HIG97

The insulation monitoring device HIG97 produced by HAKEL for the ISOLGUARD series is designed to monitor the insulation status of three-phase IT power supply systems, where extremely fast evaluation and signalling of the monitored system status is required. HIG97 devices are designed and operated according to standards IEC 61010-1:2010, EN 50522 and IEC 61936-1:2010.

Using an external TL1200 inductor to create an artificial centre enables the device to monitor three-phase IT power supply systems up to the maximum operating voltage 3×1000 V AC. So created centre is connected to the terminal of HIG97 insulating monitoring device.

The insulation monitoring device is equipped with display showing the measured insulation resistance values. Further there are parameter setting push-buttons and LED indicator lamps indicating the status of monitored IT power supply system and the device itself. HIG97 can communicate with a master computer via RS485 industrial bus using protocol based on the PROFIBUS protocol. Built in signalling relays enable to connect equipment for supervising and signalling monitored IT power supply system status. Device includes four signalling relays.

FAULT1 fast-response signalling relay signals current status of monitored IT power supply system.

FAULT1 MEM fast-response signalling relay with memory signals the first fault of monitored IT power supply system. Operator’s intervention is required to remove the fault status. This signalling relay will preserve its configuration even if the device is switched off and on again.

FAULT2 slow-response signalling relay signals the status of monitored IT power supply system. In device’s parameter menu can be selected relay’s function with or without memory. If the function with memory is selected, operator must cancel the signalling manually. Switching the power supply off brings the FAULT2 relay to its basic configuration.

ERR signalling relay signals the function of the device itself. The relay is released if device is on and monitored IT power supply system measurement proceeds.

It is possible to perform both on-site and remote device function test.

No more than one insulation monitoring device may be connected to an IT power supply system.

Basic characteristics

• Fast response insulation monitoring device for AC systems with voltage 230 VAC / 500VAC / 1000VAC
• Fast-response signalling relay of current insulation resistance status
• Fast-response signalling relay of insulation resistance status with memory; the fault status must be cancelled manually by push-button on the device or remote button
• Slow-response signalling relay of insulation resistance status memory; the fault status must be cancelled manually by push-button on the device or remote button
• Device function signalling relay
• Display of the measured insulation resistance Risol in the range 5 kΩ to 900 kΩ or 200 kΩ to 5 MΩ
• Connection to RS485 bus, insulation strength 2500 Vrms against the internal circuits and network circuits
• Option to set monitored insulation resistance R_crit1 using the display and push-buttons in the range from 5 kΩ to 300 kΩ
• Adjustable hysteresis of the insulation resistance limit value in the range 0 – 100 % using the display and push-buttons
• Adjustable response delay t_ON1 of the FAULT1 fast-response signalling relay in the range 0 – 9.99 sec with a 0.01 sec step
• Adjustable response delay t_ON2 of the FAULT2 slow-response signalling relay in the range 0 – 60 sec with a 1 sec step
• Adjustable response delay t_START of the FAULT1 and FAULT2 signalling relays after activating the device
• Access to the IMD parameter setting with the pushbuttons can be locked/unlocked by a button combination
• Separate supply voltage also allows to monitor IT power supply systems, which are not under voltage
• Two modules 2M width, total width 4M (72mm) for assembling on DIN rail 35