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Rheostat

Rheostat-Sliding Contact :

(ZES 221)

 

Comprising a layer of resistance wire wound on an insulating heat resistance
tube (Porcelin) which is supported by cast metal feet. A sliding contact and
three 4mm socket terminals are provided, one terminal being connected
to the sliding contact and the other two to the ends of the winding, enabling
the unit to tbe used as rheostat or potentiometer.

TYPE

MAX 

Max 

Tube dia mm 

Tube Length mm

(Amps)

(Ohms)

(a) 

6.5

4.4

43

200

(b)

5.0

11 

43 

300

(c)

4.2

12 

43

200

(d)

4.2

20 

43

300

(e)

3.3 

16

43

200

(f)

3.3

27 

43

300

(g)

2.3 56 43 300

(h)

1.6 50 43 150

(i)

1.6 100 43 250

(j)

0.8 160 43 150

(k)

0.8 240 43 200

(l)

0.3 1700 43 200

(m)

0.3 2850 43 300

(n)

1.0 365 56 300

Rheostat, Single Tube, Protected :

(ZES 222)

Variable up to 345 ohms at 1.2A rating for use as a series resistor or a potentiometer. Enclosed type, in metal case with windings on porcelain former 350 mm long x 56 mm dia. Three 4mm socket terminals and four mounting lugs tapped.

 
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