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36
Unidrive SP Regen Installation Guide
www.controltechniques.com Issue Number: 2
4.2.3 Single Regen, multiple motoring system using an external charging resistor
Figure 4-3 Power connections: Single Regen, multiple motoring system
Table 4-3 Key to Figure 4-3
Figure 4-3 shows both the power and control connections for the
multiple motoring regen solution. For this multiple motoring system
solution an external charging circuit is required due to the additional
capacitance from the multiple motoring drives. The external charging
circuit is interlocked with the Regen drive enable to prevent operation
with this circuit still connected.
For sizing of the external charging circuit required for the multiple
motoring drive system, refer to Chapter 11
page 203. For details on charging resistors and protection refer to
section 10.4.2
Softstart resistor - type TG series
For the multiple motoring drive solution, the Regen drive and associated
external components must be sized to the total power requirements of all
motoring drives.
The regen inductor duty is very arduous and therefore selection is
critical. As a result only regen inductors specified in this guide should be
used.
U
V
W
L1
L2
L3
PE
-DC +DC
-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
K2
L2
RFI
F1
F2
F3
VDR1
VDR2
VDR3
VDR4
VDR5
VDR6
Tc.1
L1
L2
L3
K2
Aux.2a
AC Supply
Connections
Motoring
drive DC
Connections
Aux.3
OPD2
Rs.1
+
2
4
o
u
tput
En
ble
m
otor
d
rive
Co
ntacto
r
c
lose
d
0
c
o
mmon
Drive
e
nable
K3
T.30
T.24
Rly.1
optional
L1
Regen drive
S1
Aux.1
K1
Aux.2a
Regen
inductor
thermistor
0V
common
V
V
a
S6
Aux.3
Drive
healthy
Reset
input
Contactor
control
AC Supply
Connections
NOT USED
K3
Vsupply
Aux.2b
Vsupply
F8
F9
Aux.2b
Charging branch circuit
C1
OPD1
Aux.1
Key
Description
L1, L2, L3
Three phase supply
F1, F2, F3
Main regen system supply fuses
VDR1, VDR2, VDR3
Varistor network line-to-line
VDR4, VDR5, VDR6
Varistor network line-to-ground
F4, F5, F6, F7
DC bus fusing to motoring drive
F8, F9
DC Bus fusing to regen drive
RFI
Optional RFI filter
C1
Switching frequency filter capacitor
L1
Switching frequency filter inductor
L2
Regen inductor
K1
Main supply contactor
K2
Regen drive main contactor
K3
Charging contactor
OPD1
Overload protection device for C1
OPD2
Overload protection device for Rs.1
Aux.1
OPD1 NO auxiliary contact
Aux.2a
K2 NO auxiliary contact
Aux.2b
K2 NC auxiliary contact
Aux.3
K3 NC auxiliary contact
Rly.1
Optional isolation for enable between Regen and motoring
drive(s)
Mt.1
Motor thermistor 1
Mt.2
Motor thermistor 2
Tc.1
Regen inductor thermistor
Rs.1
Charging resistor
+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
8.24
= Pr
10.33
)
Vsupply
System control suply
NOTE
NOTE
Содержание SP1201
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