QSG/SG 3 Phase Dry-Type Isolation Transformer

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, these transformers provide 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 each transformer precisely meets customer application needs.

Product Model and Specifications

Type Designation:

Symbol	Meaning
□	None: Isolation, Q: Autocoupling
S	Three-phase
G	Dry-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:

Comprehensive Product Features

Specification	Detail
Brand	ZHENGXI
Model	QSG/SG
Phase	Three-phase
Overload Capacity	±1%
Voltage Change Rate	≤1.5%
Output Waveform	No distortion (compared to input waveform)
Insulation Class	Class F, high temperature resistance up to 150°C
Insulation Resistance	≥150MΩ
Efficiency	Inductive (isolated) >99%
Dielectric Strength	2000VA/1min
Allowable Overload	Up to 1.2 times rated load
Design Life	30 years
Noise Level	≤35dB (within one meter)
Cooling Method	Dry air cooling
Temperature Rise	≤60°C
Frequency	50/60Hz
Environment	Temperature: -20~+45°C, Humidity: ≤95% RH non-condensing
Workplace Requirements	Free from corrosive gases and conductive dust
Safety Standards	IEC439, VDE0550, GB226, JB5555
Connection Method	Any combination of Y/Δ
Availability	Standard 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.

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:	21 March, 2025
Last Updated:	24 March, 2025