Description

GE SR489-P5-LO-A20

The GE SR489-P5-LO-A20 is a motor protection relay from the Multilin SR Series (formerly GE Multilin). Below are its key technical parameters:

General Specifications:

• Model: SR489-P5-LO-A20
• Type: Motor Protection Relay
• Application: Designed for large motors (synchronous/asynchronous)
• Functions: Overload, short-circuit, ground fault, phase unbalance, thermal protection, etc.

Electrical Ratings:

• Supply Voltage (Auxiliary Power):
  • Standard: 85–265V AC/DC or 18–80V DC (depending on model variant)
  • A20 Suffix: Likely 120V AC/DC (confirm with datasheet)
• Current Input:
  • Phase CT Range: Typically 1A or 5A (configurable)
  • Ground CT: Optional (depends on configuration)

Protection Features:

1. Overcurrent Protection:

• • Instantaneous, Definite/Inverse Time (DTL/IDMT)

2. Thermal Overload Protection:

• • Based on I²t algorithm

3. Ground Fault Protection:

• • Sensitive ground fault detection (optional)

4. Unbalance/Undervoltage:

• • Negative sequence current (for phase unbalance)

5. Locked Rotor Protection:

• • Stalling protection with programmable delay

6. Start Protection:

• • Start inhibit & restart supervision

Control & Communication:

• Relay Outputs:
  • 4–6 programmable Form-C contacts (depends on model)
• Communication Protocols:
• Modbus RTU (RS485)
  • Optional Ethernet (SR4XX models with -E suffix)
• HMI Interface:
  • LCD display + keypad for local control

Mechanical & Environmental:

• Enclosure: Standard panel-mount
• Operating Temperature: -20°C to +60°C
• Certifications: UL, CE, IEC standards

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•Shipping Port: Xiamen

•Ship to you via Fedex/DHL/TNT/UPS/EMS

•Package: Original packing with cartons

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About Us

Xingchuang Ronghe (Fuzhou) Electrical Equipment Co., Ltd. is a professional company specializing in international trade. We have rich industry experience and extensive customer resources, and can provide personalized trade solutions for customers.

Our advantages are mainly reflected in the following aspects:

1. Product diversification: We represent a wide range of products that can meet the needs of different customers.
2. Service specialization: We have a professional team that can provide customers with comprehensive services.
3. Diversified channels: We have established long-term and stable cooperative relationships with multiple domestic and foreign enterprises, and can provide customers with various trade channels.
4. Price advantage: By optimizing the supply chain and reducing costs, we are able to provide customers with competitive prices.