Description
The GE Multilin SR469-P5-HI-A20-E-H is a sophisticated, digital motor protection relay designed for the management and protection of medium and large horsepower motors. As part of the SR469 series, this unit provides comprehensive protection, monitoring, and control functions in a single integrated package. It is specifically engineered to handle complex motor cooling curves and ambient temperature variations, ensuring that motors operate within safe thermal limits while minimizing unnecessary downtime.
Product Specifications
- Model Identification: SR469-P5-HI-A20-E-H
- Current Inputs: 5A Secondary CT (P5)
- Control Power: 90–300 VDC / 70–265 VAC (HI)
- Analog Outputs: 0–20 mA or 4–20 mA (A20)
- Display Type: Enhanced Vertical Faceplate (E)
- Harsh Environment Shield: Chemical-resistant Conformal Coating (H)
- Thermal Model: Standard with 15 standard overload curves and custom curve capability
- Dimensions: 221 mm x 182 mm x 228 mm
- Weight: 3.85 kg
- Country of Origin: Canada / USA
GE SR469-P5-HI-A20-E-H
GE SR469-P5-HI-A20-E-H
GE SR469-P5-HI-A20-E-H
GE SR469-P5-HI-A20-E-H
Application Fields
The GE SR469-P5-HI-A20-E-H is the industry standard for protecting critical motor assets in heavy industrial sectors:
- Mining & Minerals: Large conveyor drives, grinders, and crushers.
- Water & Wastewater: High-capacity pumps and aeration blowers.
- Oil & Gas: Compressors, large fans, and cooling water pumps.
- Power Generation: Boiler feed pumps, circulating water pumps, and coal pulverizers.
- Pulp & Paper: Refiner motors and large chippers.
Product Operation Instructions
- Mounting: Install the relay into a standard cutout on a switchgear or control panel door. Ensure the mounting brackets are tightened to maintain the NEMA 12/IP54 seal of the faceplate.
- Wiring Connections: Connect the Current Transformers (CTs) to the P5 inputs. Ensure the phase sequence (ABC or ACB) matches the system configuration to allow for accurate unbalance and power calculations.
- Control Power: Apply power within the “HI” range (70–265 VAC or 90–300 VDC). The relay will perform a self-test; look for the “Relay OK” LED to turn green.
- Programming: Configure the motor nameplate data (Full Load Amps, Service Factor, Locked Rotor Current) using the EnerVista SR469 Setup software or the front panel keypad.
- Harsh Environment Protection: Since this is the “H” version, it is safe for use in environments with corrosive gases. However, ensure the rear terminals are kept free from excessive moisture or conductive dust.
Q&A: Common Questions
Q: What does the “E” in the model number signify? A: The “E” stands for the Enhanced faceplate, which features a larger, more legible vacuum fluorescent display and improved navigation keys for easier field programming.
Q: Can this relay protect both synchronous and induction motors? A: Yes, the SR469 is designed primarily for three-phase induction motors, but it contains specific logic to manage the unique protection requirements of synchronous motors when configured correctly.
Q: How does the relay handle “Hot” vs “Cold” starts? A: The SR469 maintains a dynamic thermal model that tracks the motor’s heat based on current flow and RTD inputs. It automatically adjusts the trip time based on the pre-existing heat in the motor.
Similar Model Recommendations
- GE SR469-P5-HI-A20
- GE SR469-P1-HI-A20-E
- GE SR369-HI-R-M-0
- GE SR489-P5-HI-A20-E (Generator Protection version)
- GE SR745-W2-P5-G5-HI-A20-E (Transformer Protection version)
