing and insulating medium — the SXRM6-12 series uses SF6 gas as both the arc-extinguishing and the insulating medium.
- Fully sealed, fully insulated structure — the busbars, switches and live parts are completely enclosed in a stainless steel shell.
- IP67 protection with 1.4 bar SF6 fill — the cavity is filled with 1.4 bar of SF6 gas and the protection class reaches IP67.
- Maintenance free for life — the sealed construction means the switch device is unaffected by external environmental conditions such as short-term water immersion.
- Five-prevention interlocking — a complete five-prevention interlocking device prevents personnel and equipment failures caused by human misoperation.
- Safety pressure relief channels — all switchgears have reliable pressure relief channels to protect operators in extreme situations.
- Fixed and expandable combinations — the switchgear is divided into two categories, fixed unit combination and expandable unit combination.
- Flexible cable routing — front incoming and outgoing lines are usual, with side outgoing lines or side expansion arranged according to the installation position.
Technical Specifications
| Model | SXRM6-12 series |
|---|---|
| Product type | Combined fully enclosed and fully insulated gas-insulated switchgear |
| Insulating and arc-extinguishing medium | SF6 gas |
| Enclosure | Stainless steel shell fully enclosing busbars, switches and live parts |
| SF6 gas filling | 1.4 bar |
| Protection class | IP67 |
| Maintenance | Maintenance free for life |
| Interlocking | Complete five-prevention interlocking device |
| Pressure relief | Reliable safety pressure relief channels on all switchgears |
| Combination types | Fixed unit combination and expandable unit combination |
| Cable routing | Front incoming and outgoing lines as standard; side outgoing lines or side expansion available |
| Cabinet size | Suitable for narrow spaces and poor environmental conditions |
Applications
- Urban distribution networks — medium voltage distribution where the available space is limited.
- Industrial facilities — distribution in areas with poor environmental conditions.
- Underground and confined installations — locations where the switch device may be exposed to water or humidity.
- Infrastructure projects — distribution nodes requiring high protection class equipment.
Installation Conditions
- The cabinet size is convenient for installation and suits places with narrow space and poor environmental conditions.
- The usual arrangement is front incoming and outgoing lines; side outgoing lines or side expansion can be realised according to the installation position.
- Because the enclosure is sealed and rated IP67, the switch device is unaffected by external environmental conditions.
- Fixed unit combinations are supplied as a set arrangement, while expandable unit combinations allow the installation to be extended.
How to Select
- Whether a fixed unit combination or an expandable unit combination is required.
- Cable routing arrangement — front incoming and outgoing lines as standard, or side outgoing lines and side expansion.
- Rated voltage, rated current and short-circuit withstand level of the network.
- Number of ways and the switching configuration of each way.
- Installation position and the space available for the cabinet.
FAQ
What does fully enclosed and fully insulated mean?
It means the busbars, switches and live parts are completely enclosed inside a stainless steel shell and insulated by SF6 gas, so no live part is exposed to the surrounding air or environment.
What protection class does the enclosure provide?
The protection class reaches IP67 because the cavity is filled with 1.4 bar of SF6 gas. The switch device is therefore completely unaffected by external environmental conditions and continues to operate normally even in extreme situations such as short-term water immersion.
Does the switchgear require maintenance?
The product is maintenance free for life. The fully sealed construction keeps the live parts isolated from the environment, so no routine servicing of the gas compartment is required.
What is the five-prevention interlocking device?
It is a complete interlocking arrangement that prevents the misoperation combinations that could otherwise endanger personnel or equipment, thereby eliminating operating failures caused by human error.
What happens in the event of an internal arc or overpressure?
All switchgears are fitted with reliable safety pressure relief channels. These direct the pressure and gases away in an extreme situation so the personal safety of operators is maintained.
Can the switchgear be expanded or connected from the side?
Yes. The switchgear is available as a fixed unit combination or as an expandable unit combination. The usual arrangement is front incoming and outgoing lines, and side outgoing lines or side expansion can be realised according to the installation position.
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