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BENDER GmbH & Co KG
LINETRAXX® RCMA423

LINETRAXX® RCMA423

Product catalog summary

Device Overview
The LINETRAXX® RCMA423 is a residual current monitor designed for monitoring AC and pulsed DC currents in TN and TT systems. It is sensitive to residual currents ranging from 30 mA to 3 A and complies with IEC 62020 and IEC 60755 standards.

Key Features

AC/DC sensitive residual current monitoring (Type B).
Two adjustable response ranges for prewarning and alarm.
Adjustable switching hysteresis and r.m.s. value measurement.
Starting delay, response delay, and delay on release.
Multi-functional LC display for measured value display.
Alarm indication via LEDs and changeover contacts.
Password protection and fault memory function.
Continuous CT connection monitoring.

Intended Use
The RCMA423 is intended for use in earthed systems where DC and AC fault currents may occur, particularly in systems with rectifiers and frequency-controlled drives. It requires customized parameter settings to adapt to local conditions.

Functionality
Upon applying supply voltage, a starting delay is activated. The device displays the current measured value on an LC display. If the measured value exceeds set thresholds, alarm relays are triggered, and LEDs light up. The device includes a test button for functionality checks and allows parameterization via the display and function keys.

Connection Monitoring
CT connections are continuously monitored. In case of a fault, alarm relays switch immediately, and LEDs flash. Fault memory can be activated to retain alarm states until reset.

Technical Data

Insulation coordination: Rated insulation voltage of 100 V or 250 V depending on model.
Supply voltage: Varies by model, with ranges from AC 24-60 V/DC 24-78 V to AC/DC 100-250 V.
Measuring circuit: Compatible with CTUB101-CTBC20…210(P) transformers.
Response values: Prewarning and main alarm thresholds are adjustable.
Environmental conditions: Operating temperature from -25 to +55 °C.

Connection Details
Connections are made via screw-type or push-wire terminals, with specific guidelines for conductor types and sizes.

Standards and Certifications
The device complies with various IEC standards and is suitable for continuous operation with specific protection classes for internal components and terminals.

Ordering Information
Includes details on available models, measuring current transformers, and accessories.

Catalog excerpts

LINETRAXX® RCMA423 Residual current monitor for monitoring AC- and (pulsed) DC-currents I = 30 mA…3 A in TN- and TT systems Δ

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Device features • AC/DC sensitive residual current monitor Type B according to IEC 62020 and IEC 60755 • Two separately adjustable response ranges (prewarning, alarm) • Adjustable switching hysteresis • Starting delay, response delay and delay on release • Measured value display via multifunctional LC display • Alarm indication via LEDs (AL1, AL2) and changeover contacts (K1, K2) • N/C operation or N/O operation selectable • Password protection against unauthorized parameter changing • Fault memory function can be switched off Kr BENDER Residual current monitor for monitoring AC- and (pulsed)...

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Connect the device according the wiring diagram. Observe the manuals of the respective measuring current transformer. Connection of measuring current transformers Connection to the RCMA423 residual current monitor using the CTX-... connecting cable. Colour coding for CTX...: k = yellow, l = green, -12 V = black, GND = brown, +12 V = red, Test (T) = orange

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Insulation coordination acc. to IEC 60664-1/IEC 60664-3 Specified time RCMA42x-D-1 Rated insulation voltage 100 V Overvoltage category/pollution degree 111/3 Rated impulse voltage 2.5 kV Rated insulation voltage 250 V Overvoltage category/pollution degree MI/3 Rated impulse voltage 4 kV Response delay ton1 (prewarning) Response delay ton2 (main alarm) Delay on release toff Operating time tae at /4n = 1 x /41/2 Operating time tae at/4n = 5 x /41/2 Response time tan Recovery time tb Supply voltage range Us Operating range Us Frequency rangeUs RCMA423-D-2 Supply voltage range Us Operating range...

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Environment/EMC EMC Ambient temperatures Operating temperature Transportation Storage Classification of climatic conditions IEC 60721 (except condensation and formation of ice) Stationary use (IEC 60721-3-3) Transportation (IEC 60721-3-2) Storage (IEC 60721-3-1) Operating mode Position of normal use Protection class, internal components (IEC 60529) Protection class, terminals (IEC 60529) Enclosure material Flammability class DIN rail mounting acc. to continuous operation display oriented IP30 IP20 polycarbonate UL94V-0 IEC 60715 2 x M4 with mounting clip D330 V1.0x ≤ 150 g Screw mounting Software...

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Ordering information

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LINETRAXX® RCMA423

LINETRAXX® RCMA423

Catalog excerpts

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