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 200 Watts to 750 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

PHD200

200

4000 3000 1800   1100 660 500 400 300 250   0.45 872

PHD300

300

6000 4500 2700   1650 990 750 600 450 375   0.67 1294

PHD400

400

8000 6000 3600   2200 1320 1000 800 600 500   0.90 1700

PHD450

450

9000

6700

4000  

2500

1500

1130

900

690

570  

1.06

2100

PHD600

600

12300

9200

5500  

3200

1930

1460

1170

880

740  

1.35

2600

PHD750

750

14700

11000

6600  

4000

2420

1830

1460

1100

920  

1.60

3100

 

 

Operating

Once Per Hour

 

 Operating Time in any 15 Minute Period

 

With Tapping

 Band

 
   
 PHD Open Wound Heavy Duty Resistors - Dimensions (mm)

TYPE

WATTS

A

B

C

D

E

F

G

H

J

K

L

PHD200

200

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

PHD300

300

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

PHD400

400

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

PHD450

450

305

44

29

43

9.5

5

343

325

44

51

7 x 14

PHD600

600

305

54

38

50

9.5

5

356

333

54

76

7 x 17

PHD750

750

356

54

38

50

9.5

5

406

384

54

76

7 x 17
 
   
 

Prefix

PHD:

Heavy Duty Open Wound

 

 

 
   
   
 
 
 
 
                 

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