Temperature-Relay Type TR250
  • Temperature-Relay Type TR250

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Manufacturer: ZIEHL

Temperature-Relay Type TR250

The Pt100 thermostat TR250 monitors up to 3 sensors Pt100 (RTD), Pt1000, KTY83 KTY84 or thermistors (PTC) at the same time. Different types of sensors, e.g. Pt 100 and PTC can be monitored simultaneously. The unit is especially suitable for monitoring motors, generators and transformers.

An other application is the use as a 2- or 3-step-controller with additional monitoring of over- or under-temperature. monitoring of differences in temperatures of 2 sensors or temperature controller for heat pumps.

Function

  • Measuring an dmonitoring range -199...+850 °C
  • Resolution 0.1 °C for measuring range –19.9...99.9 selectable
  • 3 relay-outputs K1 to K3 with change-over-contacts
  • Universal power-supply AC/DC 24-240 V
  • Easy setting
  • Storing of values of MIN- and MAX temperature
  • Alarm counter for 3x99 alarms with display of sensor and elapsed time
  • Code-lock against manipulation of settings

3 Sensor inputs:

  • Pt 100 (RTD) or Pt 1000, 2- or 3-wire-connection, KTY83, KTY84
  • Thermistors (PTC) each 1...6 in series
  • Monitoring of short-circuit and break

Displays:

  • 3 digit 7 segment display for temperature and programming
  • 3 LEDs for sensors, for alarms/relays
  • display °C or °F selectable, resolution 0.1 °C

Switching functions:

  • 3 relays
  • warmest/coldest sensor switches relay
  • 3 LEDs for alarm/relay
  • programmable for every relay:
    • hysteresis
    • autoreset or electronic reclosing lock
    • delay time for switching and switching back
    • operating- or closed current-mode
    • cyclic check of function
  • monitoring of difference in temperature

6 preset programs:

  • Motor /generator 3x Pt 100
  • transformer with 3x Pt 100
  • transformer with 2x PTC and 1x Pt 100
  • transformer with 2x PTC / 3x PTC
  • 3 x 1 alarm per sensor

Technical Data

Rated supply voltage UsAC/DC 24 – 240 V
ToleranceDC 20, 4 - 297 V ..... AC 20 - 264 V 50/60 Hz
Power consumption< 3 W ..... < 7 VA
Output3 x co (change-over)
Switching voltagemax. AC 415 V
Switching currentmax. 5 A
Switching powermax. 1250 VA (resistive load)
max. 120 W at DC 24 V
UL electrical ratings250 V ac, 5 A, resistive
E214025240 V ac, 1/2 hp
120 V ac, ¼ hp
B 300 – pilot duty, UL 508
Rated operational current Ie 
AC15Ie = 3 A ..... Ue = 250 V
DC13Ie = 2 A ..... Ue = 24 V
Ie = 0,2 A ..... Ue = 125 V
Ie = 0,1 A ..... Ue = 250 V
Recommended fuse for contactsT 3,15 A (gL)
Expected contact life mechanical3 x 107 operations
Expected contact life electrical1 x 105 operations with AC 250 V / 6 A
Rated impulse voltage4000 V
Overvoltage categoryIII
Contamination level2
Rated insulation voltage Ui300 V
On-time100 %
emitted interferenceEN 61000-6-3
BurstEN 61000-4-4 +/-4 kV
Pulse 5/50 ns, f = 5 kHz, t = 15 ms, T = 300 ms
SURGEIEC 61000-4-5 +/-4 kV
Impulse 1,2/50 μs (8/20 μs)
discharge of static electricityIEC 61000-4-2 +/-4 kV contact, +/- 8kV air
Ambient temperature range-20 °C ... +65 °C
Storage temperature range-20 °C … +70 °C
AltitudeUp to 2000 m
Climatic conditions5 – 85 % rel. humidity, no condensation
External wiring temperature range-5 °C … +70 °C
Vibration resistance EN 60068-2-62…25 Hz ±1,6 mm
25 ... 150 Hz 5 g
Accuracy±0,5 % of value ±1 K (KTY ±5 K)
Sensor-current≤ 1 mA
Measuring time tM 
Mounting height55 mm
Width4 TE
Dimensions (W x H x D)70 x 90 x 58 mm
Line connection solid wireeach 1 x 1,5 mm2
Stranded wire with insulated ferruleseach 1 x 1,0 mm2
Torque0.5 Nm (3,6 lb.in)
Protection class housingIP 30
Protection class terminalsIP 20
Fitting positionany
MountingSnap mounting on 35 mm standard rail EN 60 715 or M4 screws
Weightapp. 200g

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The Pt100 thermostat TR250 monitors up to 3 sensors Pt100 (RTD), Pt1000, KTY83 KTY84 or thermistors (PTC) at the same time. Different types of sensors, e.g. Pt 100 and PTC can be monitored simultaneously. The unit is especially suitable for monitoring motors, generators and transformers.

An other application is the use as a 2- or 3-step-controller with additional monitoring of over- or under-temperature. monitoring of differences in temperatures of 2 sensors or temperature controller for heat pumps.

Function

  • Measuring an dmonitoring range -199...+850 °C
  • Resolution 0.1 °C for measuring range –19.9...99.9 selectable
  • 3 relay-outputs K1 to K3 with change-over-contacts
  • Universal power-supply AC/DC 24-240 V
  • Easy setting
  • Storing of values of MIN- and MAX temperature
  • Alarm counter for 3x99 alarms with display of sensor and elapsed time
  • Code-lock against manipulation of settings

3 Sensor inputs:

  • Pt 100 (RTD) or Pt 1000, 2- or 3-wire-connection, KTY83, KTY84
  • Thermistors (PTC) each 1...6 in series
  • Monitoring of short-circuit and break

Displays:

  • 3 digit 7 segment display for temperature and programming
  • 3 LEDs for sensors, for alarms/relays
  • display °C or °F selectable, resolution 0.1 °C

Switching functions:

  • 3 relays
  • warmest/coldest sensor switches relay
  • 3 LEDs for alarm/relay
  • programmable for every relay:
    • hysteresis
    • autoreset or electronic reclosing lock
    • delay time for switching and switching back
    • operating- or closed current-mode
    • cyclic check of function
  • monitoring of difference in temperature

6 preset programs:

  • Motor /generator 3x Pt 100
  • transformer with 3x Pt 100
  • transformer with 2x PTC and 1x Pt 100
  • transformer with 2x PTC / 3x PTC
  • 3 x 1 alarm per sensor

Technical Data

Rated supply voltage UsAC/DC 24 – 240 V
ToleranceDC 20, 4 - 297 V ..... AC 20 - 264 V 50/60 Hz
Power consumption< 3 W ..... < 7 VA
Output3 x co (change-over)
Switching voltagemax. AC 415 V
Switching currentmax. 5 A
Switching powermax. 1250 VA (resistive load)
max. 120 W at DC 24 V
UL electrical ratings250 V ac, 5 A, resistive
E214025240 V ac, 1/2 hp
120 V ac, ¼ hp
B 300 – pilot duty, UL 508
Rated operational current Ie 
AC15Ie = 3 A ..... Ue = 250 V
DC13Ie = 2 A ..... Ue = 24 V
Ie = 0,2 A ..... Ue = 125 V
Ie = 0,1 A ..... Ue = 250 V
Recommended fuse for contactsT 3,15 A (gL)
Expected contact life mechanical3 x 107 operations
Expected contact life electrical1 x 105 operations with AC 250 V / 6 A
Rated impulse voltage4000 V
Overvoltage categoryIII
Contamination level2
Rated insulation voltage Ui300 V
On-time100 %
emitted interferenceEN 61000-6-3
BurstEN 61000-4-4 +/-4 kV
Pulse 5/50 ns, f = 5 kHz, t = 15 ms, T = 300 ms
SURGEIEC 61000-4-5 +/-4 kV
Impulse 1,2/50 μs (8/20 μs)
discharge of static electricityIEC 61000-4-2 +/-4 kV contact, +/- 8kV air
Ambient temperature range-20 °C ... +65 °C
Storage temperature range-20 °C … +70 °C
AltitudeUp to 2000 m
Climatic conditions5 – 85 % rel. humidity, no condensation
External wiring temperature range-5 °C … +70 °C
Vibration resistance EN 60068-2-62…25 Hz ±1,6 mm
25 ... 150 Hz 5 g
Accuracy±0,5 % of value ±1 K (KTY ±5 K)
Sensor-current≤ 1 mA
Measuring time tM 
Mounting height55 mm
Width4 TE
Dimensions (W x H x D)70 x 90 x 58 mm
Line connection solid wireeach 1 x 1,5 mm2
Stranded wire with insulated ferruleseach 1 x 1,0 mm2
Torque0.5 Nm (3,6 lb.in)
Protection class housingIP 30
Protection class terminalsIP 20
Fitting positionany
MountingSnap mounting on 35 mm standard rail EN 60 715 or M4 screws
Weightapp. 200g