LINETRAXX® RCMA423
- AC/DC sensitive measured value acquisition type B
- 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.
- AC/DC sensitive measured value acquisition type B
- 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
- 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 mA…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)
Applications
- 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)
LINETRAXX® RCMA423 Variant(s)
| 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 |
* Absolute values
**(B7… = push-wire terminal / B9… = screw-type terminal)
Optional Accessories for LINETRAXX® RCMA423
Measuring current transformers
| Type | Internal diameter (mm) | Art. No. |
|---|---|---|
| CTUB101-CTBC20 | ø 20 | B78120010 |
| CTUB101-CTBC20P | ø 20 | B78120020 |
| CTUB101-CTBC35 | ø 35 | B78120012 |
| CTUB101-CTBC35P | ø 35 | B78120022 |
| CTUB101-CTBC60 | ø 60 | B78120014 |
| CTUB101-CTBC60P | ø 60 | B78120024 |
| CTUB101-CTBC120 | ø 120 | B78120016 |
| CTUB101-CTBC120P | ø 120 | B78120026 |
| CTUB101-CTBC210 | ø 210 | B78120018 |
| CTUB101-CTBC210P | ø 210 | B78120028 |
Connection cable measuring current transformer – RCMA423-D
| Type | Length/m | Art. No. |
|---|---|---|
| CTX-100 | 1 | B98110080 |
| CTX-250 | 2,5 | B98110081 |
| CTX-500 | 5 | B98110082 |
| CTX-1000 | 10 | B98110083 |
Accessories
| Type | Art. No. |
|---|---|
| Mounting clip for screw mounting (one piece per device) | B98060008 |
| Mounting frame XM420 | B990994 |
Downloads for LINETRAXX® RCMA423
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| RoHS/REACH Report - B74043023 | RoHS/REACH Report | 253.1 KB | 2024/09/0606.09.2024 | ||
| RCMA42x | CE Declarations of conformity | 88.7 KB | 2022/08/1212.08.2022 | ||
| RCMA423 | Manuals | 10.5 MB | DE | 2023/12/1414.12.2023 | D00063 |
| RCMA423 | Manuals | 10.5 MB | EN | 2023/12/1414.12.2023 | D00063 |
| RCMA423 | Datasheets | 10.3 MB | DE | 2024/07/3131.07.2024 | D00063 |
| RCMA423 | Datasheets | 10.3 MB | EN | 2024/07/3131.07.2024 | D00063 |
| RCMA423 | Datasheets | 334.5 KB | ES | 2020/09/0404.09.2020 | D00063 |
| RCMA423 | Datasheets | 530.3 KB | ZH | 2019/05/1313.05.2019 | D00063 |
| XM420-Schnittstellenoptionen | Datasheets | 264.1 KB | DE | 2019/05/1313.05.2019 | |
| XM420 interface options | Datasheets | 223.5 KB | EN | 2019/05/1313.05.2019 | D00051 |
| RCMA423 | Quickstarts | 510.8 KB | DE | 2023/11/1616.11.2023 | D00063 |
| RCMA423 | Quickstarts | 510.8 KB | EN | 2023/11/1616.11.2023 | D00063 |
| Changed variants of relays from goldplated to silver-plated contacts | Technical information | 166.3 KB | EN | 2022/06/2727.06.2022 | |
| Geänderte Relaisvarianten von vergoldeten Kontakten auf versilberte Kontakte | Technical information | 166.3 KB | DE | 2022/06/2727.06.2022 |