Benefits of Dry Vs. Liquid-Filled

WHY DRY?

(Benefits of Dry vs. Liquid-Filled)

COST

v  Non-flammable, no fire hazard therefore can be located close to the electrical load reducing the length of costly low voltage cabling which can cause voltage drops and increase losses.

v  Weigh less than equivalent power-rated liquid-filled transformers so installation costs are reduced.

v  Require no installation of drainage areas, concrete vaults or curbing.

v  Require minimum downtime for maintenance and inspection.

v  Easier replacement of core & coil in case of catastrophic event (e.g. lightning strike, high line transient)

v  Fewer gauges & controls required than liquid-filled, fewer chances of instrumentation failure.

SAFETY

v  No risk of oil leaks or ground/water contamination.

v  Ease of installation; they’re lighter and easier to install.

v  Ease of inspection and routine maintenance.

v  Inherently less risk of fire due to materials of construction.

OTHER BENEFITS

v  Shorter lead times – delivery in as little as six weeks from time of order.

v  Standard designs – customized terminal locations to match every major switchgear manufacturer in the U.S.

v  Underwriters Laboratories (UL) listed transformers up to 3,000 kVA and 15kV class.

v  Various types of coil sealing and construction for various types of environments and applications:

a)  VPI – for all applications, starting with standard power and distribution, to Rectifier Duty, Drive Isolation, Exciter Duty, Transit application.

b)  VPE – for atmospheres with higher moisture, particulate matter or industrial contaminants.

c)  Epoxy End Cap – for power transformer or reactor coil protection from harmful contaminants.

d)  Unidip – special VTC process for environments with medium levels of moisture or inorganic particles and gasses.

e)  UNICladâ - VTC’s premium encapsulated coil. For your best protection against chemical environments, salt spray, dust or dirt, and water migration.

f)  TENV – VTC’s Totally Enclosed Non-Ventilated transformers offer superior protection from corrosive or highly volatile environments.

v  All VTC dry type transformers are not affected by frequent load variation.

v  VTC dry type transformers have Very low Partial Discharge, hence long life.

¨  Note Bene: VTC’s encapsulated coil, UNICladâ, has had no failures due to cracking, which is a very common problem with Cast Coil Transformers.

VIRGINIA TRANSFORMER CORP

www.vatransformer.com