GE 489-P1-LO-A1-T 489 series motor management relay

Control Power Supply: Supports 20-60VDC or 20-48VAC (48-62Hz), optimized for low-voltage systems. No additional step-down modules are required, making it suitable for scenarios such as DC UPS and photovoltaic inverters.

Comparative Advantages: Compared with wide-voltage models (e.g., suffix "HI"), it has lower power consumption (typical value ≤12W) and stronger stability in low-voltage environments.

Current Input: 3-phase CT input (1A secondary) + neutral CT, supporting high-precision current measurement (±0.2% accuracy).

Analog Output: 1-channel 4-20mA output (A1 code), transmitting key parameters (e.g., current, temperature) to PLC or DCS systems.

Digital Interfaces: 5 programmable digital inputs (compatible with dry/wet contacts) + 4 relay outputs (rated 5A@250VAC), supporting flexible logic control.

Overload Protection: 8 standard inverse-time curves + custom FlexCurve, supporting thermal memory (simulating motor cooling characteristics).

Short-Circuit Protection: Instantaneous (5-10x rated current) and inverse-time dual modes, with a minimum response time of 10ms.

Phase Loss/Unbalance Protection: Negative sequence current detection, with adjustable unbalance threshold (default 10%-15%).

Ground Fault Protection: Zero-sequence current monitoring, with a sensitivity of 0.1A, suitable for IT or TN-S systems.

Locked Rotor Protection: Monitors starting time (default 30s) and trips quickly when current continuously exceeds the threshold.

Voltage Anomaly Protection: Undervoltage (e.g., <80% Un)/overvoltage (e.g., >120% Un) protection with delay settings.

Phase Sequence Protection: Prevents motor reversal caused by incorrect power wiring, suitable for pumps, compressors, etc.

RTD Interface: Supports up to 12 PT100 temperature sensors for direct monitoring of winding/bearing temperatures.

Dual Verification: Cross-verification between I²t model and RTD measured values to avoid misjudgment (e.g., temperature rise due to ventilation failure).

Electrical Parameters: Real-time monitoring of three-phase current, voltage, power, power factor, frequency, cumulative energy, etc.

Temperature Monitoring: RTD channels support open/short circuit detection, with temperature display accuracy of ±0.5°C.

Display Interface: Basic LCD (40 characters × 2 lines) + 7 LED indicators, enabling local parameter viewing and configuration.

Standard RS485: Modbus RTU protocol, up to 115.2kbps, supporting multi-device networking.

Optional Upgrades: Ethernet interface (Modbus TCP/IP) or DeviceNet, adapted to industrial Ethernet environments.

Remote Monitoring: Enables remote parameter configuration and fault diagnosis via SCADA systems or cloud platforms.

Relay Outputs: 4 relays with customizable functions (e.g., main trip, alarm, spare), supporting logical combinations (AND/OR).

Digital Inputs: 5 inputs configurable as speed feedback, external fault signals, etc., enhancing system integration.

Operating Temperature: -25°C to +60°C; storage temperature: -40°C to +85°C, suitable for harsh industrial environments.

Anti-Interference: Complies with IEC 61000-6-2 industrial immunity standards, with excellent EMC performance (e.g., resistant to VFD interference).

Mechanical Features: DIN rail mounting, protection class IP54 (front panel)/IP20 (rear), vibration resistance ≤1g (IEC 60068-2-6).

Protection for motors driven by photovoltaic water pumps and communication base station backup power, adapted to DC outputs of inverters.

Overload/short-circuit protection for conveyor motors, fans, and pumps, enabling remote control via Modbus integration with PLC.

Real-time monitoring of winding temperatures for high-voltage motors and precision machine tool spindle motors, preventing failures due to poor heat dissipation.

Motor protection for wind turbine pitch systems and energy storage PCS (power conversion systems), adapted to low-voltage DC environments.