Unidrive Spmc - Emerson SP1201 Installation Manual

Safety Product
Introduction
Information information
-DC
+DC
T.24
T.30
U V W
PE
0V common
Motor thermistor
Mt.1
Drive healthy
NOTE
DC bus fusing is required for all motoring drives in a single Regen,
multiple drive system in both the +DC and -DC.
NOTE
VDR4, VDR5 and VDR6 when operating with a 690Vac supply should
consist of two varistors each in series as detailed in Table 3-24 on
page 28.
See Chapter 10 Technical data on page 183 for fuse rating information.

Unidrive SPMC

For a regen system, the SPMC can be used to charge the common DC
bus when the power is first applied, however this will once the regen
system is powered up no longer be required.
The Unidrive SPMC must be supplied with 24Vdc to feed both the fans
and control circuits. This 24Vdc can also be used as a means of starting
and stopping the SPMC rectifier as the SPMC will only fire its thyristors
when the 24Vdc is present.
Fitting a 5A relay interlocked (or a normally closed auxiliary contact) to
the Regen drives main contactor to switch the 24V supply will allow the
SPMC to charge the common DC bus then be disabled (optional).
The total amount of capacitance on the common DC bus that the SPMC
can drive is limited due to the inrush current (produced during power up
and during brownouts).
See the following Table for the capacitance limit.
Unidrive SP drive DC bus capacitance levels are available in Table 11-
1 on page 203.
Unidrive SP Regen Installation Guide
Issue Number: 2
System Mechanical Electrical
design installation installation
F7
F8
+24V output
Drive reset
Run forward
Run reverse
0V common
Drive enable
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Getting
Optimisation Parameters
started
U V W
PE
0V common
Motor thermistor
Mt.2
Drive healthy
Technical Component
Diagnostics
data sizing
F9
F10
+24V output
Drive reset
Run forward
Run reverse
0V common
Drive enable
35