SELECTION GUIDE

SMC Flex and SMC-3

Bulletin 150

SIZE FOR SIZE . . . BEST VALUE IN THE INDUSTRY

Bulletin 150

Smart Motor Controllers

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Bulletin 150 Reduced Voltage Starters

Features

SMC FlexController

SMC-3Controller

200690V11250 A

200600V1480 A

Soft Start S S

Kickstart S S

Current Limit S S

Dual Ramp Start S

Full Voltage S

Soft Stop S S

Pump Control O

Preset Slow Speed S

Linear Speed S

SMB Smart MotorBraking O

Accu-Stop O

Slow Speed with Braking O

Motor Protection S S

Communication S

Metering S

Keypad Programming/LCD Display S

Inside Delta Connection S S

Product Selection Page 2 Page 26

S = Standard FeatureO = Optional Feature

The SMC Flex controller is available for motors rated 11250 A;200480V AC, 200600V AC, or 230690V AC, 50/60 Hz. Inaddition to motors, the SMC Flex controller can be used to controlresistive loads.

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Bulletin 150

SMC Flex Smart Motor Controller

2

Product Overview

Bulletin 150 SMC Flex Smart Motor ControllerThe SMC Flex controller provides microprocessor controlled startingfor standard 3-phase squirrel-cage induction or Wye-Delta (6-lead)motors. Seven standard modes of operation are available within asingle controller.

11250 A RangeSeven Standard Start ModesOptions Include Pump Control and Braking Control

FeaturesBuilt in SCR Bypass/Run ContactorBuilt in Electronic Motor OverloadProtectionCT on each PhaseMetering

DPI CommunicationLCD DisplayKeypad ProgrammingFour Programmable AuxiliaryContacts

Standards Compliance/Approvals

Modes of OperationThe SMC Flex controller provides the following modes of operation as Standard:

Soft Start

This method covers the most general applications. The motor isgiven an initial torque setting, which is user adjustable. From theinitial torque level, the output voltage to the motor is steplesslyincreased during the acceleration ramp time, which is useradjustable.

Selectable Kickstart

The kickstart feature provides a boost at startup to break awayloads that may require a pulse of high torque to get started. It isintended to provide a current pulse, for a selected period of time.

Current Limit Start

This method provides current limit start and is used when it isnecessary to limit the maximum starting current. The starting currentis user adjustable. The current limit stating time is user adjustable.

Dual Ramp Start

This starting method is useful on applications with varying loads,starting torque, and start time requirements. Dual Ramp Start offersthe user the ability to select between two separate start profiles withseparately adjustable ramp times and initial torque settings.

Full Voltage Start

This method is used in applications requiring across-the-linestarting. The SMC controller performs like a solid-state contactor.Full inrush current and locked-rotor torque are realized. The SMCmay be programmed to provide full voltage start in which the outputvoltage to the motor reaches full voltage in 1/4 second.

Linear Speed Acceleration

With this type of acceleration mode, a closed-loop feedback systemmaintains the motor acceleration at a constant rate. The requiredfeedback signal is provided by a DC tachometer coupled to themotor (tachometer supplied by user 05V DC, 4.5V DC = 100%speed). Kickstart is available with this mode.

Preset Slow Speed

This method can be used on applications that require a slow speedfor positioning material. The Preset Slow Speed can be set for eitherLow, 7% of base speed, or High, 15% of base speed. Reversing isalso possible through programming. Speeds provided duringreverse operation are Low, 10% of base speed, or High, 20% ofbase speed.

Soft Stop

The Soft Stop option can be used in applications requiring anextended stop time. The voltage ramp down time is use adjustablefrom 0 to 120 seconds. The load will stop when the voltage drops toa point where the load torque is greater than the motor torque.

Table of Contents

Description ofFeatures......................... 4Cat. No. Explanation 5Product Selection ...... 6Options .......................... 16Accessories.................. 17Specifications.............. 19ApproximateDimensions andShipping Weights....... 24

UL 508EN/IEC 60947-4-2cULus Listed (open type) File No. E96956CE Marked (open type) per EMC Directive and Low Voltage DirectiveCCC (108480 A)

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Bulletin 150

SMC Flex Smart Motor Controller

3

Optional Modes of Operation

Braking Control

SMB Smart Motor Braking

This option provides motor braking for applications that require themotor to stop faster than a coast to rest. Braking control, withautomatic zero speed shut off, is fully integrated into the compactdesign of the SMC controller. This design facilitates a clean, straightforward installation and eliminates the requirement for additionalhardware such as braking contactors, resistors, timers, and speedsensors. The microprocessor based braking system applies brakingcurrent to a standard squirrel-cage induction motor. The strength ofthe braking current is programmable from 150400% of full-loadcurrent.

Accu-Stop

This option is used in applications requiring controlled positionstopping. During stopping, braking torque is applied to the motoruntil it reaches preset slow speed (7% or 15% of rated speed) andholds the motor at this speed until a stop command is given.Braking torque is then applied until the motor reaches zero speed.Braking current is programmable from 0400% of full-load current.Slow Speed Current is programmable from 0450% of full-loadcurrent. Slow speed can be programmed for either 7% (low) or 15%(high).

Slow Speed with Braking

Slow Speed with Braking is used on applications that require slowspeed (in the forward direction) for positioning or alignment and alsorequire braking control to stop. Slow speed adjustments are 7%(low) or 15% (high) of rated speed. Slow speed acceleration currentis adjustable from 0450%. Slow speed running current isadjustable from 0450% of full-load current. Braking current isadjustable from 0400%.

Not intended to be used as an emergency stop. Refer to the applicable standards for emergency stop requirments.

Optional Modes of Operation

Pump Control - Start and Stop

This option is used to reduce surges during the starting andstopping of a centrifugal pump by smoothly accelerating anddecelerating the motor. The microprocessor analyzes the motorvariables and generates commands which control the motor andreduce the possibility of surges occurring in the system. The pumpcontrol module also provides a built-in anti-backspin timer.

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Bulletin 150

SMC Flex Smart Motor Controller

4

Features

Description of Features

Electronic Motor Overload ProtectionThe SMC Flex controller incorporates, as standard, electronic motoroverload protection. This overload protection is accomplishedelectronically with an I2t algorithm.When coordinated with the proper short circuit protection, overloadprotection is intended to protect the motor, motor controller, andpower wiring against overheating caused by excessive overcurrent.The SMC Flex controller meets applicable requirements as a motoroverload protective device.The controllers overload protection is programmable, providing theuser with flexibility. The overload trip class consists of either OFF,10, 15, 20 or 30 protection. The trip current is programmed byentering the motor full-load current rating, service factor, andselecting the trip class.Thermal memory is included to accurately model motor operatingtemperature. Ambient temperature insensitivity is inherent in theelectronic design of the overload.

Stall Protection and Jam DetectionMotors can experience locked-rotor currents and develop hightorque levels in the event of a stall or a jam. These conditions canresult in winding insulation breakdown or mechanical damage to theconnected load. The SMC Flex controller provides both stallprotection and jam detection for enhanced motor and systemprotection. Stall protection allows the user to program a maximumstall protection delay time from 010 seconds. The stall protectiondelay time is in addition to the programmed start time and beginsonly after the start time has timed out. If the controller senses thatthe motor is stalled, it will shut down after the delay period hasexpired. Jam detection allows the user to determine the motor jamdetection level as a percentage of the motors full-load currentrating. To prevent nuisance tripping, a jam detection delay time,from 0.099.0 seconds, can be programmed. This allows the userto select the time delay required before the SMC Flex controller willtrip on a motor jam condition. The motor current must remain abovethe jam detection level during the delay time. Jam detection isactive only after the motor has reached full speed.

Underload ProtectionUtilizing the underload protection of the SMC Flex controller, motoroperation can be halted if a drop in current is sensed.The SMC Flex controller provides an adjustable underload tripsetting from 099% of the programmed motor full-load currentrating with an adjustable trip delay time of 099 seconds.

Undervoltage ProtectionThe SMC Flex controllers undervoltage protection will halt motor

operation if a drop in the incoming line voltage is detected.The undervoltage trip level is adjustable as a percentage of theprogrammed line voltage, from 099%. To eliminate nuisance trips,a