Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

What is Transformer Testing ?Transformer test definitionTransformer testing involves various procedures to confirm the specifications and performance of the transformer before and after installation.Transformer test type Type test Routine inspection Special testTransformer type testIn order to prove that the transformer meets the customer's specifications and design expectations, the transformer must undergo different test procedures at the manufacturer's site. Some transformer tests are perform

What is a Voltage Transformer ?Voltage Transformer DefinitionA voltage transformer, also known as a potential transformer, steps down high system voltages to safer, lower levels suitable for standard meters and relays.Basic OperationThese transformers connect their primary windings across a phase and the ground, operating like other step-down transformers but specifically for voltage management.Standard Secondary VoltageThe secondary voltage output of a typical voltage transformer is generally 1

What is a Instrument Transformer?Instrument Transformer DefinitionAn instrument transformer is a device that steps down high voltage and current from power systems to manageable levels for measurement and safety.Advantages Large voltages and currents in AC power systems can be accurately measured using instruments with small ratings, such as 5 A and 110–120 V. Lower the cost Which reduces the electrical insulation requirement for measuring instruments and protective circuits and also assures the

What is Isolation Transformer?Isolation Transformer DefinitionAn isolation transformer is defined as an electromagnetic device that transfers AC electrical energy between two circuits while maintaining the same frequency and providing galvanic isolation.Safety and ProtectionEssential for protecting both electronic components and operators from electrical shocks, particularly in environments where equipment is not galvanically isolated.Noise and Interference ControlIsolation transformers help sup

What is a Core Transformer?Air Core Transformer DefinitionAn air core transformer is defined as a transformer that uses air instead of a ferromagnetic core to link the magnetic flux between its windings.Principle of OperationIt operates on electromagnetic induction, where an alternating current in the primary coil induces an emf in the secondary coil.Construction TypesAir core transformers can be cylindrical, with wires wound on a non-metallic cylinder, or toroidal, with wires wound around a pla

What is Earthing Transformer ?Earthing TransformerEarthing Transformeris a special transformer, its main function is to provide an artificial neutral point for the neutral point is not grounded system, easy to use arc suppression coil or small resistance grounding mode, in order to reduce the size of the ground capacitance current when the grounding short-circuit fault occurs in the distribution network, improve the power supply reliability of the distribution system.Earthing Transformer structu

What is the Tertiary Winding of Transformer?Tertiary Winding DefinitionThe tertiary winding in a transformer is an additional winding besides the primary and secondary windings, creating a three-winding transformer.Delta ConnectionThe tertiary winding’s delta connection helps limit fault current during short circuits.Stabilization RoleIn star-star transformers, the tertiary winding stabilizes the system by allowing the circulation of zero-sequence currents.Rating and DesignThe design of the tert

What is an Auto Transformer?Auto Transformer DefinitionAn auto transformer is defined as a type of electrical transformer with a single winding acting as both the primary and secondary winding.Single Winding TheoryAn auto transformer uses a single winding for both the primary and secondary purposes, unlike two-winding transformers which use separate windings. The diagram below illustrates this concept.The winding AB of total turns N1 is considered as primary winding. This winding is tapped from

What is a Step Down Transformer?Step Down Transformer DefinitionA step-down transformer is defined as a transformer that converts high voltage (HV) to low voltage (LV) and high current on the secondary side.Working PrincipleThe working principle involves transforming electrical energy to magnetic energy in the core and back to electrical energy on the secondary side.Turns RatioThe turns ratio (n) is the ratio of primary to secondary voltage, which equals the ratio of turns on the primary side to

What is a Step Up Transformer ?Step Up Transformer DefinitionA step-up transformer is a device that increases the voltage while decreasing the current from its primary to its secondary side.Working PrincipleIt operates by converting electrical energy to magnetic energy and back, utilizing the transformer core.Voltage Transformation FormulaThe formula for output voltage in a step-up transformer shows how the voltage is adjusted according to the turns ratio of the windings.ApplicationsStep-up tran