The insulation monitoring device HIG91/QL produced by HAKEL for the ISOLGUARD series is designed for monitoring the insulation status of single-phase ungrounded IT power supply systems, are designed and operated according to standards IEC 61010-1:2010, EN 50522, IEC 61936-1:2010, IEC 61557-8:2007.
Device enables monitoring of single-phase IT power supplies systems up to the maximum operating voltage 275V AC, eventually 3x275V AC. If the insulation status monitoring of a single-phase IT power supply system with higher operating voltage is required, it is necessary to create an artificial centre using TL500 inductors produced by HAKEL. Such a created centre is connected to the terminal of insulation monitoring device HIG91/QL.
The insulation monitoring device 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.
HIG91/485/QL can communicate with the master computer via industrial RS485 bus with the protocol based on the PROFIBUS protocol.
Inbuilt signalling relay with switching contact enables alarm signalling for two independently set values of critical insulation resistance. The 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.
|Supply voltage range||Us||90 ÷ 265 V AC (47 ÷ 440 Hz) or 90 ÷ 370 V DC|
|Maximum IT power supply system operating voltage (without external inductor)||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||0.1 kΩ ÷ 90 kΩ|
|Measurement accuracy 5 kΩ … 10 kΩ||2 kΩ|
|Measurement accuracy 10 kΩ … 900 kΩ||± 10%|
|Critical insulation resistence||Rcrit||adjustable 0.1 kΩ až 90 kΩ|
|Insulation resistance hysteresis||Rhyst||adjustable 0 ÷ +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||250 V AC / 1A / 3750 Vef / 3750 Vef|
|Degree of protection according to IEC 60529||IP20|
|Method of assembly||DIN rail 35|
|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. 400A/m|
|Overvoltage category / testing voltage||III, according to IEC 60664-1:2007|
|Pollution degree||2, according to IEC 60664-1:2007|
|Article number||70 911QL|
|2D model (728.74 KB)||for registered only|
|3D model (469.2 KB)||for registered only|