Product Specification Guide
Model MSAC, Motor Starter Advanced Control

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Magnetic Motor Starters for 3 phase motors shall be enclosed in a 16 gauge steel, industrial polyurethane coated enclosure with the appropriate environmental rating. Starters shall consist of a horsepower rated magnetic contactor, a minimum of one Normally Open and one Normally Closed auxiliary control contacts and solid state electronic overload relay. Overload relay shall protect all three phases with an adjustable current setting of 1-40 amps to allow field adjustment for specific motor Full Load Amps (FLA). Interchangeable heater elements are not acceptable. 

The overload relay must provide the following motor protection features: If the FLA on the overload is set outside an acceptable range to properly protect the motor, the overload must trip and close a contact to indicate fault event. Overload relay shall provide phase failure, phase loss, cycle fault and stall protection. Overload must detect a locked rotor upon startup and trip within 0.5 seconds if such condition is detected. Overload must also monitor motor inrush current on startup and if detected FLA does not reach nominal running amps within 10 seconds, trip and stop the motor. Provide field selectable manual or automatic reset of overload as well as reset pushbutton on the starter cover to restore normal operation after a trip or fault condition. In the event of a power failure, starter shall restart in last known operating mode. 

When the starter is remotely controlled by an automation system, the starter shall include remote run terminals Model MSAC which accept both a voltage input signal and a contact closure. The voltage run input shall accept both AC and DC signals from 12-250V to allow direct connection of the transistorized automation signal to the starter. Starter must contain an integral current sensor with Normally Open contact which closes to indicate motor run status. 

Installed accessories shall include Hand-Off-Auto operation switch with LED pilot light indicators for Hand, Off, Auto, Run and Overload conditions. All pilot devices shall be water tight and dust tight. Manufacturer shall provide and install tags with engraved lettering to designate equipment served. All starters must be provided with a universal power supply capable of a 200 to 600 volt input range. 

Enclosed combination starters shall include all of the magnetic starter requirements in addition to a disconnecting method in accordance with National Electrical Code. Each disconnect shall be of the Motor Circuit Protector type, carry a UL 508F rating and provide a minimum interrupting rating of 30,000 Available Interrupting Current (AIC) for the combination starter. All disconnects shall include a lockout mechanism when in the off position. 

The starter shall provide a provision for Fireman’s Override operation. When activated, the starter must run the motor in any mode (Hand, Off or Auto) regardless of other inputs or lack of inputs either manual or auto. If the starter is controlled by a fire alarm or life safety system, the starter shall include an Emergency Shutdown input which will disable the starter from operating in either Hand or Auto mode regardless of other inputs either manual or auto. 

In applications where the motor is interlocked with a damper or valve and 24VDC actuator, control must be available within the starter enclosure. The starter must be able to provide a voltage output to operate the actuator to open the damper or valve without closing the motor circuit. The starter will only close the motor circuit and start the motor after it has received a contact closure from a limit or end switch confirming the damper or valve position. 
In the event of a power failure, starter shall also be capable of restart with 10 second delay, or restart in “off” mode. 

Starter must contain a Normally Open contact which closes when an overload trip condition occurs. 

The starter or combination starter shall be UL Listed.

END OF SECTION