GE MMII-PD-12-120 Motor Management Relay

Product Description

GE MMII-PD-12-120 is a protective relay (motor management relay) from the Multilin MMII series, an intelligent relay device for comprehensive protection and monitoring of low-voltage motors. This model provides complete motor protection functions including overload, locked rotor, phase loss, current unbalance and ground fault protection. It integrates current and voltage measurement to monitor motor operating conditions, supporting local indication and remote communication. With programmable logic and 120V control power supply, it can realize trip and alarm outputs. Widely used for low-voltage motors, pumps and fan motor protection, it is a classic spare part of Multilin MMII series.

Specifications

• Model: MMII-PD-12-120
• Type: Multilin MMII Motor Management Relay
• Control Power Supply: 120V AC
• Protection Functions: Motor overload, locked rotor, phase loss, current unbalance, ground fault protection
• Measured Values: 3-phase current, ground current
• Indication: Local status LED indicators, fault event recording
• Output Contacts: Programmable relay outputs for trip and alarm
• Communication: Optional Modbus interface for connection to DCS/SCADA host system
• Mounting: Panel mount
• Operating Temperature: -40℃ ~ +70℃
• Certifications: UL, CSA, CE
• Front Panel Rating: IP40
• Cooling: Natural air cooling

Application

• Power Plant Auxiliaries: Low-voltage motor protection for boiler feed pumps, induced draft fans and forced draft fans
• Petrochemical Industry: Motor protection for process pumps, compressors and transfer motors
• Water Treatment: Motor protection for sewage pumps, dosing pumps and aeration blowers
• Manufacturing: Motor protection for assembly lines, air compressors and cooling fans
• Oil & Gas: Protection for compressor and transfer pump motors
• Retrofit Projects: Replacement of legacy MMII relays and low-voltage motor protection circuit upgrade

Multilin MMII Series Models

1. MMII-PD-12-120: MMII motor management relay, 120VAC control supply
2. MMII-PD-12-240: MMII motor management relay, 240VAC control supply
3. MMII-PD-12-24: MMII motor management relay, 24VDC control supply
4. MMII-PD-LR: MMII version with long start protection
5. MMII-PD-12-DC: DC powered MMII motor protection unit