DC Insulation Monitoring Relay with LCD Display
This DC insulation monitoring relay features an LCD display for easy reading of measured values and alarm status. It provides continuous monitoring of insulation resistance, ensuring the safety and reliability of electrical installations.
Technical Specifications
Overview
Professional DC Insulation Monitoring
The ZJJ-4SA is a high-precision static circuit relay designed for real-time monitoring of DC busbar insulation. It utilizes a bridge balance method to provide direct, quantitative grounding resistance measurements via an integrated LCD display. This reliable solution helps prevent insulation degradation in critical infrastructure such as power plants, UPS systems, and electric vehicle charging stations.
Electrical Specifications
Operating Voltage Range
- ZJJ-4SA-220: 180-300V
- ZJJ-4SA-110: 90-150V
- Power Supply Current
- 10 mA
Performance Metrics
Key Performance Metrics
199.9 KΩ
Resistance Measurement Range
100 KΩ
Alarm Setting Range
5 %
Measurement Accuracy
Output & Relay
Output Contact Capacity
| Load Type | Capacity |
|---|---|
| Inductive (τ=5mS) | 0.2A DC220V |
| Resistive | 2A DC220V |
- Relay Capacity
- 10A @ 250Vac / 30Vdc
Features
- Key Features
- LCD DisplayPluggable TerminalsBridge Balance MethodStatic CircuitryReal-time Monitoring
Applications
- Typical Applications
- UPS SystemsEV Charging StationsPower PlantsSubstationsDC Motor Control
