Insulation Monitoring Relay
EKRA-IMS-IMR-01

IMR-01 relay is used to monitor the level of insulation resistance of poles of DC networks with voltages of 220, 110, 24 V.

Features of IMR-01:

setting of “Alarm” value for insulation resistance of the network
indication of the state of the monitored network by output relays and LEDs
detection of the damaged network pole

Front view

IMR-01 relay is manufactured in a unified plastic enclosure with front wires connection. Fastening is carried out on a mounting DIN rail.

There is a switch on the front panel for specifying the “Alarm” setting and an LED indication displaying information about relay operation, the damaged network pole and LED indicating a reduction in voltage between poles below 0.5 U_RAT

Connection scheme for IMR-01 relay

Shipment

IMR-01 relay is supplied as a part of EKRA cabinets, as well as an independent device.

Installed in:

DC switchboards
DC cabinets
DC distribution cabinets
power supply cabinets of interlocking circuits of disconnectors
auxiliary power and alarm cabinets
backup power supply cabinets

Patent for invention

Insulation monitoring relay is protected by a patent for invention of the Russian Federation No.2381513

No maloperation of relay protection devices

Do not cause maloperation of relay protection devices due to the low level of voltage imbalance

Universal use and convenience

Detection of asymmetrical and symmetrical reduction of insulation level. All measurements are carried out without disconnecting consumers from the network

Compatibility

Compatible with equivalent standard T-bridge insulation resistance monitoring circuit

Specification	Value
Rated DC power supply voltage, V	220; 24
Rated voltage of monitored DC network, V	220	110	24
Operating range of voltages for monitored DC network of measurement circuits, V	175 – 245	85 – 125	18 – 36
Maximum capacity of monitored network relative to ground, µF, max.	200	100	20
Number of settings for insulation resistance of network poles relative to ground	1
Range of settings for insulation resistance of network poles relative to ground, kOhm	10 – 200	5 – 100	1 – 20
Maximum internal resistance between terminals of each pole of insulation resistance monitoring relay and ground, kOhm	30	15	3
Error of operation setting, %, max.	±10
Readiness time, s, max.	10

Insulation Monitoring Devices for DC networks

PDF

Insulation Monitoring Devices for DC networks

PDF

Insulation Monitoring RelayEKRA-IMS-IMR-01

Features

Specifications

Documents

Insulation Monitoring Relay
EKRA-IMS-IMR-01