ZIEHL TR250 User manual

ZIEHL industrie –elektronik GmbH + Co KG
Daimlerstr.13, 74523 Schwäbisch Hall, Germany
+ 49 791 504-0, [email protected]e, www.ziehl.de
Temperature Relays and MINIKA® Mains Monitoring Digital Panelmeters MINIPAN® Switching Relays and Controls Measuring Transducers Grid- and Plant Protection
Operating Manual TR250
updated: 2016-12-19/Sc
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- Temperature-Relay TR 250
New from firmware -01
Program Pr5 for protection of transformers with 2 PTC-circuits (sensor-alarm, pre-alarm and tripping)
Program Pr6 for Protection of transformers with 3 PTC-circuits (forced cooling, pre-alarm and tripping)
Display of firmware version: Press Set ► for 10 s (in display mode)

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Table of contents
1Display and operating elements............................................................................................................ 3
2Default Settings...................................................................................................................................... 5
3Application and short description......................................................................................................... 7
4Function Overview ................................................................................................................................. 7
5Connecting diagram............................................................................................................................... 7
6Function Diagram................................................................................................................................... 8
7Important notes ...................................................................................................................................... 9
8Installation ............................................................................................................................................ 10
9Putting into operation .......................................................................................................................... 10
9.1 Display Mode............................................................................................................................... 10
9.2 Programming Mode..................................................................................................................... 10
10 Operation .............................................................................................................................................. 13
11 Trouble-shooting and remedies .......................................................................................................... 14
11.1 Pre-Set ex works (WE) ................................................................................................................ 14
11.2 Display......................................................................................................................................... 14
11.3 Relay cannot be programmed –Code Lock................................................................................. 14
11.4 Displayed Temperature is different from Sensor-Temperature..................................................... 14
11.5 Display Error „Er1 or Er2“............................................................................................................ 14
11.6 Relay trips regularly without limit exceeded ................................................................................. 14
11.7 Firmware version......................................................................................................................... 14
12 Technical Data...................................................................................................................................... 15
13 Design V4.............................................................................................................................................. 17

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1 Display and operating elements
1, 2, 3 LEDs Alarm
OFF Switching point not exceeded
Flash Switching delay time dAL runs
ON Switching point exceeded, relay switches
Flash Switching back delay time doF runs
Flash Ready for Reset, switching interlocked
ON in programming mode Selected sensor or sensor group (8, 9, 10) acts on this alarm
4 3 digit digital display
Display temperature Appropriate LED Sensor is alight
Display alarm AL1 / AL2 / AL3, appropriate LED Alarm is alight
Display error massages Er1 = short-circuit in sensor or line
Er2 = break of sensor or line
Er3/4 = internal error of device
Err = common error
EEE = measured values too high
-EE = measured values too low
In programming mode Display of values and functions
see 10. Operation
5, 7 button ▲ or button ▼
Press short Switch to menu mode, the right decimal-point lights
Press for ≥2 s Display stored MIN- and MAX- temperature values of selected
sensor. Simultaneously pressing of button Set ► for ≥ 2 s deletes
all stored MIN- and MAX- temperature values.

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6 button Set / Reset ►
Press short Display next sensor
Press short in menu mode switch to programming mode, the right decimal-point flashes
Press short in
programming mode switch to next point, the set value will be stored
Press for 10 s when switching on supply voltage until displayed „Pr1“. With buttons ▲/▼it can be
select one of these options
Pr1 Program 1 (factory setting)
Pr2 Program 2
Pr3 Program 3
Pr4 Program 4
Pr5 Program 5 (from firmware -01)
Pr6 Program 6 (from firmware -01)
°C Resolution 1°C
0.1C Resolution 0,1°C
°F Resolution 1°F
With press „Set“ the device reboots. For a new selection this must be repeated.
Press for ≥ 2 s Reset Relay locked switching
Press for ≥ 4 s Display program number (from firmware -01)
Press for ≥ 10 s Display firmware version
8, 9, 10 LEDs Sensor
ON Temperature value of this sensor is being displayed
Flash Error of displayed sensor, associated alarm LED lights
2 or more LEDs Sensor ON Warmest of those sensors in display
Alternating illumination All sensor values are displayed for 2s each consecutively
ON in programming mode Selected sensor (8, 9, 10) or sensor error acts on this alarm
Hints:
- Longer pushing of ▲/▼ accelerates the changes in the display
- Button ▲/▼ pushed at the same time sets actual programmed parameter to zero

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2 Default Settings
Ex works, 6 programs are selectable. Based on these programs, the relay can be easily adapted to the
application. Normally only the temperatures of the alarms have to be changed.
Press button Set ► for 10 s when switching on supply voltage. After that the program Pr1 . . . Pr4 (from
firmware -01: Pr1 . . . Pr6) and/or the display value (°C / 0.1C / °F) can be selected with ▲/▼ and confirmed
with Set ►(°C = Resolution 1°C, 0,1C = Resolution 0,1°C, °F = Resolution 1°F).
Pr1: Protection of motors/generators with 3 sensors Pt 100 (Pr 1 is factory setting)
AL1 = pre-alarm,
AL2 = tripping,
AL3 = sensor-alarm (all sensors).
Pr2: Protection of transformers with 3 sensors Pt 100.
AL1 = forced cooling with a periodically test 1/week,
AL2 = pre-alarm and sensor-alarm (all sensors),
AL3 = tripping.
Pr3: Protection of transformers with 1 sensor Pt 100 and 2 PTC-circuits.
AL1 = forced cooling with a periodically test 1/week (Pt 100),
AL2 = pre-alarm and sensor-alarm (all sensors) (PTC),
AL3 = tripping (PTC)
Pr4: Single association
S1 –AL1,
S2 –AL2,
S3 –AL3
Pr5: Protection of transformers with 2 PTC-circuits (from firmware -01).
AL1 = sensor-alarm (sensor S2 and S3),
AL2 = pre-alarm
AL3 = tripping
Pr6: Protection of transformers with 3 PTC-circuits (from firmware -01).
AL1 = forced cooling with a periodically test 1/week
AL2 = pre-alarm and sensor-alarm (all sensors)
AL3 = tripping
Alarm (AL1...AL3) = Relay (1 … 3).
Sensor type PTC (thermistor): Display of resistance of sensor in kΩ

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Pr.-No.
Pr1 *
Pr2
Pr3
Pr4
Pr5 *1
Pr6 *1
App-
lication
Explanation
Motor-
protection
3x Pt 100
Transformer-
protection
3x Pt 100
Transformer-
protection
2xPTC
+1xPt 100
1 Sensor/
Relay
Trans-
former-
protection
2xPTC
Trans-
former-
protection
3xPTC
User
Data
S 1
Sensor-type
100 (3-L)
100 (3-L)
100 (3-L)
100(3-L)
nc
PTC
Alarm
1+2
1+2+3
1
1
-
1
S 2
Sensor-type
100 (3-L)
100 (3-L)
PTC
100 (3-L)
PTC
PTC
Alarm
1+2
1+2+3
2
2
2
2
S 3
Sensor-type
100 (3-L)
100 (3-L)
PTC
100 (3-L)
PTC
PTC
Alarm
1+2
1+2+3
3
3
3
3
AL1
Temperature (°C)
120
130
90
50
250
PTC
H
Hysteresis (°C)
-5
-10
-10
-2
-5
-
dAL
Switching-delay-time (s)
0
0
0
0
0
0
doF
Switching-back-delay (s)
0
999
999
0
0
999
rEL
Function of Relay
r
A
A
r
r
a
Err
Error (from sensor)
-
-
-
1
2+3
-
AL2
Temperature (°C)
130
140
PTC
50
PTC
PTC
H
Hysteresis (°C)
-5
-5
-
-2
-
-
dAL
Switching-delay-time (s)
0
0
0
0
0
0
doF
Switching-back-delay (s)
0
0
0
0
0
0
rEL
Function of Relay
r
r
r
r
a
r
Err
Error (from sensor)
-
1+2+3
1+2+3
2
-
1+2+3
AL3
Temperature (°C)
250
155
PTC
50
PTC
PTC
H
Hysteresis (°C)
-5
-5
-
-2
-
-
dAL
Switching-delay-time (s)
0
0
0
0
0
0
doF
Switching-back-delay (s)
0
0
0
0
0
0
rEL
Function of Relay
r
A
A
r
A
a
Err
Error (from sensor)
1+2+3
-
-
3
-
-
tSt
Periodically testing
OFF
ON
ON
OFF
OFF
ON
Alarm ON
-
AL1
AL1
-
-
AL1
don
Test period (h)
-
168
168
-
-
168
doF
Test time (h)
-
0,2
0,2
-
-
0,2
Si
Simulation
-
Cod
Code-lock on/off
oF
oF
oF
oF
oF
oF
PIN-Code
504
504
504
504
504
504
* Factory settings
*1from firmware -01

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3 Application and short description
Short Description
Thermostats TR 250 monitor up to 3 sensors at the same time. Output-relays and sensors can be associated
freely. Several programs like monitoring 3 sensors for the same switching point with common alarm (e.g. for
monitoring motors or transformers) are selectable.
Applications
Protection of motors or generators against overload, also with simultaneous monitoring of
temperatures in bearings
Protection of dry transformers against overload, also with control of a forced cooling
General protection of motors and machines against over-temperatures
Temperature-controller, also for refrigerating systems
Monitoring of differences in temperature
Resolution 0.1 °C for measuring range –19.9...99.9 selectable
4 Function Overview
sensor-inputs, Pt 100 (RTD) or Pt 1000 in 2- or 3-wire-connection
KTY 83, -84, PTC (thermistors)
relay-outputs (1 change-over-contact each)
universal power-supply AC/DC 24-240 V
5 Connecting diagram

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6 Function Diagram
Time of Response –Measuring-time t M
The time of response depends on the number of connected sensors and the measuring function. At
continuously change temperatures, measuring-time t M is app. 2 s. At rapidly changing temperature, such as
appears when simulating temperatures with a potentiometer, measuring time t M is app. 4 … 6 s.
Relay locked switching
In this mode, relay will only switch back, when switching-back-temperature has been reached, switching back
delay time has passed and a reset has been made (button, contact Y1-Y2 or switching off and on of the TR
250). Readiness is displayed by flashing (1:1) of appropriate alarm-LED.
sensor
LED Alarm
Relay r
Reset
t
tM
LED Alarm
(locked)
Relay (locked)
t M= measuring time
= LIMIT
= LIMIT+Hysteresis
doF
tM
dAL

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7 Important notes
DANGER!
Hazardous voltage!
Will cause death or serious injury. Turn off and lock out all power
supplying this device before working on this device.
To use the equipment flawless and safe, transport and store properly, install and start professionally and
operate as directed.
Only let persons work with the equipment who are familiar with installation, start and use and who have
appropriate qualification corresponding to their function. They must observe the contents of the instructions
manual, the information which are written on the equipment and the relevant security instructions for the
setting up and the use of electrical units.
The equipment is built according to DIN/EN/IEC and checked and leave the plant according to security in
perfect condition. To keep this condition, observe the security instructions with the headline „Attention” in the
instructions manual. Ignoring of the security instructions may lead to death, physical injury or damage of the
equipment itself and of other apparatus and equipment.
If, in any case the information in the instructions manual is not sufficient, please contact our company or the
responsible representative.
Instead of the industrial norms and regulations written in this instructions manual valid for Europe, you must
observe out of their geographical scope the valid and relevant regulations of the corresponding country.
Attention! When all relays are programmed in operation current mode
(=pick up at alarm), a loss of the supply voltage or an instrument failure
can remain unidentified. When the relay is applied as control
instrument, the operator must ensure, that this error is recognized by
regular examinations. We recommend to program and accordingly
evaluate at least one relay in the closed-circuit current mode.
Attention! Connection of Sensors
Temperature sensors must be connected to the plug-in terminals 1T1, 1T2, 1T3 etc. To ensure proper
operation this plug-in terminals have gold-plated contacts. Do not use these plugs for other terminals.
Universal power supply
The TR 250 universal power supply works within the range AC/DC 24-240 V. Before switching on make sure,
that the rated supply voltage Us of the type- plate and the mains voltage are the same.

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8 Installation
The unit can be installed as follows:
Installation in switchgear cabinet on 35 mm mounting rail according to EN 60715
With screws M4 for installation on walls or panel. (additional latch included in delivery)
Connection according to connection plan or type plate.
A circuit-breaker or switch must be situated within easy reach of the
unit and fused. Installation excess current protection should be ≤ 10 A.
9 Putting into operation
9.1 Display Mode
Indication of the actual temperature of the warmest sensor. LEDs (yellow) show, which sensor or group of
sensors is selected. Change with Set ►.
Indication of the stored minimum- resp. maximum-value: Press up ▲ or down ▼ for 2 s. Reset min/max with
Reset ►for 2 s.
Leave Display Mode with buttons ▲/▼.
Sensors type Pt ... resp. KTY ..: indication of temperature in °C (optional °F)
Sensor type PTC (thermistor): indication of resistance of sensor in kΩ
LEDs Sensor in Display Mode
ON Value of this sensor is being displayed
Flash Sensor Error
2 or more LEDs Sensor ON warmest of those sensors in display
Alternating illumination All sensor values are displayed for 2s each consecutively
LEDs Alarm in Display Mode
OFF Switching point not exceeded
ON Switching point exceeded, relay switches
Flash Switching delay time dAL runs
Flash Switching back delay time doF runs.
Flash Ready for Reset, switching interlocked.
Reset by button RESET ►or closing of a contact at terminals Y1-Y2.
A continuously closed contact at Y1-Y2 doesn’t result in a reset.
During periodical relay-test the appropriate LED lights up.
9.2 Programming Mode
Programming of sensors 1-3 (S1/S2/S3):
Select menu item with ▲/▼until S1 and type of sensor are alternating in the display, e.g. S1/100 for Pt 100.
Here it can be clearly read out, which type of sensor is selected and which alarms are affected by this
sensor (red LED Alarm on).
Enter into programming with Set ►.
Select type of sensor with ▲/▼ (diF can be selected at S3, if S1 and/or S2 are not PtC. with S3 =
diF it is handled as difference sensor 2 minus sensor 1).
Compensate line-resistance (enter value of resistance of line) or select 3-wire or nc (not connected,
if no sensor is connected to this input). At setting PtC no compensation of line-resistance is
necessary/possible.