The on-line insulation monitoring device of DC system balances the requirements of accuracy and safety of monitoring, and can detect all kinds of grounding fault, insulation decline, ring network state, AC series, DC interseries and other faults.The device combines the ping-pong principle and the passive monitoring principle in the active mode. Based on the multi-16-bit CPU parallel operation, the innovative distributed system architecture DADC and the advanced whole system analysis algorithm redefine the standard of the dc system grounding fault monitoring level.

technical parameter：

Can monitor the insulation impedance value range to the ground Ground impedance 0~50K
Insulation to reduction 51~500K
Voltage range can be monitored Positive side voltage 0~300V
Load voltage 0~300V
System total voltage 0~300V
AC string voltage 0~300V
Resist dc system distributed capacitance interference >10000uF
Suitable for DC system voltage grades 220V, 110V, 48V, 24V or user proposes other voltage grades
Number of DC circuits can be monitored 500 road
ground impedance value when the host is connected to the DC system > 1000K
Voltage monitoring error <0.5%
Ground insulation warning With YX output contact
System voltage low-definition warning 198V (with YX output contact)
System voltage high-definition warning 242V (with YX output contact)
Interface Standard RS232 / RS485 / RS422 Interface, Integrated Automation System, Scheduling Automation System Interface
Working ambient temperature -30 ° C - + 50 ° C
Relative humidity ≤ 95%
DC voltage allows the ripple voltage coefficient 2%