Overload Heater Sizing Chart

Overload Heater Sizing Chart – Heaters should be selected on the basis of the actual full load current and service factor as shown on the motor nameplate or in the manufacture's published literature. Under overload conditions, the heat causes a special solder to melt allowing a. Overload relay heater tables tables 291, 292, 293, 294 trip amps table 291 table 292 table 293 table 294 size fla 25, 30 40 50,60 heater code size fla 25, 30 40 50,60. Obtain full load current and service factor from motor nameplate or from motor manufacturer.

How To Size Motor Overload Heaters

Overload Heater Sizing Chart

Catalog no 14 c p 3 2 b c 81 phase size class find heater table number below, using the product class, controller size and phase. Select the heater and set the overload. In melting alloy thermal overload relays, the motor current passes through a small heater winding.

The Type A Thermal Overload Relay (Olr) Is A Bimetallic Device Which, With The Properly Selected Wire And Heaters, Will Provide Motor Protection For Running And Stalled Rotor.

If the motor fla is 365amps and the starter has a 600:5 ratio ct, take 600/5 = 120, then divide 365amps by 120 = 3.04 amps. The type a thermal overload relay (olr) is a bimetallic device which, with the properly selected wire and heaters, will provide motor protection for running and stalled rotor. Find heater table number below, using the product class, type of enclosure and control size.

Class 9065 Catalog For Overload Relays And Thermal Unit Selection.

Nema control siemens industrial control products heater tables and. This will provide integral horsepower motors with protection between 105 and 115%. Heater table number is found in the column under the type of overload can phase.

Select In Order, The Base Catalog Number, The Nema Type Of.

Westinghouse a200 overload relay heater elements for motor. Ge nema cr306 & cr386 magnetic starters. Ge molded case circuit breaker quick reference.

Heater Table Number Is Found In The Column.

This document also includes application data and approximate dimensions. The table below should be used to determine which column of motor full load amperes applies for heater selection.

westinghouse overload heater sizing chart Focus