Residual Hazards - Lenze 8210 HVAC Series Operating Instructions Manual

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Safety information

2.3 Residual hazards

Operator's safety
Protection of
devices
Overspeeds
2-4
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After mains disconnections, the power terminals U, V, W and + U
least three minutes.
-
Before working on the controller, check that no voltage is applied to the power terminals.
Cyclic connection and disconnection of the controller supply voltage at L1, L2, L3 or + U
-U may overload the internal input current load:
G
-
Allow at least 3 minutes between disconnection and reconnection.
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.
, -U remain live for at
G G
,
G