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
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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
- Replacement for Elbag/Joppich TS-02
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
- Accessory: Front mounting kit type ER4
- Alternative: Temperature relay Type TR640IP
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
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