3-14 Installing the Drive 590 Series DC Digital Drive
Power Connections continued
3-Phase Supply, AC Line Choke
L1
L2
L3
Connect the
main ac power
to busbar
terminals L1,
L2 & L3 via
the Branch
Protection,
AC Filter
(optional),
3-Phase
External
Contactor, and
AC Line Choke.
Connect the
contactor coil
to terminals D5
& D6.
Main AC Power
There is no specific phase connection to terminals L1, L2 and L3 as the controller is phase rotation independent
Branch Protection
AC current = 0.83 x DC Armature Current
You must provide branch circuit protection using a suitable fuse to Type 2 circuit breaker (RCD,
ELCB, GFCI circuit breakers are not recommended, refer to “Earth Fault Monitoring Systems”, page
3-39). Also refer to Appendix B: “Certification” – Conditions for Compliance with UL508C.
Semi-Conductor Protection
Always provide high-speed thyristor fusing to protect the thyristor stack in the case of direct output short
circuits.
IMPORTANT
If a motor becomes completely short-circuited, the current
trip (OVER I TRIP) will not protect the Drive.
Refer to Appendix E: “Technical Specifications” – External Power Semiconductor Protection Fuses.
AC Filter (optional)
Refer to “External AC Supply EMC Filter Installation”, page 3-37.
DC
DRIVE
CHOKE
START
CONTACTOR
FILTER
(optional)
Diagram shows
correct
placement
of units
High Speed
Fuses
Branch
Protection
Fuses
590AC LINE
CHOKE FILTER
CO468398
Optional
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