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ZIEHL industrie-elektronik, 74523 Schwäbisch Hall, Germany, +49 791 504-0, info@ziehl.de, www.ziehl.de
Features:
4 sensor-inputs Pt 100 (RTD)
and Pt 1000
Sensor-connection in 2- or
3-wire
Monitoring range
-199…+850°C /-199...+999°F
4 alarms / relays
Supply-voltage AC/DC 24-
240 V
Clearly arranged displays
and easy programming
Storing of values of MIN- and
MAX-temperature
Code-lock against uninten-
ded / unauthorized manipu-
lations of settings
Displays:
3 digit 7-segment-display
4 LEDs for sensor-inputs, LED
for sensor-error
4 LEDs for alarms
4 LEDs for state of relays
Display in °C or °F
Switching functions:
4 relay-outputs, change-over
(co) contacts
Relay for Fan max. 10 A
Adjustable (depending of
function)
Hysteresis 1…99 K
Switch- and switch-back-
delay 0…999 s
Operating- or closed-cur-
rent mode
Autoreset or electronic re-
closing lock
Cyclic start of fan (K1
only)
Option:
Interface RS485 (Modbus
RTU)
1
Function:
Pt100-Temperature-Relay Type TR440
4 Sensors Pt100 (RTD), Monitoring of Core, Panel-Mount
Monitoring Programs:
3 sensors in windings:
Alarms/outputs for:
Fan (with cyclic test)
Alarm
Trip
Sensor-Error
3 sensors in windings and 1 sensor in core:
Alarms/outputs for:
Fan (with cyclic test)
Alarm (winding and core)
Trip (winding and core)
Sensor-Error
For core and winding dierent limits can be program-
med.
3 sensors in windings and 1 sensor in core:
Alarms/outputs for:
Fan (with cyclic test)
Alarm (winding) / sensor-error (combined)
Trip (winding)
Trip (core)
Alarm 2 reports sensor-error and alarm
3 sensors in windings and 1 sensor in core:
Alarms/outputs for:
Trip (core)
Alarm (winding)
Trip (winding)
Sensor-Error
The relay for error (short-circuit or break of sensor-
lines) is preset in closed-current mode (alarm also at
loss of supply-voltage or failure in the device = moni-
toring of function of the device). All other relays are
in operating-current mode (pick up at an alarm = no
alarm when switching on and o supply-voltage). The
mode of the relays can be changed by the user.
Temperature-Relay for the
protection of transformers
from over-temperature and for
controlling a fan.
Monitoring of the temperatures
in the windings is made with 3
sensors. The input for the 4th
sensor can be used for moni-
toring the temperature in the
core or for a sensor for ambient
temperature.
The 4 alarms/relay-outputs control the fan and release
signals for alarm and trip if limits are exceeded. Dif-
ferent programs allow to adapt the required alarms to
the application. Depending on the program e.g. extra
alarms for sensor-error or for tripping because of over-
temperature in the core are available.
Other applications:
The forth sensor can be used to monitor the room,
in which the transformer is set up and the alarm can
control a forced cooling of the room.
The TR440 can also be used for the monitoring of
temperatures e.g. at motors.
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Pt 100-Temperature Relays Type TR
2015-03-30
2017-09-06
TR440
Part numbers:
T224184
T224185 RS485