Comprehensive Guide to Lighting Technology, Electrical Switchgear, and Transformer Systems

General Classifications of Lamps
- General Service Lamp
- Spotlamp
- Low-energy Bulb
- LED (Light Emitting Diode)
Incandescent Lamp
- This lamp produces light by the process of heating a filament.
Common Types of Discharge Lamps in Industrial Applications
- Mercury Vapour Lamp
- Sodium Vapour Lamp
- Metal Halide Lamp
- Halogen Lamp
- LED (Light Emitting Diode)

Essential Definitions
- Glare: This is the sensation experienced when the level of light within our visual field is brighter than the level to which our eyes can adapt.
- Efficiency: Defined as the lamp light output measured in lumen per watt.
- Luminaire: An enclosure specifically designed to redirect and diffuse light.
- LUX: The unit used to measure illumination.
- Candela: The SI unit of luminous intensity.
- Lumen Output: A measurement represents the total quantity of visible light emitted by a light source.
- Wattage: A measurement of how much energy a bulb is consuming.
- Foot-candle: This represents the original measuring system used for light.
- Luminous Flux: The total light output from a source.
- Luminous Intensity: The light emitted by a source in one specific direction.
Measuring Instruments
- Lux Meter: An instrument utilized to measure the brightness of a light in lux units.
Mathematical Formulas
- Illuminance Calculation: $E = \frac{I}{d^2}$
- Foot-candle Calculation: $\text{Footcandle} = \frac{\text{Candela}}{\text{height of room}}$

Emergency Lighting
- Its purpose is to illuminate an area in the event of a power outage or a fire.
Color Lighting Chemistry
- Oxygen: Produces Blue light.
- Neon: Produces Red light.
- Mercury: Produces Bluish light.
Stroboscopic Effect
- A phenomenon that causes running equipment to appear as if it is stationary.

System Abbreviations and Nomenclature
- MLVP: Main Low Voltage Panel
- MDB: Main Distribution Board
- SDB: Sub – Distribution Board
- DB: Distribution Board
Switchgear Fundamentals
- Definition: An assembly of devices used to control, isolate, and protect electrical equipment.
- Main Components of Switchgear:
  1. Switches
  2. Circuit Breakers
  3. Fuses
  4. Surge Arrestors
  5. Control Panel
  6. Current Transformer
  7. Protection Relay
Switchgear Classification by Voltage
- Low Voltage Switchgears:
  - Miniature Circuit Breaker (MCB)
  - Molded Case Circuit Breaker (MCCB)
- High Voltage Switchgear:
  - Vacuum Circuit Breaker
  - Air Circuit Breaker
Power Distribution for Large Installations
- Factors that must be considered include:
  1. The rating of the transformer as per the specific load requirements.
  2. The type of earthing system employed.
  3. The type of distribution system used.
  4. The wiring system installed.

Definition of a Fuse
- A fuse is a protective device used specifically to protect against overcurrent.
Fuse Current Capacity
- This is defined as the amount of current a fuse can conduct without interrupting the circuit.

Transformer Construction Types
- Shell Type
- Core Type
- Toroidal
Transformer Categories
- Power Transformer
- Instrument Transformer
- Auto Transformer
- Current Transformer
Transformer Nameplate Information
- Every transformer nameplate should list:
  1. Single phase or three-phase designation
  2. Operating frequency
  3. Type of construction
  4. Kva Power Rating
  5. Type of connection
Operational Definitions
- Step down transformer: A transformer where the secondary voltage is less than the primary voltage. It is designed specifically to reduce voltage from the primary winding to the secondary winding.
- Step up Transformer: A transformer where the secondary voltage is higher than the primary voltage. In this system, the secondary decreases output current for the input and output to keep the system equal.
- Current Ratio: The specific ratio of primary current to secondary current within a current transformer.
Transformer Losses
- Losses occur under two main states:
  1. Load Conditions
  2. No load Conditions