Article number: 70 942L
  • Insulation monitoring devices HIG*VDC(-L) are designed for the monitoring of the insulation status of DC IT systems with nominal voltage 12, 24, 48, 72 or 110 V DC.
  • The device continuously monitors the insulation status of both branches of the isolated IT system against a reference point. For stationary equipment this is usually the PE conductor, for mobile equipment it is the vehicle frame.
  • If the insulation condition in the positive branch R+ or negative branch R- is faulty, this condition is signalled by setting relay KA1/KA2. The fault condition is also indicated by LEDs on the front panel.
  • These devices are equipped with a display for showing the currently measured values. The display, together with the buttons is also used to set the device.
  • HIG24VDC(-L)/T, HIG48VDC(-L)/T, HIG72VDC(-L)/T, HIG110VDC(-L)/T are designed for railway use (EN 50155) to monitor the insulation condition of DC IT systems.
Monitored IT power supply system type according to IEC 61557-8 DC
Measuring range of insulation resistance RF 2 ÷ 550 kΩ
Adjustable range of critical insulation resistance Ran 2 ÷ 550 kΩ
Number of insulation resistance fault levels (Ran)
Rated voltage of monitored IT system (DC) Un 72 V
Nominal supply voltage DC Us 55 ÷ 90 V
IMD power supply From measured IT system
Power consumption P 2 VA
Measuring input’s internal impedance Zi > 55 kΩ
Internal DC resistance Ri > 55 kΩ
Measuring accuracy ± 10 %
Equipped with display Yes (OLED technology)
Supported module of distant signalisation (MDS) MDS-D, MDS-DELTA
Communication interface for user RS485 bus
Communication protocol ISOLGUARD
External control inputs Test start, Deblocking function
Housing material Polyamid PA6, UL94 V-0
Electrical strength against internal circuits 3 750 V
Degree of protection of front panel IP40
Degree of protection except the front panel IP20
Operating temperature ϑ - 25 ÷ 70 °C
Storage temperature - 40 ÷ 70 °C
Protection class according to IEC 61140 II
Recommended cross-section of connected conductors S 1 mm2
Installation On DIN rail 35 mm
Modular width 2
Recommended back-up fuse 6 A/gG
Use for traction No
Operating position Any
Operation type Permanent
Quick contact
Ing. Aneta Sčebelová
 +420 494 942 314