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Isolation Transformers
Three-Phase Dry Isolation
SKU: XH-SG-ISO
SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA)
SG series three-phase dry-type isolation transformers designed for imported CNC machinery, precision tools, medical devices, and rectifier power supplies. Features 100% galvanic isolation, custom voltage ratios, Dyn11/Yyn0 vector groups, and pure copper conductor windings.
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
SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA) — Technical Parameters & Ratings
| Rated Capacity Range | 0.3 kVA to 180 kVA (e.g. 5 kVA, 10 kVA, 50 kVA, 100 kVA) |
|---|---|
| Primary Input Voltage | 220V, 230V, 380V, 400V, 415V, 440V, 480V, 660V (Customizable) |
| Secondary Output Voltage | 200V, 220V, 380V, 400V, 415V, 110V (Customizable) |
| Target Philippine Spec | 220V 3-Phase Input -> 380V 3-Phase Output, 5 kVA, 100% Copper Conductor |
| Rated Frequency | 50 Hz / 60 Hz |
| Number of Phases | Three Phase (3-Phase 3-Wire or 3-Phase 4-Wire with Neutral) |
| Conductor Material | 100% Pure Oxygen-Free Copper (Cu) |
| Insulation Resistance | ≥ 100 MΩ (DC 1000V) |
| Dielectric Strength | 2500V AC / 1 min (No flashover or breakdown) |
| Efficiency | ≥ 98.0% |
| Noise Level | < 45 dB(A) |
| Temperature Rise | < 80K (Class F) / < 100K (Class H) |
| Enclosure Protection | IP00 (Open Type) / IP20 / IP54 (Ventilated Louver Cabinet) |
| Model SG-0.3/0.5KVA | Bmax: 210 mm, Cmax: 230 mm, Dmax: 180 mm, Packing L: 210 mm, Packing W: 230 mm, Packing H: 180 mm |
| Model SG-0.75KVA | Bmax: 250 mm, Cmax: 230 mm, Dmax: 180 mm, Packing L: 210 mm, Packing W: 230 mm, Packing H: 180 mm |
| Model SG-1KVA | Bmax: 250 mm, Cmax: 300 mm, Dmax: 230 mm, Packing L: 310 mm, Packing W: 410 mm, Packing H: 285 mm |
| Model SG-1.5KVA | Bmax: 280 mm, Cmax: 300 mm, Dmax: 230 mm, Packing L: 310 mm, Packing W: 410 mm, Packing H: 285 mm |
| Model SG-2~5KVA | Bmax: 280 mm, Cmax: 400 mm, Dmax: 390 mm, Packing L: 310 mm, Packing W: 440 mm, Packing H: 490 mm |
| Model SG-6KVA | Bmax: 320 mm, Cmax: 450 mm, Dmax: 460 mm, Packing L: 360 mm, Packing W: 490 mm, Packing H: 560 mm |
| Model SG-8~15KVA | Bmax: 350 mm, Cmax: 500 mm, Dmax: 520 mm, Packing L: 380 mm, Packing W: 550 mm, Packing H: 650 mm |
| Model SG-20/25KVA | Bmax: 400 mm, Cmax: 550 mm, Dmax: 570 mm, Packing L: 430 mm, Packing W: 600 mm, Packing H: 700 mm |
| Model SG-30KVA | Bmax: 450 mm, Cmax: 600 mm, Dmax: 620 mm, Packing L: 380 mm, Packing W: 550 mm, Packing H: 650 mm |
| Model SG-35KVA | Bmax: 450 mm, Cmax: 600 mm, Dmax: 620 mm, Packing L: 480 mm, Packing W: 640 mm, Packing H: 780 mm |
| Model SG-40KVA | Bmax: 450 mm, Cmax: 600 mm, Dmax: 620 mm, Packing L: 380 mm, Packing W: 550 mm, Packing H: 650 mm |
| Model SG-50~70KVA | Bmax: 750 mm, Cmax: 600 mm, Dmax: 750 mm, Packing L: 780 mm, Packing W: 640 mm, Packing H: 870 mm |
| Model SG-80~125KVA | Bmax: 850 mm, Cmax: 650 mm, Dmax: 850 mm, Packing L: 880 mm, Packing W: 690 mm, Packing H: 1000 mm |
| Model SG-150/180KVA | Bmax: 1000 mm, Cmax: 700 mm, Dmax: 950 mm, Packing L: 1040 mm, Packing W: 750 mm, Packing H: 1100 mm |
Technical Highlights
- Factory-direct China pricing with full IEC 60076 type test certification
Application Scenarios
- CNC Machine Tools, Imported Equipment 220V/380V/480V, Medical Equipment, Industrial Rectifiers
Key Features
- Galvanic isolation for 50/60Hz AC circuits with voltages up to 660V
- Pure copper conductor windings with heavy-duty thermal insulation
- Custom voltage ratios (e.g. 220V to 380V, 480V to 220V, 415V to 380V)
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.
PSCAD™ & ETAP® Grid Simulation
Non-Linear V-I Saturation Curve & Air-Core Inductance (\(L_{\text{air}}\))
Precision core excitation characteristics, non-linear knee inflection (\(V_k\)), and air-core reactance (\(X_{\text{air}}\)) calibrated for SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA).
Quick Rating Switch
kVA
kV
%
2.10
1.80 (Compact Shell)
2.10 (Standard IEEE / CIGRE)
2.50 (Outer HV Layer)
Air-Core Inductance (\(L_{\text{air}}\))
18.7× In Peak
81.65 mH
Reactance
25.65 Ω
Knee \(V_k\)
13.0 kV
Decay \(\tau\)
0.17 s
Non-Linear Magnetization Characteristic (\(\lambda - I_{\text{exc}}\))
Interactive Vector Plot
Linear Core Zone
Knee Transition
Air-Core Slope (\(X_{\text{air}}\))
| PSCAD Simulation Point | Voltage (\(V_{\text{pu}}\)) | Flux (\(\lambda\), Wb-t) | Current (\(I_{\text{pu}}\)) | Current (A) |
|---|
Data formatted for direct entry into PSCAD Classical Saturable Transformer and UMEC core components per IEEE C57.12.00 & CIGRE 33.02.
XinHuan Hefei Manufacturing Plant — Precision Winding & Assembly Line
Factory Build Quality
SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA) — 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
SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA) — 100% Factory Acceptance Testing (FAT)
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
SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA) — Export Packaging & Seaport Logistics
Export standard wooden crate, 10-15 business days lead time
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
SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA) — Engineering & Procurement FAQs
Frequently asked questions regarding specifications, certifications, and delivery for SG Three Phase Dry-Type Isolation Transformer (0.3 kVA – 180 kVA).
Request Custom 3-Phase Voltage Stepping & Quotation
IEC 60076-11, CE, ISO 9001
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).
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Engineering Reference Silo
Transformer Category Pillars & International Standards
Engineering Link Magnets & CAD Resources: