Kendrion Classic Line 77600 A00 Series Manual page 12

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
rectifier input voltage.
M
3~
L L
1 2
Connected in parallel with the machine (e.g. motor)
M
3~
L
L
1
2
DC side switching
Fig. 12/1: Suggested brake connection (circuit diagram, AC or DC side switching and
connected in parallel with the machine (e.g. motor))
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.
2
- ~ ~ +
U
1
L
3
2
- ~
L
3
Operating Instructions BA 77 600..A00 // Last updated: 13/03/2020 // Page 12 of 33
coil voltage is lower by factor 0.89 than the
2
M
3~
L
L
1
2
AC side switching
1
2
3
~ +
U
3
2
- ~ ~
U
1
L
3
Rectifier
Brake field coil (1.2)
Rectifier with DC side
disconnection
+