Three-Phase Pad-Mount Transformer
Document:
Three-Phase Pad-Mount Transformer Brochure
Three-Phase Pad-Mounted Transformer Features
The Liquid-Filled Loop Feed Pad Mounted Transformer is an oil-filledthree-phase, commercial pad mounted distribution transformer specifically designed for servicing such underground distribution loads as shopping centers, schools, institutions and industrial plants. lt is available in both live front and dead front construction, for loop feed applications. with or without taps. The transformer uses aluminum or copper winding and is optimized to maximize efficiency and footprint. lt has many advantages: such as high voltage, no drifting of neutral point, low loss small volume, cost-effective, safety and environment protection. attractive appearance and etc.
Our Liquid-Filled Loop Feed Pad Mounted Transformer is designed andtested in accordance with industry standards (including CSA, ANSI C.57.DOE, and IEEE) as applicable.
A wide range of features and accessories is available to satisfy almost any special requirement, including fuses, surge arresters, gauges, controls, cooling fans, pressure relief devices, load-break switches, and high-voltage tap switches. In addition to the standard mineral oil, alternate insulation fluids, such as silicone and seed-based vegetable oil are available for special applications.
Standard Features and accessories
• Meets or exceeds current IEEE, NEMA, and RUS standards as applicable .
• Full compliance with IEEE C57.12.28 enclosure integrity standards.
• Externally clamped universal high-voltage bushing wells for dead- front applications (three for radial feed operation or six for loop feed operation)
• HVconnection:Live front-external clamoed and removable HV bushing with eyebolt,clamp type connector
• Externally clamped low-voltage bushings with threaded stud for full-load current through 1400 Amps, or externally clamped one-piece NEMA spade bushings for full-load current above 1400 Amps.
• Removable high-voltage /low-voltage neutral link, internally mounted and accessible through tamper-resistant hand hole
• Lifting provisions
• Removable terminal compartment and bottom sill, and removable doors with stainless steel hinges
• Removable hood with stainless steel hinges, and removable sill with stainless steel fasteners
• Three-point door latching system with recessed interlocking pentahead security bolt, and padlock provision.
• Recessed hood latching system with captive pentahead security bolt, floating nut, and interlocking padlock provision.
• Tank ground provisions
• Mild steel high-voltage /low-voltage compart-ment barrier
• Domed top surfaces on tank and terminal compartment to prevent water retention
• Recessed tank compart-ment bottom
• Oil fill/ oil level plug
• Oil drain plug for 500 KVA and below.
• Automatic pressure relief device mounted in terminal compartment.
• Oil drain valve with sampling device on 750 kVA and above
• Electrical grade mineral oil insulation fluid with oxidation inhibitor
• Laser engraved anodized aluminum nameplate
• Five-legged core/coil assembly.
• Self-acluating pressure relief valve.
Optional Features, Accessories and Design Standards
• Loadbreak high-voltage bushing inserts or externally clamped integral (one piece) high-voltage bushings for dead-front applications.
• Externally-clamped porcelain high-voltage bushings with eyebolt connectors for live-front applications .
• Low-voltage connectors, including various screw-on or slip-on types
• Lightning arrester mounting provisions .
• Externally operable non-loadbreak high-voltage tap switch with one of the following tap ranges: four 2.5%taps above normal; or four 2.5% taps below normal; or two 2.5% taps above and two 2.5%taps below normal; or taps at
13800/13200/12870/ 12540 for transformers with a nominal high-voltage rating of 14400 (may not be available in combination with dual high-voltage switch)
• Externally operable dual high-voltage switch (may not be available in combination with high-voltage tap switch)
• Externally operable two-position or four-position high-voltage loadbreak switch
• Secondary termination:Externally clamped bushings with NEMA 4-hole, 6-hole, 8-hole, 10-hole or12-hole spades Spade supports are available. They are provided for 8-hole spades and larger
• Draw-out full-range current limiting fuses in dry-well canisters; with or without interlocking loadbreak switch .
• Arc Strangle* fused disconnect
• Under-oil, elbow, or panel-mounted types (panel-mounted types are available on compartmental live-front units only)
• Drip shields for use with draw-out expulsion fuse
• High capacity pressure relief device mounted on tank cover
• Drain valve with sampling device
• Total stainless steel or hybrid (mild steel/stainless steel construction).
• 30" or 34" or 40M deep cabinet
• CT or PT, including mounting support
• External Watt-hour meter base with or without meter, or mounting provisions only( Compartmental style, live-front construction only)
• Windshield:
Transformers may feature an optional Windshield over the cabinet which ishinged to allow clearance for replacement of the bayonet-type fuses.
The Windshield can be lifted easily into place and secured with a singlesupporting arm.
The Windshield requires no additional holddown hardware.
• External/internal potential transformers
• External/internal current transfonners
• Tank ground connectors
• Dial type temperature gauge
• Dial type liquid level gauge
• Dial type pressure/vacuum gauge
• Welded cover with hand hole
• Seed-based insulation fluid
• Laser engraved stainless steel nameplate (aluminum standard)
• Custom stenciling or labeling
• NEMA safety labels
(Note: Contact your distributor or factory representative for availability of other kVA sizes, voltage ratings, features, accessories and design standards not listed.)
*Arc Strangle,. is a registered trademark of Cooper Power Systems.
Standard kVA and Voltage Ratings
Dead-Front Compartmental Style
kVA Ratings (65°C Rise, ONAN)
45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500,2000,2500,3000,3750,5000, 7000, 7500, 10000
High-Voltage Ratings (Delta or Wye)
2400 through 34500 (through 250 kV BIL)
Low-Voltage Ratings (Delta or Wye)
120 through 8600 or 14400Y (through 95 kV BIL)
Live-Front Compartmental Style
kVA Ratings (65°C Rise, ONAN)
45, 75, 112.5, 150, 225, 300, 500, 750, 1000, 1500, 2000, 2500, 3000, 3750,5000, 7000, 7500, 10000
High-Voltage Ratings (Delta or Wye)
2400 through 34500 (through 250 kV BIL)
Low-Voltage Ratings (Delta or Wye)
120 through 8600 or 14400Y (through 95 kV BIL)
(Note: Certain combinations of kVA, high-voltage, and low-voltage ratings may not be available. Contact your distributor for availability of other kVA sizes.voltage ratings, features, accessories, and design standards not listed.)
Table: Liquid-filled loop Pad-Mounted Transformers
|
KVA |
HV(V） |
LV（V） |
Loss（w） |
Dimension（mm\in） |
Weight（KG） |
||||
|
No-load loss （W） |
On-load loss （W） |
H (mm/in) |
W (mm/in） |
D (mm/in) |
Oil weight |
Total weight |
|||
|
75 |
34500/ 19920 13800/ 7957 13200/ 7620 12470/ 7200 or others |
240
480
480Y/
277
600Y
347 |
180 |
1250 |
1430/56.30 |
1390/54.72 |
910/35.82 |
120 |
645 |
|
112.5 |
200 |
1500 |
1430/56.30 |
1420/55.91 |
920/36.22 |
138 |
729 |
||
|
150 |
280 |
2200 |
1530/60.24 |
1510/59.45 |
980/38.58 |
201 |
989 |
||
|
225 |
400 |
3050 |
1660/65.35 |
1600/62.99 |
1000/39.37 |
230 |
1195 |
||
|
300 |
480 |
3650 |
1680/66.14 |
1660/62.99 |
1080/42.52 |
260 |
1415 |
||
|
500 |
680 |
5100 |
1790/70.47 |
1810/71.26 |
1160/45.67 |
325 |
1905 |
||
|
750 |
980 |
7500 |
2030/79.92 |
2030/79.92 |
1300/51.18 |
535 |
2755 |
||
|
1000 |
1150 |
10300 |
1854/72.99 |
1651/65 |
1549/60.98 |
650 |
3235 |
||
|
1500 |
1640 |
14500 |
2150/84.65 |
2210/87.01 |
1470/57.87 |
748 |
5835 |
||
|
2000 |
2160 |
20645 |
2220/87.40 |
2380/93.70 |
1600/62.99 |
950 |
6430 |
||
|
2500 |
2680 |
27786 |
2330/91.73 |
2480/97.64 |
1650/64.96 |
1020 |
8865 |
||
Note: 1. The above data is only based on our design, special requirements can be customized
3 . Height, width and depth do not include radiators.
