K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — K-Factor Harmonic Mitigating Transformers (K-4, K-13, K-20) — XinHuan

Harmonic-Mitigating Power Solutions

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20)

XinHuan engineers high-performance K-factor cast resin dry-type transformers specifically designed to withstand severe non-linear harmonic loads (triplen harmonics, VFD motor drives, and solar inverters). Featuring 200% neutral sizing, copper electrostatic shields, and low-loss transposed windings compliant with IEEE C57.110, AS/NZS 60076, and IEC 60076-11.

Browse Models Fast Quote
K-4 / K-13 / K-20
harmonic rating
200% Neutral
busbar capacity
IEEE C57.110
standard reference
2-Hour
quote submittal

Product Range

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — 16 Models Available

Standard and custom capacities available for global utility, industrial, and commercial projects. View complete catalog →

Browse All 16 Models in Catalog

Technical Overview

Engineered for Australian Mining, Solar & Non-Linear Industrial Grids

Modern variable frequency drives (VFD), rectifiers, and solar PV inverters generate substantial harmonic currents that cause conventional transformers to overheat from stray eddy losses and overload the neutral conductor. XinHuan K-factor transformers are built to handle up to 100% non-linear load content without derating.

Each unit incorporates a heavy-duty 200% rated neutral busbar, continuous grounded electrostatic shielding between primary and secondary windings, and Class H insulation materials to ensure safe, reliable continuous operation in harsh industrial environments.

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — Key Specifications

  • Capacity Range

    50 kVA to 3150 kVA

  • K-Factor Ratings

    K-4 / K-13 / K-20 (Custom K-30 on request)

  • Primary Voltage

    11 kV, 22 kV, 33 kV, 415 V

  • Secondary Voltage

    415 V / 240 V Three-Phase 4-Wire (Dyn11)

  • Neutral Sizing

    200% Rated Neutral Busbar

  • Shielding

    Electrostatic Copper Shield between Primary and Secondary

  • Standards

    IEEE C57.110 / AS/NZS 60076 / IEC 60076-11 / UL 1561

IEC / IEEE Reference Data

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — Standard Capacity & Loss Parameters

Request Custom Datasheet
K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — Standard Capacity (kVA), No-Load Loss (P0), Load Loss (Pk), Impedance (Uk%), and Weight Specification Table
Rated Capacity Voltage Ratio (HV / LV) No-Load Loss (P0) Load Loss (Pk) Impedance (Uk%) No-Load Current (I0%) Approx. Total Weight
100 kVA (K-4) 415V / 415V 420 W 2,100 W 4.0% 200% Neutral 580 kg
250 kVA (K-4) 415V / 415V 850 W 3,850 W 4.5% 200% Neutral 1,050 kg
500 kVA (K-4) 11kV / 415V 1,350 W 5,950 W 5.0% 200% Neutral 2,150 kg
500 kVA (K-13) 11kV / 415V 1,480 W 6,400 W 5.5% 200% Neutral 2,350 kg
750 kVA (K-13) 11kV / 415V 1,850 W 8,200 W 5.5% 200% Neutral 3,100 kg
1000 kVA (K-13) 11kV / 415V 2,150 W 10,500 W 6.0% 200% Neutral 3,850 kg
1250 kVA (K-13) 11kV / 415V 2,550 W 12,800 W 6.0% 200% Neutral 4,600 kg
1500 kVA (K-20) 11kV / 415V 2,980 W 15,200 W 6.5% 200% Neutral 5,500 kg
2000 kVA (K-20) 11kV / 415V 3,650 W 18,900 W 6.5% 200% Neutral 6,700 kg
2500 kVA (K-20) 33kV / 415V 4,500 W 23,500 W 7.0% 200% Neutral 7,900 kg

Guaranteed parameters based on standard factory testing. Custom loss levels (Tier-2 Ecodesign, DOE 2016, and high-efficiency low-noise designs) are engineered on request.

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — 3D Engineering Anatomy Cutaway

High-precision 3D component breakdown of K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) illustrating CRGO silicon steel core assembly, electrolytic copper windings, insulation, and protection accessories.

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) internal 3D cutaway showing silicon steel core, copper windings, and tap changer
K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — Internal Core, Winding & Dielectric Assembly
High-Grade Silicon Core
Electrolytic Copper Coil
Off-Circuit / OLTC Tap Switch
Buchholz & Temp Relays

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — Factory Acceptance Testing (FAT)

Watch routine factory testing and quality control inspections inside XinHuan's manufacturing facility.

100% full routine tests (IEC 60076) conducted before export packing.

Engineering Submittal & Layout Workbench

Substation Room Fit & Multi-Equipment CAD Footprints

Select your equipment type and capacity to inspect verified GA engineering CAD line drawings, Single Line Diagrams (SLD), dimensions (L × W × H), roller gauge, and submittal clearances before procurement.

Available Ratings:
IEC 60076-1 Submittal Specs
XinHuan Engineering GA CAD Drawing
XinHuan Engineering Single Line Diagram (SLD)
11kV / 33kV Dual Voltage
IEC 60076 / IEEE Compliant
100% Routine Factory Tested
Export Nitrogen / Seaworthy Pack

1000 kVA Technical Dimensions

IEC 60076-1

International utility & industrial submittal specifications

Overall Length (L) 1,750 mm
Overall Width (W) 1,120 mm
Overall Height (H) 1,780 mm
Roller Wheel Track Gauge (D) 820 mm
Total Equipment Net Weight 3,820 kg
Min Substation Clearance 1,000 mm surrounding
Rated Voltage / System 11 kV / 33 kV Dual Primary
Applicable Standard IEC 60076-1 / IEEE C57
Download Technical Data Sheet (PDF) Request Factory Engineering Submittal Package

Full CAD DXF/DWG vector footprints, 3D STEP models, and custom project submittals provided within 2 hours upon request.

Quality & Compliance

Certified B2B Manufacturing & Laboratory Performance

Every transformer, compact substation, and switchgear unit is engineered under audited ISO quality management systems and type-tested according to IEC 60076 and ANSI C57 international standards.

IAF / CNAS Accredited

ISO 9001:2015 Quality System

Certified Quality Management System covering design, coil winding, vacuum drying, oil filling, and routine testing of 10kV–35kV distribution transformers.

Environmental System

ISO 14001:2015 Environmental

Environmental Management System certifying low-loss eco-designed core assemblies, zero PCB insulation oil, and environmentally safe production controls.

Occupational Health

ISO 45001:2018 Safety System

Occupational Health and Safety Management System ensuring safety containment in high-voltage testing bays and factory assembly protocols.

CNAS Lab Type Tests

IEC 60076 & GB Type Tests

Complete routine and type test records (temperature rise, impulse voltage withstand, short-circuit withstand) conducted at CNAS-accredited national research institutes.

SGS Audited Supplier

SGS Verified Manufacturer Audit

On-site factory audit certificate by SGS / Made-in-China, verifying manufacturing premises, export capacity, assembly lines, and legal qualification.

≥180 Units/Yr Export

International Delivery Certificate

Verified annual supply performance and delivery certificate for overseas power grid EPC and industrial infrastructure projects (Mozambique, Nigeria, Kenya, SEA).

Technical Q&A

Frequently Asked Questions — K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20)

K-Factor is an index defined in IEEE C57.110 quantifying a transformer's ability to withstand non-linear harmonic load currents without exceeding its thermal insulation limits. It is calculated by summing the square of the per-unit harmonic current multiplied by the square of the harmonic order. Standard transformers have K=1; non-linear loads require K-4, K-13, or K-20 ratings.

Non-linear equipment draws non-sinusoidal currents rich in 5th, 7th, 11th, and 13th harmonics. These high-frequency currents increase conductor eddy current losses proportional to the frequency squared (f²), causing severe localized winding hotspot overheating and premature insulation breakdown on conventional K-1 units.

Triplen harmonics (3rd, 9th, 15th, 21st...) generated by single-phase switch-mode power supplies do not cancel out in the neutral conductor of a three-phase system; instead, they add arithmetically. The neutral current can reach 140% to 173% of the phase current, necessitating a 200% rated copper neutral busbar to prevent dangerous busbar burn-out.

XinHuan K-factor transformers include an earthed continuous copper electrostatic shield between the primary and secondary coils. This provides galvanic common-mode noise attenuation up to 60 dB, preventing high-frequency inverter switching spikes (dI/dt) from coupling into sensitive control circuits.

Select K-4 for commercial office buildings with mild IT loads, fluorescent lighting, and welding equipment (up to 35% non-linear). Select K-13 for telecommunication hubs, industrial variable frequency drives (VFDs), and healthcare imaging (up to 75% non-linear). Select K-20 or K-30 for high-density AI data centers, UPS systems, induction melting furnaces, and central solar/BESS inverter skids (100% non-linear).

No. A K-factor transformer does not eliminate harmonic currents; rather, it is thermally and magnetically robust enough to withstand the extra eddy and stray losses generated by harmonics without derating. For harmonic cancellation, we also manufacture phase-shifting harmonic mitigating transformers (e.g. 0° and 30° paired secondary) that cancel 5th and 7th harmonics.

Our K-factor transformers comply with IEEE C57.110 (harmonic loading practice), UL 1561, AS/NZS 60076 (Australia/New Zealand), and IEC 60076-11 dry-type power transformer standards.

Please provide: rated kVA, primary/secondary voltage (e.g. 11kV to 415V/240V Dyn11), required K-factor rating (K-4, K-13, or K-20), enclosure protection (IP21 indoor or IP23/IP54 outdoor), and destination port (e.g., Fremantle, Brisbane, Sydney, Melbourne) for an authoritative 24-hour proposal.

Export Markets

Where K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) Are Supplied

🇦🇺

Australia & Oceania

Mining VFD drives in WA/Queensland, solar farm inverter step-down, and data centres.

Market guide
🌍

Global Industrial & Mining

Heavy harmonic mitigation for industrial rectifiers and automated processing plants.

Market guide

Engineering Reference Silo

Transformer Category Pillars & International Standards

China Transformer Manufacturer Export Hub
11kV Distribution Transformers IEC 60076

50–3150 kVA · IEC 60076 S11/S13/S20 hermetically sealed oil-immersed units with P0/Pk loss tables.
33kV Power & Feeder Transformers 170kV BIL

100 kVA–31.5 MVA · 170 kVp BIL lightning impulse & ONAN/ONAF cooling for utility grids.
60Hz ANSI/IEEE C57 Transformers ANSI C57.12

75–3000 kVA · 13.2kV / 13.8kV / 34.5kV DOE 2016 compliant for North & Latin America.
Pad-Mounted Transformers (ANSI) Dead-Front

75–3000 kVA · IEEE C57.12.34 tamper-resistant dead-front loop & radial feed cabinets.
2500 kVA Substation Transformers 2.5 MVA

2.5 MVA heavy industrial oil & cast resin units with Uk=6% short-circuit impedance.
11kV Cast Resin Dry-Type (SCB14) E2/C2/F1

100–3150 kVA · IEC 60076-11 Class F/H epoxy cast resin, E2/C2/F1 fire-safe, <5 pC PD.
Turnkey Compact Substations IEC 62271

100–3150 kVA · IEC 62271-202 prefabricated YBM European kiosk with MV RMU & LV panels.
Medical IT Isolation Transformers <150μA IT

3.15–100 kVA · IEC 60601-1 & IEC 61558-2-15 <150μA leakage for hospital operating rooms.
Harmonic K-Factor Transformers K-13 / K-20

50–2500 kVA · UL 1562 K-4 / K-13 / K-20 with 200% double neutral for data centers & VFDs.
Engineering Link Magnets & CAD Resources:
DWG / CAD Outline Drawings 1MVA & 2MVA Dry-Type Spec Sheet 10kV SCB13 Low-Loss Guide Solar & Wind Step-Up Units Short-Circuit & CFM Calculator P0/Pk Loss & TCO Calculator

K-Factor Harmonic Mitigating Dry-Type Transformers (K-4 / K-13 / K-20) — Direct Factory Quotation

Request Engineering Submittals & Price

Include capacity (kVA), kVA capacity, primary/secondary voltage, target K-factor (K-13 / K-20), destination port, destination port, and required quantity. Our engineers respond with certified data sheets within 24 hours.

Get a Firm Quote