Article number: 70 970
  • The HIG99 line of insulation monitoring devices is designed for monitoring DC, AC and combined IT systems.
  • The devices monitor the insulation resistance in the range from 1 kΩ to 10 MΩ and are equipped with two output relays, for signaling the failure of two independent levels of insulation resistance.
  • The IMDs are powered by an independent low voltage source and have an integrated function of monitoring the correct voltage value of the isolated system.
  • The devices are designed for primary supervision of IT systems in industry and traction systems, both on stationary and mobile parts.
  • The HIG99 series is designed and tested according to the standards of the EN 50155 series.
  • Communication with HIG99 is possible using modern digital buses, using expansion communication modules for the HIG99 KM series.
  • The maximum operating voltage of the monitored IT network can be increased by using specific coupling units from the HIG-CD series.
Monitored IT power supply system type according to IEC 61557-8 AC, DC, AC/DC
Measuring range of insulation resistance RF 1 ÷ 10 000 kΩ
Adjustable range of critical insulation resistance Ran 1 ÷ 2 500 kΩ
Number of insulation resistance fault levels (Ran)
Rated voltage of monitored IT system (DC) Un 1 000 V
Rated voltage of monitored IT system (AC) Un 710 V
IMD power supply From independent power source
Nominal supply voltage DC Us 24 V
Supply voltage range 9 ÷ 36 V
Power consumption P 8 VA
Measuring voltage Um 40 V
Measuring current Im < 0.5 mA
Measuring input’s internal impedance Zi > 1 000 kΩ
Internal DC resistance Ri > 1 000 kΩ
System leakage capacitance Ce 10 µF
Measuring accuracy ± 15 %
Electrical strength against internal circuits 3 000 V
Supported module of distant signalisation (MDS) None
Communication interface for user Using communication modules of the HIG99 KM series
Usable with coupling units HIG-CD 1k8
Housing material Polyamid PA6, UL94 V-0
Degree of protection of front panel IP40
Degree of protection except the front panel IP20
Operating temperature ϑ - 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 6
Use for traction Yes
Recommended back-up fuse 6 A/gG
Operating position Any
Operation type Permanent
Quick contact
Ing. Aneta Sčebelová
 +420 494 942 314