The insulation monitoring devices HIG94 produced by HAKEL for the ISOLGUARD series are designed for monitoring the insulation status of single-phase and 3-phase ungrounded IT power supply systems, are designed and operated according to standards IEC 61010-1:2010, EN 50522, IEC 61936-1:2010.
Devices enable monitoring of single-phase and 3-phase ungrounded IT power supplies systems up to the maximum operating voltage 275V AC, eventually 3x275V AC. If the insulation status monitoring of a single-phase or 3-phase ungrounded IT power supply system with higher operating voltage is required, it is necessary to create an artificial centre using TL* inductors produced by HAKEL. Such a created centre is connected to the terminal of insulation monitoring device HIG94.
The insulation monitoring devices enables to display the numeric value of the measured insulation resistance, than there are buttons for setting module parameters and signalling LED diodes for displaying the status of monitored power supply system and of the device. To the insulation monitoring device it is possible to connect MDS-D and MDS-DELTA remote monitoring modules of the monitored power supply system status produced by HAKEL.
HIG94 devices are equipped with RS485 communication line and can communicate with the master computer via industrial RS485 bus with the protocol based on the PROFIBUS protocol. Description of the protocol is available on request.
Two inbuilt signalling relays with switching contacts enables alarm signalling for two independently set values of critical insulation resistance. The insulation monitoring device has an optional alarm memory function with the option to terminate the alarm using the button on the insulation monitoring device. Local and remote testing of the insulation monitoring device function can be done.
Only one insulation monitoring device can be connected to the same ungrounded IT power supply system.
|Supply voltage range||Us||90 - 265 V AC or 90 - 370 V DC|
|Maximum operating voltage of the monitored ungrounded IT power supply system||Un||275 V AC|
|Power consumption||P||max. 5 VA|
|Measuring voltage||Um||12 V DC|
|Measuring current||Im||< 0,6 mA|
|Internal resistance of the measuring input||Zi||> 2 MΩ|
|Displayed value’s range||Risol||200 kΩ - 5 MΩ|
|Measurement accuracy 200 kΩ … 1 MΩ||± 10%|
|Measurement accuracy 1 MΩ … 5 MΩ||± 15%|
|Critical insulation resistence||Rcrit||adjustableý 200 kΩ - 900 kΩ|
|Insulation resistance hysteresis||Rhyst||adjustable 0 až +100% Rcrit|
|Delay in response of signalling||tON||adjustable 0 - 60 sec.|
|Signalling relay 1/ Signalling potential-free switching contact / Electric strength to the internal circuits and supply circuits||
230 V AC / 1A
|Signalling relay 2 / Signalling potential-free switching contact / Electric strength to the internal circuits and supply circuits||
230 V AC / 1A
|Communication line: RS485 type MASTER-SLAVE, 9600 Bd, even count parity / Insulating strength to the internal circuits and to the network circuits||
|Degree of protection according to IEC 60529||IP20|
|Housing material||PA-UL94 V0|
|Method of assembly||DIN rail 35 mm|
|Recommended section of the connected conductors||S||1 mm2|
|Operating temperature||ϑ||-10°C ~ +60°C|
|Relative humidity||28 g H2O /kg suchého vzduchu|
|Atmospheric pressure||86 - 106 kPa|
|External magnetic and electric field||max. 400 A/m|
|Overvoltage category / testing voltage||III according IEC 60664-1:2007|
|Pollution degree||2 according IEC 60664-1:2007|
|Installation instructions (214.51 KB)|
|2D model (728.74 KB)||for registered only|
|3D model (469.2 KB)||for registered only|
|EC declaration of conformity (83.77 KB)||for registered only|