Thermal Cut-outs

Cut-outs can be fitted to certain resistors which will operate a contact to disconnect the resistor to prevent overload damage.

 

Resistance

The minimum and maximum values shown below are those available within a range of standard resistance alloys. You may select any Ohmic Value between the Min and Max Values.

 

Enclosed Resistors

Resistors are available supplied within a Heavy Duty Enclosure. See the Enclosure Data Section

 

Power Ratings

Standard continuous ratings are from 250 Watts to 1000 Watts. For pulse ratings, refer to the table below.

 
 Ohmic Values & Ratings - Continuous, Short Time & Intermittent
TYPE CONT SHORT TIME (SECONDS)   INTERMITTENT TIME (MINUTES)   OHMIC VALUES
    5 10 20   1/2 1 2 3 4 5   MIN MAX
 

WATTS

WATTS

WATTS

WATTS

 

WATTS

WATTS

WATTS

WATTS

WATTS

WATTS

 

OHMS

OHMS

PT200H

250

5000 3750 2250   1375 825 625 500 375 310   0.6 25

PT300H

400

8000 6000 3600   2200 1320 1000 800 600 500   0.6 30

PT400H

525

10500 7875 4700   2900 1730 1310 1050 785 655   1.0 30

PT450H

600

12000

9000

5400  

3300

1980

1500

1200

900

750  

1.5

40

PT600H

800

16000

12000

7200  

4400

2640

2000

1800

1200

1000  

3.0

60

PT750H

1000

20000

15000

9000  

5500

3300

2500

2000

1500

1250  

3.5

100

 

 

Operating

Once Per Hour

 

 Operating Time in any 15 Minute Period

 

 

 
   
 PT Heavy Duty Tape Wound Resistors - Dimensions (mm)

TYPE

WATTS

A

B

C

D

E

F

G

H

J

K

L

PT200H

250

152 44 29 43 9.5 5 190 173 44 51 7 x 14

PT300H

400

203 44 29 43 9.5 5 241 223 44 51 7 x 14

PT400H

525

254 44 29 43 9.5 5 292 274 44 51 7 x 14

PT450H

600

305

44

29

43

9.5

5

343

325

44

51

7 x 14

PT600H

800

305

54

38

50

9.5

5

356

333

54

76

7 x 17

PT750H

1000

356

54

38

50

9.5

5

406

384

54

76

7 x 17
 
   
 

Prefix

PT:

Heavy Duty Tape Wound

Suffix

H:

Horizontal Mounting
   
   
 
 
 
 
                 

Copyright HVR Pentagon Ltd 2014. All Rights Reserved. This page last updated: 6 March, 2014.