Instruction Manual ZHK
80/129
V07-19.0
Voltages must not exceed 5 V at the temperature sensor. This leads to its de-
struction!
Alternative to PTC: Motors with integrated bimetal sensor (thermal contact, Clixon) - op-
tional
Bimetal detectors are used for thermal monitoring of motor windings and consist of two successive
rolled metals, with unequal thermal expansion coefficients. When they are heated, they expand un-
evenly and can switch a contact. They have the advantage that they can be placed directly on the
switch and so no special relay (as for PTC) is needed.
Block diagram for connection: refer to
Figure 174:
Wiring diagram for thermal contacts
ETA - AHU
These AHUs are as, standard equipped, with a circuit protection switch and frequency converters,
if not equipped with EC motors. When the motor is equipped with a PTC, it is connected to fre-
quency converter to monitor the temperature.
Motor connection
The three-phase motor must be connected dependent on the used supply voltage, according to the
information on the rating plate (see
) and in the terminal box (see
) of the
motor.
Figure 175:
Motor rating plate
Figure 176:
Motor terminal box
Summary of Contents for ZHK Series
Page 1: ...ZHK INSTRUCTION MANUAL ...
