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
- QR code to access product information and videos
Technical specifications
- 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
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 | ✔ | ✔ |
