Transformer Temperature Monitor with 4-20mA output


Temperature Control with 4-20mA & modbus – TR42AD

TR42AD

Temperature Control, Sensor, Monitoring Protection Relay for MV Transformers

4-20mA & RS485 Modbus Communication

The TR42 is a temperature monitoring, control and sensor relay (transformer protection 49 relay) for 3 phases cast resin / dry type transformers of any voltage (kV) and power level (kva), Its main functions are to execute actions in real time according to the temperature sensors of the transformer windings and the customized programming, such as on / off the cooling fan, alarm or trip. Communication port RS485 & 4-20mA output included.


Our transformer protection relay (49 relay) as a temperature monitoring of dry type or cast resin transformer, with 4 PT100 sensor and fan control help on hot days or overcurrent scenarios to achieve more kva, avoiding over temperature. 3 phase, electrical transformers on > 10 kV applications, indoor or outdoor. A great alternative to ptc sensor solutions.



Features

  • 4 RTD PT100 Inputs (3 wires)
  • Real-time temperature display for each sensor
  • Display and storage of the peak temperature reached by each RTD
  • 4 independent programmable output contacts configurable from 0°C to 220°C for Level 1 alarm, Level 2 alarm, FAN1, and FAN2 control (new)
  • Automatic fan mode and “Always ON” option for continuous ventilation
  • Alarm relay for TR42 internal failure or PT100 sensor disconnection
  • Weekly automatic fan start to protect fan bearings from seizing
  • Isolated RS485 Modbus communication port for integration into SCADA and remote systems
  • 4–20 mA analog output corresponding to temperature readings
  • 100% backward compatible with previous models
  • QR code access to product documentation and tutorial videos

Communication

Communication capabilities are available in the TR42 connecting the RS485 port in a network controlled by a supervisor device (PC). The protocol used is Modbus RTU. The connections have to be made with shielded twisted wires.


Perfect for remote cloud supervision.

Functions & Signals

  • 3 Digits Display for temperature reading
  • 1 Digit Display for the channel identification.
  • Fault Led for immediate status reading
  • Output relays status leds
  • Display test function
  • Password protected menu
  • Autoscan of each input channel


PT100 Inputs

  • 4 Programmable PT100 inputs
  • Select between 1 or 4 input channels
  • 3 Wires cables PT100 sensor
  • Range -10 to 240°C
  • Short circuit or open circuit detection
  • Dedicated led for input status


2 x Fan Control

  • (2) Dual Programmable Output Relays: Designed for independent or synchronized control of two fans.
  • Selectable Input Logic: Easily configure the system for 3 or 4 input channels.
  • Integrated Bearing Protection: Programmable weekly start-up cycles to prevent bearing seizure and extend motor

4-20mA Output

Programmable 4-20mA output:


  • 1 Selected RTD
  • Scan of all RTD's
  • Only the highest of all RTD1
  • Selectable output load
  • Factory calibrated with field calibration feature
  • Digital to analog precise circuitry
  • Compatible with most PLC's on the market


Retrofit

100% compatible with older models TR-42S1 & TR-42C1


  • Same 4 inputs RTD & same cabling numbers
  • Same output contacts & cabling
  • Now with communication port in all models for future proof projects
  • Improved menu and security


How to Order

Order Code Power Supply RS-485 4-20mA FAN1/FAN2 Contacts Ethernet
TR42CMW5 85÷264Vac (110÷300Vdc) ✔ ✖ ✔
TR42CMB5 24Vdc ✔ ✖ ✔
TR42ADW5 85÷264Vac (110÷300Vdc) ✔ ✔ ✔
TR42ADB5 24Vdc ✔ ✔ ✔
TR42EW5 85÷264Vac (110÷300Vdc) ✔ ✔
TR42EB5 24Vdc ✔ ✔

Applications

Temperature Sensor Relay

The TR42 is a temperature sensor relay for dry type (cast resin) transformer and any power level (kva) or voltage (kV) ,  this temperature relay supports 4 PT-100 sensors with 3 wires. For indoor or outdoor applications please refer to our technicians.  Our product is not compatible with PTC sensors.   This Temperature sensor relay is optimized for ansi 49 (over temperature) in consequence of overcurrent.  Fan control is also available on all models.

Temperature Monitoring Relay

The temperature monitoring relay TR42 has the ability to remotely share the temperature monitoring records of each transformer winding via communication port.  Very important on ansi 49 (over temperature) and overcurrent situations.  PT-100 sensors and Fan status are also being remotely monitored specially on outdoor or indoor installations.  Dry type (cast resin) on any power level (kva) or voltage (kV) 

Temperature Control Relay

Our temperature control relay TR42 has been designed to meet the requirements of a transformer protection relay in addition to control functions such as fan management to lower temperature due to overcurrents.   Breaker trip is another function included to avoid dangerous over temperature that helps the transformer fire protection system

49 Protection Relay

The ANSI function 49 protection relay It is commonly used to name this type of temperature protection device for relays that prevent (indirectly) overcurrents, overheating or even fire protection by controlling and monitoring the transformers windings temperature in cast resin (dry type) models.

Transformer Temperature Protection Relay

There is a wide range of Transformer Temperature Protection Relay according to the type of transformers and its power, also different protection methods, our TR42 Relay is for Air Transformers (dry type, cast resin), the temperature protection (ansi 49) is based on monitoring by PT-100 sensors in the Transformer's windings, the relay controls these parameters and performs fan control, alarm or trip actions as programmed.

PT-100 to 4-20mA Converter

Translates the resistance of a PT100 temperature sensor into a standard 4-20mA industrial signal.

Features a clear display for real-time temperature monitoring.

Offers easy configuration and reliable performance for various industrial applications.

Accessories and solutions

PT100 sensor
PT BOX
Temperature Metering & Control Panel Board

Request Form TR42

Request 1

Request 2

If final destination of products is different from the written address, please include the complete address information on the message.