Start-Up - Siemens SIMOVERT MASTERDRIVES 6SE7087-6CX87-2DA1 Manual Del Usuario

05.2009
6

Start-Up

DANGER
NOTE
Siemens AG 6SE7087-6CX87-2DA1
SIMOVERT MASTERDRIVES
Do not remove the front cover when voltage is applied to the
braking unit!
The control circuit is directly connected to the DC bus voltage!
The unit must therefore be disconnected from the supply before the
setting of the response threshold switch is adjusted.
The units have hazardous voltage levels up to 5 min. after the unit has
been powered-down due to the DC link capacitors.
Switch S1 for response threshold:
It is possible to switch over the response threshold on the braking units.
This can be useful for units operating on a supply system with 380 V /
400 V, 500 V or 660 V. In this case, the DC link voltage increases only
slightly in braking mode, thus reducing the voltage load on the motor
insulation.
For 1LA1/5/6/8/ type SIEMENS motors the voltage limit does not need
to be changed.
If the voltage limit switch S1 is set to the lower limit, the peak braking
power P3 is reduced (P~V
Braking Unit
2
).
Start-Up
6-1