Ref: XH-SUB-2026-0181
XINHUAN
Submittal Package
Anhui XinHuan Electrical Power Equipment Co., Ltd. | Hefei Manufacturing Base
CNAS Test Certified | ISO 9001:2015 | ISO 14001:2015 Registered OEM
SUBMITTAL REF: XH-SUB-2026-0181
Date: 2026-10-30
Standard: IEC 60076 / GB/T 1094 / ANSI C57
Isolation Transformers
250 kVA Three-Phase VPI Vacuum Pressure Impregnated Dry Transformer
Submittal Specification Datasheet & Engineering Technical Parameters
1. Electrical Technical Parameters & Ratings
| Parameter Specification | Design Rating & Certified Value |
|---|---|
| Model Series | SCB10 / SCB11 / SCB13 / SCB14 |
| Rated Capacity | 250 kVA |
| Primary Voltage (U1) | 10,000 V (10 kV / 11 kV) |
| Secondary Voltage (U2) | 400 V / 415 V / 480 V (3-Phase 4-Wire) |
| Vector Group | Dyn11 |
| Rated Frequency | 50 Hz / 60 Hz |
| Cooling Method | AN (Natural Air) / AF (Forced Air Blower) |
| Primary Current (I1) | 14.43 A |
| Secondary Current (I2) | 347.8 A |
| Guaranteed No-Load Loss (P0) | 720 W |
| Guaranteed Load Loss (Pk at 120°C) | 2830 W |
| Short-Circuit Impedance (Uk) | 4.0% |
| Insulation Class | F Class (155°C) / H Class (180°C) Epoxy Cast Resin |
| Temperature Rise Limit | Winding Temp Rise ≤ 100 K (F Class) / ≤ 125 K (H Class) |
| IP Protection Class | IP00 (Open Type) / IP20 (Indoor Enclosure) / IP23 (Loubered) |
| Total Weight | 1320 kg |
| Overall Footprint (L×W×H) | 1050 mm × 800 mm × 1120 mm |
| Governing Standards | IEC 60076-11, GB/T 10228-2015, CE, ISO 9001 |
Transient Simulation & Saturation Characteristics (PSCAD / ETAP / EMTP)
IEEE C57.12.00 / IEC 60076-1| Electromagnetic Parameter | Design Characteristic & Certified Benchmark | Grid Study Application |
|---|---|---|
| Saturation Knee-Point Voltage (\(V_k\)) | 1.15 ~ 1.22 p.u. of \(V_n\) (CRGO Laser Core) | Overvoltage & Ferroresonance Protection |
| Air-Core Reactance (\(X_{\text{air}}\)) | \(2.0 \sim 2.5 \times X_{sc}\) (Standard: \(2.1 \times X_{sc}\)) | Deep Saturation Inrush Peak Limit |
| Air-Core Inductance (\(L_{\text{air}}\)) | \(L_{\text{air}} = X_{\text{air}} / (2\pi f)\) (Winding Specific) | PSCAD Saturable Core / UMEC Modeling |
| Inrush Current Ratio (\(I_{\text{inrush}} / I_n\)) | 8.0 ~ 12.0 × Rated \(I_n\) (Decay \(\tau \approx 0.15\text{s} \sim 0.35\text{s}\)) | Protective Relay Coordination & POI Voltage Dip |
| Magnetizing Inrush Decay Constant (\(\tau\)) | \(\tau = L_{\text{air}} / R_w\) (Typically 100 ms – 350 ms) | Differential Relay (87T) Harmonic Restraint |
Need project-specific \(V\text{-}I\) curve or PSCAD `.csv` dataset for renewable grid interconnection?
Interactive V-I Calculator
2. 2D AutoCAD General Arrangement (GA) Drawing & Dimensional Profile
Figure 2.1 — 2D AutoCAD Dimensional Submittal Schematic
Dimensional & Installation Requirements
- Foundational Base: Steel channel Skid / Sub-station Pad Mounting.
- Bushings Orientation: HV top-mounted / side-cabinet entry option.
- Grounding Terminals: Dual M12 copper grounding pads on diagonal corners.
- Enclosure Protection: IP54 Outdoor Corrosive C4/C5 Marine Paint Coating.
- CAD Drawing File: Request `.DXF` or `.DWG` blocks from sales engineering.
3. Factory Acceptance Testing (FAT) & Routine Test Protocol
Every transformer manufactured by XinHuan undergoes 100% routine inspection in accordance with IEC 60076-1 before dispatch. Routine test certificates are included in the shipment package.
1. Winding Resistance Measurement (HV & LV)
2. Voltage Ratio & Vector Group Phase Displacement
3. Short-Circuit Impedance & Load Loss Test
4. No-Load Loss ($P_o$) & Excitation Current Test
5. Separate-Source AC Dielectric Withstand Test
6. Induced Overvoltage Withstand Test (DVWV)
7. Insulation Resistance & Polarization Index (Megger)
8. Hermetic Tank Pressure Leakage & Oil BDV Test
9. Extended Excitation Characteristic & Knee-Point Verification (to 120% \(V_n\))
10. Frequency Response Analysis (FRA) & Air-Core Reactance Test (Optional)
4. Seaport Logistics, Packaging & Warranty Terms
Export Packaging
IPPC fumigated solid wooden crate skid with vacuum moisture foil barrier.
Primary Delivery Ports
CIF Chancay, Callao, Apapa, Mombasa, Manila, Jakarta, Santos, & Valparaiso.
Factory Warranty
36 Months Full Replacement / Factory Engineering Warranty against defects.
Anhui XinHuan Electrical Power Equipment Co., Ltd.
Factory Address: Industrial Park, Hefei City, Anhui Province, China | Export Dept: [email protected]
Submittal Document Code: XH-SUB-2026-0181 — Confidential Technical Datasheet