Zago Electric
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NSRM gas-insulated enclosed metal switchgear products are widely used in 10-35kV power distribution systems, and are the selected switch products for various urban and rural users' substation and distribution systems. The switch cabinet is a modular unit mode, which can be combined according to different purposes; It is composed of two categories: fixed unit combination and expandable unit, which meets the needs of various substations for the flexible use of compact switchgear.
The NSRM gas-insulated enclosed metal switchgear is a completely sealed system in which the live parts and switches are enclosed in a stainless steel body. The entire switchgear is unaffected by external environmental conditions, thus ensuring operational reliability and personal safety. And it is maintenance-free. By choosing an expandable busbar, any combination can be achieved to achieve full modularity. Extended busbar safety insulation and shielding ensure reliability and safety. NSRM gas-insulated enclosed metal switchgear can also provide TV-based automation solutions, forming the concept of intelligent switchgear and minimizing the workload of on-site installation and commissioning.
| 1. Model | NSRM Series |
|---|---|
| 2. Rated Voltage | 12kV / 24kV / 36kV |
| 3. Cabinet Type | Name of the cabinet type |
| 4. Current Rating | Rated current specification |
| 5. Extension Type | Modular expansion options |
| 6. Cable Mode | Cable in and out configuration |
1. Technical Description: The NSRM gas-insulated enclosed metal switchgear is mounted on a galvanized sheet frame and the switchgear unit is inside the SF6 gas box, which is made of corrosion-resistant and non-magnetic 3mm thick stainless steel plate. The SF6 airbox is a "sealed pressure system" that can operate for 30 years under normal operating conditions. The pressure of SF6 gas is 0.15~0.4bar. The air box is equipped with a pressure relief device for safety.
2. Switching Unit: The load switch adopts the coaxial rotation double break mode, and the kinetic energy operation is carried out through the same operation hole and the slide plate, ensuring the switch can only be in one of three states: "closing, opening and grounding", completely avoiding misoperation.
3. Operating Mechanism: Installed in the front part of the outside of the air box, treated by special technology to prevent rust, convenient for manual operation and easy to realize electric operation.
| Ambient temperature | -40°C ~ 40°C |
|---|---|
| Relative humidity | Daily average < 95%, monthly average < 95% |
| Altitude | < 2000m |
| Enforced Standards | |
|---|---|
| GB/T11022 / IEC60129 | GB1985 / IEC60298 |
| GB16926 / IEC60056 | GB3906 / IEC60265 |
| GB3309 / IEC60420 | GB38041 / IEC60694 |
| Technical Data | Unit | Module C | Module F | Module V | |
|---|---|---|---|---|---|
| Load Switch | Combination | Vacuum Switch | Isolating | ||
| Rated voltage | kV | 12 | 12 | 12 | 12 |
| Rated frequency | Hz | 50 | 50 | 50 | 50 |
| Power Frequency Withstand | kV | 42/48 | 42/48 | 42/48 | 42/48 |
| Lightning Impulse Withstand | kV | 75/85 | 75/85 | 75/85 | 75/85 |
| Current rating | A | 630 | Note 1 | 630 | - |
| Short-circuit closing current | kA | 50 | 80 | - | - |
| Short-time withstand current | kA/3s | 20 | - | - | - |
| Mechanical life | times | 5000 | 3000 | 10000 | 2000 |
*(Note 1): Depends on the current rating of the fuse.
