Kendrion 7760016A00-0004, Руководство пользователя

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Operating Instructions BA 77 600..A00 // Last updated: 13/03/2020 // Page 12 of 33
Bridge rectification:
Bridge rectifiers provide voltage with minimum residual ripple. This allows brake humming to be avoided even
if small size brakes are used. In case of bridge rectification, the U
2
coil voltage is lower by factor 0.89 than the
rectifier input voltage.
AC side switching:
The easiest wiring method is to connect the rectifier in parallel with the brake in the terminal box of the machine
(e.g. motor). It must be considered, however, that the motor may act as a generator after AC voltage has been
removed and thus extend the coupling time significantly (by factor 5 or over). The disconnection times remain
unchanged.
DC side switching:
In case of DC side brake switching, an auxiliary contact is provided on the motor contactor, for example. This
auxiliary contact is designed to interrupt the power supply on the DC side.
Connected in parallel with the machine (e.g. motor) AC side switching
2
2
2
1
1
3
2
Rectifier
Brake field coil (1.2)
Rectifier with DC side
disconnection
1
3
DC side switching
- ~ ~ +
M
3~
L
1
L
2
L
3
U
- ~ ~ +
M
3~
L
1
L
2
L
3
U
- ~ ~ +
M
3~
L
1
L
2
L
3
U
Fig. 12/1: Suggested brake connection (circuit diagram, AC or DC side switching and
connected in parallel with the machine (e.g. motor))