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Selectable kickstart, Current limit start – Rockwell Automation 150 SMC-Flex User Manual User Manual

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Product Overview

1-3

Selectable Kickstart

This feature provides a boost at startup to break away loads that
require a pulse of high torque to get started. This is intended to
provide a pulse of current that is selectable from 0…90% of locked
rotor torque. Selectable kickstart is user-adjustable from
0.0…2.0 seconds.

Figure 1.2 Selectable Kickstart

Current Limit Start

This starting mode provides a true current limit start; it is used when
limiting maximum starting current is necessary. The Current Limit
level is user-adjustable from 50…600% of the motor full load ampere
rating; and the current limit time is user-adjustable from 0…30
seconds. If the SMC-Flex controller senses that the motor has reached
the up-to-speed condition during the current limit starting mode, the
internal bypass contactor will be pulled in.

Figure 1.3 Current Limit Start

Kickstart is also available with Current Limit Start.

Start

Run

100%

Initial

Torque

Percent
Voltage

Time (seconds)

Selectable Kickstart

Soft Stop

Coast-to-rest

Soft Stop

Start

600%

50%

Percent Full

Load Current

Time (seconds)