Insulation monitoring system consists of the IMD-01 head unit and DCS differential current sensors.
IMD-01 performs:
- continuous monitoring of the level of insulation resistance of poles relative to the ground at the facility,
- automatic detection of bays with damaged insulation (for bays with installed DCS differential current sensors).
All measurements and monitoring of parameters are carried out without disconnecting consumers from the network.
After receiving information about reduction in the insulation resistance level, the damaged feeder can be detected manually by measuring the resistance of each bay in turn using the EKRA-IMS-PIM portable insulation monitoring device.
Operation panel
Insulation resistance of poles of the network is monitored by the EKRA-IMS IED by measuring voltages at the poles of the network relative to the ground, as well as the current flowing between terminals “KE” and “PE” using the built-in current sensor.
Operation panel of the IED displays the state of insulation of bays and whole DС system, as well as information about a failure of the insulation monitoring system.
In addition, measured, calculated and obtained values can be transmitted to the PCS via the Ethernet interface using the IEC 60870-5-104, Modbus TCP protocols.
Differential current sensors
Differential current sensors are permanently installed, one for each controlled bay.
Each sensor measures the differential current of its bay. Sensor configuration, as well as information exchange with the head unit are carried out via the RS-485 interface.
Sensors are equipped with LEDs to detect insulation reduction at the bay, as well as a sensor failure.
Connection scheme for IMD-01 head unit and DCS differential current sensors
Shipment
EKRA-IMS can be supplied as part of DC cabinets and switchboards with a voltage of 220 (110) V, as well as an independent device.
Also installed in:
- interlocking circuits
- control systems and auxiliary DC networks of industrial enterprises
- solar power plants and photovoltaic systems
- industrial electrolysis installations (production of aluminum, hydrogen, etc.) and other technological systems in metallurgy
- power supply and DC networks of electrical installations for ships, rolling stock, air transport and electric vehicles
- medical electrical installations
- uninterruptible power supplies and battery systems
- charging stations for electric vehicles