GE MPM-HI-A20 Motor Protection Meter

Configured for motor status monitoring and current overload evaluation in GE Multilin protection networks, the Multilin MPM-HI-A20 (MPMHIA20 Protective Relay) provides direct physical/electrical execution.

Hardware Specifications

Firmware Flash Compatibility and Deterministic Bus Communication

The Multilin MPM-HI-A20 incorporates internal non-volatile firmware flash storage to preserve operational trip curves, current transformer ratios, and alarm thresholds during power loss. The real-time microprocessing unit continuously samples phase currents and voltage waveforms across screw clamp terminals, providing deterministic fault detection execution. Onboard communication interfaces maintain backplane bus velocity to transmit motor health diagnostics, thermal capacity usage, and trip event records to host SCADA and DCS platforms without signal delay.

Frequently Asked Questions

Q: What are the primary electrical power input requirements for the Multilin MPM-HI-A20 relay?

A: The device operates on a nominal supply voltage of 250 VAC at 50/60 Hz, with a maximum power burden rating of 20 VA.

Q: What termination method is used for field wiring on the MPM-HI-A20?

A: All current inputs, voltage sensing lines, and auxiliary control power connections utilize industrial screw clamp terminal blocks for secure physical wiring.

Field Installation Guidelines

Mount the protective relay securely in a panel cutout, ensuring the front gasket forms a tight seal to prevent dust ingress. Wire phase current signals through dedicated Current Transformers (CTs) and verify that the CT secondary circuits are solidly grounded at a single point prior to energization. All auxiliary power and trip control lines must use insulated copper wiring terminated tightly at the screw clamp blocks to maintain reliable contact resistance.

assive pulse rate devices, shaft voltage/current monitoring, and automatic generator synchronization. By integrating emergency trip solenoid control with precision speed sensing, this module is essential for preventing catastrophic turbine failure and minimizing unscheduled downtime in high-stakes environments like thermal power plants and petrochemical facilities.

Features

• Supports seamless integration with TRPG, TRPL, TREG, and TRPS terminal boards for signal distribution and solenoid driving.
• Utilizes four passive pulse rate inputs to monitor turbine rotation for primary overspeed trip execution.
• Includes hardware-level logic for automatic generator synchronizing and circuit breaker control.
• Features dual-threshold contact voltage sensing (20 VDC HI / 6 VDC LO) for signal reliability in industrial electrical environments.
• Dedicated hardware channels for emergency trip solenoid control.

Applications

This module is specifically engineered for use within the GE Mark VI Speedtronic control architecture. It is typically deployed in power generation facilities, thermal power plants, and large-scale petrochemical processing plants where turbine overspeed protection and precise synchronization are mission-critical requirements.

Technical Specifications

Installation Guidelines

• Ensure the Mark VI control rack is powered down before inserting or removing the VTUR board to prevent electrical damage.
• Handle the module using proper ESD (Electrostatic Discharge) protection measures to avoid damaging sensitive internal components.
• Ensure the board is fully seated in the VME-style backplane slot and that all retaining screws are tightened to ensure proper grounding and mechanical stability.
• Verify that all terminal board connections (TRPG, TRPL, TREG, TRPS) are correctly wired and secured before system startup.
• Ensure adequate ventilation within the control cabinet to maintain operating temperatures between 0 and 60 deg C.

FAQ

What is the primary function of the IS200VTURH1BAC?

The IS200VTURH1BAC acts as the primary turbine protection board in the Mark VI system, responsible for monitoring turbine speed, executing overspeed trips, and managing generator synchronization.

Is this module compatible with other terminal boards?

Yes, the VTUR board is designed to interface with specific Mark VI terminal boards, including the TRPG, TRPL, TREG, and TRPS, to facilitate signal distribution and solenoid control.