Why Transformer Rating In kVA, Not in KW?

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Why Transformer Rating In kVA, Not in KW?In Simple words,  There are two type of losses in a transformer: 1. Copper Losses2. Iron Losses or Core Losses or  Insulation LossesCopper losses ( I²R)depends on Current which passing through transformer winding while Iron Losses or Core Losses or  Insulation Losses depends on Voltage. That’s why the Transformer Rating may be expressed in...

Different types of transformer

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Different types of transformerTypes of Transformers:There are two basic Types of TransformersSingle Phase Transformer Three Phase Transformer Below are the more types of transformer derived via different functions and operation etc.Types of Transformers w.r.t Cores:Core Type Transformer Shell Type Transformer Berry Type Transformer Types of Transformer w.r.t uses:Large Power Transformer Distribution...

Introduction to Electrical Transformer

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Introduction to Electrical Transformer What is a Transformer? In Very Simple words. Transformer is a device which: Transfer Electrical power from one electrical circuit to another Electrical circuit. It’s working without changing the frequency. Work through on electric induction. When, both circuits...

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Why we are use 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV this type of ratio?

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Why we are use 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV this type of ratio. Why can’t we use other voltage ratio like 54KV / 99KV etc? When an alternator generates voltage, we always use a multiple of 1.11 because for a pure sine wave the FORM FACTOR is the  ratio of rms value...

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How to choose transformer rating?

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 How to choose transformer rating? When an installation is to be supplied directly from a MV/LV transformer and the maximum apparent-power loading of the installation has been determined, a suitable rating for the transformer can be decided, taking into account the following considerations: The...

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Degradation of Insulation in Switchgear (What’s Really Happening)

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Partial Discharge Partial Discharge (PD) Electrical insulation is subjected to electrical and mechanical stress, elevated temperature and temperature variations, and environmental conditions especially for outdoor applications. In addition to normal operating conditions, there are a host...

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Electrical Switchgear Protection

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Definition of Switchgear A switchgear or electrical switchgear is a generic term which includes all the switching devices associated with mainly power system protection. It also includes all devices associated with control, metering and regulating of electrical power system. Assembly of such devices...

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Maintenance Of Meduim Voltage Circuit Breakers

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Medium Voltage Circuit Breaker Maintenance Of Medium Voltage Circuit Breakers Medium-voltage circuit breakers rated between 1 and 72 kV may be assembled into metal-enclosed switchgear line ups for indoor use, or may be individual components installed outdoors in a substation. Air-break circuit...

ABB – 145kV Compact indoor substation with Disconnecting CB

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ABB – 145kV Compact indoor substation with Disconnecting CB Turnkey 145 kV S/S project for Borlänge Energi, Sweden, emphasizing the advantages of ABB Disconnecting Circuit Breakers. Small footprint enables indoor air insulated Switchgear solutions, increasing the power substation availability and reliability for the customer. As a complement to the basic version of our LTB circuit breakers,...

Why we can’t store AC in Batteries instead of DC?

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Wave form of AC & DC Why we can’t store AC in Batteries instead of DC.or Can we store AC in batteries instead of DC? We cannot store AC in batteries because AC changes their polarity up to 50 (When frequency = 50 Hz) or 60 (When frequency = 60 Hz) times in a second. Therefore the battery...

Basic Electrical Quantities Formulas With Simple Explanation (in DC Circuits.)

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Basic Electrical Quantities Formulas With Simple Explanation (in DC Circuits.) Voltage Current Resistance Power Power Electric power is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second. Current An electric current...

How to Wire a Switch and a Load (a Light Bulb) to an Electrical Supply

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How to Wire a Switch and a Load (a Light Bulb) to an Electrical Supply?  As can be seen in the diagram the wiring is pretty simple. The Phase is invariably applied to one terminal of the switch, the other terminal moves to one of the connections of the load, and the other point of the...

Differences between E.M.F and Voltage (P.d)

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Differences between E.M.F and Voltage (P.d) The following are the difference between E.M.F and P.D. The name E.M.F at first sight implies that it is a force that causes current to flow.But this is not correct because it is not a forced but energy supplied to charge some active device such as battery. E.M.F maintains p.d. while p.d. cause current to flow. When we say that E.M.F of a device...

Suzlon partners Brazil: adding 350 MW of wind energy capacity

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Suzlon Group, the world's fifth largest wind turbine maker has completed installing and commissioning of over 350 MW wind energy in Brazil over a period of 16 months ending Nov 2014 with bulk of 309 MW being added in Calendar Year (CY)2014. This combined capacity includes projects located in...

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