1) Core Porcelain Tube, Non-Magnetic Non-Inductive Tubular Type.
Diameter and Length of
core is given in the table below.
2) Contact
Block : Squire
piece made of material is fitted with contact sliders in the
guide
squir rod. Bright chrome plated Phosphor bronze strip
which makes immediated contact
with the guide rod. A backlite
knob is fitted with squire piece for sliding up and down.
3) Guide
Rod : Solid
draven brass rod bright chrome plated squire.
4) Contact
Material : Multiple
brushes of Phosphors bronze strip rolled strip give springy
action
to the contacts.
Winding Wires
: Eureka wire
for low value and nichrom wire 80/20 grade for higher values.
Temperature
rise : 200oC
above ambient temperature
High Voltage
Test : 2 KV A.C. for 1 minute between end support and any one of
3 wires terminals of the wire.
End supports :
Aluminium brackets painted.
Terminals :
Bright Chrome plated brass nuts and screws one at each end of
Leaneer Type Wire-Wound Resistor and the third one at both the
side of guide rod.
All Electrical Connectors are made from chrome plated brass
material.
Rotary Sliding
Rheostate, Double tube and Multiple Tubes, Non-Standard values,
wattage on specific request, Available from 100 Ma to 100 Amps
0.3 ohms to 25 Kohms.
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