Overload heater chart

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To prevent overloading the starter, do not select heater s for a motor of larger rating than the maximum given on the nameplate for the starter. For continuous rated motors, with a service factor of 1. For continuous rated motors with no service factor, multiply the full-load current of the motor by 0. The table below should be used to determine which column of motor full load amperes applies for heater selection. If full-load amperes of the motor falls between two ratings, select heaters for the higher rating.

Overload heater chart

For maximum motor protection and compliance with Article of the National Electrical Code, select heater coils from the tables in this section on the basis of motor nameplate full load current. When the full load current is unknown, selection may be made on the basis of average full load currents as shown HERE Motor Rating Data. Caution—The average ratings could be high or low for a specific motor and therefore selection on this basis always involves risk. For fully reliable motor protection, select heater coils on the basis of full load current rating as shown on the motor nameplate. Ultimate tripping current of heater coils is approximately 1. General Information On Heater Coil Selection For maximum motor protection and compliance with Article of the National Electrical Code, select heater coils from the tables in this section on the basis of motor nameplate full load current. When the full load current is unknown, selection may be made on the basis of average full load currents as shown HERE Motor Rating Data Caution—The average ratings could be high or low for a specific motor and therefore selection on this basis always involves risk. For Size 3 Starters. Heater One Heater per Part Number. Open and Enclosed Starters. Non-Compensating Enclosed Starters.

I have replaced many failed solid state overloads, but hardly ever have a thermal overload fail and if it does is usually more overload heater chart being abused in some way vs just wearing out. Location Illinois.

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Overload heater chart

Log in. Sign up. JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. In the page with the table, if you do the math. The heater ampere is FLA x 1.

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GE Heater Selection Information To prevent overloading the starter, do not select heater s for a motor of larger rating than the maximum given on the nameplate for the starter. Log in. Personal Growth Documents. Flag for inappropriate content. For continuous rated motors, with a service factor of 1. And just cross reference it staight across. Most these starters if you look in catalogs for thermal element selection, you need to determine some characteristics of the application before you know which selection table to use. Philips mcm Ver1. Didn't think so. Maybe this is why your supervisor is saying to upsize - is your MCC located outdoors? Din Din To pile on about following the manufacturer's instructions: MCCs in particular are required to be rated for 40C F operation. Heat, so the wire was also upped? I don't know that there are a lot of people that really know how to make the right selection for their application, and newer solid state overload devices don't help.

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Click to expand But this is new to me, I have always figured most MCC's had the service factor calculated into their charts. Just a note, on the refinery side of things, we see 1. Heat, so the wire was also upped? For continuous rated motors, with a service factor of 1. Isaiah Senior Member. New posts. Report this Document. All conditions can be same and yet you still will find there are different chart for one vs. Location NE Nebraska. I was just needing some clarification. Did you find this document useful? Location Illinois.