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Precision Instruments for Transformer Temperature Monitoring

ELECTRONICS

Microprocessor-based instruments supporting RTD and thermocouple sensors for precise temperature measurement. They provide separate 4–20 mA DC outputs for OTI and WTI, enable SCADA connectivity, and record the highest temperature.

TC23 (Digtal)

TC23 (Digtal)

  • Temperature sensor - RTD (PT-100 DIN 43760)
  • Operating temperature - 20°C to 60°C
  • CT secondary current input - 1A – 5A (User Selectable)
  • No. of sensor input - One
  • Accuracy - ±1% of FSD
  • No. of Set-points OTI - Two independent output relays (Alarm & Trip)
  • No. of Set-points WTI - Four independent output relays (Alarm, Trip, Fan 1 & Fan 2)
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TC22 (AVR)

TC22 (AVR)

  • Auxiliary Supply - 90 to 260V AC/DC, 10VA
  • PT Supply - 110V AC, 50Hz, 1.5VA
  • Nominal voltage - 85 to 140V
  • Lower set - 95 to 125V
  • Raise set - 90 to 120V
  • Time Delay - 0 to 120 sec
  • UV blocking - Internal blocking at 80V and restoring at 85V
  • Control Relays - 1 pair of NO potential free contacts of 5A at 240V AC/ 24VDC for LR, RR each
  • Operating temperature - 0 - 50°C
  • Overall Dimension - 96 x 192 x 80 mm (H x W x D)
  • TPI Input - 1KE step resistance for a max of 17 steps
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TC52 (CCU)

TC52 (CCU)

  • Signal Input - PT 100RTD, Simplex 3 wire
  • Auxiliary supply - 90 – 240V AC/DC
  • Signal Output - 2 Nos of 4 – 20mA DC corresponding to temperature range (optional RS485 communication Modbus)
  • Burden on Output Signal - 600 ohms maximum including loop resistance
  • Accuracy of signal output - ±1% of FSD
  • Degree of protection - IP-40 for enclosure & IP-10 for terminals
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TC53 (Remote indicator)

TC53 (Remote indicator)

  • Power Supply - 100 to 270V AC, 50Hz
  • Input - 4 To 20mA DC
  • Accuracy - ±1% of FSD
  • Burden - 2VA
  • Warm up time - 5 Minutes
  • Mounting type - Panel Mount
  • Dimension - 96 x 96
  • Cutout - 92 x 92
  • Display - 4 Digit 7 seg 0.56” Red LED Display
  • Working temperature - 0 to 55°C
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