Neutral Grounding Resistors
Features
1.Inserting an Neutral Grounding Resistor between neutral and ground in series.
Proper selection of the resistance value of the connected resistor can not only discharge the energy of the second half wave of the single phase grounding arc, so as to reduce the possibility of arc reignition,and suppress the radiation value of grid overvoltage, but also improve the sensitivity of the relay protection device to act on tripping,so as to effectively protect the normal operation of the system.
2.Nominal Value: 0.1 Ohm-1500 Ohm(customized as required).
3.Tolerance:±5%
4.Voltage Scope:380V-69KV(customized as required).
5.Allowable flow time: 10s, 30s, 60s and 10min continuous operation are optional.
6.Strong pertinence,stable resistance value,resistance high temperature and resistance strong impact,to ensure the safe operation of power system, power supply reliability and user power safety.
| Performance Charactertics | |
| Test | Conditions of Test | Testing Results |
| Resistance Tolerance | Testing Voltage ≤3V,Ambient Temperature 25℃ | F--G--J--K |
| Temperature Coefficient | R0:Room Temperature(T0)Resistance Value
R1:Room Temperature T0+100℃(T1)Resistance Value | ±100～±250PPM/℃ |
| Rated Load | 40℃,rated voltage,1hour | △R≤±(3％+0.1Ω)
|
| Short Time Overload | 5 times rated power for 10s | △R≤±(0.2％+0.1Ω) |
| Dielectric Withstand Voltage | 1000V DC | ≥10GΩ1Min |
| Insulation Resistance | 500V DC | No off |
| Terminal Tensile Strength | 40N | No off |
| Vibration resistance | 1.5mm,10-55-10Hz,each 2hours | No damage,No off |
| Load Life | at rated voltage,90 min "On",30 min "Off" ,total 500hours | △R≤±(3％+0.1Ω) |
| Low Temperature Resistance Testing | store at -65℃±3℃ for 2H | △R≤±(1%+0.1Ω) |
| High Temperature Resistance Testing | store at 70 ℃± 2 ℃ for 16h, connect the rated voltage DC circuit for 1s | △R≤±(1%+0.1Ω) |
| Non-flammability | 10 times rated power, power on for 5s | without combustion |
Applications
Widely used in power plant power consumption system,substation power supply system and industrial and mining enterprise power distribution system to realize the zero sequence current detection function by inserting neutral grounding resistor between neutral and ground among these grids ,so as to ensure the normal operation mode of the system.
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BXG1 Type High Power Resistor High Current Grid Neutral Grounding Images
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