Lenze EMB934x - Manual (Page 126)

Electrical installation
Circuit proposals
Controlled shutdown of the drive system
5
l
126 EDBMB9340 DE/EN/FR 12.0
5.5.2 Controlled shutdown of the drive system
For controlled shutdown of the drive network additional 935X brake choppers have to be
installed in the network.
The same circuit principle can be used if more braking energy than permissible in the
feedback operation is to be dissipated.
(
Stop!
The regenerative power supply module may be destroyed if the feedback
operation of the regenerative power supply module and the brake chopper are
active at the same time.
For this reason, the circuit must be arranged so that the feedback operation
will be inhibited when the DC−bus voltage reaches impermissible values.
PE U V W PE U V W
L1 L1 L1 L2 L2 L2 L3 L3 L3 +UG -UG
R
B
935x
+UG -UG
R
B
935x
24 V DC
K10
39 Ex Ex 28 28 Ax
K10
59 39 Ax 59 E1 39 A1 A2 59
934x Z2.1
Z4
Z2.n
PE PE PE +UG +UG +UG -UG -UG -UG
F4 F6 F8 F5 F7 F9
_
+
=
FAIL
L3’ L2’ L1’ L3.2L2.2L1.2
9340vrm009
Fig. 5−14 Circuit proposal − controlled shutdown of the drive system
934X Regenerative power supply module
Z2.1 ... Z2.n Controllers in the drive system
935x Brake chopper with brake resistor
Z4 Higher−level control (PLC, PC)
K10 Signalling relay "DC bus voltage too high"
F4...F9 DC−bus fuses