Product Details:

Voltage24 to 260V AC-DC
Temperature Rangeminus 40 to plus 240 deg C
Controller TypeSafety Limit Controller, On/Off Control
Input SensorRTD
Power24 VDC, 100 to 240 VAC
Model NumberTR-100
MaterialFlame retardant plastic
TypeDigital with RS485 Modbus RTU/ASCII communication
MountingStandard DIN rail
Size139 x 90 x 63 mm
Display TypeDigital LED
ApplicationProtection of Dry type Transformers and HV Motors


TR-100 is used to measure and control device temperature via four RTD sensors connected in a two or three-wire circuit, with subsequent indication of the temperature on the display and alarm signaling in case of any parameters being outside the set range.

It can be used to protect:

  • Engines and generators
  • Three phase dry transformers with additional core or ambient temperature control

TR-100 can use any voltage between 24 and 225V AC, regardless of the polarity.

The following thermal sensors can be used by TR-100:

  • PT100 – platinum sensor with nominal resistance of 100 Ohm at 0
  • PT1000 – platinum sensor with nominal resistance of 1000 Ohm at 0
  • KTY83 – silicon sensor with nominal resistance of 1000 Ohm at 25
  • KTY84 – silicon sensor with nominal resistance of 1000 Ohm at 100
  • PTC (1, 3, 6 serial connection), cold resistance of 20-250 Ohm

Temperature Range: -40 to +240 deg C

Display Size: LED 3 x 7 Segment

Controller Type: On/Off Control

Input Sensor: RTD

Additional Information:

  • Item Code: TR-100
  • Port of Dispatch: New Delhi, India


Supply power, V24 – 260 AC/DC
Recommended fuse for equipment protection, А1-2
Thermal transducersPT100, PT1000, KTY83, KTY84, PTC
Connectable transducers, pcs.1 – 4*
Method of hardwire2 / 3 wired
Wire length of sensor ( depending on method of hardwire), m:

2 wired up to 5

3 wired up to100

Amount of output relay, pcs.4
Date-hold time, years, not less then15
Temperature measurement error, °С± 3
Temperature measurement range, °Сfrom – 40 to +240
Output relay testYes
Indication testYes
RS-485 MODBUS RTUTo order
Time measurement, sec.£ 2

Degree of protection:                                      – body

– terminal block



Climatic executionY3.1
Power input (power load), VA, no more than4,0
Weight, kg, no more then0,180
Dimensions, mm90 х 139 х 63
Operation temperature range, °Сfrom -40 to +55
Storage temperature, °Сfrom -50 to +60
Montage to standard 35mm mounting frame
Free position in space
* note – PTC transducers can be connected as serial connection (1, 3, 6 pc.)

Characteristic of output contacts:

Cos ф

Max. Current (U~250В)Max. PowerMax. Voltage.~Max. Current (UDC =30В)
1,010 А4000 VA440 В

3 А

Commutation life of the output contacts:

– under 10A 250V AC, times, not less than

– under 10А 24V DC, times, not less than

10 mil.

10 mil.