ZJJ-4SA LCD display DC insulation monitoring relay for IT system insulation resistance mon

Description

The ZJJ – 4SA DC insulation relay adopts a fully static circuit, and has a highly sensitive grounding resistance monitoring and display circuit, which helps users make a quantitative assessment of the reduction of the insulation degree of the DC busbar, and monitors the grounding resistance of the positive and negative busbars online in real time. When the insulation drops below the set value, the relay sends out a warning signal.

Due to the use of a full-hardware divider calculation circuit, it can directly display the grounding resistance value, which solves the confusion caused by the old relays that have no display or can only display the grounding current, and must manually check the table; the alarm threshold also uses the resistance value. directly displayed. ZJJ-4SA adopts instrument structure with panel, are widely used in DC speed regulating motors, solar power generation and other fields.

FEATURES

l Positive and negative busbar grounding resistance value direct LCD;

l Alarm resistance threshold online display and direct setting;

l Bridge balance method for resistance measurement;

l Terminals are pluggable for easy maintenance and replacement;

l Various packaging structures, reinforced shell, modular structure, high reliability;

APPLICATIONS

l DC or AC/DC main circuits;

l UPs systems, battery systems;

l IT systems with high leakage capacities;

l DC charging stations for electric vehicles;

l Monitoring the insulation of electrical equipment;

l Supporting use of power transformers, generators, and motors;

l Remote monitoring system, real-time monitoring of insulation conditions;

l Substations, power plants, transmission lines, distribution lines.

Specification