TRANSFORMER CONNECTIONS AND THIRD HARMONIC COMPONENTS
When a power transformer is connected to an AC voltage source, a small primary current known as excitation current will…
CORNER GROUNDED DELTA TRANSFORMER CONNECTION
Ungrounded delta secondary connected transformers were used extensively in the early era of industrial electrical distribution. Ability to operate machinery…
IMPORTANCE OF TRANSFORMER CORE GROUNDING
Laminated steel core of a power transformer is insulated from ground and is typically referenced to ground (earth) at a…
PARAMETERS THAT DETERMINE TRANSFORMER INRUSH CURRENT
High magnitude current lasting few power cycles during switching on a power transformer is known as transformer inrush current. Magnitude…
Transformer Short Circuit Test
Short circuit test is performed on a transformer to measure the equivalent series resistance and reactance. Series resistance provides information…
Types of Transformer Cooling
Power transformers can have different kVA depending on the type of cooling method used. Heat is one of the main…