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 neutral point grounding protection device is specially produced for 220KV, 110KV, transformer coil neutral point grounding. In the power system fault, the asymmetric three-phase fault can be decomposed into positive sequence component, negative sequence component and zero sequence component, and the neutral ground channel of the transformer coil is the zero sequence current path channel, and the zero sequence protection device is to selectively cut the fault component according to the zero sequence voltage and zero sequence current size. TY-BJ transformer neutral point grounding protection device is composed of single-phase isolation switch, neutral point lightning arrester, current transformer and discharge gap and other components, in order to achieve neutral point grounding or not grounded two different operating modes designed to avoid transformer neutral due to lightning shock and fault caused by voltage rise, transformer insulation damage. This product can be widely used in electric power, metallurgy, chemical industry, coal industry.
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 |
630 |
CS14G (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 |
400 |
200 |
630 |
144 |
116 |
205 |
320 |
166 |
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. Installation location: outdoor.
2. Product structure: combined column equipment
3. Ambient air temperature: -40ºC~+55ºC
4. Altitude :2000m
5. Wind speed :35m/s
6. Earthquake intensity: 8 degrees
7. Pollution level: III (2.8KV/cm)
8. Ice thickness :10mm
Certifications
Audited Supplier 
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