LINETRAXX® RCM420
- Ground-fault monitor for grounded and high-resistance-grounded AC systems
- Modular installation using a single external current transformer
- RMS measurements
- Digital display with real-time readings
- Configurable Form-C (SPDT) contact outputs
The RCM420 monitors for ground-fault current in solidly-grounded and high-resistance-grounded AC (single-phase or three-phase) systems. The pickup value is adjustable from 10 mA to 10 A. A separately configurable prewarning alarm is also available. Three separately adjustable time delays are available - a pickup delay, startup delay, and delay on reset.
The RCM420 provides an accurate, RMS value. Measurements are displayed in real-time via the device's on-board digital display. All device settings are configured using the display and push buttons. Two Form-C (SPDT) relay outputs are separately configurable to trigger on the pre-warning or main alarm.
A single current transformer connects to the RCM420 for measuring ground-fault current. A wide range of sizes, shapes, and core types are available.
- Ground-fault monitor for grounded and high-resistance-grounded AC systems
- Modular installation using a single external current transformer
- RMS measurements
- Digital display with real-time readings
- Configurable Form-C (SPDT) contact outputs
The RCM420 monitors for ground-fault current in solidly-grounded and high-resistance-grounded AC (single-phase or three-phase) systems. The pickup value is adjustable from 10 mA to 10 A. A separately configurable prewarning alarm is also available. Three separately adjustable time delays are available - a pickup delay, startup delay, and delay on reset.
The RCM420 provides an accurate, RMS value. Measurements are displayed in real-time via the device's on-board digital display. All device settings are configured using the display and push buttons. Two Form-C (SPDT) relay outputs are separately configurable to trigger on the pre-warning or main alarm.
A single current transformer connects to the RCM420 for measuring ground-fault current. A wide range of sizes, shapes, and core types are available.
Features
- Ground fault monitoring for solidly-grounded and high-resistance-grounded AC systems
- Meets or exceeds code requirements for ground-fault detection on grounded AC systems, where applicable
- RMS measurement values
- Digital display showing measured ground-fault current in real-time
- Adjustable pickup value from 10 mA to 10 A
- Connects to a single current transformer, available in a wide range of sizes, shapes, and core types
- 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 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
LINETRAXX® RCM420 Variant(s)
| Part No. | Supply Voltage | Ordering No. |
|---|---|---|
| RCM420-D-1 | 16-72 VAC (42-460 Hz), 9.6-94 VDC | B94014001 |
| RCM420-D-2 | 70-300 VAC (42-460 Hz), 70-300 VDC | B94014002 |
Optional Accessories for LINETRAXX® RCM420
AC current transformers
| Part No. | Opening | Shape and Type | Ordering No. |
|---|---|---|---|
| CTAC20 | 0.78" (20mm) | circular, solid | B98110005 |
| CTAC35 | 1.35" (35mm) | circular, solid | B98110007 |
| CTAC60 | 2.4" (60mm) | circular, solid | B98110017 |
| CTAC120 | 4.7" (120mm) | circular, solid | B98110019 |
| CTAC210 | 8.25" (210mm) | circular, solid | B98110020 |
| WR70x175S | 70 x 175 mm | rectangular, solid | B911738 |
| WR115x305S | 115 x 305 mm | rectangular, solid | B911739 |
| WR150x350S | 150 x 350 mm | rectangular, solid | B911740 |
| WR200x500S | 200 x 500 mm | rectangular, solid | B911763 |
| WR70x175SP | 70 x 175 mm | rectangular, solid | B911790 |
| WR115x305SP | 115 x 305 mm | rectangular, solid | B911791 |
| WR150x350SP | 150 x 350 mm | rectangular, solid | B911792 |
| WR200x500SP | 200 x 500 mm | rectangular, solid | B911793 |
| WS20x30 | 0.75"x1.2" (20x30mm) | rectangular, split-core | B98080601 |
| WS50x80 | 2"x3.1" (50x80mm) | rectangular, split-core | B98080603 |
| WS80x120 | 3.1"x4.7" (80x120mm) | rectangular, split-core | B98080606 |
Accessories
| Type | Art. No. |
|---|---|
| Mounting clip for screw mounting (one piece per device) | B98060008 |
| Mounting frame XM420 | B990994 |
Downloads for LINETRAXX® RCM420
| Name | Category | Size | Language | Timestamp | D-/B-Number |
|---|---|---|---|---|---|
| UKCA - RCM42x | Declarations of Conformity | 122.4 KB | 2023/02/1313.02.2023 | ||
| RCM42x | CE Declarations of Conformity | 88.0 KB | 2023/10/1919.10.2023 | ||
| RCM420 | Manuals | 11.2 MB | EN | 2024/09/0505.09.2024 | D00057 |
| RCM420 | Datasheets | 10.5 MB | EN | 2024/09/0505.09.2024 | D00057 |
| RCM420 | Quickstarts | 1.0 MB | EN | 2024/09/0505.09.2024 | D00057 |
| 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 |