ZJJ-4SC DC1500V high voltage LCD display DC insulation relay with 0-200Kohm resistance
Inquire NowDescription
The ZJJ-4SC DC1500V high voltage LCD display DC insulation relay is an advanced device designed for precise monitoring of insulation resistance in high voltage DC systems. Featuring a fully static circuit, this relay offers a highly sensitive grounding resistance monitoring and display mechanism, enabling users to quantitatively assess the insulation integrity of DC busbars. It continuously monitors the grounding resistance of both positive and negative busbars in real-time, providing immediate warnings if insulation levels fall below predefined thresholds.
Equipped with a full-hardware divider calculation circuit, the ZJJ-4SC allows for direct display of grounding resistance values, eliminating confusion associated with older models that lack visual output. The relay’s alarm threshold is also easily set and displayed, enhancing user experience. Designed for din rail installation, it finds widespread application in DC speed-regulating motors, solar power systems, and various other fields.
FEATURES
- Direct LCD display for positive and negative busbar grounding resistance values.
- Online display and direct setting of alarm resistance threshold.
- Bridge balance method for accurate resistance measurement.
- Pluggable terminals for easy maintenance and replacement.
- High reliability with reinforced shell and modular structure.
- Wide monitoring voltage range from 48-1500V, customizable working voltage of 24-220V.
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.
- Real-time monitoring in substations, power plants, transmission lines, and distribution lines.
Specifications
| Parameters | Symbol | Conditions | Min. | Typical | Max. | Units |
|---|---|---|---|---|---|---|
| Operating voltage range | Vo | ZJJ-4SC-220 | 100 | 220 | 350 | V |
| Power supply | Io | 85-265 Vac/dc | 7 | 10 | mA | |
| Relay capacity | VA | 2A@250vac | A | |||
| Resistance measurement range | Ro | 0.0 | 1999 | KΩ | ||
| Grounding short-circuit current | Io | Vo=2000V | 0.6 | mA | ||
| Measurement accuracy | Vo=1000V | 5% | ||||
| Alarm setting range | Rs | 0.0 | 990 | KΩ | ||
| Moves back coefficient | Rs=50KΩ | 95% | 98% | |||
| Output contact capacity | Inductive | τ=5mS | DC220V 0.2A | |||
| Resistive load | DC220V 2A |
