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NSRM-30
NSRM-30 SF6 gas-insulated ring main unit
The NSRM-30 30kV SF6 gas filling cabinet is one of the core equipment of medium and high voltage distribution network. It adopts modular sealing design, uses SF6 gas as insulation and arc extinguishing medium, integrates circuit breakers, load switches, grounding switches, transformers and other components, and has the characteristics of small size, high reliability, and convenient operation and maintenance. This product optimizes the insulation structure and arc extinguishing performance for 30kV distribution network scenarios, and can adapt to high load and high reliability power supply scenarios. It is widely used in regional distribution networks, industrial enterprises, and other fields, effectively improving the quality and stability of distribution network power supply.
Features
1. Optimize insulation structure:
Design insulation spacing based on the characteristics of 30kV voltage level, use pot type insulators to separate air chambers, ensure more stable insulation performance, control partial discharge level below 10pC, and eliminate the risk of insulation breakdown.
2. Efficient arc extinguishing capability:
Equipped with SF6 vacuum composite arc extinguishing chamber, the short-circuit breaking current can reach 40kA, the breaking speed is fast, the medium recovery speed after arc extinguishing is fast, and it can be operated frequently, adapting to scenarios with multiple distribution network faults and frequent operations.
3. Independent design of air chamber:
Adopting a multi chamber sealing structure, each functional unit has an independent air chamber to avoid any leakage that may affect the overall operation of the equipment. At the same time, it is easy to locate and repair faults, improving the safety of equipment operation.
4. Excellent weather resistance:
Suitable for environmental temperatures ranging from -40 ℃ to+70 ℃, passing high and low temperature cycling tests and humidity tests, it can operate for a long time in high-altitude, high temperature, and high humidity areas without the need for additional protective measures.
5. Strong customization ability:
Different types of transformers, protection devices, and operating mechanisms can be configured according to user needs, supporting multiple wiring methods such as ring networks, terminals, and branches, and adapting to complex distribution network architectures.
The product has a rated current of 630A-2000A, a rated short-time withstand current of 40kA/3s, a rated peak withstand current of 100kA, and a protection level of IP67. SF6 gas filling capacity 8-18kg, leakage rate ≤ 0.05%/year, equipped with gas recovery and reuse device interface. The operating mechanism supports both manual and electric modes, and the electric operating mechanism can be adapted to AC220V and DC220V power supplies. The cabinet is made of stainless steel material, which has excellent anti-corrosion performance and is suitable for long-term outdoor installation.
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Specification
| Item | Unit | Model C | Model F | Model V | Model CB |
| Rated voltage | kV | 30 | 30 | 30 | 30 |
| Rated frequency | Hz | 50 | 50 | 50 | 50 |
| Power frequency withstand voltage (phase to phase/port) | kV | 70/80 | 70/80 | 70/80 | 70/80 |
| Lightning impulse withstand voltage | kV | 185/215 | 185/215 | 185/215 | 185/215 |
| Rated current | A | 630 | – | 630/1250 | 630/1250 |
| Rated closed-loop breaking current | A | 630 | 630 | – | – |
| Rated cable charging breaking current | A | 135 | 135 | – | – |
| Rated short-circuit closing current (peak) | A | 50 | 80 | 50 | 50 |
| Rated peak withstand current | A | 50 | – | 50 | 50 |
| Rated short-time withstand current | kA/3s | 20 | – | 20 | 20 |
| Rated short-circuit breaking current | kA | 20 | 31.5 | 20 | 25 |
| Rated transfer current | A | – | 1750 | – | – |
| Maximum current of equipped fuse | A | – | 125 | – | – |
| Circuit resistance | -n | ≤300 | ≤600 | ≤300 | ≤300 |
| Mechanical lifespan | times | 5000 | 5000 | 5000 | 5000 |
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Related Products
FAQs
What is the difference between 30kV SF6 filling cabinet and 35kV products?
The core difference lies in voltage adaptability and insulation structure. 30kV products optimize insulation spacing for 30kV distribution networks, resulting in lower costs and adaptability to specific regional distribution networks; The insulation level of 35kV products is higher and suitable for mainstream 35kV distribution network scenarios nationwide. The two cannot be mixed.
Is the noise generated by the device during operation loud?
Operating noise ≤ 55dB, much lower than traditional switchgear, suitable for installation in noise sensitive areas such as residential and commercial areas, without affecting the surrounding environment.
How to determine if SF6 gas is leaking?
In addition to the built-in density monitoring device of the equipment, SF6 gas leak detector can be used for on-site testing. The equipment has undergone strict airtightness testing before leaving the factory to ensure that the leakage rate meets the standard, and there is no need for frequent leak detection in daily life.
What factors affect the service life of the product?
Mainly affected by sealing performance, operating frequency, and environmental conditions, under normal operation, the lifespan of core components is 20 years, and the lifespan of cabinets is 25 years. Regular simple maintenance can extend the service life.
Does it support live detection and maintenance?
Supports live detection of gas density, switch status and other parameters, but maintenance requires power outage operation. Modular design can shorten power outage maintenance time and reduce the impact on power supply.
Has the product obtained relevant national certifications?
It has passed the testing of the National High Voltage Electrical Quality Supervision and Inspection Center, obtained the type test report, and meets the relevant standards of GB and IEC. It can be safely put into use.
Related Applications
Regional distribution substations and switch stations serve as the core switching equipment for medium and high voltage distribution networks.
The high-voltage distribution system in large industrial enterprises and metallurgical plants meets the high load power supply demand.
The boosting and distribution process of new energy power plants such as wind power and photovoltaics is suitable for complex outdoor environments.
The supporting distribution network of urban rail transit ensures the reliability of power supply for subways and light rails.
Construction of distribution network in remote areas, tolerant to extreme weather conditions, and reducing operation and maintenance frequency.
