Lecture#15 Testing of Electrical Equipment Advance H v Engg

8/13/2019 Lecture#15 Testing of Electrical Equipment Advance H v Engg.

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Advance High Voltage Engineering

Lecture-12

Prof. Dr. Suhail A. Qureshi

Elect. Engg. Deptt. UET,Lahore.

High Voltage Testing ofElectrical Apparatus


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1.1

High Voltage Testing of ElectricalApparatus


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1.1.1

High Voltage Testing of Electrical Apparatus

Testing of Insulators and Bushings


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Definitions


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DefinitionsTesting of Insulators and Bushings


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Fig: 1 and 2


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Fig:1 Computation of absolute humidity from wet anddry bulb thermometer temperatures


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Fig: 2 Humidity Correction factor.


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1.1.2


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1.1.2 Tests on Insulators


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Power Frequency Tests


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Impulse Tests


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Impulse Tests


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1.1.3

i h l i f l i l


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1.1.3 Testing of Bushings


Hi h V l T i f El i l A


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Hi h V lt T ti f El t i l A t


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1.2

1.2.1



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Testing of Isolators and Circuit Breakers

Introduction



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Introduction

High Voltage Testing of Electrical Apparat s


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1.2.2



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Short Circuit Tests

Fig: 3



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Short Circuit Tests

Fig: 3 Schematic diagram showing basic elements of a shortcircuit testing laboratory.



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Short Circuit Tests

Fig: 4



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Short Circuit Tests

Fig: 4



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Short Circuit Tests


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1.3



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Testing of Cables



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Testing of Cables

Fig: 5 Cable and terminals.



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Testing of Cables

1.3.1

1.3.2



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Testing of Cables

1.3.2 Dlelectric Power Factor Test



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Testing of Cables

1.3.3



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Testing of Cables

1.3.4

7(a)

7(a)

7(b)

6



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Testing of Cables

Fig:7

1.3.4 Partial Discharges

Discharge Measurement



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Testing of Cables



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Testing of Cables



Fig: 8



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Testing of Cables





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Testing of Cables



Fig: 9



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Testing of Cables



Fig: 10



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1.4



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Fig: 11

Fig: 11

1.4.1

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Testing of Transformers



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Fig: 11

Fig: 12

Fig: 13

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Impulse Testing of Transformers



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Fig: 12


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Fig: 13





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Fig: 14


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1.5

1.5.1

Table: 1



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Testing of Surge Diverters


Tests on Surge Diverters



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Testing of Surge Diverters

Tests on Surge Diverters



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1.5.3




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High Current Impulse Test on Surge Diverters



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1.6

1.6.1




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Radio Interference Measu rements

1.6.2




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Fig:15





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Fig: 16





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Fig: 17

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1.6.3

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Test Circuits for the Measurements



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Lecture#15 Testing of Electrical Equipment Advance H v Engg