Neutral Grounding Resistors


  • NGRUS

  • High-resistance grounding prevents many of the problems that are associated with ungrounded and soli...More

  • CT secondary current Amps: 0.05, 1

  • Input
    Voltage (V):
     480, 600, 4160

  • Mounting Method: Floor Mount

  • NGR

  • High-resistance grounding prevents many of the problems that are associated with ungrounded and soli...More

  • CT secondary current Amps: 0.05, 1

  • Input
    Voltage (V):
     480, 600, 4160

  • Mounting Method: Floor Mount

  • SE-330

  • The SE-330 is an advanced ground-fault and neutral-grounding resistor monitoring relay that is compl...More

  • Supply
    Voltage
    VAC:
     28 - 52, 65 - 265

  • Supply
    Voltage
    VDC:
     36 - 72, 85 - 275

  • Relay Contacts Config: 1 Form A; 1 Form B; 2 Form C, 2 Form A; 2 Form C

  • SE-330AU

  • The SE-330AU is an advanced earth-fault and earthing-resistor monitoring relay for low- and medium-v...More

  • Supply
    Voltage
    VAC:
     28 - 52, 65 - 265

  • Supply
    Voltage
    VDC:
     36 - 72, 85 - 275

  • Relay Contacts Config: 1 Form A; 1 Form B; 2 Form C, 2 Form A; 2 Form C

  • SE-330HV

  • The SE-330HV is an advanced ground-fault and neutral-grounding resistor monitoring relay that is com...More

  • Supply
    Voltage
    VAC:
     28 - 52, 65 - 265

  • Supply
    Voltage
    VDC:
     36 - 72, 85 - 275

  • Relay Contacts Config: 1 Form A; 1 Form B; 2 Form C, 2 Form A; 2 Form C

  • SE-325

  • The SE-325 Neutral-Grounding-Resistor Monitor is used on resistance-grounded systems up to 25 kV to ...More

  • Supply
    Voltage
    VAC:
     120, 240

  • Supply
    Voltage
    VDC:
     120

  • Relay Contacts Config: 1 Form A (N.O.)

  • PGR-5330

  • The PGR-5330 is an advanced ground-fault and resistor monitoring relay. The PGR-5330 measures neutra...More

  • Communications: RS/TIA-232, RS/TIA-232
    DeviceNet, RS/TIA-232
    Ethernet, RS/TIA-232
    Profibus

  • Frequency: 50
    60
    ASD

  • Information Not Available

Resistance Grounding eliminates transient overvoltages and single phase Arc-Flash hazards by reducing the ground-fault current to 5 A, as well as the ability to locate the ground fault. Per IEEE Standard 141-1993, Arc-flash hazards are eliminated if the ground-fault current is reduced to 5 A or less. For systems 2.4 kV and higher, low-resistance grounding systems can be used. Properly sized resistance grounding systems solve two problems of ungrounded systems—transient overvoltages and difficulty locating ground faults.

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pdf icon Monitoring Neutral Grounding Resistors

Resistance grounding prevents many of the problems that are associated with ungrounded and solidly grounded electrical distribution and utilization systems.