HIG91/QL
Article number: 70 911QL- The HIG91, HIG92, HIG93, and HIG94 series are a series of insulation monitoring devices for industrial isolated systems (IT systems).
- The maximum operating voltage of the IT system is 275 V AC. This voltage can be increased up to 6 kV when using coupling devices from the TL series.
- IMD with one Ran error level (HIG91, HIG92 series) or monitors with two error levels (HIG93, HIG94 series) are available.
- As standard, the IMD measure RF in the range of 5 kΩ to 900 kΩ (HIG91, HIG93 series), alternatively in the range of 200 kΩ to 5 MΩ (HIG92, HIG94). Special IMDs are also available for different measuring ranges of insulation resistance.
- IMDs are equipped with digital processing of the measured signal, which offers the user numerical information about the measured insulation resistance.
- IMDs are designed with independent power supply. That means that these insulation monitors can be powered from a different system than the one they measure. This has the significant effect that the IMDs are able to measure even de-energized system.
- The power supply of the device is AC as standard, for a nominal voltage of 230 V to 110 V / 50 Hz. However, versions with a 24 V DC supply are also available.
- All IMDs are equipped with a digital bus, which allows information to be transmitted to the master system. For signaling of the IMD status, panels from the MDS-D series can also be used (variant with RS485).
| Monitored IT power supply system type according to IEC 61557-8 | AC | |
| Measuring range of insulation resistance | RF | 0.1 ÷ 90 kΩ |
| Adjustable range of critical insulation resistance | Ran | 0.1 ÷ 90 kΩ |
| Number of insulation resistance fault levels (Ran) | 1 | |
| Rated voltage of monitored IT system (AC) | Un | 275 V |
| IMD power supply | From measured IT system, From independent power source | |
| Nominal supply voltage AC | Us | 90 ÷ 265 V |
| Nominal supply voltage DC | Us | 90 ÷ 370 V |
| Power consumption | P | 5 VA |
| Measuring voltage | Um | 12 V |
| Measuring current | Im | < 0.6 mA |
| Measuring input’s internal impedance | Zi | > 2 000 kΩ |
| Measuring accuracy | ± 10 % | |
| Electrical strength against internal circuits | 3 750 V | |
| Equipped with display | Yes (OLED technology) | |
| Supported module of distant signalisation (MDS) | MDS-D, MDS-DELTA, MDS10 | |
| Communication interface for user | RS485 bus | |
| Communication protocol | ISOLGUARD, PROFIBUS | |
| External control inputs | Test start, Deblocking function | |
| 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 | - 25 ÷ 60 °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 | |
| Use for traction | No | |
| Operating position | Any | |
| Operation type | Permanent |