590 Series DC Digital Drive Installing the Drive
3-13
Power Connections
3-Phase Contactor
D5
D6
Connect a
3-phase
contactor in
the main ac
power supply
connections,
with a rating
suitable (AC1)
for the drive
concerned.
The contactor does not switch current and is primarily for disconnection and sequencing of the power bridge. The main contactor must be
energised directly from the controller by connecting the coil to terminals D5 (Line) and D6 (Neutral). No additional series contacts or
switches are permitted since they will interfere with the sequencing of the controller and cause unreliability and possible failure.
Note:
If the 3-phase contactor has a coil with an inrush greater than 3A, a slave relay must be used to drive the contactor coil.
The contactor and slave relay (if required) must have coil voltages compatible with the controller auxiliary supply voltage.
Do NOT use a slave relay with a coil current less than 25mA as it may be energised by the contact suppression network.
A dc contactor can be used but the sequencing must be adjusted to accommodate its use, an auxiliary normally open volt-
free contact of the contactor must be connected in series with the "enable" input C5 to disable the drive until after the
contactor is closed.
D6 D5 L1 L2 L3 PE
START
CONTACTOR
CON
3 PHASE
SUPPLY
HIGH SPEED
FUSES
FILTER
OPTIONAL
AC LINE CHOKE
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