Pad mounted transformer

•Liquid-filled three phase pad-mounted transformers are an excellent choice for any
commercial or industrial underground distribution system.
•Provide safe, reliable power output in public space.
•Sealed tank construction
•Pad mounted transformer use FR3 high-fire-point dielectric fluid, environmental friendly choice
•Reliability: The rugged nature and design of pad-mounted transformers allows them to perform flawlessly in harsh weather conditions.
•special type design that is to be easy transpotation and installation.
•Excellent cooling effect by corrugate cooling way and external appearance is beautiful.
•Safety: The enclosed and durable design of pad-mounted transformers provides the highest level of protection against electric shock and arc flash hazards.

Main Specification
Transformer Type	oil immersed
Rated capacity	up to 20000kva
Rated voltage	up to 36kV
Frequency	50/60Hz
Phase	single phase or three phase
HV Bushing	Dead front or loop feed designs
LV Bushing	Epoxy resin , procelain bushing, type C
Winding material	Copper /Aluminum
Insulation class	A（105℃）， E (120℃）, B（130℃）
Oil	Mineral oil , FR3, MIDEL 7131
Vector group	Dyn11, Dyn5
Cooling	ONAN/ ONAF
Tap changer	on load or off load
Standard	IEC, AS, EN, IEEE/ANSI, GOST
Application	apartment buildings, schools, hospitals, shopping centers, solar farm and industrial sites.

pad mounted transformer for industry three phase pad mounted transformer

oil immersed pad mounted transformer

Routine test

Measurement of winding resistance
Measurement of voltage ratio and check of phase displacement
Measurement of short-circuit impedance and loss
Measurement of no-load loss and current
Dielectric routine tests
Tests on on-load tap-changers, where appropriate
Leak testing with pressure for liquid-immersed transformers(tightness test)
Tightness tests and pressure tests for tanks for gas-filled transformers
Check of the ratio and polarity of built-in current transformers
Check of core and frame insulation for liquid immersed transformers with core or frame insulation

Type test

Temperature-rise type test
Dielectric type tests
Determination of sound level for each method of cooling for which a guaranteed sound level is specified
Measurement of the power taken by the fan and liquid pump motors
Measurement of no-load loss and current at 90% and 110% of rated voltage

Special test

Dielectric special tests
Winding hot-spot temperature-rise measurement
Determination of capacitances windings-to-earth, and between windings
Measurement of dissipation factor(tanδ) of the insulation system capacitances
Determination of transient voltage transfer characteristics
Measurement of zero-sequence impedance(s) on three-phase transformers
Short-circuit withstand test
Measurement of d.c. insulation resistance each winding to earth and between windings
Vacuum deflection test on liquid immersed transformers
Pressure deflection test on liquid immersed transformers
Vacuum tightness test on site on liquid immersed transformers

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Oil Immersed Transformers