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SPECIAL TRANSFORMERS

Special Transformers
Single-Phase / Earthing / Pole-Mounted / Regulator

Non-standard voltage, phase count, mounting and environment — built to drawing or to the duty. Export systems available.

Short answer: Pengbian Electric builds single-phase transformers, pole-mounted round-tank units, earthing transformers, feeder regulators and PV step-up transformers to drawing — 10–35kV, custom projects typically 25–35 days.
Yueqing oil-immersed transformer S13 on the production line
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Yueqing HV/LV switchgear KYN28A assembly
01 / SPECIFICATIONS

Specifications

Standard range shown below; the technical agreement and factory test report take precedence.

ItemRange / Notes
RangeSingle-phase, pole-mounted round tank, earthing transformer, feeder regulator, PV step-up, mining / marine / high-altitude
Voltage class10kV / 20kV / 35kV; export 11 / 22 / 33kV, 13.8kV, 34.5kV
Capacity5 – 10000 kVA depending on type
Frequency50Hz / 60Hz
PhasesSingle-phase / three-phase
Voltage regulationOff-circuit tap changer / on-load tap changer / automatic feeder regulation
CoolingONAN / ONAF / AN (dry-type)
Special designHigh altitude (derating above 2000m), C4/C5 corrosion, humid, marine, mining enclosure
StandardsGB 1094 series / IEC 60076; per project technical agreement
DocumentsRoutine test report, nameplate and connection diagram; type test on request
02 / TYPES

Common custom directions

Single-phase transformer

10kV / 20kV single-phase for single-phase loads and overseas network systems.

Pole-mounted round tank

The American distribution form — exported to North America, Southeast Asia and Africa.

Earthing transformer

Neutral earthing with arc-suppression coil or low resistance; oil-immersed or dry-type.

Feeder voltage regulator

Three-phase or single-phase, automatic regulation for long feeder ends.

PV step-up transformer

Matched to string or central inverters; split-winding available.

Other non-standard

Mining, marine, high altitude, corrosion — assessed to drawing.

Custom projects fail on missing information. Give us five things — duty, voltage ratio, capacity, installation environment, and the standard or reference drawing — and we can tell you directly whether it is feasible, at what price and in how long.
03 / LEAD TIME

Lead time

TypeLead timeConditions
Custom build25–35 daysDrawing confirmed, special materials in stock
With type test35–50 daysThird-party test slot
Export package30–45 daysEnglish documents, crating, certification
04 / FAQ

Frequently asked questions

Can pole-mounted round-tank units be exported?
Yes — designed to ANSI/IEEE or customer standards with American bushings, arrester brackets, English nameplate and export crating.
How is earthing transformer capacity determined?
From system capacitive current and arc-suppression coil rating. They are normally supplied as a set; we calculate against your system parameters.
On-load tap changer versus feeder regulator?
An OLTC sits on the transformer and regulates its output voltage; a feeder regulator is connected in series on the line and regulates the voltage at the far end of a long feeder.
Can standard models be used at altitude or on the coast?
Not advisable. Above 2000m we derate and increase insulation distances; coastal sites need C4/C5 corrosion protection and stainless hardware.
What is the lead time for custom units?
25–35 days typically; 35–50 days where third-party type testing is required.

Send the parameters, price within 24 hours

Tel / WeChat +86 189 6972 3308　Email cnpengbian@126.com

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