How to Build a Combination Manual Motor Starter Part 2 of 4 at AutomationDirect

we're building a combination manual motor starter using Fuji components offered by automation direct I'm Carrie Shyer and this is part two selecting the components a combination motor starter is configured using four major components a manual motor starter for circuit protection and manual starting and stopping of the motor a contor for switching the voltage to the motor a link module for connecting the manual motor starter and contactor together and a base plate for mounting all of the components together step one determine the frame size we will use combination starter selection tables to help select our components these tables are available in the automation direct catalog or in the technical support Fuji motor control selection guide on our website for motors from 1/2 to 10 horsepower at 240 volts or 3/4 to 20 horsepower at 4 180 volt we can use the 45 mm frame width for motors from 3 to 20 horsepower at 240 volt or 5 to 40 horsepower at 480 volt we can use the 55 mm frame you may have noticed that some of the motor horsepowers are available in both the 45 mm and 55 mm frame sizes so how do you determine which one is right for your application if you are using other 55 mm frames in the larger horsepower range then you may want to use all 55 mm frames otherwise use the 45 mm frame which will save panel space and it costs less than the 55 mm frame we'll be using a 30 horsepower motor at 480 volts which means we will be using a 55 mm frame step two select a manual motor starter we will be using the 55 mm selection table let's start by finding the correct voltage and horsepower when looking at the selection table you will notice there are two choices for a 30 horsepower motor this is because there are different adjustable current overload ranges available for the 30 horsepower motor to determine which range to use we must look at the name plate on the motor if the full load amp rating is 40 amps with a service factor of 1.15 then multiply 40 * 1.15 which equal 46 amp therefore we will select the MMS with a range of 35 to 50 amps which is part number bm3 vb- 050 found in column a step three select a contactor now that we have the MMS we will follow across the table to column B column B lists a contactor available for the MMS there are two contactors shown but four are available the contactor is selected based on the coil voltage the coil voltage is determined by your control voltage for a 110 volt AC coil select part number sc- E2 s-110 vac for a 220 volt AC coil replace a 10 vac with 220 vac the same for a 24v AC coil if using a 24volt DC coil select part number sc- E2 sg- 24vdc we are using a 110 volt AC coil so we will select the part number sc- E2 s-110 vac step four select a link module continue to follow across the table to the next column column C the link module part number is bz0 LV e51 a a step five select the base plate go to the last column column D and select the base plate the part number is bz0 bpv e51 a step six using in a UL Type e application if using in a UL Type e application there must be a visible means of indicating which type of function has occurred therefore a shortcircuit alarm contact block part number bz0 tkab must be installed we are now ready to assemble the combination motor starter