One.Overview
Hebei jie tai electric co., LTD is specializing in the production of electric power system with neutral grounding resistance ark manufacturer, the company has a skilled r&d team and sophisticated manufacturing equipment, introduce and absorb foreign advanced technology, long-term commitment to the power system with neutral grounding technology products research and development, production, sales and service. Jt-bz transformer neutral grounding resistance cabinet has good effect on reducing overvoltage of power grid and improving the safety and reliability of power grid. The series resistor is widely used in power plant auxiliary power system, power supply system of substation, industrial and mining enterprises, power distribution system such as 6 ~ 35 kv ac power grid or on the generator neutral point of transformer, in order to realize the power grid with neutral point grounding resistance.
Two. Product use
Jt-bz type transformer neutral grounding resistance cabinet is used in the transformer neutral point of 6 ~ 35KV ac power grid to realize the way that the neutral point is grounded by resistance.
Three. Product features
1. The product is made of high quality imported or domestically produced stainless steel stainless steel electric heating, metal materials with high conductivity, high temperature coefficient, strong corrosion resistance, high temperature resistance, oxidation resistance, high tensile strength and resistance stability characteristics, safety and reliability of the operation of the product;
2. The product is mainly pin 6-35 kv system, transformer of star connection, direct connect neutral resistance, transformer delta connection provide independent grounding transformer neutral point, derivation neutral resistance and the connection of use;
3. The resistance value can range from 1 ohm to 2000 ohm, and the current from 1 amp;
4. The resistance cabinet is used outdoors or indoors, and the cabinet is made of stainless steel plate or cold rolled steel;
5. The product can be equipped with isolation switch for easy maintenance;
6. Intelligent temperature and humidity control device is installed in the cabinet;
7. Comprehensive tester can be mounted to the resistance ark, can monitor resistance ark in neutral unbalance current resistance under normal operation of the cabinet temperature, also can be used to detect single-phase earth fault occurred in an instant the current grounding and record number, and provide communication interface, will detect and record the information transfer to the master control room.
Four. Model specification
Five. The wiring diagram
Six. Conditions of use
1. Generally used outdoors, used in 6-35kv system;
2. The elevation is not higher than 3500 meters. Due to the high altitude and low heat dissipation in the plateau region, please indicate when ordering.
3. The ambient temperature: - 20 ℃ ~ + 70 ℃, relative humidity is not more than 95%;
4. Wind pressure shall not exceed 700Mpa (equivalent to wind speed of 34m/s);
5. Seismic intensity: less than 8;
6. Ice thickness: less than 10mm;
7. Air pollution level: level is not higher than Ⅳ;
8. No inflammable, explosive, non-corrosive gas and conductive dust in the surrounding environment;
9. Since the resistance is a heating element, the temperature rise is higher when used, and the place where the resistor is installed should have a space around it to prevent the influence of external heat sources. Please pay attention when installing.
Seven. Ordering instructions
1. System rated voltage :(kV);
2. Short-term allowable current :(A);
3. Nominal resistance (Ω);
4. Current transformer (CT) : CT variable ratio and capacity, accuracy;
5. Incoming and outgoing line: up and down, down and out optional;
6. Temporary allowable flow time :(S);
7. Resistance cabinet material, cabinet (IP) protection grade, color standard and installation site;
8. If there is a grounding transformer, if there is a ground change, the grounding transformer is integrated with the resistor.
9. Intelligent detection device with resistance cabinet.
