Description
🔹 Product Overview
The GE MPM-HI-A20 is a GE Multilin MPM Motor Protection Meter designed for motor protection, electrical metering, monitoring, and control applications.
The MPM combines motor electrical measurements with protection functions in a compact panel- or chassis-mounted device. The HI version accepts a wide control-power range of 90–300 VDC or 70–265 VAC, while the A20 option provides four isolated 4–20 mA analog outputs.
It is associated with GE Multilin motor protection systems and can be used in industrial motor applications where current, voltage, power, and motor operating conditions need to be monitored and protected.
🔹 Key Features
⚙️ Motor Protection – Provides protection and monitoring functions for industrial motor applications.
📊 Electrical Metering – Measures motor electrical parameters including current, voltage, real power, reactive power, and power factor.
🔌 Wide Control Power – HI version supports 90–300 VDC or 70–265 VAC, 50/60 Hz.
📈 Four Analog Outputs – A20 version provides four isolated 4–20 mA outputs for transmitting measured values to external control or monitoring equipment.
🔄 CT Inputs – Supports isolated three-phase CT inputs with 1 A or 5 A secondary connections.
📡 RS-485 Communication – Includes an isolated RS-485 communication port for data exchange with associated equipment.
🛡️ Compact Design – Combines multiple motor protection and metering functions in one unit instead of requiring separate discrete components.
🔹 Technical Information
📌 Manufacturer: General Electric / GE Multilin
📌 Model: MPM-HI-A20
📌 Product Type: Motor Protection Meter
📌 Product Family: MPM
📌 Control Power: 90–300 VDC
📌 AC Control Power: 70–265 VAC, 50/60 Hz
📌 Control Power Rating: 20 VA
📌 CT Inputs: 3 isolated phase CT inputs
📌 CT Secondary: 1 A or 5 A
📌 Voltage Inputs: 0–600 V
📌 Voltage Connection: 3-wire or 4-wire
📌 Analog Outputs: 4 isolated outputs
📌 Analog Output Range: 4–20 mA
📌 Communication: Isolated RS-485
📌 Output Relay: Form-C failsafe relay
📌 Maximum Relay Contact Rating: 250 VAC, 10 A resistive
📌 Mounting: Panel or chassis mount
The MPM-HI-A20 designation combines the MPM base model, HI control-power option, and A20 four-channel 4–20 mA analog-output option.
🔹 What Does “HI-A20” Mean?
The suffix is important when identifying this unit.
HI = High-range control power option:
• 90–300 VDC
• 70–265 VAC, 50/60 Hz
• 20 VA
A20 = Four isolated 4–20 mA analog outputs.
The four analog outputs are assigned to average current, real power, reactive power, and power factor.
So MPM-HI-A20 is not simply a “90–300VDC 8A” power module. It is a complete motor protection and metering device with a high-range control-power option and four 4–20 mA outputs.
🔹 Protection & Monitoring Functions
The MPM platform is intended to consolidate several motor-monitoring functions.
Typical measured parameters include:
• Phase current
• Phase voltage
• Real power
• Reactive power
• Power factor
• Motor operating conditions
The unit also accepts RTD and switch inputs depending on the configured MPM system/application, allowing motor thermal and operating-condition information to be incorporated into the protection scheme.
🔹 Analog Output Configuration
For the A20 version, four isolated 4–20 mA outputs are available.
The factory documentation assigns these outputs to:
- Average current
- Real power
- Reactive power
- Power factor
These outputs can be connected to a PLC, DCS, recorder, panel meter, or other compatible analog-input system for remote indication.
🔹 Typical Applications
The GE Multilin MPM can be applied in motor-driven industrial equipment such as:
🏭 Industrial production machinery
💧 Pumps and water-treatment equipment
🌬️ Fans and blowers
⚙️ Conveyors and material-handling systems
🔩 Compressors
🏗️ Process equipment
⚡ Motor control and protection panels
The compact MPM design is particularly useful where protection, metering, analog retransmission, and communications need to be integrated into one motor-management device.
🔹 Installation & Replacement Notes
Before replacing an existing MPM unit, isolate the motor-control equipment and verify that all stored electrical energy has been discharged.
- Confirm the complete model number: MPM-HI-A20.
- Check the control-power source against the HI specification.
- Verify the CT secondary rating: 1 A or 5 A.
- Confirm the voltage-input configuration and wiring.
- Record the existing analog-output assignments.
- Photograph terminal wiring before removing the original unit.
- Check RS-485 wiring and communication settings.
- Verify relay wiring and configured protection functions.
- After installation, perform a controlled startup and confirm measured current, voltage, power, analog outputs, communication, and protection indications.
⚠️ Important: Do not select a replacement based only on the MPM family name. The HI/A20 options affect the control-power and analog-output configuration. Confirm the complete suffix before installation.
🔹 Identification Guide
When inspecting an existing unit, check the following markings:
• GE / General Electric
• GE Multilin
• MPM
• MPM-HI-A20
• Control voltage information
• A20 / 4–20 mA output designation
• Serial number and revision information
The complete model designation is important because MPM units are available with different control-power and analog-output options.
🔹 FAQ
Q: What is GE MPM-HI-A20?
A: It is a GE Multilin MPM Motor Protection Meter used for motor protection, metering, monitoring, and control.
Q: What is the control voltage?
A: The HI version accepts 90–300 VDC or 70–265 VAC at 50/60 Hz.
Q: What does A20 mean?
A: A20 identifies the four isolated 4–20 mA analog-output option.
Q: Does the unit have CT inputs?
A: Yes. The MPM uses three isolated phase CT inputs and supports 1 A or 5 A CT secondaries.
Q: Is MPM-HI-A20 a PLC module?
A: No. It is a dedicated motor protection and metering device rather than a general-purpose PLC I/O module.
Q: Does it support communication?
A: The MPM specification includes an isolated RS-485 communication port.
Q: Is 8A the control-power rating?
A: No. The official MPM specification identifies the control-power rating as 20 VA. The 8 A figure should not be used as the DC control-power rating without confirming what it refers to on the specific equipment or listing.
🔹 Related GE Multilin Models
- GE Multilin MPM-HI-A1 – MPM Motor Protection Meter, 0–1 mA analog-output option
- GE Multilin MPM-LO-A20 – MPM Motor Protection Meter, low-voltage control-power / 4–20 mA option
- GE Multilin 269+ – Motor Management Relay
- GE Multilin 269PLUS – Motor Management Relay
- GE Multilin 369 – Motor Management Relay
- GE Multilin 369-HI-R-M-0-0 – Motor Management Relay
- GE Multilin 339 – Motor Protection Relay
- GE Multilin 469 – Motor Management Relay
- GE Multilin 889 – Motor Protection System
- GE Multilin 869 – Motor Protection Relay
🔹 Product Summary
The GE MPM-HI-A20 is a Multilin Motor Protection Meter combining motor protection, electrical metering, monitoring, communication, and analog signal retransmission in one device.
Its HI power option supports 90–300 VDC / 70–265 VAC, while the A20 configuration provides four isolated 4–20 mA analog outputs. For replacement work, always match the complete MPM option code, CT configuration, wiring, and existing protection settings rather than selecting by voltage alone.
