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Overview of 239-RTD-AN protective relay
239-RTD-AN protection relay is a motor protection relay produced by General Electric Multilin. It is mainly used to protect three-phase AC motors and provide comprehensive protection for the motor under certain harsh conditions.
Characteristics of 239-RTD-AN protective relay
239-RTD-AN Programmable functions
RTD type programmable
Programmable RTD types are available in nickel, platinum or copper.
Programmable output parameters
With programmable output parameters, its mA analog output has three options: 0-1mA, 0-20mA and 4-20mA.
Parameters such as the phase current temperature of RTD1, RTD2 and RTD3 can be adjusted, the heat capacity can be changed, and the percentage of full load can be changed.
239-RTD-AN Multiple protection functions
239-RTD-AN Common fault protection
Provides multiple protection functions such as circuit breaker fault protection, overload warning protection, ground fault protection and rotor lock protection.
It also prevents faults such as undercurrent and short circuits, and can detect mechanical faults such as closed discharge valves or loss of suction, for example.
239-RTD-AN Startup protection related
There is a start-up protection function and can be disabled on the relay when start-up protection is not required. If the setpoint on the relay is set to "Yes", the model will go directly to the overload curve and the operating conditions will be applied to protect the connected load model. This specific setpoint can also be used with switch inputs, if you want the start protection to fail when the connected switch input is closed, disable start must be set to yes.
239-RTD-AN Mechanical jam protection
The mechanical blocking function is mainly used to protect connected equipment such as gearboxes, saws, compressors and pumps, etc. It is usually recommended to trip immediately in the event of rotor locking during equipment operation.
239-RTD-AN Display and indication functions
239-RTD-AN Display
The front panel includes a 40-character LCD display for viewing status messages, fault conditions and setpoints.
239-RTD-AN status light
The device has six LED status indicators to visually display relevant status.
keyboard
The panel also includes a dust- and splash-proof keypad, and a protective door can be used to cover the keys when they are not in use.
Analog output of 239-RTD-AN protective relay
239-RTD-AN Output type
Features an optional single programmable analog output and is a single isolated analog output.
239-RTD-AN Output range
It can work in three different mA ranges of 4-20, 0-1 or 0-20. Users can select the analog output range according to their needs.
239-RTD-AN-H model (extended model of 239-RTD-AN)
Harsh environment coating
239-RTD-AN-H is an extension of model 239-RTD-AN, adding a harsh environment coating with H ordering code.
Related software
Has 239PCWindows software.
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