this section you'll find answers to many of our most frequently asked
questions. Hopefully you will quickly find the information you need. If,
however, your particular question is not answered below, please don't
hesitate to call us at 864-476-6330 or send us an email. You'll receive
a prompt response to your inquiry.
What are your engineering capabilities? We have a full
design engineering staff and test facility. Our engineers have over
80 years design and application experience in the electrical switchgear,
circuit breaker and transformer components and apparatus.
you have this product in stock? Our porcelain insulators are
in stock, but the balance of our product is made to order. Lead times
vary depending on the processes used to manufacture each type of part.
General lead times are as follows:
~ Porcelain insulators: generally in stock
~ PolyKeram insulators: 2-4 weeks
~ Porcelain bus and switchgear insulators: 4 weeks
~ Current transformers: 3-4 weeks
~ Disconnect bushings: 4-6 weeks
~ Silicone-rubber shed apparatus bushings: 8-10 weeks
you expedite? Urgent requests for expedited parts are always
welcome and the PBI staff will promptly research all requests based
on current material and production availability.
you reverse engineer an old CT in need of replacement? We can
duplicate any 600 voltage class CT once we determine the physical, metering
and relaying requirements.
you refurbish GE, ABB, Westinghouse or other obsolete lifter or stab
type bushings currently in the field? We can generally utilize
the existing conductor and refurbish bushings utilizing our duresca
process at a price favorable to replacement.
you provide replacement apparatus bushings for breakers in the field?
Our silicone-rubber shed capacitive-graded core bushing is the preferred
replacement apparatus bushing by our current utility customers. We are
happy to quote replacements fro a wide range of GE and Westinghouse
bushing no longer available.
what voltage classes are your silicone-shed CRC bushings available?
We currently offer 15KV-69KV voltage classes.
is Polykeram? Polykeram is an electrical-grade material developed
through the Electric Power Research Institute in the late 1970ís to
address the concerns of porcelain: weight, cost, fragility and long
lead time. The result was an electrical grade polymer concrete. The
Polykeram formulation consists of a proprietary UV-resistant polyester
resin filled with a high level of finely-graded silica.
Polykeram insulators an acceptable substitute for porcelain?
Absolutely! The material was originally designed as a porcelain replacement
for a variety of applications including outdoor post-type insulators,
B-type stand-off insulators, through-wall bus supports and non-standard