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The GE 239-RTD-AN is a GE Multilin 239 series motor protection relay variant that adds RTD-based temperature monitoring for enhanced thermal protection of three-phase AC motors. It is commonly used in industrial applications where accurate monitoring of winding and bearing temperature is critical to prevent overheating and extend motor life.

Model GE 239-RTD-AN Platinum RTD Sensor

Measuring Range -200 to +600 °C

Accuracy Class Class A (IEC 60751) ±0.15°C at 0°C

Output Type 3-wire / 4-wire Configurable

Sensor Element Pt100 Standard platinum element

Response Time ≤ 1.5 seconds in water (63.2%)

Probe Material Stainless Steel 316L Corrosion-resistant

Cable Length 1.5 / 3 / 5 meters (customizable)

Power Supply Self-powered via measurement circuit

Verify that the GE 239-RTD-AN matches the required temperature range for your system.

Turn off all electrical power to the equipment before installation.

Insert the GE 239-RTD-AN probe into the designated thermowell or mounting point.

Tighten the compression fitting securely, ensuring proper thermal contact.

Connect the signal wires according to the wiring diagram (3-wire or 4-wire configuration).

Power up the system and calibrate the GE 239-RTD-AN using your control unit or temperature transmitter.

Avoid bending the probe body of the GE 239-RTD-AN during assembly.

Keep the sensor away from vibration sources or high electromagnetic fields.

Ensure that the cable glands are moisture-tight.

Do not exceed the specified temperature range or pressure limits.

Inspect the GE 239-RTD-AN periodically for corrosion or mechanical damage.

Clean the sensor surface gently using a soft cloth and alcohol solution.

Recalibrate the GE 239-RTD-AN every 6–12 months for optimal accuracy.

Check wiring connections and insulation resistance regularly.

Replace the sensor if reading drift exceeds allowable tolerance.

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