Magnetic Motor Control
Heater coils are rated to protect 40½°C rise motors, and open and
drip-proof motors having a service factor of 1.15 where the motor
and the controller are at the same ambient temperature.
For other conditions:
- For 50½°C, 55½°C, 75½°C rise motors and enclosed motors having
a service factor of 1.0, select one size smaller coil. - Ambient temperature of controller lower than motor by 26½°C
(47½°F) use one size smaller coil. - Ambient temperature of controller higher than motor by 26½°C
(47½°F) use one size larger coil.
Ultimate tripping current of heater coils is approximately 1.25
times the minimum current rating listed in the tables.
Manual Motor Control
Heater coils are rated to protect standard 40°C rise motors, and
open and drip proof motors having a service factor of 1.15 at
approximately 125% of rated motor current, and where controller and
motor are at same ambient.
Heater coil ranges provide for variations in all enclosure sizes
and designs, including internal heating. Selection tables are not
compromises or averaged values thereby providing maximum motor
output and life.
For other conditions:
- 50½°C or 55½°C rise motor and enclosed motor having a service
factor of 1.0 with protection at 115% of rated current, use one
size smaller coil. - Ambient temperature of controller lower than motor by:
8.5-16.7½°C (16-30½°F) use one size larger coil.
16.8-27.8½°C(31-50½°F) use two sizes smaller coil. - Ambient temperature of controller higher than motor by:
8.5-16.7½°C (16-30½°F) use one size larger coil. 16.8-27.8½°C
(31-50½°F) use two sizes larger coil.
| Desc | Type | 00-1½ | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|---|
| A10 |
Open Encl |
ST-1 ST-2 |
ST-3 ST-4 |
ST-5 ST-6 |
ST-7 ST-8 |
ST-16 ST-16 |
| A30 | Encl | ST-9 | ST-3 | ST-6 | ST-8 | ST-16 |
| A40 | Encl | ST-9 | ST-3 | ST-6 | ST-8 | ST-16 |
| A50 |
Open Encl |
ST-1 ST-2 |
ST-3 ST-4 |
ST-5 ST-6 |
ST-7 ST-8 |
ST-16 |
| B10 | both | ST-1 | ST-3 | ST-5 | ST-7 | |
| B50 | both | ST-1 | ST-3 | ST-5 | ST-7 | |
| C300 | both | ST-1 | ST-3 | ST-5 | ST-7 |
| Desc | NEMA | Open | 1 |
|---|---|---|---|
| MS Series | all | See table | |
| B100 Series | all | See table | |
| Cutler-Hammer A10 Heater Selection Chart | ||||||||
|---|---|---|---|---|---|---|---|---|
|
For OPEN Type Cat. No. A10, A50, B10, B50, C300.
For ENCLOSED Type Cat. No. B10, B50, C300 |
For ENCLOSED Type Cat. No. A10, A50 |
For OPEN Type Cat. No. A10, A50, C300.
For ENCLOSED type Cat. No. B10, C300, A800 |
For ENCLOSED Type Cat. No. A10, A30, A50 |
For OPEN Type Cat. No. A10, A50, C300.
For ENCLOSED type Cat. No. B10 |
For ENCLOSED Type Cat. No. A10, A30, A50 | For OPEN Type Cat. No. A10, A50, C300 | For ENCLOSED Type Cat. No. A10, A50 | |
| Catalog Number | Table ST-1 | Table ST-2 | Table ST-3 | Table ST-4 | Table ST-5 | Table ST-6 | Table ST-7 | Table ST-8 |
| Starter Size – Full Load Amps | ||||||||
| Sizes 00, 0, 1, 1 ½ | Size 2 | Size 3 | Size 4 | |||||
|
H1101 H1102 H1103 H1104 H1105 |
.167-.187 .188-.210 .211-.237 .238-.266 .267-.298 |
.155-.173 .174-.195 .196-.220 .221-.247 .248-.278 |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
|
H1106 H1107 H1108 H1109 H1110 |
.299-.334 .335-.376 .377-.422 .423-.474 .475-.532 |
.279-.310 .311-.349 .350-.391 .392-.441 .442-.495 |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
|
H1111 H1112 H1113 H1114 H1115 |
.533-.598 .599-.672 .673-.757 .758-.855 .856-.959 |
.496-.555 .556-.624 .625-.703 .704-.795 .796-.895 |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
|
H1116 H1117 |
.960-1.07 1.08-1.21 |
.896-.999 1.00-1.12 |
– – |
– – |
– – |
– – |
– – |
– – |
|
H1018 H1019 H1020 H1021 H1022 |
1.22-1.35 1.36-1.52 1.53-1.70 1.71-1.90 1.91-2.10 |
1.13-1.25 1.26-1.41 1.42-1.58 1.59-1.77 1.78-1.96 |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
|
H1023 H1024 H1025 H1026 H1066 H1027 |
2.11-2.33 2.34-2.62 2.63-2.93 2.94-3.27 3.28-3.64 3.65-4.06 |
1.97-2.17 2.18-2.44 2.45-2.72 2.73-3.04 3.05-3.38 3.39-3.73 |
– – – – – 3.72-4.10 |
– – – – – – |
– – – – – – |
– – – – – – |
– – – – – – |
– – – – – – |
|
H1028 H1029 H1030 H1031 H1032 |
4.07-4.55 4.56-5.03 5.04-5.59 5.60-6.25 6.26-6.92 |
3.74-4.18 4.19-4.63 4.64-5.15 5.16-5.68 5.69-6.30 |
4.11-4.59 4.60-5.07 5.08-5.65 5.66-6.29 6.30-7.00 |
3.86-4.31 4.32-4.77 4.78-5.31 5.32-5.90 5.91-6.55 |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
|
H1033 H1034 H1035 H1036 H1037 |
6.93-7.75 7.76-8.63 8.64-9.59 9.60-10.6 10.7-11.9 |
6.31-7.05 7.06-7.76 7.77-8.63 8.64-9.51 9.52-10.5 |
7.01-7.82 7.83-8.79 8.80-9.67 9.68-10.8 10.9-12.0 |
6.56-7.33 7.34-8.15 8.16-9.00 9.01-10.1 10.2-11.2 |
– 8.32-9.27 9.28-10.1 10.2-11.4 11.5-12.8 |
– 8.24-9.19 9.20-10.1 10.2-11.3 11.4-12.7 |
– – – – – |
– – – – – |
|
H1038 H1039 H1040 H1041 H1042 |
12.0-13.3 13.4-14.7 14.8-16.6 16.7-18.8 18.9-21.2 |
10.6-11.8 11.9-13.1 13.2-14.8 14.9-16.7 16.8-18.9 |
12.1-13.4 13.5-14.9 15.0-17.6 17.7-19.0 19.1-21.5 |
11.3-12.5 12.6-13.9 14.0-15.7 15.8-17.5 17.6-19.8 |
12.9-14.3 14.4-16.0 16.1-17.8 17.9-20.3 20.4-22.9 |
12.8-14.1 14.2-15.8 15.9-17.7 17.8-20.1 20.2-22.7 |
– – – – 20.6-23.3 |
– – – – 20.6-23.3 |
|
H1043 H1044 H1045 H1046 H1047 |
21.3-23.9 24.0-27.0 – – – |
19.0-21.3 21.4-24.1 24.2-27.0 – – |
21.6-24.5 24.6-27.9 28.0-32.0 32.1-36.6 36.7-41.8 |
19.9-22.3 22.4-25.4 25.5-28.7 28.8-32.5 32.6-36.6 |
23.0-26.0 26.1-29.5 29.6-33.5 33.6-37.8 37.9-42.8 |
22.8-25.5 25.6-28.9 29.0-32.5 32.6-36.7 36.8-41.0 |
23.4-26.3 26.4-30.8 30.9-34.0 34.1-38.3 38.4-43.4 |
23.4-26.0 26.1-30.5 30.6-33.6 33.7-37.9 38.0-42.9 |
|
H1048 H1049 H1050 H1051 H1052 |
– – – – – |
– – – – – |
41.9-45.0 – – – – |
36.7-41.0 41.1-45.0 – – – |
42.9-48.5 48.6-55.1 55.2-62.3 62.4-69.5 69.6-79.1 |
41.1-46.0 46.1-51.8 51.9-58.6 58.7-64.6 64.7-72.7 |
43.5-49.3 49.4-55.8 55.9-63.1 63.2-70.4 70.5-79.9 |
43.0-48.2 48.3-54.6 54.7-61.2 61.3-67.6 67.7-75.9 |
|
H1054 H1055 H1056 H1057 H1058 |
– – – – – |
– – – – – |
– – – – – |
– – – – – |
79.2-90.0 – – – – |
72.8-83.1 93.2-90.0 – – – |
80.0-91.7 91.8-105 106-121 122-135 – |
76.0-87.1 87.2-97.5 97.6-109 110-122 123-135 |