This is a selection of
questions that we at Redragon are often
asked
- Q. Can Redragon
systems remove Corrosive Sulfur and DBDS
from transformer oil?
A. Yes. The TORS
series of transformer oil regeneration
systems fully removes corrosive sulfur
including elemental sulfur. It is
important to realize that regenerating the
oil must be continued to the endpoint to
fully remove sulfur as it is one of the
last contaminants to be removed.
- Q. Why is there
sometimes such a big difference in prices
between different manufacturers of
degasifiers for the same flow rate?
A. Usually this
comes down to the vacuum pump package. It
is not uncommon for a vacuum pump package
to comprise as much as 25% - 30% the price
of a degasing system. The HVD series of
High Vacuum Degasifiers from Redragon
offers you a choice in vacuum packages.
The impact of this is typically reflected
in the number of passes required to
achieve the desired oil parameters. The
bigger the vacuum package the lower the
number of passes required to do the job
but the higher the capital cost of the
degasifier.
- Q. Why does Redragon
quote different BDV values for the same
system?
A. This is due to
the fact that there are several different
and acceptable testing methods in use
globally, e.g. ASTM, IEC, each will
produce a different value on the same oil
sample.
- Q. Can your systems be
used on transformers that are energized
and/or under load?
A. Yes, both the
TORS and HVD systems have the option to
work online using the optional TOLMS or
Transformer Oil Level Monitoring System.
This system also allows most other
manufacturers degasifiers to be converted
to an online system as the TOLMS can also
be supplied as a standalone system.
- Q. Does Redragon
provide onsite support?
A. Yes, we do. We
are able to train and assist your
equipment operators at your site, or your
client's site, on both offline and online
oil processing.
- Q. When referring to
SF6 gas compressors I see the terms
oil-lubricated, oil-free and oil-less.
What are the differences between these
variants?
A. Oil-lubricated
compressors have both the compressor
crankcase and the gas pumping chamber
lubricated by oil. Clearly this compressor
exposes the pumped SF6 gas to oil
contamination. Redragon does not use
oil-lubricated compressors. Oil-less
compressors have sealed bearings in the
crankcase and non-oil lubricated pumping
chambers. Oil-free compressors have oil
lubricated crankcases and non-oil
lubricated pumping chambers, isolated by
triple-seals from the crankcase,
preventing any oil contamination of the
SF6 gas being pumped. Redragon uses
oil-less and oil-free compressors for a
guaranteed contamination free gas.
- Q. Can Redragon
perform service work on other
manufacturers equipment?
A. Yes, in most
cases we can repair, service or upgrade
other manufacturers oil processing and
SF6 gas processing equipment.
- Q. Can
your SF6 systems cater to new EPA
requirements for weighing SF6?
A. Yes, all of the
Redragon SHX-series of gas processing
carts can be fitted with accurate
loadcells for precise control of gas
inventory.
- Q. When should I add a
Roots booster to my oil processing system?
A. A Roots booster
is not required for oil processing; it
should only be used when vacuuming a
transformer. There is a danger of
negatively impacting transformer oil
qualities by using too high a vacuum, too
high a temperature or a combination of the
two - the oil viscosity will increase with
the subsequent removal of light-ends,
reducing the oil's efficiency to cool the
transformer.
- Q. Does Redragon
provide transformer dryout systems?
A. Yes. We offer our
DOF-series. These small versions of high
vacuum degasifiers are designed to run
unattended for periods of weeks at a time.
They have a relatively low flow rate
compared to the transformer oil volume and
are optimised to not only reduce the core
mositure content but to degasify the
transformer, removing reactive oxygen from
inside the transformer environment and
slow down the aging process - something
non-vacuum systems cannot do.
- Q. Does Redragon only
sell equipment or does it offer rentals,
rent-to-own, and/or alternative payment
schemes?
A. Redragon
will work with you to ensure that you
get the quality Redragon system that you
want. We offer a range of financial
options.
- Q. Does Redragon
provide onsite service using its own
equipment?
A. Not currently.
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