中性点接地电阻


  • PGN-3000

  • PGN脉冲高电阻接地系统可通过在系统中性线和地线之间插入一个电阻器将电源系统接地……更多

  • 工作
    电压
    (VAC):
     咨询厂家

  • 工作
    电压
    (VDC):
     咨询厂家

  • 认证: 咨询厂家

  • NGR

  • 中性点接地电阻器(NGR)可通过在系统中性线和地线之间插入一个电阻器……更多

  • 工作
    电压
    (VAC):
     咨询厂家

  • 工作
    电压
    (VDC):
     咨询厂家

  • 认证: 咨询厂家

  • PGR-5330

  • PGR-5330是一款先进的接地故障和电阻监控继电器。 PGR-5330能够测量中性……更多

  • 工作
    电压
    (VAC):
     65 - 265

  • 工作
    电压
    (VDC):
     80 - 265, 32 - 70

  • 继电器
    触点:
     两个Form A触点(常开),两个Form C触点(常开/常闭)

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.

These capabilities reduce unscheduled shutdowns due to electrical faults and equipment damage. The PGN Family of Resistance Grounding Systems include all necessary components to convert or design a resistance- grounded system. Additional ground-fault relays, such as the PGR-4704, PGR-5300 or the PGM-8325 can be installed additional functions such as coordination as well as the ability to locate ground faults.