Safety instructions
Residual hazards
2
2.3

2.3−2
EDSVF9383V EN 7.1−04/2012
Æ’ For some controller settings, the connected motor may overheat (e.g.
when operating the DC injection brake or a self−ventilated motor at
low speed for longer periods).
– Using an overcurrent relay or a temperature monitoring device
provides a large degree of protection against overload.
– We recommend to use PTC thermistors or thermal contacts for motor
temperature monitoring. (Lenze three−phase AC motors are equipped
with thermal contacts (NC contacts) as standard)
– PTC thermistors or thermal contacts can be connected to the
controller.
Æ’ Drives can attain dangerous overspeeds (e.g. setting of high output
frequencies with motors and machines not qualified for this purpose).
Motor protection
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