Safety information
2-4
820XBA1097
2.3 Residual hazards
Operator’s safety
After mains disconnections, the power terminals U, V, W and + U
G
, -U
G
remain live for at
least three minutes.
-
Before working on the controller, check that no voltage is applied to the power terminals.
Protection of
devices
Cyclic
connection and disconnection of the controller supply voltage at L1, L2, L3 or + U
G
,
-U
G
may overload the internal input current load:
-
Allow at least 3 minutes between disconnection and reconnection.
Overspeeds
Drive systems can reach dangerous overspeeds (e. g. setting of inappropriately high field
frequencies):
-
The controllers do not offer any protection against these operating conditions. Use
additional components for this.
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