Nidec Unidrive M600 Series - Page 52

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52 Unidrive M Regen Design Guide
Issue Number: 4
4.3.5 Brake resistor replacement to support up to 8 % THD
v
Figure 4-8 Power connections: Regen drive as a brake resistor replacement
PE
UVW
L1 L2 L3 PE
-DC +DC
L1
L2
L3
-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
+24VDC
L2
EMC
K1
F1 F2 F3
Tc.1
AC Supply
Connections
NOT USED
AC Supply
Connections
Motoring
drive DC
Connections
+24 output
Enable motor drive
Contactor closed
0common
Drive enable
K2
Trx
L1 L2 L3
L1
L2
L3 Motoring Drive
PE
F4 F5 F6
T.30
T.24
Rly.1
(optional)
S1
F7
F8
K2
Aux.2
Aux.2
Regen inductor
thermistor
0V
0V common
V
V
S6
Drive OK
Reset input
Contactor
control
Unidrive M
Regen drive
VDR1
VDR2
VDR3
VDR4
VDR5
VDR6
Cap bank A
Cap bank B
F12 F13 F14
Table 4-5 Key to Figure 4-8
Key Description
L1, L2, L3 Three phase supply
F1, F2, F3 Main Regen system supply fuses
F4, F5, F6 Regen drive fusing
F7, F8 DC Fusing (see Note)
VDR1, VDR2, VDR3 Varistor network line-to-line 550Vac
VDR4, VDR5, VDR6 Varistor network line-to-ground 680Vac
EMC EMC Filter
CBA Switching frequency filter capacitor bank A
CBB Switching frequency filter capacitor bank B
L2 Regen inductor
K1 Main supply switch or contactor
K2 Regen drive main contactor
Trx Isolating transformer
Aux.2 Regen drive main contactor auxiliary
Rly.1
Optional isolation for enable between Regen and motoring drive(s)
Mt.1 Motor thermistor
Tc.1 Regen inductor thermistor
+DC, -DC Motoring drive power connection to Regen drive
S1 Regen drive enable
S2 Motoring drive enable
S3 Motoring drive reset
S4 Motoring drive run forward
S5 Motoring drive run reverse
S6 Regen drive reset input (Pr 08.024 = Pr 10.033)
F12, F13, F14 Optional switching frequency filter capacitor fuses