Safety information
16
Operating instructions SVCD(S)
123456278
-
419A58
Elektrotechnische Anlagen GmbH
1
2.4
Residual hazards
Operator’s safety
After mains disconnections, the power ter and – remain live for several minutes.
Protection of the device
Cyclic connection and disconnection of the supply voltage at terminals L1, L2 und L3, may
overload the internal input current limitation:
Allow at least 1 minute between disconnection and reconnection.
2.5
General instructions
By this information to erectors and users of a plant hints on properties and
directions concerning the power feedback unit are given. These hints are not entitled to
completeness.
Special features in comparison towards a chopper
Unlike a braking resistor a power feedback device isn't a constant sink, but it's dependent
on the momentary characteristics of the supplying net. Commutation brake downs and
voltage-flicker in the net have a considerable effect to the backward current of the device.
In case of a short time voltage brake down the backward current has to rise correspond-
ingly to feedback the demanded power-amount. If the level of the supply voltage sinks
for a longer time, the maximum feedback power is reduced.
If only one phase fails, the device is able to work on, but the current in the two remaining
conductors will rise up to 150% of the normal level.
STOP
