Westinghouse A200 Overload Relay Heater Elements for Motor Protection

Westinghouse A200 overload heater elements can be identified by the catalog number on one terminal. Heater selection should be based on the full load current and service factor which is listed on the motor nameplate.

If the motor and overload relay are in the same ambient, and the service factor of the motor is 1.15 to 1.25, pick heaters from the table below. If the motor service factor is 1.0 or a maximum of 115% protection is wanted, pick one size smaller heater than indicated.

For Type A and B Overload Relays, Size 00, 0, 1 and 2 Starters

Size Starter
Non Compensated Open Starters and Ambient Comp. Open and Encl. Starters
Non-Compensating Enclosed Starters
Heater Catalog Number
Block Type Overload Using 3 Heaters
Single Pole Type Overload
Block Type Overload Using 3 Heaters
Single Pole Type Overload
Full Load Current of Motor (Amps.)
F
O
R

S
I
Z
E

2

S
T
A
R
T
E
R
S
F
O
R

S
I
Z
E

1

S
T
A
R
T
E
R
S
F
O
R

S
I
Z
E

0

S
T
A
R
T
E
R
S
.25 - .27
.29 - .31
.24 - .25
.28 - .30
.28 - .31
.32 - .35
.26 - .28
.31 - .34
.32 - .34
.36 - .39
.29 - .31
.35 - .37
.35 - .38
.40 - .43
.32 - .35
.38 - .42
.39 - .42
.44 - .48
.38 - .39
.43 - .47
.43 - .46
.49 - .53
.40 - .43
.48 - .52
.47 - .50
.54 - .58
.44 - .47
.53 - .56
.51 - .55
.59 - .64
.48 - .51
.57 - .63
.56 - .62
.65 - .71
.52 - .57
.64 - .70
.63 - .68
.72 - .79
.58 - .63
.71 - .77
.69 - .75
.80 - .87
.64 - .70
.78 - .85
.76 - .83
.88 - .96
.71 - .77
.86 - .94
.84 - .91
.97 - 1.06
.78 - .85
.95 - 1.03
.92 - 1.00
1.07 - 1.16
.86 - .93
1.04 - 1.13
1.01 - 1.11
1.17 - 1.28
.94 - 1.03
1.14 - 1.25
1.12 - 1.22
1.29 - 1.41
1.04 - 1.16
1.26 - 1.38
1.23 - 1.34
1.42 - 1.55
1.14 - 1.25
1.39 - 1.52
1.35 - 1.47
1.56 - 1.71
1.26 - 1.37
1.53 - 1.67
1.48 - 1.62
1.72 - 1.87
1.38 - 1.51
1.68 - 1.83
1.63 - 1.78
1.88 - 2.06
1.52 - 1.65
1.84 - 2.01
1.79 - 1.95
2.07 - 2.26
1.66 - 1.81
2.02 - 2.21
1.96 - 2.15
2.27 - 2.48
1.82 - 1.99
222 - 2.43
2.16 - 2.35
2.49 - 2.72
2.00 - 2.19
2.44 - 2.66
2.36 - 2.58
2.73 - 2.99
2.20 - 2.39
2.67 - 2.92
2.59 - 2.83
3.00 - 3.28
2.40 - 2.63
2.93 - 3.21
2.84 - 3.11
3.29 - 3.60
2.64 - 2.89
3.22 - 3.53
3.12 - 3.42
3.61 - 3.95
2.90 - 3.17
3.54 - 3.87
3.43 - 3.73
3.96 - 4.31
3.18 - 3.47
3.88 - 4.22
3.74 - 4.07
4.32 - 4.71
3.48 - 3.79
4.23 - 4.61
4.08 - 4.39
4.72 - 5.14
3.80 - 4.11
4.62 - 4.9
4.40 - 4.87
5.15 - 5.6
4.12 - 4.55
5.0 - 5.5
4.88 - 5.3
5.7 - 6.2
4.56 - 5.0
5.6 - 6.0
5.4 - 5.9
6.3 - 6.8
5.1 - 5.5
6.1 - 6.6
6.0 - 6.4
6.9 - 7.5
5.6 - 5.9
6.7 - 7.3
6.5 - 7.1
7.6 - 8.2
6.0 - 6.6
7.4 - 8.0
7.2 - 7.8
8.3 - 9.0
6.7 - 7.2
8.1 - 8.7
7.9 - 8.5
9.1 - 9.9
7.3 - 7.9
8.8 - 9.7
8.6 - 9.4
10.0 - 10.8
8.0 - 8.7
9.8 - 10.5
9.5 - 10.3
10.9 - 11.9
8.8 - 9.5
10.6 - 11.7
10.4 - 11.3
12.0 - 13.1
9.6 - 10.5
11.8 - 12.7
11.4 - 12.4
13.2 - 14.3
10.6 - 11.5
12.8 - 14.0
12.5 - 13.5
14.4 - 15.7
11.6 - 12.6
14.1 - 15.3
13.6 - 14.9
15.8 - 17.2
12.7 - 13.8
15.4 - 16.6
15.0 - 16.3
17.3 - 18.9
13.9 - 15.1
16.7 - 18.3
16.4 - 18.0
19.0 - 20.8
15.2 - 16.7
18.4 - 20.0
18.1 - 19.8
20.9 - 22.9
16.8 - 18.3
20.1 - 21.9
19.9 - 21.7
23.0 - 25.2
18.4 - 20.2
22.0 - 23.9
21.8 - 23.9
25.3 - 27.6
20.3 - 22.2
24.0 - 26.2
24.0 - 26.2
27.7 - 30.3
22.3 - 24.3
26.3 - 28.8
26.3 - 28.7
30.4 - 33.3
24.4 - 26.6
28.9 - 31.4
28.8 - 31.4
33.4 - 36.4
26.7 - 29.1
31.5 - 34.5
31.5 - 34
36.5 - 39.9
29.2 - 32.0
34.6 - 37.9
34.6 - 37.9
40.0 - 43.9
32.1 - 35.2
38.0 - 41.9
38.0 - 41.5
35.3 - 38.5
42.0 - 45.0
41.6 - 45.0
38.6 - 42.3

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For Type A and B Overload Relays, Size 3 and 4 Starters

Size Starter
Ambient Compensated Encl. Starters
Non-Compensating Encl. Starters
Cat. No.
All Applications
Full Load Current of Motor Amps
F
O
R

S
I
Z
E

4

S
T
A
R
T
E
R
S
F
O
R

S
I
Z
E

3

S
T
A
R
T
E
R
S
12.8 - 14.1
11.9 - 13.0
14.2 - 15.5
13.1 - 14.3
15.6 - 17.1
14.4 - 15.9
17.2 - 18.9
16.0 - 17.4
19.0 - 20.8
17.5 - 19.1
20.9 - 22.9
19.2 - 21.1
23.0 - 25.2
21.2 - 23.2
25.3 - 27.8
23.3 - 25.6
27.9 - 30.6
25.7 - 28.1
30.7 - 33.5
28.2 - 30.8
33.6 - 37.5
30.9 - 34.5
37.6 - 41.5
34.6 - 38.2
41.6 - 46.3
38.3 - 42.6
46.4 - 50
42.7 - 46
51 - 55
47 - 51
56 - 61
52 - 56
62 - 66
57 - 61
67 - 73
62 - 67
74 - 78
68 - 72
79 - 84
73 - 77
85 - 92
78 - 84
93 - 101
85 - 91
102 - 110
92 - 99
111 - 122
100 - 110
123 - 129
111 - 122
130 - 133
123 - 128
129 - 133

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For Type A and B Overload Relays, Size 5, 6 Starters

Compensated Overload Relay
Heater Code Marking
Open Starter
Enclosed Starter
Full Load Current of Motor (Amps.)
-
-
118 - 129
118 - 129
130 - 141
130 - 141
142 - 155
142 - 155
156 - 170
156 - 170
171 - 187
171 - 187
188 - 205
188 - 205
206 - 224
206 - 224
225 - 244
225 - 244
245 - 263
245 - 263
264 - 292
264 - 270
293 - 300
-
Size 6 (With 600/5 current transformers)
-
-
236 - 259
236 - 259
260 - 283
260 - 283
284 - 310
284 - 310
311 - 340
311 - 340
341 - 374
341 - 374
375 - 411
375 - 411
412 - 448
412 - 448
449 - 489
449 - 489
490 - 527
490 - 527
528 - 585
528 - 540
586 - 600
-
Size 7 and Larger: Advise Full Load Current

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Heaters - For MS Starters

Motor Full Load Current
Catalog Number
Motor Full Load Current
Catalog Number
.4 - .43
MSH .5A
2.72 - 2.95
MSH 3.4A
.44 - .48
MSH .55A
2.96 - 3.27
MSH 3.7A
.49 - .53
MSH .61A
3.28 - 3.59
MSH 4.1A
.54 - .58
MSH .67A
3.60 - 3.99
MSH 4.5A
.59 - .64
MSH .74A
4.00 - 4.39
MSH 5.0A
.65 - .71
MSH .81A
4.40 - 4.79
MSH 5.5A
.72 - .78
MSH .89A
4.80 - 5.26
MSH 6.0A
.79 - .87
MSH .98A
5.27 - 5.83
MSH 6.6A
.88 - .95
MSH 1.1A
5.84 - 6.39
MSH 7.3A
.96 - 1.03
MSH 1.2A
6.40 - 7.03
MSH 8.0A
1.04 - 1.15
MSH 1.3A
7.04 - 7.74
MSH 8.8A
1.16 - 1.27
MSH 1.45A
7.75 - 8.46
MSH 9.7A
1.28 - 1.35
MSH 1.6A
8.47 - 9.35
MSH 10.6A
1.36 - 1.51
MSH 1.7A
9.36 - 10.30
MSH 11.7A
1.52 - 1.67
MSH 1.9A
10.31 - 11.35
MSH 12.9A
1.68 - 1.83
MSH 2.1A
11.36 - 12.47
MSH 14.2A
1.84 - 1.99
MSH 2.3A
12.48 - 13.67
MSH 15.6A
2.00 - 2.23
MSH 2.5A
13.68 - 15.12
MSH 17.1A
2.24 - 2.47
MSH 2.8A
15.13 - 16.00
MSH 18.6A
2.48 - 2.71
MSH 3.1A

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