ISOMETER® IRDH275BM-7 with AGH675S-7…
- Insulation monitoring device for AC and DC IT systems
- Application for drives including medium voltage converters up to 15.5 kV
- In combination with AGH675S-7 and AGH675S- MV15
- History memory with real-time clock for storing alarm messages with date and time
- Galvanically isolated RS-485 interface for data exchange
The device combination ISOMETER® IRDH275BM-7 and the coupling device AGH675S-7 or the coupling devices AGH675S-7MV15 is designed to monitor the insulation resistance of unearthed medium voltage systems (IT systems). It is suitable for universal use in 3AC, combined AC/DC and DC systems. AC systems may include extensive DC-supplied loads. The AMPPlus measurement method meets the particular requirements of modern power supplies which often include rectifiers, converters, thyristor-controlled DC drives and directly connected DC components. Taking the system leakage capacitances into account, the IRDH275BM-7 automatically adapts itself to the existing system conditions in order to optimise the measuring time.
- Features
- Applications
- Accessories
- Ordering information
- Downloads
- Insulation monitoring for drives including medium voltage converters up to 15.5 kV
- Two separately adjustable response values 100 kΩ…10 MΩ
- AMPPlus measurement method (European patent: EP 0 654 673 B1)
- Automatic adaptation to the system leakage capacitance
- Info button to display device settings and the system leakage capacitance
- History memory with real-time clock to store alarm messages with date and time stamp
- BMS interface (Bender Measuring Device Interface) for communication with other Bender devices (RS-485 electrically isolated)
- Current output 0(4)…20mA (electrically isolated) analogously to the measured insulation value
- Self monitoring with automatic alarm
- Automatic self test, selectable
- Connection for external kΩ indication
- Test and reset button
- Connection external test and reset button
- Two separate alarm relays with two potential-free changeover contacts
- N/O or N/C operation, selectable
- Backlit two-line plain text display
- Remote setting of specific parameters via Internet (option; COM460IP with at least Option C required)
- AC, DC or AC/DC medium voltage systems
- AC/DC medium voltage systems with directly connected DC components, such as rectifiers, converters, and thyristor-controlled DC drives
Optional accessories for ISOMETER® IRDH275BM-7 with AGH675S-7…
External kΩ measuring instruments (20 mA)
| Type | SKMP *2 | Art. No. |
|---|---|---|
| 9620-1721 | 2,8 MΩ | B986849 |
Variants of ISOMETER® IRDH275BM-7 with AGH675S-7…
| Type | Nominal voltage | Supply voltage | Cable length | Art. No. |
|---|---|---|---|---|
| IRDH275BM-7 | -- | AC 19.2…55 V / DC 19.2…72 V | -- | B91065120 |
| AGH675S-7-2000 | AC/DC 0…7.2 kV, 0…460 Hz | -- | 2000 mm | B913061 |
| AGH675S-7-500 | AC/DC 0…7.2 kV, 0…460 Hz | -- | 500 mm | B913060 |
| AGH675S-7MV15-500 | AC/DC 0…15.5 kV, 0…460 Hz | -- | 500 mm | B913058 |
Downloads for ISOMETER® IRDH275BM-7 with AGH675S-7…
| Category | Product | Language | Date | Size | Download |
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