Resistor manufacturer briefly describes resistance
The grounding resistance cabinet product gradually tends to diversify, ground resistors, resistors, current transformers, ground protection output terminals, etc. in a closed metal cabinet, and optionally separated. , Arrester, intelligent protection instrument, etc., is available; high security and reliability, clear arrangement, easy to install debugging and operational maintenance. The single-phase transformer adopted by the device is a dry insulating transformer, stable working performance, strong impact resistance, and a stainless steel resistance in the secondary side of the transformer.
Ground resistance cabinet:
1. The resistance cabinet is widely used in high-resistance to limit the ground current to prevent the harm of various overvoltage.
2. The neutral point can limit the fault current to the appropriate value through the resistor, and improve the sensitivity of relay protection to the trip, and simultaneously make the fault point may only occur local slight burns, limit the transient overvoltage to normal line voltage. 2.6 times the neutral point voltage, restricting the reimbustion of the arc, preventing an arc gap over voltage corruption master device.
3. At the same time, it can effectively prevent the ferromagnetic resonant vapor, thereby ensuring the safe operation of the generator. Reduce the power grid overvoltage, improve the security, reliability, and good results.
1, DNR low-voltage ground resistance cabinet: in 0.22kV ~ 0.66kV low voltage system, the device is powered down due to ground failure, so that the low-voltage ground resistance is installed, not only the single-phase ground is not necessary to trip immediately, and when adopted The fuse is used as a protective electrical appliance to reduce the chance of burning when operating the electricity equipment.
2,
BNR transformer neutral point ground resistance cabinet: In the 6kv ~ 35kV power supply system, the ground capacitance current is large, and when the current is greater than the specified value, it is possible to generate an arc ground overvoltage. The purpose of installing the transformer neutral point ground resistance is to inject the resistive current to the fault point, and the resistance component current is 1.05 to 1.1 times the capacitive component current. You can limit the fault current to the power sensitivity, and the relay point may only occur, and the transient overvoltage is limited to 2.6 times the normal relative neutral point voltage, preventing an arc over voltage to damage the main equipment. At the same time, there is a significant effect on ferromagnetic resonance overvoltage.
3, FNR generator neutral point ground resistance cabinet: generator is running, single-phase ground is the most common fault, installing generator grounding resistance cabinets can limit the fault current to the appropriate value, improve the sensitivity of relay protection In the trip, it also allows the fault point like only local slight burns, and the transient overvoltage is limited to 2.6 times the normal line voltage to the neutral point voltage, restricting the reimbustion of the arc, preventing the arc gap over voltage damage main equipment, while It can effectively prevent ferromagnetic resonance, thereby ensuring safe operation of the generator.