LINETRAXX® RCMA423
- AC/DC sensitive measured value acquisition type B
- For MRCD applications in combination with a circuit breaker
- Adjustable response values
- For protection of persons, fire protection, plant protection
The AC/DC sensitive residual current monitor RCMA423 is designed for monitoring earthed power supply systems (TN and TT systems) where smooth DC fault currents or residual currents continuously greater than zero may occur. These are in particular loads containing six-pulse rectifiers or one way rectifiers with smoothing, such as converters, battery chargers, construction site equipment with frequency-controlled drives. Currents in single conductors can also be monitored by RCMA423.
The prewarning stage (50…100 % of the set response value IΔn2) allow to distinguish between prewarning and alarm. Since the values are measured with measuring current transformers, the device is nearly independent of the load current and the nominal voltage of the system.
- Features
- Applications
- Accessories
- Ordering information
- Downloads
- AC/DC sensitive residual current monitor Type B acc. to IEC 62020 and IEC/TR 60755
- r.m.s. value measurement (AC+DC)
- Two separately adjustable response values 30…3 A
- Frequency range 0…2000 Hz
- Start-up delay, response delay and delay on release
- Digital measured value display via LC display
- Measured value memory for operating value
- CT connection monitoring
- LEDs: Power On, Alarm 1, Alarm 2
- Internal/external test/reset button
- Two separate alarm relays (one changeover contact each)
- N/O or N/C operation and fault memory behaviour selectable
- Continuous self monitoring
- Multi-functional LC display
- Password protection for device settings
- Sealable transparent cover
- Push-wire terminal (two terminals per connection)
- Two-module enclosure (36 mm)
- AC/DC sensitive residual current monitoring in earthed two, three or four conductor systems (TN and TT systems)
- Monitoring of variable-speed drives, UPS systems, construction site equipment, printing machines, battery systems, laboratory equipment, wood working machines, MF welding systems, furniture industry, medical electrical equipment, etc.
- AC/DC sensitive current monitoring of single conductors de-energised under normal conditions (e.g. N and PE conductors)
Optional accessories for LINETRAXX® RCMA423
| Type | Internal diameter (mm) | Art. No. |
|---|---|---|
| W20AB | ø 20 | B98080008 |
| W35AB | ø 35 | B98080016 |
| W60AB | ø 60 | B98080026 |
| W120AB | ø 120 | B98080041 |
| W210AB | ø 210 | B98080040 |
Connection cable measuring current transformer – RCMA423-D
| Type | Length/m | Art. No. |
|---|---|---|
| WX-100 | 1 | B98080503 |
| WX-250 | 2,5 | B98080504 |
| WX-500 | 5 | B98080505 |
| WX-1000 | 10 | B98080511 |
Accessories
| Type | Art. No. |
|---|---|
| Mounting clip for XM420 enclosure | B98060008 |
| Snap-on mounting W20…, W35… | B98080501 |
| Snap-on mounting W60… | B98080502 |
Variants of LINETRAXX® RCMA423
| Type | Response range IΔn | Frequency range | Supply voltage US* | Art. No.** |
|---|---|---|---|---|
| RCMA423-D-1 | 30 mA…3 A | 0…2000 Hz | DC 9,6…94 V / AC 16…72 V, 42…460 Hz | B74043023 B94043023 |
| RCMA423-D-2 | 30 mA…3 A | 0…2000 Hz | DC 70…300 V / AC 70…300 V, 42…460 Hz | B74043025 B94043025 |
**(B7… = push-wire terminal / B9… = screw-type terminal)
Downloads for LINETRAXX® RCMA423
| Category | Prodotto | Language | Date | Size | Download |
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