VEM-350
Vibration-EM Series • 350kVA • 0.38/0.38 kV
VEM-350 is a 350 kVA, 0.38/0.38 kV special/isolation/control transformer manufactured by Shandong Yaqing Electric Power Technology Co., Ltd. (QDTB) in Qingdao, China, designed and tested in accordance with GB/T 1094, IEC 60076, short-circuit impedance 10%, approximate weight 980 kg. Available on FOB Qingdao terms; datasheet, routine test report and GA drawing issued with each unit.
Technical Specifications
| Model | VEM-350 |
|---|---|
| Rated Capacity | 350kVA |
| HV Voltage | 0.38 kV |
| LV Voltage | 0.38 kV |
| Input Voltage | 220V |
| Frequency | 50 Hz |
| Short-circuit Impedance | 10% |
| Cooling | AN |
| No-load Loss | 7000 W |
| Load Loss | 14000 W |
| Weight | 980 kg |
| Dimensions | 770×635×770 mm |
| Applied Standard | GB/T 1094, IEC 60076 |
Typical operating points
Calculated from this model’s nameplate losses (P₀ 7000 W, P_k 14000 W), u_k 10%, at power factor 0.9.
| Load | Output (kW) | No-load loss (kW) | Load loss (kW) | Total loss (kW) | Efficiency (%) | Voltage regulation (%) |
|---|---|---|---|---|---|---|
| 50% | 157.5 | 7.000 | 3.500 | 10.500 | 93.75 | 3.85 |
| 75% | 236.3 | 7.000 | 7.875 | 14.875 | 94.08 | 5.82 |
| 100% | 315.0 | 7.000 | 14.000 | 21.000 | 93.75 | 7.81 |
| 125% | 393.8 | 7.000 | 21.875 | 28.875 | 93.17 | 9.82 |
Highest efficiency around 247 kVA (70.7% of rating) — β* = √(P₀ / P_k).
Product Image & Parameters
Images are for illustration purposes only
VEM-350
Vibration-EM Series
TECHNICAL DRAWING
Model: VEM-350 | Type: Oil-immersed transformer | Capacity: 350 kVA
FRONT ELEVATION
ELECTRICAL SCHEMATIC
EFFICIENCY vs LOAD
SIDE VIEW
TOP VIEW
TERMINAL BLOCK
CORE & WINDING
Technical specifications
LEGEND:
Product Description
VEM-350 series Vibration-EM Pulse transformer. 350kVA 0.38kV/0.38kV. Class F insulation, dry-type design. Genuine QDTB product, ISO 9001 certified, global export.
Instant Selection & Quote Calculator
Select your specifications to get an estimated price instantly.
More options(2)
Certification
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.
特种/隔离/控制变压器（产品库逐型号 noLoadLoss，无独立能效档维度）
Reference prices are for estimation only and do not constitute a formal offer.
3 · Get this quote
We will reply with your latest quote instantly.
VEM-350 - Frequently Asked Questions
QWhat are the main applications of VEM-350?
VEM-350 (Vibration-EM series, Special/Isolation/Control 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 VEM-350?
Key specifications: Capacity: 350kVA, HV 0.38 kV, LV 0.38 kV, Frequency 50 Hz, Impedance 10%, Cooling AN, Standard GB/T 1094, IEC 60076.
QCan VEM-350 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.
Interested in VEM-350?
Contact us for pricing, technical support, or custom requirements.