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105

PFE and PFR Series

Powr-Rib® Edgewound

Edgewound and Round Wire

Current Rating Continuous duty as listed on follow-

ing page.

Wattage Rating 700 to 1,000 (up to 1,600 watts on

special order)

Resistance

Tolerance

±10% standard, ±5% available

Terminals Clamps, movable along resistor

wire for setting intermediate resis-

tance values on Edgewound units

(current must be derated in propor-

tion).

Temperature

Coefficient

±300 ppm/°C for resistors 50 amps

and more; ±500 ppm/°C for resis-

tors 47 amps or less

Ohmic Values See chart on following page

Mounting Metal mounting bar is slotted on

each end to facilitate installation.

Short Term

Overload

10x rated wattage for five seconds

100

Ambient Temperature, °C

60

20

0

80

40

25

50

150

350

100

0

200 250 300

Designed in both Edgewound and Round

Wire formats, these rugged resistors can

handle 700 to 1000 Watts of power.

Specify our Edgewound design for

very low resistance and high power

capacity. When higher resistance with lower power

capacity is required use our Round Wire design.

These resistors are constructed of a heavy resistance alloy mounted on

ceramic insulators and supported by a metal mounting bracket. Metal parts,

except for the resistance element, are heavily plated to prevent oxidation at high

operating temperatures and to prevent corrosion. The mounting bar is slotted

on each end to facilitate installation. Edgewound units provide clamp-type ter-

minals, permitting a reliable connection which can be moved along the resistive

element to obtain intermediate values.

cha R act ER i S tic S

Derating

Size* (No. of

Insulator-Sections Long)

2

3

4

5 (std.)

6

7

8

Dimension A

in.

8.875

11.875 14.875 17.875 20.875 23.875 26.875

mm

(225.43) (301.63) (377.83) (454.03) (530.23) (606.43) (682.63)

Dimension B

in.

7.250

10.250 13.250 16.250 19.250 22.250 25.250

mm

(184.15) (260.35) (336.55) (412.75) (488.95) (565.15) (641.35)

Max. Amps Ohms

Ohms

Ohms

Ohms

Ohms

Ohms

Ohms

PFE Edgewound

100

0.033

0.057

0.080

0.100

0.120

0.140

0.160

91

0.040

0.070

0.100

0.120

0.140

0.160

0.180

89

0.046

0.078

0.110

0.140

0.170

0.200

0.230

78

0.052

0.088

0.120

0.160

0.190

0.220

0.250

75

0.060

0.100

0.140

0.180

0.210

0.250

0.300

68

0.070

0.120

0.180

0.220

0.260

0.300

0.340

63

0.080

0.130

0.190

0.250

0.300

0.350

0.400

57

0.100

0.160

0.230

0.300

0.360

0.420

0.480

54

0.110

0.180

0.250

0.330

0.400

0.470

0.540

50

0.120

0.200

0.280

0.370

0.450

0.530

0.610

47

0.170

0.280

0.380

0.500

0.600

0.700

0.800

43

0.210

0.330

0.460

0.600

0.720

0.850

0.980

41

0.230

0.360

0.510

0.670

0.800

0.930

1.06

39

0.260

0.420

0.580

0.750

0.900

1.05

1.20

33

0.350

0.560

0.770

1.00

1.20

1.40

1.60

29

0.450

0.730

1.00

1.30

1.50

1.75

2.00

26

0.560

0.900

1.20

1.60

1.90

2.20

2.50

18.4

0.690

1.20

1.70

2.20

2.70

3.10

3.50

16.3

0.880

1.50

2.20

2.80

3.40

4.00

4.60

14.6

1.10

1.90

2.70

3.50

4.30

5.10

5.90

12.7

1.40

2.40

3.50

4.50

5.50

6.50

7.50

11.8

1.70

2.90

4.20

5.40

6.60

7.80

9.00

10.3

2.10

3.70

5.30

6.80

8.30

9.80

11.3

9.4

2.70

4.60

6.50

8.50

10.40

12.3

14.2

PFR Round-Wire

8.3

3.4

5.9

8.5

11.0

13.5

16.0

18.5

7.6

4.1

7.1

10.0

13.0

15.9

18.8

21.7

6.6

5.3

9.2

13.0

17.0

20.8

24.6

28.4

5.9

6.3

10.9

15.4

20.0

24.5

29.0

33.5

5.1

7.9

13.6

19.3

25.0

30.7

36.4

42.1

*Standard 5-section units are stocked; part numbers are listed on the following page.

(continued)