230 VOLT 3 PHASE ( 240 VOLT CIRCUIT )

MORE FORMULAS WITHOUT OVERLOAD RELAYS WITH OVERLOAD RELAYS  

MOTOR

 HP

FULL

LOAD

AMPS

S.F.=1.15

OR

MORE TEMP. RISE

NOT OVER 40C

S.F.= LESS THAN

1.15

OR

TEMP. RISE MORE

 THAN 40C

S.F.=1.15

OR

MORE TEMP. RISE

NOT OVER 40C

S.F.= LESS THAN 1.15

OR

 TEMP. RISE

MORE THAN 40C

SWITCH

OR

FUSE CLIP RATING

1/2 2.5 2 1/2 2 1/4 2 1/2 2 1/2 30
3/4 2.8 3 1/2 3 2/10 3 1/2 3 1/2 30
1 3.6 4 1/2 4 4 1/2 4 1/2 30
1 1/2

5.2

6 1/4

5 6/10

7

6

30

2

6.8

8

7 1/2

9

8

30

3

9.6

12

10

12

12

30

5

15.2

17 1/2

17 1/2

20

17 1/2

30

7 1/2

22

25

25

30

30

30

10

28

35

30

35

35

60

15

42

50

45

60

50

60

20

54

60-

60-

70

70

100

25

68

80

75

90

80

100

30

80

100

90

100

100

100

40

104

125

110

150

125

200

50

130

150

150

175

150

200

75

192

225

200*

250

225

400

100

248

300

250

350

300

400

125

312

350

350

400

400

400

150

360

450

400*

450

450

600

200

480

600

500

600

600

600

480 VOLT 3 PHASE ( 480 VOLT CIRCUIT )

MORE FORMULAS WITHOUT OVERLOAD RELAYS WITH OVERLOAD RELAYS  

MOTOR

HP

FULL LOAD

AMPS

S.F.=1.15

OR

MORE TEMP. RISE

NOT OVER 40C

S.F.= LESS THAN

1.15

OR

TEMP. RISE MORE

 THAN 40C

S.F.=1.15

OR

MORE TEMP. RISE

NOT OVER 40C

S.F.= LESS THAN 1.15

OR

 TEMP. RISE

MORE THAN 40C

 

SWITCH

OR

FUSE CLIP RATING

 

1/2 1

1 1/4

1 1/8

1 1/4

1 1/4

30

3/4 1.4

1 6/10

1 6/10

1 8/10

1 8/10

30

1 1.8

2 1/4

2

2 1/4

2 1/4

30

1 1/2 2.6

3 2/10

2 6/10

3 1/2

3

30

2 3.4

4

3 1/2

4 1/2

4

30

3 4.8

5 6/10

5

6

5 6/10

30

5 7.6

9

8

10

9

30

7 1/2 11

12

12

15

15

30

10 14

17 1/2

15

17 1/2

17 1/2

30

15 21

25

20

30

25

30

20 27

30*

30*

35

35

60

25 34

40

35

45

40

60

30 40

50

45

50

50

60

40 52

60*

60*

70

60*

100

50 65

80

70

90

75

100

60 77

90

80

100

90

100

75 96

110

110

125

125

200

100 124

150

125

175

150

200

125 158

175

175

200

200

200

150

180

225

200*

225

225

400

200

240

300

250

300

300

400

 

* FUSE REDUCERS REQUIRED

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