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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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