中性点接地电阻


  • SE-330

  • SE-330是一款先进的接地故障和中性点接地电阻监控继电器,符合……更多

  • 工作
    电压
    (VAC):
     28-52, 65-265

  • 工作
    电压
    (VDC):
     36-72, 85-275

  • 继电器
    触点:
     一个A型 一个B型 两个C型 两个A型 两个C型

  • Find Littelfuse SE-330HV Products

    SE-330AU

  • SE-330AU是一种先进的接地故障和接地电阻监测继电器,可用于低电压和中等电压……更多

  • 工作
    电压
    (VAC):
     28-52, 65-265

  • 工作
    电压
    (VDC):
     36-72, 85-275

  • 继电器
    触点:
     一个A型 一个B型 两个C型 两个A型 两个C型

  • SE-330HV

  • SE-330是一款先进的接地故障和中性点接地电阻器监控继电器。 它可测量……更多

  • 工作
    电压
    (VAC):
     28-52, 65-265

  • 工作
    电压
    (VDC):
     36-72, 85-275

  • 继电器
    触点:
     一个A型 一个B型 两个C型 两个A型 两个C型

  • 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):
     32 - 70, 80 - 265

  • 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.

pdf icon Improving Drill Rig Reliability with High Resistance Grounding - Case Study

pdf icon Littelfuse Relays Drill Home a Safety Solution for Hydraulic Fracturing - Case Study

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.