239-RTD-AN

Product Overview

• Manufacturer: General Electric
• Product Type: Motor protection relay of the 239 series, designed for the comprehensive protection of three-phase AC motors and monitoring of conditions that may lead to application downtime and damage258.

Technical Parameters

• RTDs: 3 programmable RTDs, supporting PT, NI, CU thermistors2.
• Analog Output: Single isolated analog output with milliamperes in the range of 0-1 mA, 0-20 mA, and 4-20 mA5.
• Power Supply: 90 – 300 VDC / 70 – 265 VAC.
• Insulation Voltage: 300 V5.
• Fuse Rating: 5 x 20 mm, 250 V, 2.5 A5.
• Overload Curves Trip Time Accuracy: Pickup ±1% of displayed value5.
• Unbalance Delay: 0-60 s5.
• Storage Temperature Range: -40 to 158 °F5.
• 

Features

• Comprehensive Protection Functions: It provides breaker failure protection, overload warning protection, ground fault protection, and locked rotor protection5.
• Programmable Function: The 3 RTDs and analog output are programmable258.
• Good Display and Operation: It is equipped with a 40-character LCD display to view status messages, fault conditions, and setpoints/values. There are also six LED status indicators and a dust-tight, splash-proof keypad5.
• Certified: UL and CSA approved5.
• 

Application Areas

• Power Generation Industry: It is used to protect and monitor motors in power plants, such as the motors in boiler feedwater systems and cooling systems.
• Petrochemical Industry: Motors in oil extraction, refining, and chemical production processes can be protected by 239 – RTD – AN. For example, the motors of oil pumps and chemical reaction agitators.
• Metallurgical Industry: In metallurgical plants, it can protect motors in steel rolling mills, blast furnaces, and other equipment.