Connecting-Up - Siemens Simovert Masterdrives Operating Instructions Manual

08.2009
7

Connecting-up

DANGER
NOTICE
Siemens Controls
Siemens AG 6SE7087-6JD50
SIMOVERT MASTERDRIVES
SIMOVERT MASTERDRIVES units are operated at high voltages.
The equipment must be in a no-voltage condition (disconnected from
the supply) before any work is carried out!
Only professionally trained, qualified personnel must work on or with
the units.
Death, severe bodily injury or significant property damage could occur if
these warning instructions are not observed.
Only create electrical connections if the unit is in a no-voltage condition!
Hazardous voltages are still present in the unit up to 5 minutes after it
has been powered down due to the DC link capacitors. Thus, the
appropriate delay time must be observed before working on the unit or
on the DC link terminals.
The power terminals and control terminals can still be live even when
the motor is stationary.
If the DC link voltage is supplied centrally, the converters must be
reliably isolated from the DC link voltage!
When working on an opened unit, it should be observed that live
components (at hazardous voltage levels) can be touched (shock
hazard).
The user is responsible that all the units are installed and connected-up
according to recognized regulations in that particular country as well as
other regionally valid regulations. Cable dimensioning, fusing,
grounding, shutdown, isolation and overcurrent protection should be
particularly observed.
Due to their physical characteristics, converters can produce DC
residual currents. If a residual-current protective device (residual-
current-operated circuit-breaker) is used on the supply side of the
AC/AC converter - or of the rectifier unit in the case of multi-motor
drives - for protective purposes in case of indirect touching, only type B
to IEC 755 is permitted. Due to radio-interference suppression
capacitors and as a result of the parasitic capacity of the motor cable,
leakage currents flow which can lead to undesired responding of the
residual-current protective device.
In general, operation without faults is possible only under the following
conditions:
♦ Rated residual current of the residual-current protective
device ≥ 300 mA
♦ Short motor cables (l < 20 m)
♦ No radio-interference suppression filter built in
• Only one converter connected per residual-current protective device
Operating Instructions
Connecting-up
7-1