The insulation monitoring devices HIG91 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 HIG91.
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 MDS10T, MDS-DELTA or MDS-D remote monitoring modules of the monitored power supply system status produced by HAKEL.
HIG91 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.
One or two built-in signalling relays with a switch contact enable the connection of equipment for signalling of alarm. The insulation monitoring device has an optional alarm memory function with the option to cancel the alarm using the button on the insulation monitoring device. Local and remote testing of the function of the insulation monitoring device can also be conducted.
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 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||> 1 MΩ|
|Displayed value’s range||Risol||5 kΩ ÷ 900 kΩ|
|Measurement accuracy 5 kΩ … 10 kΩ||2 kΩ|
|Measurement accuracy 10 kΩ … 900 kΩ||± 10%|
|Critical insulation resistence||Rcrit||adjustable 5 kΩ ÷ 300 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 Vrms / 3750 Vrms|
Terminals for connection of the MDS10T(+MPS) module produced by Hakel max 5 x MPS10T modules or max 2 MDS10T+MPS modules
RS485 line or MDS-D remote monitoring display module / MDS-DELTA modules from HAKEL production
|Communication line: RS485 type MASTER-SLAVE, 9600 Bd, even count parity / Insulating strength to the internal circuits and to the network circuits||2500 Vrms|
|Degree of protection according to IEC 60529||IP20|
|Housing material||PA-UL94 V0|
|Method of assembly||DIN rail 35|
|Recommended section of the connected conductors||S||1 mm2|
|Operating temperature||ϑ||-10°C ÷ +60°C|
|Atmospheric pressure||86 ÷ 106 kPa|
|External magnetic and electric field||according to IEC 61326-2-4|
|Overvoltage category / testing voltage||III, according to IEC 60664-1:2007|
|Pollution degree||2, according to IEC 60664-1:2007|
|Article number||70 911|
|Installation instructions (219.71 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|