Transformer Temperature Control

TR42

Temperature Control, Sensor, Monitoring Protection Relay for MV Transformers

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 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. 100% compatible with TR-42S1 & TR-42C1

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Features

4 RTD PT100 Inputs (3 wires)
Display of the actual temperature
Display & storage of the highest temperature of each RTD
3 programmable output contacts from 0° to 220°C level 1, level 2 and FAN control
Automatic and “Always ON” fan mode
Alarm contact of TR42 failure or PT 100 disconnection
Automatic fan start every week (bearing protections)
Insulated RS485 communication port
4-20mA output corresponding to the temperature readings
100% compatible with TR-42S1 & TR-42C1
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Technical specifications

Cast Resin transformer - Orion Italia TR42 temperature control

Scale: -10 ÷ +240 °C
Accuracy: ±1% F.S. ± 1 digit
Settings: L1, L2, FAN: 0 ÷ 220 °C
Supply voltage: 85÷264Vac (115÷300Vdc) or 24Vdc (select model)
Maximum power consumption: 4VA or 4W
Inputs: 4 platinum sensors PT100 with 3 wires. 500 Ohm max wire impedance.
Outputs: FAN: normally open, Imax 16A 240Vac/24Vdc resistive load (7A continuous) /1HP 240 Vac. L1,L2: change-over 5A(n.o) res. load 250 Vac.
FAULT: 5A (n.c)
Operational Temperature: 0 ÷ 50 °C
Storage Temperature: –20 ÷ 70 °C
Relative Humidity: 90% (non-condensing)
Burn in: 48 hours
Dielectric Withstand Voltage: 2 kVac, 60s
Construction: according to the VDE, UL, CEI standards.
Terminal block: draw-out terminals for 4 mm² cables (12 AWG).
Frame: In ABS self-extinguish with frontal protection (IP54).
Assembly: to be fixed in the structure through stirrups and screws.
Dimensions: 96x96x114 mm Cutout: 91-0,5x 91-0,5 mm (±0,5 mm)
Weight: 500 grams
Communication port: Insulated RS-485, insulation 1500 Vdc. Modbus RTU
Communication protocol: MODBUS RTU, function: 03h, 04h, 05h, 06h, 10h.
100% compatible with TR-42S1 & TR-42C1

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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

Fan Control

1 Programmable Output relay for fan control
Select between 3 or 4 input channels
Programmable weekly fan start-up for bearing protection

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
TR42CMW	85÷264Vac (115÷300Vdc)	✔	✖
TR42CMB	24Vdc	✔	✖
TR42ADW	85÷264Vac (115÷300Vdc)	✔	✔
TR42ADB	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.

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