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NSRM-33
NSRM-33 SF6 gas-insulated ring main unit
NSRM-33 33kV SF6 gas filling cabinet is a medium high voltage gas insulated equipment developed for cross-border distribution networks and special industrial scenarios. It is compatible with the international common voltage level of 33kV and adopts a fully sealed metal armor structure. SF6 gas is used as the insulation and arc extinguishing medium, which has excellent insulation performance, arc extinguishing performance, and environmental adaptability. The product has high integration and can achieve integrated functions of switching, protection, and measurement and control. It can meet the power supply needs of multinational enterprises, overseas projects, and some special distribution networks in China, with safe and reliable operation and low maintenance costs.
Features
1. International standard adaptation:
Compliant with international standards such as IEC and ANSI, the voltage level, interface size, and communication protocol are all compatible with international general specifications, suitable for overseas engineering and multinational enterprises to use.
2. High strength cabinet structure:
It adopts a high-strength aluminum alloy shell, which is 30% lighter than traditional steel cabinets, making it easy to transport and install. At the same time, it has excellent compressive and impact resistance, and is suitable for harsh outdoor working conditions.
3. Precise measurement and control capability:
Integrating high-precision transformers and intelligent measurement and control units, it can accurately monitor parameters such as current, voltage, power, harmonics, etc., support fault recording and data analysis, and provide a basis for optimizing the distribution network.
4. Long term stable operation:
SF6 gas has excellent sealing performance, with a leakage rate of ≤ 0.03%/year. The core components are made of imported brands, with a mechanical life of 12000 times and an electrical life of 40 short circuit breaks, ensuring high operational stability.
5. Explosion proof safety design:
Equipped with a pressure release device, it can quickly release pressure when the pressure inside the gas chamber rises abnormally, avoiding cabinet explosion. At the same time, the shell is treated with anti-static and anti-corrosion measures to improve safety during use.
The product has a rated current of 800A-2500A, a rated short-time withstand current of 40kA/3s, a rated breaking current of 40kA, a rated insulation level relative to ground of 110kV/1min, and a phase to phase of 110kV/1min. Adapting to environmental temperatures ranging from -35 ℃ to+65 ℃, with an altitude adaptability of ≤ 4500m, it can meet the needs of use in high-altitude and cold regions. The operating mechanism adopts a spring operating mechanism, which has fast opening and closing speed, low operating energy consumption, and supports remote control and automatic reclosing function.
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Specification
| Item | Unit | Model C | Model F | Model V | Model CB |
| Rated voltage | kV | 33 | 33 | 33 | 33 |
| 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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FAQs
Can the 33kV SF6 filling cabinet be used for domestic distribution networks?
It can be used for special distribution networks in China that use a voltage level of 33kV (such as some old power plants and multinational enterprise factories), but the mainstream medium and high voltage distribution network in China is 35kV, and the adaptability of the voltage level needs to be confirmed before use.
How to ensure after-sales service when using overseas projects?
The manufacturer has service outlets in multiple regions around the world, which can provide on-site installation, debugging, and maintenance services, as well as remote technical support to ensure the normal operation of overseas project equipment. The after-sales service response time is ≤ 24 hours.
What is the equipment's ability to resist electromagnetic interference?
Through electromagnetic compatibility testing, it can resist strong electromagnetic interference and is suitable for installation in complex electromagnetic environments such as substations and communication base stations. Its operating parameters are not affected by electromagnetic interference.
Is the process of SF6 gas recovery and treatment complicated?
Not complicated, the manufacturer can provide professional SF6 gas recovery equipment and technical guidance. The recovered gas can be purified and reused, meeting international environmental standards and avoiding environmental pollution.
Can we customize products based on the local climate conditions overseas?
Yes, the sealing structure, insulation design, and material selection of the cabinet can be optimized according to local climate conditions such as temperature, humidity, altitude, and sandstorms to ensure that the product is suitable for the local environment.
Is there any special requirement for the transportation and installation of the product?
During transportation, shockproof and moisture-proof packaging should be used to avoid severe vibration and moisture intrusion; During installation, it is necessary to strictly follow international installation standards. The manufacturer can send a professional team to provide on-site guidance to ensure installation quality.
Related Applications
Overseas engineering distribution network construction, such as Southeast Asia, Africa, and other regions that use 33kV voltage levels.
The distribution network system of multinational enterprise factories and foreign-funded power plants is adapted to international standard power supply requirement
The medium and high voltage distribution network in high-altitude areas (such as high-altitude power stations) can withstand low-pressure environments.
The medium and high voltage distribution network in high-altitude areas (such as high-altitude power stations) can withstand low-pressure environments.
The core equipment of the distribution network for international aid projects and overseas industrial parks complies with international standards.
