ISOMETER® isoRW425
- Insulation 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® monitors the insulation resistance (R mode) or the insulation impedance (Z mode) of unearthed AC/DC main circuits (IT systems) with nominal system voltages of 3(N)AC, AC, AC/DC or DC 0…440 V. DC components existing in 3(N)AC, AC/DC systems do not influence the operating characteristics when a minimum load current of DC 10 mA flows. Due to the separate supply voltage, de-energised systems can also be monitored. The maximum permissible system leakage capacitance Ce is 300 μF in R mode and 1μF in Z mode.
- Features
- Applications
- Accessories
- Ordering information
- Downloads
- 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
- 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
Optional accessories for ISOMETER® isoRW425
| Type | Art. No. |
|---|---|
| Mounting clip for screw mounting (1 piece per device) | B98060008 |
Variants of ISOMETER® isoRW425
| 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)
Downloads for ISOMETER® isoRW425
| Category | Product | Language | Size | Download |
|---|