- REPAIR - FABRICATION - DESIGN - MODIFICATION
AND CLAMPING MODULES
are much smaller, by comparison to conventional electrode holders
and incorporate primarily the electrode contact area. While electrodes
are clamped into position in electrode holders by a clamping block
pushing forward into the electrode contact surface, they are clamped
in contact pad assemblies by being pulled back into the pad with
the mechanical support of the steel housing equipment.
Contact pads reduce the amount
of copper-electrode contact area and thus are less forgiving
than conventional electrode heads. It is therefore vital
to keep closer tolerances on machined surfaces and maintain
proper clamping force.
Like electrode holders, contact
pads are used in many diverse design applications. Although many
styles and configurations work well, we strongly recommend the pads
be manufactured from either copper forgings with drilled-in cooling
ports or from copper castings with cast-in monel cooling coils.
Contact pads realize the same type
of operating damage as do electrode heads. Likewise they are repairable
at a fraction of replacement costs. In addition to water leaks and
contact surface arcing you are likely to experience some bowing
(top-to-bottom) with contact pads.
Clamping Modules are fabricated
steel weldments. Designs vary however in the illustration
to the left, the front end is mobile. It is water-cooled
and has an electrode plate which is insulated from the
The back end contains the hydraulic
clamping mechanism and has slide plates to guide the movable clamp
band as well as to hold the contact pad in its proper location.
Periodic inspection of the clamping system is necessary to insure
proper clamping pressure and electrode release capability. Slide
plates tend to wear down after lengthy service and should be repaired
Our mechanical and electrical perception
of your current-carrying equipment coupled with a seasoned staff,
utilizing field-proven manufacturing and repair processes means
you proceed with confidence with ERIE products and
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