The GE MPM-HI-A20 motor protection meter combines overload relay functionality with advanced monitoring capabilities in a single compact unit. This device protects three-phase AC motors against thermal overload, phase loss, and phase imbalance conditions. The GE MPM-HI-A20 also provides ground fault detection for enhanced personnel and equipment safety. Its microprocessor-based design delivers precise trip characteristics with minimal drift over time. The meter continuously monitors current, voltage, and power factor for comprehensive motor health assessment. This data allows maintenance teams to optimize motor performance and predict potential failures.
Protection Features and Electrical Specifications
The GE MPM-HI-A20 accepts current inputs up to 20 amps through integral current transformers. This unit features a wide voltage input range from 100 to 690 VAC for universal application across voltage systems. The MPM-HI-A20 includes adjustable overload trip settings from 0.4 to 1.0 times the full load current. Its thermal memory retains accumulated heat data for accurate restart protection after tripping events. The meter provides separate phase loss and phase reversal protection for comprehensive motor safeguarding. It also includes an adjustable ground fault trip level from 1 to 10 amps for sensitive protection. The device houses a built-in LCD display that shows all operating parameters and fault information. This display supports both English and metric units for international applications.
The GE MPM-HI-A20 operates on a 24 to 240 VAC/VDC auxiliary supply for universal power compatibility. It draws less than 10 VA under normal operating conditions for low energy consumption. The unit measures 3.8 inches in height, 4.5 inches in width, and 5.0 inches in depth. This motor protection meter weighs approximately 1.8 pounds, including its mounting bracket.
Outputs, Communication, and Connectivity
The GE provides two normally-open relay outputs for remote alarm and trip indication. These outputs handle up to 5 amps at 250 VAC for direct connection to contactors. The meter also offers a 4-20 mA analog output for transmitting motor current to control systems. This analog signal supports remote monitoring from a central control room. The MPM-HI-A20 includes RS-485 communication with Modbus RTU protocol for digital data retrieval. This communication supports parameter configuration and real-time data logging to a host system.
Technical Specifications Overview
| Parameter | Specification |
|---|---|
| Part Number | MPM-HI-A20 |
| Current Range | Up to 20 A (via integral CTs) |
| Voltage Range | 100-690 VAC |
| Overload Adjustment | 0.4 to 1.0 x FLC |
| Ground Fault Trip Level | 1-10 A (adjustable) |
| Phase Loss Protection | Yes |
| Phase Reversal Protection | Yes |
| Thermal Memory | Yes |
| Display | LCD (backlit) |
| Analog Output | 4-20 mA |
| Relay Outputs | 2 x NO (5A @ 250VAC) |
| Communication | RS-485 Modbus RTU |
| Auxiliary Supply | 24-240 VAC/VDC |
| Power Consumption | <10 VA |
| Dimensions (H x W x D) | 3.8 x 4.5 x 5.0 inches |
| Weight | 1.8 lbs |
| Operating Temperature | -10 to 55°C |
Application Suitability and Operational Benefits
The GE serves pumps, compressors, fans, and conveyors across manufacturing plants. Its adjustable trip settings accommodate motors of various horsepower ratings and duty cycles. The MPM-HI-A20 also supports automatic reset and manual reset modes for flexible operation. This meter’s communication capability enables remote troubleshooting and performance analysis. The GE MPM-HI-A20 provides essential motor protection in a cost-effective, easy-to-install package.
Details
| Weight | 0.30 kg |
|---|---|
| Dimensions | 110 × 70 × 30 mm |
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