Electrical Transformer Archives

Transformer Fault Current: What It Is and How to Calculate it?

To determine the transformer fault current we need to talk about one very important transformer parameter shoirt circuit impedence of a transformer. The meaning of short-circuit impedance The short-circuit impedance of the transformer is more often called the impedance voltage, and the symbol is Uk%.The measurement method of impedance voltage is to short-circuit the low-voltage …

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Isolation Transformer: All You Need to Know

Sometimes we see small isolation transformers in electronic devices and might be wondering what the use of this mini transformer is. Single-phase power wiring uses a hot wire, a neutral wire, and a ground wire. If multiple devices share a single power line, those devices can have different ground potentials. This creates a problem known …

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Grounding Transformer: Solution To The Ungrounded System?

Introduction: What does one do when the neutral point is not available? As the ungrounded system problems became more apparent to industry, they recognized that ground their delta-connected systems was to their advantage. Some took the approach of purposely grounding one phase. Neutral points are an excellent way to ground an ungrounded delta system because …

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All About Buchholz Relay

What is Buchholz Relay The Buchholz relay is a gas-actuated device that is used to protect against faults in transformers. Buchholz, the inventor of this relay, had originally designed it for incipient faults. This device can be located in the pipe connecting the conservator to the main tank and will give an alarm if there …

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Three Phase Transformers Basics

A three-phase transformer is used to generate and transmit a large amount of power. Three-phase step up and step down transformers are basically used in various fields in the power system network. A transformer can be formed by joining three separate single-phase winding in a suitable way. Such an arrangement is called 3-phase bank of …

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