Connectewll terminal blocks are made of carefully selected
materials, insulating materials, clamping and conducting metals
which are subjected to strict quality control as demanded by
stringest international standards.
One of the most important parts of the terminal block is the
screw. Quality of the connection depends mainly on quality of the
screw. The screw must not get damaged, should withstand a
higher torque than that stipulated in specification. The screw
should not even at the highest stress, weld with the metal of the
Connectwell terminal block employ cold forged rolled threaded
steel screws. In cold forged rolled threaded screw, material is
compressed and therefore strengthened. Whereas in turned screw,
material is removed between the threads when it is cut. Because of
this and the stress concentration on the neck of the screw, the
turned screw is considerably weaker in strength.
The screws are zinc plated and chromate passivated for good
Clamping yokes in carefully selected grade of steel ensure high
torque performance necessary for gas tight connection. The clamping
components (both screws and yokes) are electroplated
with zinc and passivated by additional golden yellow chromate
coat. Zinc provides cathodic protection to steel. Therefore the
effect of protection against corrosion is still retained even when
plating is partially damaged by scratches or pores.
The clamping components of some of Connectwell terminal blocks
are made of copper alloys. Such components are electroplated with
either nickel or tin to ensure oxidation free performance
Current Carrying / Conducting
The current carrying / conducting components / current bars are
made of electrolytic grade copper or copper alloy to ensure very
low contact resistance. The components are electroplated with tin /
nickel / tin-lead to provide oxidation free contact.