Lenze ECSEKxxx - Manual (Page 38)

Safety instructions
Residual hazards
1
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38 EDKCSEK002 DE/EN/FR 2.0
1.2 Residual hazards
Protection of persons
ƒ Before working on the capacitor module, check that no voltage is applied
to the power terminals,
– because the power terminals +UG and -UG at the supply module
remain live for at least 3 minutes after mains switch-off.
– because the power terminals +UG and -UG remain live when the motor
is stopped.
ƒ If an error occurs (short circuit to frame or earth fault), a DC residual
current may occur in the PE conductor. If an earth-leakage circuit breaker
(residual current device) is used for protection against direct or indirect
contact, only the use of an earth-leakage circuit breaker of type B is
permissible on the current supply side. Otherwise another protective
measure is to be used, as for example separation from the environment
by double or reinforced insulation, or separation from the mains by using
a transformer.
Device protection
ƒ All pluggable connection terminals must only be connected or
disconnected when no voltage is applied.
ƒ Observe polarity of the power terminals +UG, -UG, and PE during wiring.
ƒ The power may only be converted if the power supply module in the
power system is ready for operation and the charging current limitation is
short-circuited. Otherwise the charging current limitation can be
destroyed.
ƒ If the charging current limitation is active, a cyclic switching of the mains
voltage at the power supply module can overload and destroy the
capacitor. Therefore, at least three minutes have to pass between two
starting operations in the case of cyclic mains switching over a longer
period of time.