ISOMETER® isoRW425
- Ground-fault monitoring device for AC and DC IT systems
- Application control circuits in railway vehicles according to EN 50155
- Insulation impedance measurement (Z mode) for 50 Hz or 60 Hz
- Automatic adaptation to the system leakage capacitance up to 300 μF
- Measurement of the nominal system voltage (RMS) with undervoltage and overvoltage detection
The ISOMETER® isoRW425 monitors the insulation resistance of ungrounded AC, AC/DC and DC Systems (IT systems) for railway applications up to AC/DC 0…440 V. DC components existing in AC/DC systems do not influence the operating characteristics. An external supply voltage allows de-energized systems to be monitored too.
- Ground-fault monitoring device for AC and DC IT systems
- Application control circuits in railway vehicles according to EN 50155
- Insulation impedance measurement (Z mode) for 50 Hz or 60 Hz
- Automatic adaptation to the system leakage capacitance up to 300 μF
- Measurement of the nominal system voltage (RMS) with undervoltage and overvoltage detection
The ISOMETER® isoRW425 monitors the insulation resistance of ungrounded AC, AC/DC and DC Systems (IT systems) for railway applications up to AC/DC 0…440 V. DC components existing in AC/DC systems do not influence the operating characteristics. An external supply voltage allows de-energized systems to be monitored too.
Features
- Monitoring of the insulation resistance (R mode) or the insulation impedance (Z mode) of unearthed 3(N)AC, AC and
- DC systems (IT systems) with galvanically connected rectifiers or inverters
- Insulation impedance (Z mode) for 50 Hz or 60 Hz
- Measurement of the nominal system voltage (RMS) with undervoltage and overvoltage detection
- Measurement of DC voltages system to earth (L+/PE and L-/PE)
- Automatic adaptation to the system leakage capacitance up to 300 μF in R mode and 1μF in Z mode
- Automatic device self test with connection monitoring
- Selectable start-up delay, response delay and delay on release
- Two separately adjustable response ranges of 1…990 kΩ (Alarm 1, Alarm 2)
- Alarm signalling via LEDs (AL1, AL2), a display and alarm relays (K1, K2)
- N/C operation or N/O operation selectable
- Measured value indication via multifunctional LCD
- Fault memory can be activated
- RS-485 (galvanically isolated) interface including the following protocols:
– BMS interface (Bender measuring device - interface) for data exchange with other Bender components
– Modbus RTU
– isoData (for continuous data output) - Password protection to prevent unauthorised changes of parameters
Applications
- AC control circuits in industry, mechanical engineering, power stations, elevators, automation systems and railway systems in accordance with EN 50155
- AC control and auxiliary circuits in accordance with DIN EN 60204-1 “Electrical equipment of machines”, IEC 60204-1, EN 60204-1
- AC auxiliary circuits in accordance with DIN VDE 0100-725
- Smaller AC IT systems such as lighting systems, mobile generators
ISOMETER® isoRW425 Variant(s)
| Type | Nominal system voltage Un | Supply voltage US | Art. No.* |
|---|---|---|---|
| isoRW425-D4W-4 | 3(N)AC, AC 0…440 V/DC 0…440 V, 15…460 Hz | DC 24…240 V / AC 100…240 V, 47…63 Hz | B71037000W B91037000W |
*(B7… = push-wire terminal / B9… = screw-type terminal)
Optional Accessories for ISOMETER® isoRW425
| Type | Art. No. |
|---|---|
| Mounting clip for screw mounting (one piece per device) | B98060008 |
| Mounting frame XM420 | B990994 |
Downloads for ISOMETER® isoRW425
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| TÜV NORD - isoHV42x, AGH42x, isoHV52x, isoRW42x und VMx420 | Certificates | 431.9 KB | DE | 2023/01/1212.01.2023 | |
| TÜV NORD - isoHV42x, AGH42x, isoHV52x, isoRW42x and VMx420 | Certificates | 411.7 KB | EN | 2023/01/1212.01.2023 | |
| UKCA - isoxx425 | Declarations of Conformity | 142.1 KB | 2023/06/1212.06.2023 | ||
| isoXX425 | CE Declarations of Conformity | 146.2 KB | 2023/07/1414.07.2023 | ||
| isoRW425 | Quickstarts | 931.7 KB | EN | 2024/01/3030.01.2024 | D00052 |
| isoRW425 | Manuals | 4.2 MB | EN | 2023/09/2626.09.2023 | D00052 |
| isoRW425 | Datasheets | 284.2 KB | EN | 2020/06/2626.06.2020 | D00052 |
| Modbus RTU - Monitor isoxx425 V2.2.2 setup | Software | 7.1 MB | 2019/05/1313.05.2019 |