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NSRM-12
NSRM gas insulated enclosed metal switchgear
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Product Overview
The NSRM gas-insulated metal-enclosed switchgear is widely used in 10-35kV power distribution systems and serves as the optimal choice for transformer and distribution systems of various urban and rural users.
The NSRM gas-insulated metal-enclosed switchgear adopts a modular unit design, which can be combined according to different application scenarios. It falls into two main categories: fixed unit combinations and expandable units, effectively meeting the needs of various substations for the flexible application of compact switchgear.
The NSRM-12 inflatable SF6 metal enclosed fully insulated series ring main switchgear produced by our company has undergone type testing by the National High Voltage Electrical Testing Center. Widely used in 10kV /6kV distribution systems, it is the preferred switch product for various urban and rural users’power transformation and distribution systems.
The switchgear adopts a modular unit mode, which can be combined according to different purposes; There are two main types of fixed unit combinations and expandable units, which meet the flexible use needs of various substations for compact switchgear.
The NSRM-12 inflatable switchgear is a completely sealed system, with its electrical components and switches enclosed within a stainless steel body. The entire switch device is not affected by external environmental conditions, ensuring operational reliability and personal safety. And it has achieved maintenance free operation. By selecting expandable busbars, any combination can be achieved to achieve full modularity. The expansion of busbar safety insulation and shielding ensures reliability and safety. The NSRM-12 inflatable switchgear can also provide TV based automation solutions, forming the concept of intelligent switches and minimizing on-site installation and debugging workload.
| Model | Model C | Model F | Model V | Model CB | |||
| Rated voltage | kV | 12 | 12 | 12 | 12 | 12 | 12 |
| Rated frequency | Hz | 50 | 50 | 50 | 50 | 50 | 50 |
| Power frequency withstand voltage (phase to phase/port) |
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 | Note 1) | 630 | – | 1250/630 | – |
| Rated closed-loop breaking current | A | 630 | – | – | – | – | – |
| Rated cable charging breaking current | A | 135/135 | – | – | – | – | – |
| Rated short-circuit closing current (peak) |
A | 50 | 80 | – | – | – | – |
| Rated peak withstand current | A | 50 | – | – | – | – | – |
| Rated short-time withstand current | kA/3s | 20 | – | – | – | – | – |
| Rated short-circuit breaking current | kA | – | 31.5 | 20 | – | 25 | – |
| Rated transfer current | A | – | 1750 | – | – | – | – |
| Maximum current of equipped fuse | A | – | 125 | – | – | – | – |
| Circuit resistance | -n | ≤300 | ≤600 | – | – | – | – |
| Mechanical lifespan | times | 5000 | 5000 | 5000 | 2000 | 5000 | 5000 |
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