Single Regen, Multiple Motoring System Using A Unidrive Spmc; Power Connections: Single Regen, Multiple Motoring System - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
4.2.2

Single Regen, multiple motoring system using a Unidrive SPMC

Figure 4-2 Power connections: Single Regen, multiple motoring system
L1
L2
L3
F1 F2 F3
K1
VDR4
RFI
L1
Table 4-2 Key to Figure 4-3
Key
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
F7, F8, F9, F10 DC bus fusing to motoring drive
F11, F12 DC bus fusing to Regen drive
F13, F14 SPMC DC fuse protection
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
Aux.1 OPD NO auxiliary contact
Aux.2a K2 NO auxiliary contact
Aux.2b K2 NC auxiliary contact
Aux.2c NC auxiliary for SPMC (optional)
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
+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 supply
34
System Mechanical
design installation
85
84
Unidrive
-DC
SPMC
+DC
L1 L2 L3
VDR3
VDR2
VDR6
Charging
L1
branch
circuit
AC Supply
Connections
Aux.3
K3
NOT USED
Regen drive
AC Supply
Connections
C1
U
K2
Aux.1
L2
Description
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installation started
Aux.2c
+24Vdc external supply
0V common
F13
F14
F12
F11
-DC +DC 21 22
L2 L3 PE
Motoring
drive DC
Connections
V W 1
2 3 4 5
2a 2b 2c
Aux
Figure 4-2 shows both the power and control connections for the
multiple motoring regen solution. For the multiple motoring system 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.
In this example, the external charging circuit consists of a Unidrive SPMC
module. Refer to section 3.5 Unidrive SPMC half controlled thyristor
rectifier on page 19 for further details of the Unidrive SPMC.
NOTE
For the multiple motoring drive solution, the Regen drive and associated
Unidrive SPMC must be sized to the total power requirements of all
motoring drives.
NOTE
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.
NOTE
Fusing F4, F5, F6 are only required where fusing F1, F2, F3 exceed
these. For example in a multiple regen drive system, where F1, F2, F3
equal total system current rating.
NOTE
The SPMC uses the regen inductor as line reactors. The SPMC may be
powered from the incoming supply using a standard line reactor if
required.
Technical Component
Parameters
data
Vsupply
Aux.2b
K3
Aux.2a
S6
23 24 25 26 27 28 29 30
6 7 8 9 10 11 41
Tc.1
Unidrive SP Regen Installation Guide
Diagnostics
sizing
-DC
+DC
S1
T.24
T.30
Rly.1
optional
31
42
K2
Vsupply
Issue Number: 2