Huanghua Group Co., Ltd. 
Single Phase Oil Immersed Distribution Transformer
Product Overview
CNHK produces the Single Phase, oil immersed Smalldistribution transformers which are pole mounting. They aresuitable for serving residential overhead distribution typeload, as well as for commercial, Industrial, lighting systemand diversified power applications. These transformers aredesigned for the duties normally encountered on electricutility power distribution systems.
Type Designation
Standard Features
All units are built in accordance with both ANS/ C5712.00 and ANS/ C5712.20,except as modified to comply with customer specifications.
Mild steel tank with welded lifting lugs and hanger brackets for direct to pole mounting.
Single piece clamped cover band meets cover retentionrequirements of ANSI standards. Electrostatic-ally appliedpolyester powder paint system for superior corrosionprotection.
Drain and sampling valveConnections for groundings.
HV porcelain cover mounted bushings Tank wall mounted
porcelain or polymer low voltage bushings.
Tin-plated bronze terminals for connection to copper or aluminum.
Insulated cover for wildlife protection.
Stainless steel nameplate.
Non-PCB insulating oil.KVA rating on tank wall.
Low voltage ground provisions.
Tank ground provisions Arrester mounting nuts weldedto tank One HV bushings with tank ground strap forgrounded wye applications or two HV bushings for wyeapplication Recessed tank bottom
Optional Features
Dual High voltage ratings External tank mounted high voltage lighting arrester.
Stainless steel tank,cover,clamping band.
Variety of features available for wildlife protections.
About D11 Series Technical Parameters
| Rated Power (kVA) | H.V (V) | Tap changer | L.V (V) | Vector Group | No‑load loss (W) | load loss (75℃)(W) | Impedance voltage(%) |
|---|---|---|---|---|---|---|---|
| 3 | 34500 19920 13800 13200 7600 12470 7200 or others |
±2×2.5% or ±5% | 110/220 120/240 240/480 250/500 or others |
Ii0 | 12 | 45 | 3.5 |
| 5 | 25 | 75 | |||||
| 10 | 50 | 120 | |||||
| 15 | 65 | 195 | |||||
| 25 | 105 | 290 | |||||
| 37.5 | 140 | 360 | |||||
| 50 | 180 | 500 | |||||
| 75 | 250 | 650 | |||||
| 100 | 275 | 850 | |||||
| 167 | 455 | 1410 | |||||
| 250 | 650 | 2000 | |||||
| 333 | 845 | 2500 |
* Provide +5% or +2×2.5% tap changer
Outline Dimensional Drawing
About D11 Series Dimensions(Primary voltage:13.2KV)
| Model | Rated | Weight | Dimension A(mm) | Tank Type | |||||
| (kVA) | Oil | Total | A | B | C | D | E | ||
| D11‑3 | 3 | 20 | 105 | 760 | 430 | 530 | 330 | 286 | H |
| D11‑5 | 5 | 30 | 110 | 780 | 430 | 530 | 330 | 286 | H |
| D11‑10 | 10 | 35 | 130 | 830 | 430 | 530 | 330 | 286 | H |
| D11‑15 | 15 | 40 | 185 | 850 | 480 | 580 | 380 | 286 | H |
| D11‑25 | 25 | 45 | 210 | 880 | 500 | 580 | 410 | 286 | H |
| D11‑37.5 | 37.5 | 60 | 300 | 930 | 560 | 640 | 460 | 286 | H |
| D11‑50 | 50 | 70 | 335 | 980 | 560 | 640 | 460 | 286 | H |
| D11‑75 | 75 | 105 | 460 | 980 | 680 | 720 | 554 | 286 | H |
| D11‑100 | 100 | 125 | 530 | 1020 | 780 | 800 | 610 | 286 | H |
| D11‑167 | 167 | 155 | 670 | 1050 | 830 | 890 | 660 | 286 | H |
| D11‑250 | 250 | 240 | 950 | 1100 | 960 | 950 | 660 | 591 | H/R |
| D11‑333 | 333 | 250 | 1000 | 1150 | 960 | 960 | 660 | 591 | H/R |
* Tank Type: H: Hermetically sealed tank R: Hermetically sealed tank with Raditor