Electrical Notes
Notes on Electrical Engineering:
All Notes ,Calculations & Abstracts are Based on Some Electrical References. All References are mention at end of
each Notes.
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Electrical Calculation Sheets:
(1) Cable:
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Calculation of Cable Tray Size
Calculate Cable Trunking Size
Calculate Conduit Size for Wire / Cables
Calculate Cable Size and Voltage Drop
(2) Panel / Bus bar / Relay:
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Calculate Size of Bus bar & Panel Design
Calculate IDMT over Current Relay Setting (50/51)
Calculate TC Size & Voltage Drop due to starting of Large Motor
Calculate Size of Solar Panel
Calculate Size of Main ELCB/ Branch MCB of Distribution Box
(3) Transmission / Distribution / Transformer:
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culate Size of Circuit Breaker/ Fuse for Transformer (As per NEC)
Calculation Short Circuit Current (Base KVA Method)
Calculate Technical Losses of Transmission / Distribution Line
Calculate Voltage Regulation of Distribution Line
(4) Earthing / Lighting Protection:
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Calculate Numbers of Plate/Pipe/Strip Earthings (Part-3)
Calculate Numbers of Plate/Pipe/Strip Earthings (Part-2)
Calculate Numbers of Plate/Pipe/Strip Earthings (Part-1)
Calculate Lightening Protection for Building / Structure
Calculate Size of Neutral Earthing Transformer (NET)
Calculate Size of Circuit Breaker/ Fuse for Transformer (As per NEC)
(5) Illumination / Street Light / Flood Light:
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Calculate Size of Pole Foundation & Wind Pressure on Pole
Calculate Street Light Pole’s Distance / Fixture Watt / Lighting Area
Calculate No of Street Light Poles
Calculate No of Lighting Fixtures / Lumen for Indoor Lighting
Calculate Lighting Fixture’s Beam Angle and Lumen
Simple Calculation of Flood Light, Facade Light, Street Light & Signage Light-(Part-2)
Simple Calculation of Flood Light, Facade Light, Street Light & Signage Light-(Part-1)
Calculate Voltage drop for Street Light Poles
(6) Motor:
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Calculate Size of Cable for Motor (As NEC)
Calculate Size of Contactor, Fuse, C.B, Over Load Relay of DOL Starter
Calculate Size of Contactor / Fuse / CB / OL Relay of Star-Delta Starter
(7) Others:
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Calculate Motor Pump Size
Calculate Size of Capacitor Bank / Annual Saving & Payback Period
Calculate Size of Diesel Generator Set
Calculate Size of Inverter / Battery Bank
Calculate Required Air ventilation and Heat generation of D.G Set
Calculate Size of Ventilation Fan
Calculate Size of Pole Foundation & Wind Pressure on Pole
Electrical Notes:
(1) Motor & Starter
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Star-Delta Starter
Direct On Line Starter
Motor Name Plate Terminology
Overload Relay Size & Contactor for Starter
Abstract of NEC:430 for Size of Cable for Single or Group of Motors
Standard Electrical Motor Connections
(2) Transformer:
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Parallel Operation of Transformer
Vector Group of Transformer
Auto Transformer Connection
Scott-T Connection of Transformer
Zig-zag Connection of Transformer
Star-Delta Connection of Transformer
Delta-Star Connection of Transformer
Delta-Delta Connection of Transformer
Star-Star Connection of Transformer
Various Routine Test of Power Transformer-(Part-4)
Various Routine Test of Power Transformer-(Part-3)
Various Routine Test of Power Transformer-(Part-2)
Various Routine Test of Power Transformer-(Part-1)
Abstract of over current Protection of Transformer (NEC 450.3)
Safety Clearance for Transformer
Abstract of National Electrical Code for Transformer’s Protection
Difference between Power Transformer and Distribution Transformer
Type & Selection of Current Transformer
Transformer
Minimum Acceptable specification for Metering C.T
(3) Lighting Luminars:
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Difference Between High Bay-Low Bay and Flood Light Fixture
What should you know before buying LED Bulbs (Part:3)
What should you know before buying LED Bulbs (Part:2)
What should You know before buying LED Bulb (Part:1).
Selection of Street Light Luminar-(Part-6)
Selection for Street Light Luminar-(PART-5)
Selection for Street Light Luminar-(PART-4)
Selection for Street Light Luminar-(PART-3)
Selection for Street Light Luminar-(PART-2)
Selection for Street Light Luminar-(PART-1)
Different Types of Lamps
What is Fixture’s Beam Angle & Beam Diameter (Part-2)
What is Fixture’s Beam Angle & Beam Diameter (Part-1)
(4) MCB / MCCB / Fuse / Relay:
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What is Correct Method of MCB Connections
Setting of overload, Short circuit & Ground Fault Protection of MCCB (PART-1)
Setting of overload, Short circuit & Ground Fault Protection of MCCB (PART-2):
Type of Tripping Mechanism of MCB / MCCB-(Part-1)
Type of Tripping Mechanism of MCB / MCCB-(Part-2)
Type of Light Bulb base & Socket (Part-1)
Type of Light Bulb base & Socket (Part-2)
How to select MCB / MCCB (Part-1)
How to select MCB / MCCB (Part-2)
How to select MCB / MCCB (Part-3)
Selection of 3P-TPN-4P MCB & Distribution Board
Difference Between MCB/MCCB/ELCB/RCCB
Type & Selection of Fuse
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Specification for Re wirable Cut Out Fuse Unit
Over Current Relay(Type-Application-Connection)
Types and Revolution of Electrical Relays
Working Principle of ELCB and RCB
(5) Earthings
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Difference between Bonding, Grounding and Earthing
What is Earthing
Single Earthed Neutral and Multi Earthed Neutral.
(6) Cables:
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Cable Construction & Cable Selection-Part:4
Cable Construction & Cable Selection-Part:3
Cable Construction & Cable Selection-Part:2
Cable Construction & Cable Selection-Part:1
Cable Tray Size as per National Electrical Code-2002. Article 392
Difference between Unearthed Cable & Earthed Cables
Type of Gland
Gland Size Selection
EHV XLPE – Current Rating
XLPE Cable-Current Rating
PVC Cable-Current Rating
EHV/HV Cable Sheath Earthing
Low Voltage and High Voltage Cable Testing
HIPOT Testing
Type of Cable Tray.
(7) Power Factor Correction / Harmonic:
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Automatic Power Factor Correction
Harmonics and It’s Effects
(8) Power Distributions & Transmissions:
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Vibration Damper in Transmission Line
Total Losses in Power Distribution and Transmission Lines-(Part 2)
Total Losses in Power Distribution & Transmission Lines-(Part 1)
Size and Location of Capacitor in Electrical System-(Part 2)
Size and Location of Capacitor in Electrical System-(Part1)
Impact of Floating Neutral in Power Distribution
Effects of High Voltage Transmission Lines on Humans and Plants
Analysis the Truth behind Household Power Savers
Types of Neutral Earthing in Power Distribution Systems
Type of Electrical Power Distribution systems
11KV/415V Overhead Line Specification as per REC
Power Quality
Ferranti Effect in Transmission Line
What is Corona Effect in Transmission Line
How Reactive Power helpful to maintain a System Healthy
Types of Overhead Conductors
Guideline to Design Electrical Network for Building / Small Area.
Demand Factor-Diversity Factor-Utilization Factor-Load Factor
Effects of unbalanced Electrical Load (Part:2)
Effects of unbalanced Electrical Load (Part:1)
(9) Lighting Arrester / SPD:
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Lighting Arrester
Selection of Surge Protective Device (SPD)- (Part 4)
Selection of Surge Protective Device (SPD)- (Part 3)
Selection of Surge Protective Device (SPD)- (Part 2)
Selection of Surge Protective Device (SPD)- (Part 1)
(10) Inverter / UPS:
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What is Difference between UPS & Inverter
Selection of Various Types of Inverter-(Part-1)
Selection of Various Types of Inverter-(Part-2)
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Selection of Various Types of Inverter-(Part-3)
Selection of Various Types of UPS (Part-1)
Selection of Various Types of UPS (Part-2)
(11) Others (Electrical):
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Electrical Thumb Rules-(Part 1).
Electrical Thumb Rules (Part-2)
Electrical Thumb Rules-(Part-3)
Electrical Thumb Rules-(Part-4)
Electrical Thumb Rules-(Part-5)
Electrical Thumb Rules-(Part-6)
Electrical Thumb Rules-(Part-7)
Electrical Thumb Rules-(Part-8)
Electrical Thumbs Rules (Part-9)
Electrical Thumbs Rules (Part-10)
Electrical Thumb Rule-(Part-11)
Electrical Thumb Rule-(Part-12).
Electrical Thumb Rule-(Part-13).
Electrical Thumb Rules-(Part-14).
Electrical Thumb Rules-(Part-15).
Electrical Thumb Rules-Illumination-(Part-16).
Electrical Thumb Rules-Illumination-(Part-17).
Electrical Thumb Rules-Illumination-(Part-18).
Electrical Thumb Rules-Illumination-(Part-19).
Electrical Thumb Rules-Illumination-(Part-20).
Electrical Thumb Rule- High Rise Building (As per NBC)
IP Rating for Electrical Enclosure
Pirating of Technical Works.
Safety Clearance for Electrical Panel
Electrical Safety Clearance (Part-6)
Electrical Safety Clearance (Part-5)
Electrical Safety Clearance (Part-4)
Electrical Safety Clearance (Part-3)
Electrical Safety Clearance (Part-2)
Electrical Safety Clearance (Part-1)
Insulation Resistance (IR) Values of Electrical Equipment
Sub Station Abstracts
Tampering Methods of Electrical Energy Meter.
Minimum Electrical Clearance.
Electrical Clearance in Substation.
Typical Limiting Values of Substation Equipments.
Standard Makes for Electrical Equipments
Electrical Energy Saving Tips
(12) HVAC:
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Quick Reference -HVAC
Thumb Rules-VENTILATION & CEILING FAN
(13) Fire Fighting:
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Quick Reference-Fire Fighting (Part-1)
Quick Reference-Fire Fighting (Part-2)