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_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.
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Resistance
Value and
Current Capacity
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Model
No.
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Dimensions
(mm)
(W)x(H)x(L)
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Rate
(Rs.)
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.3 ohms, 20 amps
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.3R20AM
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70x120x200
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700/-
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10 ohms, 15 amps
5 ohms, 15 amps
2 ohms, 15 amps
.6 ohms, 15 amps
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10R15AM
5R15AM
2R15AM
.6R15AM
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120x210x605
103x190x500
80x140x440
75x125x290
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4000/-
2500/-
1500/-
700/-
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20
ohms, 10 amps
10
ohms, 10 amps
4 ohms,
10 amps
1.25ohms,10amps
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20R10AM
10R10AM
4R10AM
1.25R10AM
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120x200x615
100x185x445
80x140x365
70x120x200
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4000/-
2500/-
1500/-
700/-
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100
ohms, 5 amps
12
ohms, 5 amps
5 ohms, 5 amps
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100R5AM
12R5AM
5R5AM
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122x205x615
75x115x365
70x120x295
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4000/-
900/-
700/-
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500
ohms, 2 amps
200
ohms, 2 amps
100
ohms, 2 amps
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500R2AM
200R2AM
100R2AM
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120x205x615
105x190x435
80x140x365
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4000/-
2500/-
1500/-
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2.5K
ohms, 1 amp
1K
ohm, 1 amp
600
ohms, 1 amp
300 ohms, 1 amp
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2.5K1AM
1K1AM
600R1AM
300R1AM
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120x210x650
105x190x435
80x140x425
70x120x365
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4000/-
2500/-
1500/-
900/-
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25K
ohms, .3 amp
4.5K
ohms, .3 amp
2K
ohms, .3 amp
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25K.3AM
4.5K.3AM
2K.3AM
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120x210x650
80x140x365
70x120x280
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5000/-
1500/-
900/-
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CURRENT CAPACITY - Available in
current capacity of 0.3, 1, 2, 5, 10, 15 and 20 amperes.
RESISTANCE VALUES - 2K,
4.5K and 25K ohms for 0.3 amps capacity.
300, 600, 1K and 2.5K ohms for 1 amp current capacity.
100, 200 and 500 ohms for 2
amps current capacity.
5, 12 and 100 ohms for 5 amps current capacity.
1.25, 4, 10 and 20 ohms for 10 amps current capacity.
0.6, 2, 5 and 10 ohms
for 15 amps current capacity.
0.3 ohms for 20 amps current capacity.
TOLERANCE OF RESISTANCE - ±5%
of value.
TEMPERATURE RISE - 200°C
above ambient temperature.
HIGH VOLTAGE BREAKDOWN - Better
than 2KV AC for 1 minute between end support and any 1 of the 3
terminals.
MAXIMUM WORKING VOLTAGE - Multiple
of current capacity and resistance value, or 500 volts, whichever is
lesser.
AMBIENT TEMPERATURE - 0
to 45°c.
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