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.

Questions? Contact us!

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.

Questions? Contact us!

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