Nidec Unidrive M600 Series - Page 47

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Unidrive M Regen Design Guide 47
Issue Number: 4
Where varistors other than those listed in Table 3-22 are fitted branch circuit protection may be required, where this is the case, follow the
manufacturers recommendations.
DC bus fusing is required for all motoring drives in a single Regen, multiple motoring drive system in both the +DC and -DC.
VDR1, VDR2 and VDR3 when operating with a 690 Vac supply should consist of two varistors each in series as detailed in Table 3-22 on page 38.
To prevent inductive voltage spikes surge suppressors should be fitted to the contactor coils.
See Chapter 10 Technical data on page 276 for fuse rating information.
SFF branch circuit protection may be required, refer to section 3.9.3 Switching frequency filter capacitor on page 30.
Ensure that cables from both capacitor banks to the fuses, where fitted, are of a similar length.
-DC
+DC
F4
F5
UVW
L1 L2 L3 PE
-DC +DC
21
1
2 3 4 5 6 7 8 9 10 11 41 42
22 23 24 25 26 27 28 29 30 31
T.30
T.24
S5
Mt.1
AC Supply
Connections
NOT USED
Connections
Motoring drive DC
Connections
U
V
W
PE
S2
S3 S4
Drive enable
0V common
Drive reset
Run forward
Run reverse
Motor thermistor
0V common
F6
F7
UVW
L1 L2 L3 PE
-DC +DC
21
1
2 3 4 5 6 7 8 9 10 11 41 42
22 23 24 25 26 27 28 29 30 31
S5
AC Supply
Connections
NOT USED
Connections
Motoring drive DC
Connections
U
V
W
PE
S2
S3 S4
Drive enable
0V common
Drive reset
Run forward
Run reverse
Motor thermistor
0V common
+24V output
+24V output
Motor Motor
Mt.2
Drive OK
Drive OK
Unidrive M
Motoring drive
Unidrive M
Motoring drive
NOTE
NOTE
NOTE
NOTE
NOTE
NOTE