R-Core & Precision Audio Transformers — Direct China Manufacturer XinHuan

Precision & Audiophile Series

R-Core & Precision Audio Transformers

Continuous wound silicon steel cores, annealed OFC copper shielding, ultra-low stray flux leakage (<5 mG), and twin-bobbin symmetry for audiophile DACs, preamps, and tube output stages.

15 VA – 500 VA · < 5 mG Stray Field · 4,000V Isolation

Matched Products

12

Voltage Class
Rated Capacity
Precision Magnetic Engineering

Precision R-Core & High-Fidelity Audio Transformers (<5 mG Stray Field Leakage)

Manufactured with continuous strip-wound Nippon Steel silicon steel cores and symmetrical dual-bobbin windings. Delivers virtually zero magnetic leakage flux, ultra-quiet mechanical hum, and exceptional transient audio dynamics.

< 5 mG Stray Flux Leakage

Continuous wound circular core cross-section produces 90% less magnetic leakage field than conventional EI laminated cores.

Completely Silent Mechanical Hum

Vacuum pressure varnish impregnation eliminates core delamination and audible magnetostrictive hum in quiet studio environments.

OFC Copper & Inter-Winding Shield

Annealed OFC copper windings separated by heavy-gauge Faraday electrostatic shield block mains high-frequency EMI noise.

Twin-Bobbin Symmetrical Balance

Dual-chamber winding architecture provides perfectly balanced winding resistance and magnetic coupling across both rails.

R-Core & Audio Matrix

Model Series VA Range Core Material Application
XH-R Series 15VA – 500VA Nippon Steel CRGO DACs, Preamps, Instruments
XH-OPT Series 10W – 100W Z11 Annealed Steel Tube Amp Single-Ended/PP
XH-CHOKE 5H – 20H Oriented Silicon Steel Tube Power Filter Chokes
CE & RoHS Certified Request Custom R-Core

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).

FACTORY & TESTING WALKTHROUGHS

See XinHuan in Action (Production & Testing)

Factory tours, high-voltage routine test procedures, and production walkthroughs straight from our Hefei manufacturing base.

Company Tour

Corporate & Factory Tour

Hefei manufacturing base, automated workshops, and high-voltage testing laboratory.

Oil-Immersed

Oil Transformer Routine Testing

100% IEC 60076 voltage ratio, winding resistance, and dielectric routine testing.

Dry-Type

Cast Resin Dry-Type Quality

Epoxy resin vacuum casting, partial discharge testing, and temperature monitoring.

Production Floor

Transformer Assembly Floor

Precision copper winding, silicon steel core stacking, and vacuum drying chambers.

Production Line

Transformer Production Floor

Automated coil winding, precision core stacking, and vacuum drying chambers.

Switchgear

High-Voltage Switchgear

Vacuum circuit breakers, copper busbar routing, and relay protection cabinets.

Compact Substation

European Compact Substation

Prefabricated kiosk substation panel wiring, RMU integration, and LV distribution.

Dry-Type Assembly

Dry-Type Production Line

Copper foil winding, vacuum resin casting molds, and core-coil assembly.

Production Archives & Virtual Tours: Watch routine testing procedures, FAT walkthroughs & workshops.
360° Virtual Tour · XinHuan Official YouTube Channel

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