MOD-TC-2 Thermistor monitoring Relay

In stock (3 items available)
  • Weight
    0.11 kg
  • SKU
    NTR-215

MOD-TC-2 Thermistor monitoring Relay is used to monitor PTC sensors embedded within motor windings. On resistance rise above 3.3 kΩ  the alarm output will trip.

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Modern designed thermistor relay in a din rail mounted modular style housing .The units are supply voltage selectable via the connection of different terminals. On the connection of the supply voltage the two LEDs illuminate green and the output relay will energise. Should the PTC sensor embedded within the motor windings resistance rise above 3.3 KOhms due to a rise in motor temperature the output relay will de-energise and one of the LEDs will illuminate orange. Once tripped the motor temperature would have to cool sufficiently for the resistance to drop below 1.8 KOhms to allow the output relay to re-energise again. The fixed tripping and reset values are industry recognised acceptable values.

Should the input resistance short circuit or go low below 30 Ohms this will be regarded as a fault and will be indicated by one green and one red LED, the output relay will be de-energised. Likewise, should the sensor go open circuit this will be infinity resistance and therefore high which will be indicated by one green and one orange LED, the output relay will be de-energised.

  • Power Supply: 230 VAC / 110 VAC / 24 VAC / 24 VDC
  • Max power consumption: 11 VA
  • Insulation: 2.5 kV, 50 Hz impulse
  • Sensor voltage: Max 2.5 VDC (open circuit 12 VDC)
  • Trip level: 3.3 kΩ 
  • Reset level: 1.8 kΩ 
  • Min cold sensor: 30 Ω 
  • Output contacts: DPCO 8Amps/250V AC1, DPCO 8Amps/250VAC1
  • Operating temperature: -20 to 40 °C

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