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
ZJB type transformer neutral point gap grounding protection device is specially designed for 110kV, 220kV, 330kV, 500kV power transformer neutral point, by single-phase isolation switch, neutral lightning arrester, current transformer and discharge gap components, can realize the transformer neutral point grounded and ungrounded operation of two different modes of operation; Therefore, the damage to the transformer caused by the rise of the neutral voltage caused by the system failure can be avoided. The device is widely used in electric power, metallurgy, petrochemical, construction, environmental protection and other fields.
Product Parameters
| Model |
Rated voltage of transformer(kV) |
Neutral point withstand voltage |
Disconnector |
Oxide zinc arrester |
Discharging gap |
Current transformer |
| Lightning full wave and chopped impulse withstand voltage (kv) |
1min power frequency(kV) |
Rated current (A) |
Operational mechanism |
Rated voltage (kV) |
Continuous working voltage (kV) |
DC 1mA reference voltage ≥ |
8/20µs lightning impulse residual current (kV) |
Power frequency discharging voltage(kV) |
Type test |
Transformation ratio |
| ZJB-110 |
110 |
250 |
95 |
400 |
CS8-5 (manual) or CJ6 (Electrical)
|
72 |
58 |
103 |
186 |
83 |
Epoxy resin poured completely enclosed pillar type 10kV (110/5, 200/5, 300/5, 400/5, 500/5, 600/5) |
| ZJB-220 |
220 |
320 |
200 |
600 |
144 |
116 |
205 |
320 |
166 |
| ZJB-330 |
330 |
440 |
292 |
600 |
CJ6 (Electrical) |
207 |
166 |
292 |
440 |
252 |
Properties
1. Design in strict accordance with the relevant provisions of national and industry standards, and support special process flow and inspection process to ensure the process, standardization and specialization of product manufacturing;
2. Set isolation switch, zinc oxide arrester, discharge gap and current transformer and other electrical equipment in one complete set of equipment, with small volume, easy installation and commissioning, high reliability;
3. It has the characteristics of high accuracy of discharge voltage, small dispersion and stable characteristics; With the characteristics of lightning arrester and the insulation of the main transformer precise, full and effective, large heat capacity, not easy to burn, improve the protection safety and protection effect;
4. The device has the characteristics of flexible assembly and convenient use, generally adopts spherical gap, and can also adopt rod gap according to user requirements; Lightning arrester and isolation switch can be selected according to the needs of any combination; The action of the isolation switch can be selected to use manual or electric mechanism according to the engineering requirements; The technical parameters of the gap can be adjusted in the factory or in the field.
Service Environment
1. Suitable for indoor and outdoor;
2. Ambient temperature: not lower than -40ºC, not higher than +55ºC; Relative humidity: not more than 95% (25ºC);
3. The altitude does not exceed 4000m, beyond 4000m can be customized according to the actual situation;
4. Areas with seismic intensity of 7 degrees and below; Wind speed does not exceed 35m/s;
5. Power grid frequency: 58 ~ 62Hz (60Hz system), 48 ~ 52Hz (50Hz system);
6. The air in the installation site should not contain chemical gases and vapors, and there is no dust.
Outline Diagram Examples
ZJB-110kV/D ZJB-220kV/D
Wiring principle
Certifications
Audited Supplier 
){kind=link}