Lenze ECS series - Manual (Page 27)

Safety
Residual hazards
Residual hazards - ECSxE supply module
2

27 EDKCSXX0XX DE/EN/FR/ES/IT 4.0
2.3 Residual hazards
2.3.1 Residual hazards - ECSxE supply module
Protection of persons
ƒ Before working on the supply module, check that no voltage is applied to the power
terminals
– because the power terminals +UG, -UG, BR0 and BR1 carry hazardous voltages for
at least 3 minutes after mains disconnection.
ƒ The heatsink has an operating temperature of > 70 °C:
– Direct skin contact with the heatsink results in burnings.
ƒ The leakage current to PE is > 3.5 mA AC or > 10 mA DC. Therefore, two PE
connections are installed for protective reasons.
– Comply with the requirements of EN 50178 for high leakage currents!
ƒ For operation of the supply module on an earth-leakage circuit breaker:
– The supply modules are internally equipped with a mains rectifier. In the case of a
short circuit to frame, a non-pulsating DC residual current can prevent AC
-sensitive or pulsating DC-sensitive earth-leakage circuit breakers from being
tripped and thus neutralize the protective function for the whole equipment
operated on this earth-leakage circuit breaker.
Protection of devices
ƒ All pluggable terminals must only be connected or disconnected when no voltage is
applied!
ƒ The power terminals +UG, -UG and PE are not protected against polarity reversal.
– Observe the polarity when wiring the power terminals!
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