Technology of Electrical Automatic

ZJJ Series DC Ground Fault Detector

ZJJ Series DC Ground Fault Detector

The ZJJ series DC Ground Fault Detector can monitor the insulation of the DC bus and the grounding resistance of the positive and negative busbars online in real time. This ground fault monitoring device utilizes an entirely static circuit and includes a highly sensitive grounding resistance monitoring and display circuit. When the insulation monitor drops below the set value, the ground fault monitoring relay sends out a warning signal. This ground fault monitoring system has a Panel mounting or din rail Insulation monitoring relay.

This ground fault detector is used for DC or AC/DC main circuits, UPS systems, battery systems, IT systems with high leakage capacitances, and DC charging stations for electric vehicles

Category:

The ZJJ series DC Ground Fault Detector can monitor the insulation of the DC bus and the grounding resistance of the positive and negative busbars online in real time. This ground fault monitoring device utilizes an entirely static circuit and includes a highly sensitive grounding resistance monitoring and display circuit. When the insulation monitor drops below the set value, the ground fault monitoring relay sends out a warning signal. This ground fault monitoring system has a Panel mounting or din rail Insulation monitoring relay.

This ground fault detector is used for DC or AC/DC main circuits, UPS systems, battery systems, IT systems with high leakage capacitances, and DC charging stations for electric vehicles

Category:

ZJJ Insulation Monitoring Relay Features

  • Monitoring the DC circuit bus bar’s RF to earth insulation resistance.
  • Direct LCD busbar grounding resistance values, both positive and negative;
  • Alarm resistance threshold online display and direct setting;
  • Bridge balance method for resistance measurement;
  • Terminals are pluggable for easy maintenance and replacement;
  • Various packaging structures, reinforced shell, modular structure, high reliability;
  • Wide monitoring voltage, Adjustable response value ranges of 0-100kΩ.
  • Smaller short-circuit grounding current for safe operation.

Specification

Model ZJJ-4S
Input voltage 300-1200VDC
Power supply voltage 90-150VDC
180-300VDC
Power supply current 7-20mA
Operating temperature -40°C ~ 70°C, 85%
Measuring resistance 0~199.9KΩ
Precision V=220V (5%)
Short circuit ground current V=220V (2mA)
Alarm setting range 0~100KΩ
Action return factor Rs=50KΩ(95%-98%)
Output contact capacity Sensitive load=5mS(DC220V0.2A)
Resistive load(DC220V 2A)
Installation type Panel mount

Dimensions

Dimensions of ZJJ Insulation Monitoring Relay

Downloads

Brochure of DC Insulation Monitor Device

ZJJ -4SA -User manual-V1.0

ZJJ-4SC -User manual-V1.0