Substation Power Transformers - Pad Mounted Transformers

ANSI, NEMA, IEEE, Pad Mounted Transformers, Substation Power Transformers

Three-phase pad-mounted transformer is designed to protect environmental hazards.

All transformers are developed and produced especially to satisfy exacting customer’s exact specification.

The latest applicable standards (ANSI, NEMA, IEEE) have been applied to all of Pad-mounted transformers.

Three-phase pad-mounted transformers are available in live-front or dead-front designs.

Both radial and loop feed configurations are built based on ANSI standards.

The dead-front bushing configurations are in accordance with ANSI C57.12.26, livefront per ANSI C57.12.22.

This establish to underground supply of electric power system burying processing distribution line in land as suitable transformer at beauty of city environment.

The quality of corrugated style radiator is superior to panel style radiator which is mainly used in existing.

Dowei Electric proven design offers excellent mechanical strength that has been proven through years of service and special testing.

We are constantly trying our best to introduce innovative product to the transformer industry, bringing you the high quality transformer with competitive cost.

Standard characteristics

●65 average winding rise

●Unique step-stacked core and rectangular wound core

●60Hz standard, optional 50Hz

●Mineral oil, optional FR3

●Operating Voltages for 300kVA through 1500kVA rating: High Voltages(HV):

-4160Grd Y/2400 V through 34500 Grd Y/19920 V

-2400 through 34500 V Delta

-Various Dual high voltages

High Voltage taps:

-All Voltages are available with 5 or 7 step taps

-Dual Voltage taps provided only on the higher voltage

Low Voltage (LV):

-208Y/120 V, 480Y/277 V, 480 V , 240V , and 240 V , with 120 V mid-tap in one phase

-4160Y/2400 V, 4160 V , 2400 V ,

Primary insulation classes : 35 kV, 200 kV BIL and below

●Operating voltages for 2000kVA through 7500kVA rating: High Voltages(HV):

-12470Grd Y/7200 V through 34500 Grd Y/19920 V

-4160 V through 34500 V Delta

-Various dual high voltages

Voltage taps:

-All voltages are available with 5 or 7 step taps

-Dual voltage taps provided only on the higher voltage Low Voltages (LV):

-480Y/277V, 480V , 240V

-4160Y/2400V, 4160V , 2400V

●Impedance guidelines:

300kVA-500kVA : 2.8-5.0% nominal

750kVA-2500kVA : 5.75% nominal

3000kVA-7500kVA : consult LSIS Transformers.

●Tank : Mild steel, optional stainless steel

● Bolted-on cabinet with removable sill having the following depths :

-19" deep for 300kVA through 750 kVA

-22" deep for 1000kVA through 1500kVA

-24" deep for 2000 kVA through 3750kVA

-30" deep for 5000 Kva through 7500kVA

●HV and LV compartment doors-hinged and lift-off type with 120˚ holding bars

●Stainless steel door hinges

●Steel HV/LV compartment barrier

●Padlocking facikity with one penta-head bolt on the LV compartment door and two penta-head bolts on the HV compartment door-including 3 point latching mechanism

●HV connection:

-Live front-external clamoed and removable HV bushings with eyebolt, clamp type connector

●LV connection:

-Externally clamped polymer & porcelain LV bushing with 4-12 Hole spades

●Nameplate per ANSI requirement

●Self-actuating pressure relief valve

●Oil fill plug

●1" drain valve eith sampler for 750 kVA and above

●Removable LV neutral ground strap; as required

●Xo/Ho for Y-Y connected transformers

●Cooling panels

●Durable, corrosion-resistance powder coat paint finished Munsell Green 7GY3.29/1.5 or ANSI#70 Gray 5.0BG7.0/0.4

●NEMA tank ground pads

●Four(4) lifting lugs

●Jacking bosses

●Provision for liquid level gauge

●Provision for liquid temperature gauge

●Provision for pressure vacuum gauge

●Provision for press relief valve