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.
For continuous rated motors, with a service factor of 1.15 to
1.25,select the heater with maximum motor amperes equal
to or immediately greater than the motor full-load current
(provides a maximum of 125 percent protection). For
continuous rated motors with no service factor, multiply the
full-load current of the motor by 0.90 and use this value to
select the heater.
How to Select Heaters
The table below should be used to determine which column of
motor full load amperes applies for heater selection. Select in
order, the base catalog number, the NEMA type of enclosure,
and the column to be used in the proper table by NEMA size.
If full-load amperes of the motor falls between two ratings,
select heaters for the higher rating.
| Series | Description | Heater Table Column |
|---|---|---|
| CR306 | 3 phase, 3 pole, 3 leg protection standard | C |
| ambient compensated (except size 3 & 4) | D | |
| ambient compensated size 3 | D | |
| ambient compensated size 4 | E |
Table for CR110H & CR110Y Manual Starters … click here
| General Electric | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NEMA SIZES 00, 0 and 1 | NEMA SIZE 2 | NEMA SIZE 3 | ||||||||||
| Catalog Number |
Maximum Motor – Full Load Amps | Catalog Number |
Maximum Motor – Full Load Amps | Catalog Number |
Maximum Motor – Full Load Amps | |||||||
| A | B | C | D | A | B | C | D | C | D | |||
| CR123C118A | 1.12 | 1.09 | 1.04 | 1.02 | CR123C592A | 5.92 | 5.79 | CR123F357B | 31.8 | 31.3 | ||
| CR123C131A | 1.26 | 1.22 | 1.15 | 1.10 | CR123C630A | 6.23 | 6.12 | 5.85 | 5.72 | CR123F430B | 37.6 | 34.3 |
| CR123C695A | 6.63 | 6.49 | 6.47 | 6.30 | CR123F487B | 41.9 | 40.9 | |||||
| CR123C148A | 1.40 | 1.31 | 1.27 | 1.23 | CR123C778A | 7.72 | 7.59 | 7.35 | 7.04 | |||
| CR123C163A | 1.46 | 1.46 | 1.39 | 1.38 | CR123C867A | 8.96 | 8.71 | 8.06 | 7.91 | CR123F614B | 52.1 | 51.1 |
| CR123C184A | 1.63 | 1.59 | 1.55 | 1.49 | CR123F772B | 68.1 | 63.3 | |||||
| CR123C196A | 1.79 | 1.74 | 1.73 | 1.67 | CR123C104B | 10.4 | 10.1 | 9.61 | 9.27 | |||
| CR123C220A | 1.97 | 1.93 | 1.89 | 1.79 | CR123C113B | 11.7 | 11.2 | 10.5 | 9.99 | CR123F848B | 71.5 | 66.1 |
| CR123C125B | 12.1 | 11.9 | 11.6 | 11.1 | CR123F114C | 90.0 | 90.0 | |||||
| CR123C239A | 2.25 | 2.13 | 2.05 | 1.98 | CR123C137B | 13.5 | 12.6 | 12.5 | 12.1 | |||
| CR123C268A | 2.43 | 2.37 | 2.28 | 2.24 | CR123C151B | 14.7 | 14.5 | 13.6 | 13.1 | |||
| CR123C301A | 2.60 | 2.52 | 2.47 | 2.43 | ||||||||
| CR123C326A | 2.96 | 2.87 | 2.79 | 2.75 | CR123C163B | 18.3 | 17.7 | 16.7 | 15.5 | |||
| CR123C356A | 3.57 | 3.39 | 3.31 | 3.25 | CR123C180B | 20.1 | 19.1 | 17.9 | 16.8 | |||
| CR123C198B | 22.3 | 21.4 | 18.7 | 18.0 | ||||||||
| CR123C379A | 3.86 | 3.59 | 3.70 | 3.43 | CR123C214B | 25.0 | 22.9 | 20.4 | 19.7 | |||
| CR123C419A | 4.43 | 4.31 | 4.06 | 4.03 | CR123C228B | 27.7 | 24.7 | 22.7 | 21.6 | |||
| CR123C466A | 4.87 | 4.57 | 4.47 | 4.43 | ||||||||
| CR123C526A | 5.37 | 5.31 | 4.95 | 4.94 | CR123C250B | 29.3 | 25.9 | 24.7 | 23.9 | |||
| CR123C592A | 5.99 | 5.86 | 5.49 | 5.36 | CR123C237B | 30.7 | 27.1 | 26.3 | 25.5 | |||
| CR123C303B | 32.7 | 30.2 | 29.5 | 28.2 | ||||||||
| CR123C630A | 6.39 | 6.19 | 5.91 | 5.77 | CR123C330B | 35.6 | 34.8 | 32.5 | 31.6 | |||
| CR123C695A | 6.87 | 6.61 | 6.47 | 6.35 | ||||||||
| CR123C778A | 7.71 | 7.61 | 7.20 | 6.92 | CR123C400B | 45.0 | 45.0 | 41.9 | 37.8 | |||
| CR123C867A | 8.72 | 8.46 | 8.22 | 7.99 | CR123C440B | 43.2 | 40.6 | |||||
| CR123C104B | 10.5 | 10.4 | 9.67 | 9.19 | ||||||||
| CR123C113B | 11.7 | 11.3 | 10.4 | 10.0 | ||||||||
| CR123C125B | 12.2 | 11.9 | 11.0 | 10.7 | ||||||||
| CR123C137B | 13.5 | 13.0 | 12.4 | 12.0 | ||||||||
| CR123C151B | 15.1 | 14.5 | 13.2 | 12.9 | ||||||||
| CR123C163B | 17.5 | 17.4 | 15.4 | 15.1 | ||||||||
| CR123C180B | 18.9 | 18.6 | 17.1 | 16.3 | ||||||||
| CR123C198B | 20.8 | 20.5 | 18.1 | 17.9 | ||||||||
| CR123C214B | 22.4 | 22.3 | 20.0 | 19.7 | ||||||||
| CR123C228B | 25.5 | 25.7 | 22.5 | 21.2 | ||||||||
| CR123C250B | 26.2 | 25.7 | 22.5 | 22.3 | ||||||||
| CR123C273B | 27.0 | 27.0 | 23.9 | 22.3 | ||||||||
| CR123C303B | 26.3 | 25.5 | ||||||||||
| CR123C330B | 27.0 | 27.0 | ||||||||||
The table below gives a proper size heater to trip the switch
at approximately 125 per cent of motor current.
Listed values are for motors with 1.15/1.25 service factor.
For continuous rated motors with a service factor of 1.0,
multiply full-load current of motor by 0.9 and use this value
to select heater. If motor full-load amperes falls between
two ratings, select heater for the higher rating.
For 1.35 service factor motors, multiply full-load current of
motor by 1.15 and use this value to select heater(s).
| Max Full-load amps | Heater Catalog Number | 3.88 | CR123H446A |
|---|---|
| 4.60 | CR123H529A |
| 5.00 | CR123H575A |
| 5.43 | CR123H625A |
| 6.41 | CR123H739A |
| 6.98 | CR123H802A |
| 8.25 | CR123H950A |
| 10.6 | CR123H122A |
| 13.6 | CR123H157A |