Specifications

Soft Starter Units

These combination soft starter units contain a microprocessor-controlled

motor controller, control circuit transformer and either a fusible disconnect

switch or circuit breaker.

SMC-3 Soft Starter Units - Bulletin 2154H and 2155H Features

• Three starting modes: soft start, kick start and current limit

• Electronic overload protection with selectable overload trip class

• Motor and system diagnostics

• Configurable auxiliary contacts

• Soft stop

• Integrated bypass contactor

SMC Flex Soft Starter Units - Bulletin 2154J and 2155J Features

• Seven standard modes of operation: soft start, current limit start, dual ramp, full voltage, linear speed acceleration,

preset slow speed and soft stop

• Optional modes of operation: pump control, Smart Motor Braking ™, Accu-Stop™ and slow speed with braking

• Integral SCR bypass

• Electronic overload protection with selectable trip class

• Full metering and diagnostics

• Four programmable auxiliary contacts

• DPI communication

• LCD display

• Keyboard programming

Specify a soft starter rather than a variable frequency drive when the following is required:

• A cost effective starter

• No speed control

• Simple acceleration and deceleration

• Lower starting torque

• Generously sized motor for the load

• Standard starting and stopping manoeuvres

• Dynamic braking is not required

• The starter is not used to hold the rotor in place at zero speed

For additional information regarding soft starters, refer to the SMC Flex and SMC-3 Selection Guide,

publication 150-SG009

For SMC-3 soft starter unit selection, go to page 65

For SMC Flex soft starter unit selection, go to page 66

For soft starter unit options, go to page 67