The ZJJ-4SA LCD Display DC Insulation Monitoring Relay is a state-of-the-art device designed for monitoring insulation resistance in IT systems. This innovative relay utilizes a fully static circuit and features a highly sensitive grounding resistance monitoring and display circuit. It allows users to quantitatively assess the insulation degree of the DC busbar, providing real-time monitoring of the grounding resistance of both positive and negative busbars.

In the event that insulation drops below the preset value, the relay promptly issues a warning signal. The ZJJ-4SA employs a full-hardware divider calculation circuit, enabling direct display of the grounding resistance value, thereby eliminating the confusion often associated with older models that lack a display or only show grounding current. This device is ideal for applications in DC speed-regulating motors, solar power generation, and various other fields.

Features:

• Positive and negative busbar grounding resistance value displayed directly on LCD.
• Alarm resistance threshold displayed and set online.
• Bridge balance method for precise resistance measurement.
• Pluggable terminals for easy maintenance and replacement.
• High reliability with a reinforced shell and modular structure.

Applications:

• DC or AC/DC main circuits.
• UPS systems and battery systems.
• IT systems with high leakage capacities.
• DC charging stations for electric vehicles.
• Monitoring insulation of electrical equipment.
• Support for power transformers, generators, and motors.
• Remote monitoring system for real-time insulation condition monitoring.
• Substations, power plants, transmission lines, and distribution lines.