Henan Energy Electric Equipment Co., Ltd. was established in 2011 and is an excellent and reliable power equipment manufacturer in China. The company mainly develops and produces oil-immersed transformers, dry-type transformers, box-type substations, high-voltage switches, and medium and low voltage complete sets of equipment. The equipment put into production and operation of the project advocates energy saving, intelligence, informatization, and mechanization. The company has established the Henan Triangle Energy-saving Transformer Engineering Technology Research Center, with 71 utility model patents and 15 invention patents. With years of accumulation in the transformer industry and strong technological innovation capabilities, HZEC products are sold to the Middle East, North America, South America, Europe, Southeast Asia, Africa, and other regions, covering more than 40 countries.
Product Description
Our company has a good technical team and sophisticated equipment, long-term commitment to the production of neutral grounding products, to reduce the power grid overvoltage, improve the safety and reliability of the power grid, with good results.
In a cable-powered system, the ground capacitance current is larger. When the current is greater than the specified value, arc ground overvoltage will be generated. The purpose of using the neutral resistance grounding method is to inject resistive current to the fault point, so that the grounding fault current is resistive and capacitive, reduce the phase difference with the voltage, reduce the reignition rate after the fault point current zero arc extinguishing, so that the overvoltage is limited to 2.6 times of the phase voltage, improve the sensitivity of relay protection on tripping, so as to effectively protect the normal operation of the system.
The transformer neutral grounding resistance cabinet is a complete set of grounding equipment including grounding transformer produced by our company for the above system requirements, which can be installed in the power plant power system, substation power supply system, industrial and mining enterprise distribution system to achieve the system operation mode of neutral point grounding through resistance.
Product Parameters
6KV, 10KV, 35KV, 66KV Transformer Neutral Point Grounding Resistance Parameters
| Model |
Rated voltage (kV) |
Short-time current (A) |
Short-time current lasting (s) |
Nominal resistance |
| BNR-6/36.36 |
6.3 |
100 |
10 |
36.36 |
| BNR-6/18.18 |
6.3 |
200 |
10 |
18.18 |
| BNR-6/9.09 |
6.3 |
400 |
10 |
9.09 |
| BNR-6/6.06 |
6.3 |
600 |
10 |
6.06 |
| BNR-10/15.16 |
10.5 |
400 |
10 |
15.16 |
| BNR-10/10.10 |
10.5 |
600 |
10 |
10.10 |
| BNR-10/7.57 |
10.5 |
800 |
10 |
7.57 |
| BNR-10/6.06 |
10.5 |
1000 |
10 |
6.06 |
| BNR-35/20.20 |
35 |
1000 |
10 |
20.20 |
| BNR-35/10.10 |
35 |
2000 |
10 |
10.10 |
Service Environment
1. Altitude: not more than 4000m;
2. Ambient temperature: -40ºC ~ +65ºC;
3. Relative humidity: not more than 95% (25ºC);
4. Installation site: the air does not contain chemical corrosion gases and vapors, no dust;
5. Power grid frequency: 48 ~ 52Hz (50 Hz system), 58 ~ 62 Hz (60 Hz system);
6. Suitable for: indoor, outdoor;
7. Installation point: normal neutral displacement does not exceed 3% of the operating phase voltage.
Properties
1. Targeted and well-protected;
2. Compact structure, easy to install;
3. High standards in material selection to ensure product quality;
4. The monitoring function is complete, and provide analog output;
5. Strong technical force, good service.
Outline Diagram Examples
Wiring diagram of resistance cabinet connected to transformer Dimension (1200X1200X1900)
Order Instruction
1. Rated voltage of the system :(KV);
2. Short-time allowable current: (A);
3. Nominal resistance value: (Ω);
4. Whether to install the current transformer (CT) : CT ratio and capacity, compound error;
5. Input and output cable mode: upward down out, down in down out, optional;
6. Short-term allowable flow time: (S);
7. Resistance cabinet material, cabinet (IP) protection level, color code and installation location;
8. Whether it is necessary to install a grounding record and temperature and humidity device.
Certifications
Audited Supplier 
Our company has a good technical team and sophisticated equipment, long-term commitment to the production of neutral grounding products, to reduce the power grid overvoltage, improve the safety and reliability of the power grid, with good results.
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