Overview
JY1000-ST Insulation Monitoring Relay is used in DC systems such as electric vehicle DC charging systems, photovoltaic systems, energy storage systems, and DC power grids.
Feature of the insulation monitoring relay
- Widely power supply range (10-30V)
- Widely insulation monitoring range (100V~1000VDC)
- Insulation monitoring equipment self-test
- Adaptive capacitance to ground
- Convenient parameter setting
- Remote monitoring and management
- Monitor positive and negative poles
- Ground insulation resistance
- Voltage reverse polarity alarm
- Real-time monitoring of insulation resistance
- Din Rail mounting or screw fixing.
- Insulation monitoring equipment self-test
- RS485 remote monitoring and management
- The internal resistance of the insulation monitoring module to ground is 3MΩ or 600KΩ.
- Monitoring accuracy can be as high as within 1%.
Working principle of JY1000-ST Insulation Monitoring Relay
The JY1000-ST insulation monitoring relay adopts the bridge method circuit, as shown in the figure below. After the insulation monitoring is powered on, the grounding switch K is turned off by default. After the insulation monitoring is turned on, the grounding switch K is closed, and the insulation resistance value of the positive and negative poles to the ground or the voltage value of the positive and negative poles to the ground can be read. When the insulation monitoring is turned on, the low voltage or insulation resistance data is updated in real time. The update period of the positive and negative insulation resistance data is 0.7s~2s, and the update period of the positive and negative electrodes to ground voltage is 100ms. After the insulation monitoring is turned off, the grounding switch K is opened, and thereafter it has no valid value for low voltage or insulation resistance.
