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Armature Reaction in DC Generator
01/09/2014
To understand the concept of armature reaction in DC generator, please go through the previous articles describing the construction of
Power Transformer Testing Methods – Type, Routine & Special Tests
29/08/2014
An electrical power transformer has to go through a number of transformer testing procedures for confirming its specifications and performances.
Why Transformers are Rated in kVA, Not in kW? (With Proof)
22/08/2014
Discover exactly why transformers are rated in kVA rather than kW. Learn how core and copper losses dictate a transformer’s thermal limit, explore the mathematical proof behind changing load power factors, and master this classic electrical engineering interview question.
Characteristics of DC Compound Generator
19/08/2014
In a compound generator, both series and shunt excitation are combined as shown in the figure. The characteristics of DC
Insulation Resistance Test (IR Test) or Megger Test
16/08/2014
Insulation Resistance or IR Test is carried out by maintenance engineers to ensure the healthiness of the overall insulation system
Three Phase Transformer Interconnections
13/08/2014
The phase windings of three-phase transformers are interconnected to give a three-phase, three-or four-wire supply through three different modes of
Effects of Voltage and Frequency Variation on Transformers
12/08/2014
The effects of voltage and frequency variation on the transformer is discussed in this article. Usually, power transformers are not
Objective Questions on Alternator | Part 1
12/08/2014
1. In an alternator, voltage drops occurs in (A) armature resistance only (B) armature resistance and leakage reactance (C) armature
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