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Accueil Transformateur électrique Transformateur à sec QSG/SG 3 Phase Dry-Type Isolation Transformer
QSG/SG 3 Phase Dry-Type Isolation Transformer
QSG/SG 3 Phase Dry-Type Isolation Transformer

QSG/SG 3 Phase Dry-Type Isolation Transformer

Model: QSG/SG 3
OEM and ODM Services: Available
Enclosure: PINEELE standard
Brand: PINEELE, a Brand Under ZHENGXI
Form: All- packaged Type
Scope of Application: Widely used in industrial manufacturing, medical equipment, precision instruments, and other applications requiring stable and isolated power supply.
Reviewed By: Zheng Ji,Senior Electrical Engineer at PINEELE
18+ years of experience in HV switchgear design & testing.
Published On: mars 21, 2025
Last Updated: mars 24, 2025
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Table of Contents
  • Superior Construction and Design
  • Customizable Configurations
  • Product Model and Specifications
  • Normal Operating Conditions
  • Technical Parameters and Dimensions
  • Comprehensive Product Features

The QSG/SG Three-Phase Dry-Type Isolation Transformer series offers superior electrical performance and reliability, specifically engineered to meet rigorous international standards, including IEC439 and GB5226. Leveraging advanced winding technologies combined with vacuum impregnation processes, thesetransformersprovide exceptional insulation grades (Class F or H), guaranteeing optimal efficiency and operational safety in diverse electrical applications.

Superior Construction and Design

QSG/SG transformers incorporate robust iron cores and meticulously crafted multiple windings. These components function based on the principle of electromagnetic mutual induction, facilitating efficient conversions between voltage, current, and impedance. This series is widely applicable in AC circuits operating between 50Hz and 60Hz with voltage ratings up to 2000V, making it ideal for various three-phase power supply environments.

Customizable Configurations

One of the distinguishing features of the QSG/SG series is its high adaptability to specific user requirements. Input and output voltages, winding connection methods, capacity allocations, and secondary winding configurations can be customized extensively, ensuring that eachtransformerprecisely meets customer application needs.

Product Model and Specifications

Type Designation:

SymbolMeaning
□None: Isolation, Q: Autocoupling
SThree-phase
GDry-type transformer
□Power (KVA)

Normal Operating Conditions

  • Altitude: ≤ 2500 meters above sea level
  • Ambient temperature range: -25°C to +40°C
  • Sinusoidal current and voltage waveforms
  • Environment free from rain, snow erosion, and significant mechanical vibrations
  • Non-explosive environment without corrosive gases or conductive dust

Technical Parameters and Dimensions

Dimensions with Housing:

Product ModelInput Voltage (Default)Output Voltage (Default)Size (mm) L x W x H
QSG-5KVA380V, 660V, 440V, 380V, 220V220V, 1140V, 690V, 660V, 440V, 415V, 400V, 380V, 220V, 110V390300330
QSG-8KVACustomizable voltages availableCustomizable voltages available450300390
QSG-10KVACustomizable voltages availableCustomizable voltages available450300390
QSG-15KVACustomizable voltages availableCustomizable voltages available505350420
QSG-20KVACustomizable voltages availableCustomizable voltages available505350420
QSG-25KVACustomizable voltages availableCustomizable voltages available350500520
QSG-30KVACustomizable voltages availableCustomizable voltages available540380420
QSG-40KVACustomizable voltages availableCustomizable voltages available570420460
QSG-50KVACustomizable voltages availableCustomizable voltages available400550570
QSG-60KVACustomizable voltages availableCustomizable voltages available450600620
SG-3KVA380V, 660V, 440V, 380V, 220VCustomizable voltages available340300330
SG-5KVACustomizable voltages availableCustomizable voltages available420330360
SG-10KVACustomizable voltages availableCustomizable voltages available460350450
SG-15KVACustomizable voltages availableCustomizable voltages available490390450
SG-20KVACustomizable voltages availableCustomizable voltages available520430470
SG-25KVACustomizable voltages availableCustomizable voltages available580460450
SG-30KVACustomizable voltages availableCustomizable voltages available580460540
SG-50KVACustomizable voltages availableCustomizable voltages available750480690
SG-80KVACustomizable voltages availableCustomizable voltages available800500740
SG-100KVACustomizable voltages availableCustomizable voltages available900550840

Comprehensive Product Features

SpecificationDetail
BrandZHENGXI
ModèleQSG/SG
PhaseThree-phase
Overload Capacity±1%
Voltage Change Rate≤1.5%
Output WaveformNo distortion (compared to input waveform)
Insulation ClassClass F, high temperature resistance up to 150°C
Résistance de l'isolation≥150MΩ
EfficiencyInductive (isolated) >99%
Dielectric Strength2000VA/1min
Allowable OverloadUp to 1.2 times rated load
Design Life30 years
Noise Level≤35dB (within one meter)
Cooling MethodDry air cooling
Temperature Rise≤60°C
Frequency50/60Hz
EnvironmentTemperature: -20~+45°C, Humidity: ≤95% RH non-condensing
Workplace RequirementsFree from corrosive gases and conductive dust
Safety StandardsIEC439, VDE0550, GB226, JB5555
Connection MethodAny combination of Y/Δ
AvailabilityStandard models from 1~300KVA available in stock, customizable on request

The QSG/SG transformers provide unmatched versatility and reliability, serving critical roles in industrial, commercial, and institutional facilities where precise, stable, and efficient power delivery is paramount. Their robust construction and customizable features make them ideal for various challenging applications, ensuring enhanced performance, safety, and longevity.

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