DMI
44
11/04 MN01219002Z-EN
Motor starter
This menu is used to specify whether the DMI is to perform
the functions of a motor starter with the relevant parameters
or whether it is only to carry out the basic DMI functions
(visualization, parameter assignment and operation of the
circuit-breaker).
The DMI can perform different motor starter functions in
conjunction with the NZM2/3/4-ME circuit-breakers, which
are specially designed for motor protection:
• Direct-on-line starter,
• Reversing starter,
• Star-delta starter,
• Reversing star-delta starter.
The individual functions are (On/Off, Clockwise/
Anticlockwise) activated either via Pushbuttons or switches
on the inputs I1 to I3 of the DMI or via the fieldbus
(requirements: connected fieldbus module, e.g. NZM-XDMI-
DPV1).
The outputs Q0 to Q3 are used by the DMI to control the
contactors and implement the starter function required.
The principle motor protection assignment with the DMI is
indicated on Fig. 7, Page 45.
With all motor starter variants, the circuit-breaker is
connected in series upstream of the contactor(s).
The circuit-breaker takes over the short-circuit shut down
task and controls the shutdown of the contactors via the DMI
during an overload.
MOTOR START.
Function
CONT.ELEMENT
Changeover t
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