Temperature-Relay Type TR250

3 Sensors Pt 100 (RTD), Pt 1000, PTC or KTY, 3 Limits

NEW: Alarm counter and preset programs for use with PTC thermistors only

Temperature-Relay Type TR250

Part number


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Product description

 

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 Us

.......

AC/DC 24 – 240 V

 

Tolerance

.......

DC 20, 4 - 297 V  .....  AC 20 - 264 V 50/60 Hz

 

Power consumption

.......

< 3 W  ..... < 7 VA

 

Relay output

Output

.......

3 x co (change-over)

 

Switching voltage

.......

max. AC 415 V

 

Switching current

.......

max. 5 A

 

Switching power

.......

max. 1250 VA (resistive load)
max. 120 W at DC 24 V

 

UL electrical ratings

.......

250 V ac, 5 A, resistive

 

E214025

.......

240 V ac, 1/2 hp
120 V ac, ¼ hp
B 300 – pilot duty, UL 508

 

Rated operational current Ie

AC15

.......

Ie = 3 A  .....  Ue = 250 V

 

DC13

.......

Ie = 2 A     .....  Ue = 24 V
Ie = 0,2 A  .....  Ue = 125 V
Ie = 0,1 A  .....  Ue = 250 V

 

Recommended fuse for contacts

.......

T 3,15 A (gL)

 

Expected contact life mechanical

.......

3 x 107 operations

 

Expected contact life electrical

.......

1 x 105 operations with AC 250 V / 6 A

 

Test conditions (EN 61010-1)

Rated impulse voltage

.......

4000 V

 

Overvoltage category

.......

III

 

Contamination level

.......

2

 

Rated insulation voltage Ui

.......

300 V

 

On-time

.......

100 %

 

EMC-tests (EN 61326-1)

emitted interference

.......

EN 61000-6-3

 

Burst

.......

EN 61000-4-4 +/-4 kV
Pulse 5/50 ns, f = 5 kHz, t = 15 ms, T = 300 ms

 

SURGE

.......

IEC 61000-4-5 +/-4 kV
Impulse 1,2/50 μs (8/20 μs)

 

discharge of static electricity

.......

IEC 61000-4-2 +/-4 kV contact, +/- 8kV air

 

Environmental conditions

Ambient temperature range

.......

-20 °C ... +65 °C

 

Storage temperature range

.......

-20 °C … +70 °C

 

Altitude

.......

Up to 2000 m

 

Climatic conditions

.......

5 – 85 % rel. humidity, no condensation

 

External wiring temperature range

.......

-5 °C … +70 °C

 

Vibration resistance EN 60068-2-6

.......

2…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

.......

<2,5 s (depending on number and type of connected sensors)

 

Housing (type V 4)

Mounting height

.......

55 mm

 

Width

.......

4 TE

 

Dimensions (W x H x D)

.......

70 x 90 x 58 mm

 

Line connection solid wire

.......

each 1 x 1,5 mm2

 

Stranded wire with insulated ferrules

.......

each 1 x 1,0 mm2

 

Torque

.......

0.5 Nm (3,6 lb.in)

 

Protection class housing

.......

IP 30

 

Protection class terminals

.......

IP 20

 

Fitting position

.......

any

 

Mounting

.......

Snap mounting on 35 mm standard rail EN 60 715 or M4 screws

 

Weight

.......

app. 200g