ZJJ Series Insulation Monitoring Relay

ZJJ DC insulation monitoring relay monitorsthe insulation of the DC bus, and it sendsalarm signal when the bus-to-groundinsulation drops to a certain value,also it ispanel mounted type,and the relay has a high-sensitivity grounding resistance monitoringand display circuit, it is great significance forthe safe operation of the DC system.

ZJJ Series Insulation Monitoring Relay
ZJJ-4SC.jpg
ZJJ Series Insulation Monitoring Relay
ZJJ-4SC.jpg

FEATURES


·Monitoring of the DC circuit bus barinsulation resistance RF to earth.
·LCD screen display resistance value.
·Bridge balance method for resistancemeasurement.
·Adjustable response value ranges of 0-100kΩ.
·Smaller short-circuit grounding current forsafe operation.

 

MODELS
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

 

Application


·DC or AC/DC main circuits.·UPS systems, battery systems.
·IT systems with high leakage capacitances.·DC charging stations for electric vehicles.