ISO-500KVA
Oil-Immersed Isolation Transformers Series • 500kVA • 10/0.4 kV
ISO-500KVA is a 500 kVA, 10/0.4 kV three phase transformer manufactured by Shandong Yaqing Electric Power Technology Co., Ltd. (QDTB) in Qingdao, China, designed and tested in accordance with IEC 60076 / GB1094.1, vector group Dyn11, short-circuit impedance 4.5%, approximate weight 1035 kg. Available on FOB Qingdao terms; datasheet, routine test report and GA drawing issued with each unit.
Technical Specifications
| Model | ISO-500KVA |
|---|---|
| Rated Capacity | 500kVA |
| HV Voltage | 10 kV |
| LV Voltage | 0.4 kV |
| Input Voltage | 10kV (3-phase) |
| Output Voltage | 0.4kV isolated secondary |
| Frequency | 50/60 Hz |
| Vector Group | Dyn11 |
| Short-circuit Impedance | 4.5% |
| Cooling | ONAN |
| Insulation | A(105°C) |
| Temperature Rise | 65 K |
| No-load Loss | 680 W |
| Load Loss | 5100 W |
| Efficiency | >97% |
| Weight | 1035 kg |
| Dimensions (L x W x H) | 2085 x 1620 x 2780 mm |
| Applied Standard | IEC 60076 / GB1094.1 |
Typical operating points
Calculated from this model’s nameplate losses (P₀ 680 W, P_k 5100 W), u_k 4.5%, at power factor 0.9.
| Load | Output (kW) | No-load loss (kW) | Load loss (kW) | Total loss (kW) | Efficiency (%) | Voltage regulation (%) |
|---|---|---|---|---|---|---|
| 50% | 225.0 | 0.680 | 1.275 | 1.955 | 99.14 | 1.43 |
| 75% | 337.5 | 0.680 | 2.869 | 3.549 | 98.96 | 2.16 |
| 100% | 450.0 | 0.680 | 5.100 | 5.780 | 98.73 | 2.89 |
| 125% | 562.5 | 0.680 | 7.969 | 8.649 | 98.49 | 3.63 |
Highest efficiency around 183 kVA (36.5% of rating) — β* = √(P₀ / P_k).
Product Image & Parameters
Images are for illustration purposes only
ISO-500KVA
Oil-Immersed Isolation Transformers Series
TECHNICAL DRAWING
Model: ISO-500KVA | Type: Oil-immersed transformer | Capacity: 500 kVA
FRONT ELEVATION
ELECTRICAL SCHEMATIC
EFFICIENCY vs LOAD
SIDE VIEW
TOP VIEW
TERMINAL BLOCK
CORE & WINDING
Technical specifications
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Product Description
ISO-500KVA Oil-Immersed Isolation Transformers Oil-immersed Isolation Transformer, rated 500kVA, input 10kV (3-phase), output 0.4kV isolated secondary, eff >97%, freq 50/60, weight 1035kg, ISO certified China manufacturer
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The values below are computed from what you selected above. Anything that cannot be computed yet is shown as an em dash — never as zero.
Iₙ = S / (√3·U) · I_sc = 100·Iₙ / uₖ · S_sc = √3·U·I_sc · I_p = k·Iₖ
Still required to complete the calculation: rated capacity S, impedance voltage uₖ, short-time or peak withstand current.
Per-model values (P0 / Pk / uₖ declared by the factory, losses, noise, temperature rise, dimensions, weight) are not in the product library: those rows stay at an em dash until the factory parameter sheet is supplied. An em dash means the value is unavailable — it is never rendered as zero.
Read-only: no price factor, not part of the sum — the loss-grade cost is already carried by the efficiency (subtype) base price, so charging here would double-bill. Values come from the product library type-test data, interpolated between published capacities; grades the library does not cover show an em dash, never zero.
Reference prices are for estimation only and do not constitute a formal offer.
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ISO-500KVA - Frequently Asked Questions
QWhat are the main applications of ISO-500KVA?
ISO-500KVA (Oil-Immersed Isolation Transformers series, Three Phase Transformers) is widely used in industrial power distribution, commercial buildings and utility power systems. Can be flexibly configured according to actual project requirements.
QWhat are the main technical specifications of ISO-500KVA?
Key specifications: Capacity: 500kVA, HV 10 kV, LV 0.4 kV, Frequency 50/60 Hz, Impedance 4.5%, Connection Dyn11, Cooling ONAN, Standard IEC 60076 / GB1094.1.
QCan ISO-500KVA be custom ordered?
Yes. QDTB® provides comprehensive OEM/ODM customization services. Parameters such as capacity, voltage ratio, cooling method, connection group and protection class can all be adjusted. Over 25 years of manufacturing experience ensures consistent quality.
QHow to get a quote and technical documentation?
Contact via the "Send Inquiry" button below, or contact sales at Alice@qdtb-transformer.com / +86 13698683193. We provide detailed quotations and technical documentation instantly.
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