GE 239-RTD-AN Motor protective relay

The GE 239-RTD-AN Motor protection relay is a high-performance relay from GE Multilin that is designed to protect AC motors. The following is a detailed description of the relay:
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I. Product overview
Function: GE 239-RTD-AN Motor protection relays are designed to fully protect three-phase AC motors from damage due to various electrical and mechanical failures. It provides not only basic electrical protection, but also protection against common faults caused by process problems.
Application: Widely used in various industrial fields, such as pump, fan, compressor and other equipment motor protection.
Two, the main characteristics
Comprehensive protection: Provides circuit breaker fault protection, overload warning protection, ground fault protection and rotor lock protection and other protection functions.
Fault diagnosis: The fault diagnosis function provides diagnostic information after a fault occurs, helping users quickly locate the problem and restore the process.
Display and communication: Equipped with a clear LCD display, it is convenient for users to view data such as status, temperature and current. At the same time, it supports RS485 Modbus communication interface for remote monitoring and fault diagnosis.
Strong applicability: Suitable for a variety of inductive loads, and can protect any line voltage motor. The relay acts as a pilot device to disconnect the contactor or circuit breaker under fault conditions and does not carry the main motor current.
Easy installation and maintenance: Small size, suitable for most starter installations. At the same time, it supports on-site update options and/or mods, so that users can configure and upgrade according to actual needs.

3. Technical specifications
Rated voltage: 120 V AC
Operating frequency: 47-63 Hz
Power consumption: 2.6W
Operating temperature range: -40 to 200°C (equivalent to -40 to 400°F)
Trip or alarm range: 0 to 200°C or 0 to 400°F
Accuracy: ±2°C or ±4°F
Certified: UL and CSA certified for harsh environments
4. Typical applications
Mechanical protection of the pump: Use the undercurrent function to detect suction loss or drain valve closure.
Mechanical protection of fans: Use the underflow function to detect the loss of airflow in the mine or the loss of flow in the steam generation boiler.
Electrical protection of the compressor motor: use the start timer to prevent excessive running time due to the opening of the outlet.
Mechanical protection of gear, pump, fan and other equipment: the use of mechanical lock tripping function to prevent mechanical lock.
V. Summary
GE 239-RTD-AN Motor protection relay is a comprehensive and reliable motor protection device. It not only provides a variety of electrical and mechanical protection functions, but also has advanced features such as fault diagnosis, display and communication. At the same time, its strong applicability, easy installation and maintenance characteristics also make it widely used in various industrial fields.

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