1. Overview

2. Parameters

• Overcurrent Range: 4-16 A (Typical Value)
• Power Supply Voltage: 48/125 VDC (Common DC Supply Voltage)
• Operating Frequency: 60 Hz (Standard Frequency of Power Systems)
• Characteristics: Time-Current Characteristic, with Adjustable Time Overcurrent Protection Delay Function

3. Product Features

• High Reliability: As a product of GE Company, its industrial-grade design ensures stable operation in harsh environments.
• Flexible Protection Settings: Equipped with adjustable overcurrent threshold and delay time, users can set according to specific circuit requirements to adapt to different loads and fault types.
• Strong Versatility: The relay is suitable for a variety of industrial scenarios, including motor protection, generator protection and overcurrent protection of large-scale power distribution systems.

4. Structure and Composition

• Current Detection Coil: Used to detect the current value flowing through the line.
• Rectifier and Filter Circuit: Convert the detected AC current into DC signal for analysis.
• Timing Circuit: Determine the action time according to the set time characteristics.
• Contact Group: Control the relay action, usually normally open or normally closed contacts, used to control the subsequent circuit breaker or alarm device.

5. Application Fields

• Power System Protection: Used for overcurrent protection of generators, transformers and high-voltage transmission lines.
• Industrial Automation: In large-scale mechanical equipment or industrial production lines, protect motors and key electrical equipment from overcurrent damage.
• Building Electrical: Used in the power distribution system of large-scale buildings or commercial facilities to ensure the safe operation of the power system.

6. Installation and Maintenance

Installation

• Wiring: During installation, the main current needs to be connected to the current input terminal of the relay through the detection coil (usually a clamp-on current transformer), and the power supply (48/125 VDC) should be connected at the same time.
• Setting: Adjust the overcurrent threshold and delay time according to the rated current and protection requirements of the actual circuit. Usually, it needs to be set and debugged by professional electrical engineers.

Maintenance

• Regular Inspection: It is recommended to regularly check whether the wiring terminals of the relay are loose and whether the contacts are corroded or worn.
• Function Test: Conduct regular simulated overcurrent tests to ensure that the relay can act normally when a fault occurs.
• Environment Inspection: Since the relay is usually installed in an electrical cabinet, it is necessary to ensure that the environment is dry and ventilated to prevent misoperation caused by excessive temperature or humidity.