Mastering Electrical Transformer Fundamentals Part 4

Dear Hi,

A  transformer is a static machine used for transforming power from one circuit to another without changing the frequency. As there is no rotating or moving parts, a transformer is classified as a static device. Transformer operates on an AC supply. Transformers operate based on the principle of mutual induction.

Power transformers are called heart of power system, they are essential part and required for transmission and distribution of power supply.

I have prepared this course considering theoretical and practical aspects, you will certainly feel the difference when experience professional is delivering the knowledge. This course consist of 164 Video Lectures and total duration of 11 Hours. This is the most comprehensive training online for transformers.

Find below details of topics covered in this training.

Topics covered in Part 1:

1 Transformer Definition and Uses

2 Can transformer increase of decrease power?

3 Do transformer have any rotating part?

4 why high voltages are used to transmit power?

5 do transformer work on dc, if not what are HVDC transformer used in dc transmission?

6 What was decisive weapon in winning war from dc system and prevailing of ac system?

7 DC system is coming back

8 Generation, transmission, distribution network diagram

9 Why rating of transformer is given in KVA not kW?

10 Transformer Symbol

11 Transformer Basic Diagram

12 what are primary and secondary windings?

13 What changes are to be made if the primary and secondary winding?

14 Ferromagnetism, how core act when coil is energized

15 Electric field, Magnetic field, Electromagnetic field

16 Transformer Basic Operating Principle

17 Self Inductance

18 Mutual Inductance

19 Mutual induction n distance of coupling

20 Coupling Coefficient

21 Coupling Factor Between Coils

22 Mutual Inductance Calculation Example No1

23 How transformer works, how secondary current is reflected to primary on load?

24 Do Transformer Change frequency

25 Leakage flux and reactance of transformer

26 Transformer Equivalent Circuit Explained

27 Calculating Voltage  at primary and secondary sides considering reactance and resistances

28 Understanding voltage drop in transformer due to leakage reactance.

29 Magnetic fringing Effect

30 Reduction in hotspot temperature by reducing fringing effect in transformer

Topics covered in Part 2:

31 How to minimize flux leakage

32 EMF Equation of transformer

33 Can 50,60Hz transformers be used interchangeably

34 Power in single n three phase transformer

35 Ideal Transformer

36 Real Transformer

37 Reflected Load in a Transformer

38 Types of Transformer

39 Power and Distribution Transformers

40 Classification of Transformer as per Cooling System

41 Oil Filled, Dry Type Transformer, Self and forced cooling

42 Why Radiators are used in transformer

43 Instrument Transformer

44 Current Transformer

45 Voltage Transformer or Potential Transformer

46 Zig Zag Transformer

47 Step Up and Step Down Transformer

48 Isolation Transformer for Safety and reduce voltage spikes

49 Single Phase and Three Phase Transformer

50 Power Vs Auto Transformer

51 Theoretical Vs Practical Transformer

52 Winding arrangement in transformer, concentric, sandwich or pancake

53 Core Type and Shell Type Transformers

54 Type of wire used in transformer

55 Core Stepping or Cruciform

56 Feature most important for transformer design

57 Transformer Voltage Regulation

58 Transformer Efficiency and all day efficiency

59 Do high voltage regulation transformer are better

60 Relationship between Voltage regulation n Z of transformer

Topics covered in Part 3:

61 Losses in Transformers

62 Eddy Current Loss

63 Transformer Core Requirements

64 Transformer without core laminations

65 Air Gap Cored Transformer

66 Hysteresis Losses

67 Copper Losses

68 Losses Due to Magnetic leakage, Stray Losses

69 Measures to reduce losses in transformer

70 Which Losses in Transformer are fixed and variable

71 Transformer core Loss Vs Frequency, Flux Density

72 Transformer Core Saturation

73 Over Excitation Protection of Transformer

74 Power transformer design to withstand how much over flux

75 Effect of Over Fluxing in Transformers

76 Transformer Body Earthing

77 Transformer Core and Clamp Grounding

78 Should Transformer Core and Clamp need to be grounded

79 One Vs Several Transformer and Parallels operation of transformer

80 Do Power Transformer be converted to auto transformer

81 Why at least one delta winding is provided in power transformers

83 Interesting Facts about Percentage Impedance of transformer

84 Tesla Coil

Topics covered in Part 4:

85 Parts of Transformer

86 Why Oil is used in power transformers

87 Transformer Polarity

88 How to perform polarity test of transformer

89 Main Tank and Conservator Tank

90 Sealed Tank or hermetically sealed Transformer

91 Silica Gel and Breather

92 Function of Radiator

93 Direction of oil flow in radiator

94 Radiator Thermographic Image

95 Types of Radiators

96 Types of Cooling, Why Two ratings are given at name plate of transformer

97 Which factor is decisive for max loading capacity of transformer

98 What factor effect most for transformer aging

99 Effect of temperature on paper aging

100 Risks when wet transformer is overheated

101 What is soak test and why it is done

102 Why humming sound is observed in power transformer, Magnetostriction Effect

103 When humming sound of transformer is increased

104 Buchholz Relay

105 Where Buchholz relay is installed

106 Buchholz Relay Working Principle

107 Buchholz Functional Check

108 NO contacts of Buchholz Relay

109 Buchholz Bleeding and Test Point

110 Transportation and protection of Buchholz relay contact

111 Buchholz internal, view

112 Directional mark on Buchholz relay

113 Buchholz gas sampling device

114 Buchholz Manufacturer Operating Details

115 Sudden Oil Pressure Relay

116 Oil and Winding Temperature Indicator

117 Oil Level Indicator

118 Pressure Relief Device

119 Bushing of Transformer and Bushing Test Tap

120 Moisture is worst enemy of bushing

121 Periodical Check and maintenance of the bushing of transformer

122 HV Bushing Inspection glass

Topics covered in Next parts:

123 Creepage Distance, Clearance Distance and arcing horn

124 HV bushing maintenance

125 Rupture Disc

126 Sudden Oil Pressure Relay

127 Tap Changers Types and requirements

128 Make before break patent of onload tap changer by Dr Janson 1927

129 Tap Changer Winding Arrangements

130 Off load tap changer

131 On Load Tap Changer

132 On Load Tap changer Working

133 OLTC Sequence of operation in detail

134 OLTC General Arrangements

135 What is the basic difference between Transition Resistance and Reactor type

136 What are the advantages of vacuum type OLTC

137 What preventive maintenance, measures can be used for improvement in life

138 Tie In Resistor in Tap Changer

139 Tap Changer Design Methodologies

140 Tap Changer Animation

141 Air Bleeding in Transformer

142 Test Performed On Transformer

144 Transformer Turn Ratio Test

145 Purpose Transformer Open circuit and short circuit test

146 Transformer Open Circuit Test

147 Short Circuit Test of Transformer

148 Impedance Test of Transformer

149 C and DF or Tan Delta Test of transformer

150 How to Predict the Result of Tan Delta Testing

151 Sweep Frequency Response Analysis Test

152 DC winding Resistance Test

153 Transformer Demagnetization after Winding Resistance Test

154 Going Through Transformer FAT Report

155 Transformer Name Plate

156 Transformer General Arrangement Drawing

157 Vector Group and Clock Method

158 How to draw winding connection if you know vector group

159 Testing Vector Group By Voltage Method

160 Transformer Troubleshooting

161 Preventive Maintenance of transformer

162 How Transformers are transported

163 Corona Rings at transformer bushing

164 Transformer Fire Protection System

Regards

Elite Engineering