Staticnotes4u Kelvin’s Law: The most economical size of a conductor for a transmission line is one where the annual interest and depreciation on the capital cost of the conductor are equal to the annual cost of energy loss due to the resistance of the conductor. Mathematically, this can be expressed as: Annual Cost of Energy Losses … Read more
The single-phase half-bridge inverter converts DC power to AC power using two switches and two diodes. Components 1. Power Switches: Typically, Thyristors or MOSFETs or IGBTs are used. 2. Diodes: Two diodes (D1 and D2) are placed in anti-parallel with each switch to allow for freewheeling current paths when the switches are off. 3. DC … Read more
Using high voltage for transmitting electricity has many important advantages. Characteristics of high voltage in power transmission lines include
1. Based on Voltage Levels: 2. Based on Current Type: 3. Based on Configuration: 4. Based on Length:
Primary Transmission Lines: Purpose: Primary transmission lines are the backbone of the electrical grid, responsible for carrying bulk electricity over long distances from power plants to substations. Voltage Levels: They operate at very high voltages, typically 66 kV (kilovolts) and above, to minimize energy losses during transmission. Construction: These lines are constructed using robust materials … Read more
Crawling is a phenomenon where a three phase induction motor runs at a speed significantly lower than its synchronous speed
Cogging is when a motor has trouble starting because the rotor gets stuck due to magnetic forces between the rotor and stator teeth.
The main types of Three phase induction motor are Squirrel cage induction motor and Wound rotor or Slip ring induction motor
NAME UNIT RESISTANCE Ohm RESISTIVITY Ohm-meter CONDUCTIVITY Mho/m Or Siemens/m VOLTAGE OR POTENTIAL DIFFERENCE Volt EMF Volt CURRENT Ampere ELECTRONIC POWER Watt ELECTRIC ENERGY Kwh PERMITTIVITY Farad/M ELECTRIC FIELD INTENSITY V/m or N/c ELECTRIC FLUX DESITY C/m2 CAPACITANCE Farad INDUCTANCE Henry MAGNETIC FLUX DENSITY Tesla or weber/m2 MAGNETIC FIELD INTENSITY A/m or oersted or … Read more