Description
⚙️ Product Specifications
- Brand: GE Multilin
- Model: SMMII-PD-522-240 (Firmware: 63E492C4.000)
- Series: Motor Manager II (MM2)
- Product Name: Motor Protection and Management Relay
- Origin: USA / Canada
- Status State: Obsolete / Refurbished
- Dimensions: Standard compact enclosure format (approx. 7″ x 5″ x 4″)
- Weight: Approx. 1.5 kg
- Country of Origin: USA
- Power Rating: 240 VAC Control / Supply Power
📖 Operation Guidelines & Usage Instructions
The GE Motor Manager II (MM2) SMMII-PD-522-240 is designed to protect low and medium voltage industrial motors against thermal overloads, phase unbalance, locked rotor, and short-circuit conditions. Ensure control power and primary motor feeds are completely isolated before performing wiring or physical installation. Always short-circuit the secondary terminals of any connected current transformers (CTs) prior to disconnecting wiring to prevent dangerous high voltages. Mount the unit securely in a control cabinet away from excessive heat and vibration. Routine maintenance involves checking terminal connection torque, verifying firmware configuration settings, and testing trip output relay contacts.
⚡ Power-Up / Power-Down Sequence
- Power-Up Sequence: Verify all internal control wiring, CT connections, and trip output circuits are properly secured. Apply the 240 VAC control power supply to the relay terminals. Observe the front-panel display and status LED indicators to ensure self-tests complete successfully and the unit enters normal monitoring mode.
- Power-Down Sequence: Ensure the controlled motor is safely stopped and locked out to prevent unexpected operation. Disconnect the 240 VAC control supply voltage from the relay terminals before conducting any maintenance, configuration adjustments, or cable replacements.
❓ Frequently Asked Questions (Q&A)
- Q: What does the firmware version (e.g., F/W: 63E492C4.000) indicate?
A: The firmware version identifies the specific internal software build governing the relay’s protection algorithms, communication protocols, and user interface features. It should be referenced when performing software configurations or troubleshooting compatibility.
- Q: Can this unit operate on standard 120 VAC control power?
A: No, the SMMII-PD-522-240 model is specifically designated by its part number suffix to operate on a 240 VAC control power supply. Supplying incorrect voltage can cause internal power component failure.
🚀 Recommended GE Multilin Models
- SMMII-PD-522-120
- MM200
- MM300
- 350 Feeder Protection System
- 469 Motor Management Relay
- 239 Motor Protection Relay
- SR369
- Multilin 750
- Multilin 745
- Protect4A P4A-120
