As electrical systems and equipment evolve, it is essential for manufacturers and engineers to ensure their reliability, durability, and safety through thorough testing before installation. One critical component used in various types of tests is the test transformer.
Test transformers can be classified into three main types – oil-immersed, dry-type, and SF6 gas test transformers. Each type has unique features and applications that make them suitable for different testing requirements.
Oil-immersed test transformers are the most commonly used as they provide high voltage and currents and can handle large power outputs. They are used for testing power equipment such as transformers, cables, and switchgear. The insulation medium in these test transformers is oil, which offers excellent dielectric properties and is self-healing. These types of transformers are used for high-voltage testing applications, where accuracy and reliability are essential.
Dry-type test transformers have gained popularity due to their high safety levels. These transformers do not require any oil or cooling system, making them eco-friendly and ideal for confined spaces. They also come in smaller sizes, making them easy to transport from one location to another. Dry-type transformers can be used for various applications like insulation resistance testing, voltage withstanding testing, and transformer testing.
SF6 gas test transformers have excellent insulation properties, making them ideal for high voltage and high current testing. These transformers use SF6 gas as an insulating medium, have low maintenance requirements, and are compact in design. They are commonly used in research laboratories, industrial testing, and for testing high voltage power equipment such as circuit breakers, transformers, and switchgear.
Insulated cylindrical test transformer: complete equipment with strong compatibility, complete voltage capacity series, perfect function; The impedance is low, and the system impedance is not more than 5%, which meets the requirements of AC pollution test; Fast electronic protection device, high reliability.
Series high voltage test transformer: small capacity, low voltage, lightweight, easy to transport, many connections, high cost.
Test transformers are essential components in testing electrical equipment, ensuring their safety, and reliability. The type of transformer to use depends on the test requirement, the voltage and current specifications, as well as the size and safety requirements. Therefore, it is imperative to choose the right type of test transformer to achieve accurate and reliable results.