ABB 500MTM02 1MRB150020R0712 1HDF 930512 X010 Multivariable Transmitter Module

The ABB 500MTM02 (Part Number: 1MRB150020R0712 / 1HDF 930512 X010) is a Measuring Transformer Module (or Multivariable Transmitter Module) designed for the ABB REB500 busbar protection system and high-end BIVECTOR industrial drive controllers.

It is a precision analog interface used to convert high-level currents and voltages from the substation’s primary circuit into low-level digital signals for the processing unit.

Introduction

The 500MTM02 serves as a critical bridge in the protection chain. Unlike standard binary modules, the MTM (Measuring Transformer Module) focuses on the “Measurement” (M) and “Transformation” (T) of AC signals.

It provides galvanic isolation and signal scaling, ensuring that the central processing unit receives accurate data regarding phase currents and voltages to execute differential protection logic.

Technical Parameter Table

Product Advantages and Features

High Dynamic Range: Capable of maintaining linearity even during high fault currents, ensuring the protection system doesn’t “blind” itself during a short circuit.

Zero Phase-Shift: Engineered to minimize phase displacement during signal conversion, which is vital for the accuracy of busbar differential calculations.

Precision Isolation: Protects the internal digital bus from high-voltage transients and surges originating in the switchyard.

Robust Reference (1HDF): The specific 1HDF internal reference indicates specialized components designed for high-vibration industrial drive applications.

Self-Supervision: Integrated monitoring of the secondary circuits to detect open-circuit CT conditions or blown VT fuses.

Application Cases

REB500 Busbar Protection: Providing phase current and neutral current inputs for the central differential protection algorithm.

BIVECTOR Drive Control: Measuring motor stator currents for high-performance vector control in large industrial drives.

Feeder Monitoring: Monitoring power quality and load flow in medium-voltage distribution substations.

Synchronous Motor Excitation: Measuring field and stator parameters to ensure stable motor operation under varying loads.

500MTM02 1MRB150020R0712

Installation and Maintenance

Installation

CT Safety: DANGER! Never unplug the 500MTM02 module while the primary current is flowing. Always short-circuit the external Current Transformer (CT) secondary terminals first.

Terminal Torque: Ensure the rear-side screw terminals are tightened to the specified torque. High resistance at these points can cause measurement errors or localized heating.

Slot Verification: This module must be seated in the analog input section of the subrack. Verify that the guide rails are clear of debris before insertion.

Maintenance

Secondary Injection Testing: During routine maintenance, perform a secondary injection test to verify the module’s scaling accuracy compared to the HMI readings.

Inspection for Discoloration: Check the input transformer area on the PCB for any signs of heat-induced discoloration, which could indicate a faulty CT circuit.

Configuration Backup: Before replacing a 500MTM02. document the hardware settings (jumpers) and software scaling factors in the HMI500 tool.

Related & Other Models in the Same Series

Model    Description

500TRM02    Transformer Input Module (General Purpose)

500CPU05    Central Processing Unit (Processes MTM data)

500BIM01    Binary Input Module for status signals

500PSM01    Power Supply Module

500CUM05    Central Unit Management Module

Peer Note: The part number suffix R0712 is often specific to a certain CT/VT combination (e.g., 4 Currents and 4 Voltages).

When ordering a spare, ensure this suffix matches exactly, or the internal transformer ratios may not align with your physical wiring.