LINETRAXX® RCMA423
- Ground-fault monitor for grounded and high-resistance grounded AC/DC systems
- Modular installation using a single external current transformer
- Works with AC/DC power conversion equipment including variable frequency drives
- Digital display with real-time readings
- Configurable Form-C (SPDT) relay contacts
The RCMA423 monitors for ground-fault current in solidly-grounded and high-resistance-grounded AC/DC (single-phase or three-phase) systems. The RCMA423 is also compatible with systems that contain power conversion equipment, such as variable frequency drives and inverters.
The pickup value is adjustable from 30 mA to 3 A (for a lower pickup value, refer to RCMA420 series). A separately configurable pre-warning alarm is also available. Three separately adjustable time delays are included - a pickup delay, startup delay, and delay on reset.
The RCMA423 provides an accurate, RMS value. Measurements are displayed in real-time via the device's on-board digital display. All device are configured using the display and push buttons. Two Form-C (SPDT) relay outputs are separately configurable to trigger on pre-warning or main alarms.
A single current transformer connects to the RCMA423 for measuring ground-fault current. A wide range of sizes are available.
- Ground-fault monitor for grounded and high-resistance grounded AC/DC systems
- Modular installation using a single external current transformer
- Works with AC/DC power conversion equipment including variable frequency drives
- Digital display with real-time readings
- Configurable Form-C (SPDT) relay contacts
The RCMA423 monitors for ground-fault current in solidly-grounded and high-resistance-grounded AC/DC (single-phase or three-phase) systems. The RCMA423 is also compatible with systems that contain power conversion equipment, such as variable frequency drives and inverters.
The pickup value is adjustable from 30 mA to 3 A (for a lower pickup value, refer to RCMA420 series). A separately configurable pre-warning alarm is also available. Three separately adjustable time delays are included - a pickup delay, startup delay, and delay on reset.
The RCMA423 provides an accurate, RMS value. Measurements are displayed in real-time via the device's on-board digital display. All device are configured using the display and push buttons. Two Form-C (SPDT) relay outputs are separately configurable to trigger on pre-warning or main alarms.
A single current transformer connects to the RCMA423 for measuring ground-fault current. A wide range of sizes are available.
Features
- Ground-fault monitoring for solidly-grounded and high-resistance-grounded AC/DC systems
- Meets or exceeds code requirements for ground-fault detection on grounded AC/DC systems, where applicable
- Works on systems with power conversion equipment, including variable frequency drives and inverters
- RMS measurement values
- Digital display showing measured ground-fault current in real-time
- Adjustable pickup value from 30 mA to 3 A
- Connects to a single current transformer, available in a wide range of sizes
- On-board test and reset buttons with connections for external activation
- Adjustable time delays (pickup, startup, on reset)
- Latching or non-latching operation
- Two Form-C (SPDT) alarm outputs, operating normally energized (failsafe) or de-energized (non-failsafe)
Applications
- Ground-fault monitoring on grounded and high-resistance grounded AC/DC systems
- General power distribution
- Motors and motor control centers
- Generators, portable and fixed
- Control systems
- Heat trace systems, per NEC 427.22 and CEC 62-116
- Battery backup systems
- Grounded solar arrays, per NEC 690.41(B) (2017 edition), NEC 690.5 (2014 edition), and CEC 64-064(4)
- Energy storage systems
LINETRAXX® RCMA423 Variant(s)
| Part No. | Supply Voltage | Ordering No. |
|---|---|---|
| RCMA423-D-1 | 16-72 VAC (42-460 Hz), 9.6-94 VDC | B94043023 |
| RCMA423-D-2 | 70-300 VAC (42-460 Hz), 70-300 VDC | B94043025 |
Optional Accessories for LINETRAXX® RCMA423
Connection cable for use with RCMA420/423 and CTUB100 series current transformers
| Part No. | Length | Ordering No. |
|---|---|---|
| CTX-100 | 3' (1m) | B98110080 |
| CTX-250 | 8' (2.5m) | B98110081 |
| CTX-500 | 16' (5m) | B98110082 |
| CTX-1000 | 32' (10m) | B98110083 |
Enclosure mountings
| Part No. | Ordering No. |
|---|---|
| XM420 | B990994 |
| XM460 | B990995 |
| XM490 | B990996 |
AC/DC current transformers
| Part No. | Opening | Shape and Type | Ordering No. |
|---|---|---|---|
| CTUB101-CTBC20 | 0.78" (20mm) | circular, solid | B78120010 |
| CTUB101-CTBC20P | 0.78" (20mm) | circular, solid | B78120020 |
| CTUB101-CTBC35 | 1.35" (35mm) | circular, solid | B78120012 |
| CTUB101-CTBC35P | 1.35" (35mm) | circular, solid | B78120022 |
| CTUB101-CTBC60 | 2.4" (60mm) | circular, solid | B78120014 |
| CTUB101-CTBC60P | 2.4" (60mm) | circular, solid | B78120024 |
| CTUB101-CTBC120 | 4.7" (120mm) | circular, solid | B78120016 |
| CTUB101-CTBC120P | 4.7" (120mm) | circular, solid | B78120026 |
| CTUB101-CTBC210 | 8.25" (210mm) | circular, solid | B78120018 |
| CTUB101-CTBC210P | 8.25" (210mm) | circular, solid | B78120028 |
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 | EN | 2023/12/1414.12.2023 | D00063 |
| RCMA423 | Datasheets | 10.3 MB | EN | 2024/07/3131.07.2024 | D00063 |
| RCMA423 | Quickstarts | 510.8 KB | EN | 2023/11/1616.11.2023 | D00063 |
| XM420 interface options | Datasheets | 223.5 KB | EN | 2019/05/1313.05.2019 | D00051 |
| Changed variants of relays from goldplated to silver-plated contacts | Technical Information | 166.3 KB | EN | 2022/06/2727.06.2022 |