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R-Core & Audio Transformers
R-Core Power Transformers
SKU: XH_R30_E8208_EXPORT_R_CORE_TRANSFORMER
R30-E8208 / ECTHF 18821 30VA Export R-Core Power Transformer
30VA factory certified export R-Core power transformer manufactured by Anhui BuJuan Overseas Info-Tech / XinHuan. Dual 110VAC 50Hz/60Hz universal primary (series 220V/230V or parallel 110V), multi-rail isolated secondary (24VAC 0.5A, dual 13.5VAC 0.8A, 6VAC 1A), electrostatic Faraday shield grounding lead, and black insulated outer wrapper.
Compliance Standards
IEC • ANSI • IEEE • GB
Quality Inspection
100% FAT Routine Tested
Engineering CAD
2D CAD / SLD Schematics
Global Logistics
Direct Seaport CIF Export
Engineering Datasheet
Technical Parameters & Ratings
| Power Rating | 30 VA |
|---|---|
| Model Number | R30-E8208 / ECTHF 18821 |
| Input Voltage | Dual 110VAC 50Hz (Red-Black & Yellow-Green, Series 220V / Parallel 110V) |
| Secondary Output 1 | 24 VAC / 0.5A (Gray-Gray) |
| Secondary Output 2 | 13.5 VAC / 0.8A (Blue-Blue) |
| Secondary Output 3 | 13.5 VAC / 0.8A (White-White) |
| Secondary Output 4 | 6 VAC / 1.0A (Green-Green) |
| Electrostatic Shield | Faraday Copper Shield (Yellow/Green Earth Ground) |
| Core Construction | Continuous Grain-Oriented Nippon Steel Silicon Ribbon (Gapless R-Core) |
| Dielectric Isolation | 4,000 V AC Primary-to-Secondary / Core (1 Minute) |
| Temperature Rise | < 30K under continuous full rated load |
| Dimensions (L×W×H) | 78 × 68 × 46 mm |
| Mounting Hole Distance | 68 × 52 mm (M4 Galvanized Footplate) |
| Net Weight | 0.68 kg |
| Manufacturer & Export Entity | ANHUI BUJUAN OVERSEAS INFO-TECH CO., LTD. / Hefei XinHuan Transformer Co., Ltd. |
Technical Highlights
- Continuous grain-oriented silicon core exhibits zero mechanical hum, <5 mG stray magnetic leakage, and superior line regulation.
Application Scenarios
- Audiophile DACs, CD player power supplies, reference solid-state preamps, and medical lab instrumentation.
Key Features
- Export-certified R-core power transformer with dual 110VAC universal primary (series 220V or parallel 110V configuration).
- Precision quad-rail secondary windings (24V 0.5A + dual 13.5V 0.8A + 6V 1A) engineered for high-end audio DACs and preamplifiers.
- Built-in Faraday electrostatic copper shield with dedicated yellow/green earth lead eliminates high-frequency mains interference.
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:
11kV / 33kV Dual Voltage
IEC 60076 / IEEE Compliant
100% Routine Factory Tested
Export Nitrogen / Seaworthy Pack
1000 kVA Technical Dimensions
IEC 60076-1International 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.
XinHuan Hefei Manufacturing Plant — Precision Winding & Assembly Line
Factory Build Quality
Internal Construction & Premium Materials
Built with tier-1 certified raw materials engineered for long operational life (>30 years), superior dielectric withstand, and high short-circuit withstand capacity.
Silicon Steel Core
High-grade grain-oriented cold-rolled silicon steel with step-lap mitered joints for low $P_o$ losses.
100% Copper Windings
Electrolytic oxygen-free copper with high thermal grade insulation for surge resistance.
Precision Tap Changer
De-energized tap switch ($\pm 2 \times 2.5\%$) or on-load vacuum tap changer (OLTC) optional.
Protection & Sensors
Buchholz gas relay, magnetic oil gauge (MOG), and dial thermometers with alarm contacts.
Quality Assurance
CNAS & ISO 9001 Certified
100% Factory Acceptance Testing (FAT) Protocol
Every transformer unit manufactured by XinHuan undergoes mandatory routine factory testing prior to container dispatch. Full certified routine and type test submittal reports are provided with commercial documentation:
1. Insulation Resistance
Megger test (HV to LV, HV to Earth, LV to Earth) >1000 MΩ.
2. Voltage Ratio & Vector
Turns ratio check across all taps with phase displacement check.
3. Winding DC Resistance
Precision Kelvin bridge measurement across all tap positions.
4. Short-Circuit Impedance
Load loss ($P_k$) measurement corrected to reference temp (75°C).
5. No-Load Loss & Current
Core excitation test ($P_o$ and $I_o$) at rated sinusoidal voltage.
6. AC Voltage Withstand
Power-frequency separate source test (e.g. 50kV/70kV 1 min).
7. Lightning Impulse (BIL)
Full wave & chopped wave impulse withstand (BIL up to 170kV).
8. Partial Discharge & Seals
Ultra-low discharge (<5 pC) and pressurized oil/gas tightness test.
Logistics Intelligence
Global CIF / FOB Delivery
Export Packaging & Seaport Logistics
Export carton with custom-molded high-density foam cushioning. Global express DHL/FedEx or palletized sea freight dispatch.
Production Lead Time
Standard manufacturing cycle is 4 to 6 weeks from approval of GA blueprints and single-line diagrams.
Heavy-Duty Export Packaging
Vacuum moisture barrier preservation, nitrogen blanketing, and reinforced steel-frame structural crate skids.
Direct Seaport Routes
Fast ocean freight to Port of Chancay & Callao (25-35 days), Manila, Lagos, and Middle East ports.
Equipment Video Inspection
100% TestedWatch XinHuan technicians perform routine dielectric testing, winding insulation checks, and quality inspections inside our Hefei manufacturing plant.
Every unit 100% routine tested before container loading.
Direct Factory Consultation
Need Custom Project Engineering?
Send your single-line diagram (SLD), voltage ratings, or tender specifications. Our chief electrical engineers will review and issue an actionable CIF quotation within 24 hours.
Custom Voltage Ratios
High-Altitude Derating
Short-Circuit Impedance
Third-Party FAT Witness
Engineering & Procurement FAQs
Frequently asked questions regarding specifications, certifications, and delivery for R30-E8208 / ECTHF 18821 30VA Export R-Core Power Transformer.
Contact engineering with your required secondary voltage rails and jumper preferences for same-day CAD drawing confirmation.
Manufactured in compliance with IEC 61558-1, IEC 61558-2-4, UL 5085, CE, RoHS. 100% dielectric withstand hi-pot tested at 4,000V AC.
Standard manufacturing lead time is 4 to 6 weeks following approval of GA blueprints and single-line diagrams. Direct sea container shipping is available under FOB, CFR, or CIF terms with full customs documentation (Bill of Lading, Certificate of Origin, Test Reports).