Three Phase Heaters 208 thru 600 Volts AC

Three phase heaters are available in voltages from 208 to 600 Volts AC, for insertion into duct sizes ranging from 6” x 8” to 120” x 144”.

The following stages are available:

THREE PHASE THREE PHASE

KW@208V

Elements @ 208V

KW@240V

Elements @ 240V

KW@240V

Elements @ 240V

2.1-9.0

3 Star

2.1-9.8

3 Star

41-54

9 Delta

9.8-17.25

3 Delta

11-17.25

3 Delta

55-59.7

18 Star

18-34.5

6 Delta

18-19.6

6 Star

52 - 72

12 Delta

35-51.75

9 Delta

20-36

6 Delta

61 - 79.8

24 Star

52-69

12 Delta

37-39.6

9 Delta

 Contact Factory

            NOTE: KW's listed above are nominal for ease in determining the number of elements.

Regular No. of Elements 2 Staging Increments 3 Staging Increments 4 Staging Increments

3 Star

1/2,1/2

1/3,1/3,1/3

1/4,1/4,1/4,1/4

3 Delta

1/3,2/3
2/3,1/3
1/2,1/2

1/3,1/3,1/3

1/4,1/4,1/4,1/4

6 Star

1/2,1/2

1/2,1/4,1/4
1/4,1/4,1/2
1/3,1/3,1/3

1/4,1/4,1/4,1/4

6 Delta

1/2,1/2

1/3,1/3,1/3

1/3,1/3,1/6,1/6
1/4,1/4,1/4,1/4

9 Delta

1/3,2/3
1/2,1/2

1/3,1/3,1/3

1/3,2/9,2/9,2/9
1/4,1/4,1/4,1/4

12 Star

1/2,1/2

1/2,1/4,1/4,
1/4,1/4,1/2

1/4,1/4,1/4,1/4

12 Delta

1/2,1/2

1/2,1/4,1/4
1/4,1/4,1/2

1/4,1/4,1/4,1/4

18 Star

1/2,1/2

1/3,1/3,1/3

1/3,1/3,1/6,1/6

24 Star

1/2,1/2

1/2,1/4,1/4
1/4,1/4,1/2

1/4,1/4,1/4,1/4

 

THREE PHASE

KW@480-600V

Elements @ 480-600V

5 - 19.8

3 Star

21 - 36

3 Delta

37 - 39.6

6 Delta

41 - 72

6 Delta

73 - 79.8

12 Star

81 - 100

9 Delta

 

STAGING OF CONTACTOR CONTROLLED HEATERS

Regular No. of Elements 2 Staging Increments 3 Staging Increments 4 Staging Increments

3 Star

1/2,1/2

1/3,1/3,1/3

1/4,1/4,1/4,1/4

4

3 Delta

1/3,2/3
1/2,1/2

1/3,1/3,1/3

1/4,1/4,1/4,1/4

6 Star

1/2,1/2

1/3,1/3,1/3
1/2,1/4,1/4
1/4,1/4,1/2

1/4,1/4,1/4,1/4

6 Delta

1/2,1/2

1/3,1/3,1/3

1/3,1/3,1/6,1/6
1/4,1/4,1/4,1/4

9 Delta

1/3,2/3
1/2,1/2

1/3,1/3,1/3

1/3,2/9,2/9,2/9
1/4,1/4,1/4,1/4

12 Star

1/2,1/2

1/3,1/3,1/3

1/4,1/4,1/4,1/4

”The following guidelines are commonly used, but do not necessarily apply to all applications”.

Center – “Staging of contactor controlled heaters”