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.
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.
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)
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 |
Name | Category | Size | Language | Timestamp | D-/B-Number |
---|---|---|---|---|---|
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 |