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Residual-current monitoring

RCM53xB Type B Residual Current Monitor

Connect circuit-current information to monitoring and alarms

RCM53xB uses a separate current transformer for residual-current monitoring. It provides a real-time display, adjustable response values and delay, programmable relays and analog outputs. It supports equipment-circuit monitoring and alarm integration; confirm the response range and signal configuration for the actual model.

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PRODUCT INSIGHTS

Real-time display

Displays residual-current changes while a separate transformer measures the circuit.

Adjustable response and delay

Response values and operating delay can be adjusted within the limits of the corresponding model.

Multiple signal outputs

Programmable relays and analog outputs support circuit-monitoring and alarm integration.

Application concept

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Hospital TN and IT circuits
Elevator motors and conveyor systems
Electric heating and medium-frequency power systems

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Product information

TECHNICAL SPECIFICATIONS

Product specifications & functions

Monitoring type: Type B residual-current monitor supporting Type A, B and AC residual-current monitoring.
Measurement range: Residual-current measurement range: 10 mA–30 A; frequency range: 0–2,000 Hz.
Alarm and analogue outputs: Provides dual-relay alarm outputs and a 4–20 mA analogue output.
Alarm delay: Alarm delay is configurable from 0 to 10 s.
Mounting: 35.2 mm wide, 2-module mounting format.

Specifications & technical illustrationsExplore technical details · 5 technical illustrations

Technical reference · English

Electrical parameters

Type B monitors 0Hz~2000Hz AC and pulsed DC, referring to the IEC62020 standard
35.2 mm (2 standard modules), DIN rail mount
Monitored with independent residual current transformer (CT)
Monitor the effective value of residual current (minimum response value 1mA ~ maximum response value 30A/2KHz)
LED bar graph displays the percentage of residual current action value in real time
Microprocessor control and internal monitoring (self-test)
Adjustable action value ( I Δ n ): 10mA-30A
Delay adjustable ( I Δ s ): 0-10 seconds
2 buttons for local test and reset
Optional terminals for remote test and reset
Residual current transformer open circuit/short circuit detection and display, which can force relay action
DIP switch, you can choose to automatically reset or store after action
User programmable dual relay outputs (can be set to positive safety or negative safety and warning mode)
Supports two working modes: general mode and automatic reclosing mode
4-20mA analog output
The components in the device and DI and DO adopt analog components with high environmental tolerance.
EMC level meets EN55011

Communication protocols and output

Support: switch value, analog 4~20mA signal output

Technical illustration — Select image to view full size

Product selection

Matching accessories

Equipped with professional zero-sequence current transformer: please refer to the selection table for detailed parameters

Residual current monitor 3 — Select image to view full size

Product size and installation

Documentation

PDF

RCCB533 Series Type A/B Technical Reference with RCM53xB Selection Table

RCCB533 · 0.9 MB

Series reference: page 3 includes the RCM Type B ordering table. Select frequency range, measurement range and interfaces from the table for the specific model; specifications are not interchangeable across models.

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Select the model and configuration for your supply system, load and installation conditions. Use the applicable product documentation for installation and operation.