|
 _R_AM Series of rheostats are
useful for colleges, industries and laboratories.
Rheostats are used as adjustable resistors in electrical circuits. With 3
terminals provision, rheostats are also useful to vary a DC voltage
smoothly from 0 to maximum value.
_R_AM Series of rheostats
consist of a resistance wire wound on a non- magnetic and non-inductive
metal core. The core is fitted between 2 aluminium
end supports.
The contact block slides on a highly polished bright chrome plated square
guide rod. Multiple brushes of phosphor bronze rolled strip give springy
action to the contacts and hold brush firmly in contact with the
resistance wire. The contact block can be slided
smoothly with the help of a bakelite knob fitted with the contact block.
Two terminals of bright chrome plated brass nuts and screws, one at each
end of the core and the third terminal at both ends of the guide rod,
have been provided for easy connections. All electrical hardware is
bright chrome plated of brass. |
|
Resistance Value and
Current Capacity
|
Model
No.
|
Diameter
(mm)
|
Rate
(Rs.)
|
|
.3 ohms, 20 amps
|
.3R20AM
|
152x35
|
700/-
|
|
5 ohm, 15 amps
.6 ohms, 15 amps
|
5R15AM
.6R15AM
|
455x76
305x35
|
2500/-
700/-
|
|
20
ohms, 10 amps
10
ohms, 10 amps
4
ohms, 10 amps
1.25
ohms, 10 amps
|
20R10AM
10R10AM
4R10AM
1.25R10AM
|
560x90
467x76
305x50
152x35
|
4000/-
2500/-
1500/-
700/-
|
|
100
ohms, 5 amps
60
ohms, 5 amps
12
ohms, 5 amps |
100R5AM
60R5AM
12R5AM
|
560x100
455x90
305x35
|
4000/-
2500/-
900/-
|
|
500
ohms, 2 amps
200
ohms, 2 amps
45
ohms, 2 amps
|
500R2AM
200R2AM
45R2AM
|
560x90
380x76
228x35
|
4000/-
2500/-
700/-
|
|
2.5K
ohms, 1 amp
1K
ohm, 1 amp
600
ohms, 1 amp
300
ohms, 1 amp
|
2.5K1AM
1K1AM
600R1AM
300R1AM
|
560x100
407x76
360x50
305x35
|
4000/-
2500/-
1500/-
900/-
|
|
25K
ohms, .3 amp
4.5K
ohms, .3 amp
2K
ohms, .3 amp
|
25K.3AM
4.5K.3AM
2K.3AM
|
560x100
305x50
228x35
|
5000/-
1500/-
900/-
|
|
|
CURRENT
CAPACITY
RESISTANCE VALUES
TOLERANCE OF RESISTANCE
TEMPERATURE RISE
HIGH VOLTAGE BREAKDOWN
MAXIMUM WORKING VOLTAGE
AMBIENT TEMPERATURE
|
 Available in
current capacity of 1, 2, 5 and 10 amperes.
2K, 4.5K and 25K ohms for 0.3 amps capacity.
300, 600, 1K and 2.5K ohms for 1 amp current capacity.
45, 200 and 500 ohms for 2 amps current capacity.
12, 60 and 100 ohms for 5 amps current capacity.
1.25, 4, 10 and 20 ohms for 10 amps current capacity.
0.6 and 5 ohms for 15 amps current capacity.
0.3 ohms for 20 amps current capacity.
±
5% of value.
200°C above ambient temperature.
Better than 2KV AC for 1 minute between end support and any 1 of the 3
terminals.
Multiple of current capacity and resistance value, or 500 volts,
whichever is lesser.
0 to 45°c.
|
|
