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)
