NORDAC SK 750E manual
22 Technical design subject to change BU 0750 GB
2.9.5 Temperature sensor (T1, T2)
This input can be used for evaluation of a temperature sensor (PTC resistor or thermal relay)
which will prevent the motor from overheating.
When the impedance of the PTC resistor increases to too high a value or when the thermal relay
opens, the frequency inverter disconnects the output side reading out an overtemperature motor
error (E002).
If no temperature sensor is used, terminals T1 and T2 must be bridged.
To acknowledge an overtemperature fault, switch the power off and then on again, or operate the
ENTER key on a control panel (Control- or ParameterBox).
The control and temperature sensor lines should always be shielded-type and be routed at suffi-
cient distance from the motor cable (never within a common duct).
Too high a PTC resistor voltage is prevented by internal inverter control. For more detailed informa-
tion see Section 8, Error signals.
Evaluation of temperature sensor data can also be ensured via any of the optional custom interfaces
(SK CU1-...). This subject is dealt with in greater detail in Section 3.3, Overview of the custom interfaces.
2.9.6 Power supply terminals
Frame size 1:
SK 750E-551-323-A ... SK 750E-751-323-A (5.5 / 7.5kW, 230V)
SK 750E-551-340-A ... SK 750E-152-340-A (5.5 … 15kW, 400V)
Frame size 2:
SK 750E-921-323-A ... SK 750E-112-323-A (9.2 / 11kW, 230V)
SK 750E-182-340-A ... SK 750E-222-340-A (18.5 / 22kW, 400V)
To Next Page
Loading...
