Transformer Protection Relay – TPR-804

Libratherm Instruments Pvt. Ltd.
Libratherm Instruments Pvt. Ltd.

Transformer Protection Relay – TPR-804

Product Description :

TPR-804-4 – 4 Channel Temperature Scanner cum Protection Relay with 4 relay outputs.


TPR-804-8 – 8 Channel Temperature Scanner cum Protection Relay with 4 relay outputs.

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ParametersDescription
No. of channels4 or 8
InputRTD (Pt-100) 2 or 3 wires - external temperature sensors
Display and Set Point Range-50.0 to 200.0 ?C
AccuracyBetter than ± 0.1 ?C, (Software linearized for temperature)
Display5 digits each 0.5” 7-segment Red /Green LED to indicate Actual temperature, Alarm values and 2 digits 0.3” 7-segment Red LED for channel number.
Display Scan Rate1 to 99 sec (programmable through front panel keyboard)
Skip/Hold FacilityAvailable through key board in configuration mode
High / Trip / Fan AlarmUser programmable set values.
Common Relay output4 nos. potential free (C-NO) contacts (1 each for high, trip, Fan and fault) but common for all the channels).
Optionally maximum 8 relay outputs can be provided using external relay card.
LED Indication s8 dual colour LED’s in the front indicating status of each alarm output – whether High or Trip.
Digital Interface (Optional)2 wire isolated RS485 on MODBUS RTU protocol with programmable slave ID
Supply90V - 260VAC (10VA), 50/60Hz or 24VDC @ 300mA (Any one)
EnclosurePlastic with ABS bezel and polycarbonate front.
Size / Weight96 x 96 x 160 mm. / 1.1 Kg.
Extra FeatureAny additional features – other than above – can be provided against user’s special requirement.
Sr. No.ModelDescriptionPart No.
1.1TPR -804Input: 4 nos. of RTD (Pt-100)
Output: 4 Common Relays		3400-1
1.2TPR -804Input: 4 nos. of RTD (Pt-100)
Output: 4 Common Relays
Digital Interface : RS-485		3400-2
1.3TPR -804Input: 8 nos. of RTD (Pt-100)
Output: 4 Common Relays		3400-3
1.4TPR -804Input: 8 nos. of RTD (Pt-100)
Output: 4 Common Relays
Digital Interface : RS-485		3400-4

Product Category

  • Temperature Indicators
  • Large Display Temperature Indicators
  • Portable Thermometers
  • Ramp/Soak Temperature Controllers
  • Multi Zone Ramp/Soak Controllers
  • PWHT/SR Controllers
  • PID Temperature Controllers
  • On-Off Temperature Controllers
  • Temperature Data Loggers
  • Temperature Scanners
  • Temperature and Humidity Sensors
  • Temperature and Humidity Transmitters
  • Temperature and Humidity Indicators
  • Temperature and Humidity Controllers
  • Clean Room Monitoring Systems
  • Thyristor Triggering Cards
  • Zero Cross Over Triggering Cards
  • Capacitor Bank Switch Cards (RTPFC)
  • Single Phase Thyristor Power Controllers
  • Two Phase Thyristor Power Controllers
  • Three Phase Thyristor Power Controllers
  • Single Phase Thyristor Power Switches
  • Three Phase Thyristor Power Switches
  • Three Phase SSR
  • Single Phase Thyristor DC Rectifier
  • Two Phase Thyristor DC Rectifier
  • Three Phase Thyristor DC Rectifier
  • Capacitor Bank Switches (RTPFC)
  • Signal Isolator DC to DC – AC Operated
  • Signal Isolator DC to DC – 24 VDC Operated
  • Signal Isolator AC to DC – AC Operated
  • Signal Isolator AC to DC – 24 VDC Operated
  • Signal Isolator Temp to DC – AC Operated
  • Signal Isolator Temp to DC – 24 VDC Operated
  • Signal Isolator Frequency to DC Signal
  • Signal Isolator with Display
  • Load Cell Signal Conditioners
  • Temperature Transmitters
  • Process Transmitters
  • DC Motor Controllers
  • Motor Soft Starters
  • Molten Metal Pyrometers
  • IoT Modules
  • Instrumentation Control Panels
  • Product Accessories
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