Types of tests in power system according to IEEE Standard
Application certification type tests in the factory or laboratory The objective of application certification type tests (also known as functional […]
Electrical Substation
Transformer
Transformer IDMT, Differential and all Relay setting calculation
Differential Relay Setting Power transformer rating = 30 MVA Voltage Ratio = 33/66 kV Rated voltage (in kV) HV side
Electrical Machine
Induction motor as a generalized transformer
Transformer is a device having two windings which are magnetically coupled & when one winding is excited by AC supply
Electrical Machine
What is Back EMF in DC Motor and their Significance
Back EMF in DC generator In generator, when a conductor cuts the magnetic flux, an EMF gets induced in the
Circuit Breaker
MCCB circuit Breaker and their application
MCCB full name MCCB-Moulded Case Circuit Breakers Difference between MCCB and MCB MCCBs have higher fault current withstand capacities compared
Electrical Substation
What is Tan delta cable testing
What is Tan Delta testing of Cable? Tan Delta, also called Loss Angle or Dissipation Factor, is a diagnostic method
Case Studies
Use of impedances in the electrical network-Shunt Reactor
When electrical energy transmission methods were used, it was noted that if the voltage is sent by, for example, 100
Electrical Machine
Motor Nameplate details explanation
Nameplate information for all NEMA(National Electrical Manufacture Association) motors Manufacturer There is no defined design for this field, and it
Electrical Substation
Current transformer (CT) winding arrangement
Several Current transformer CT winding arrangements are used. These are described in the following sections. Wound primary type This type
Electrical Substation
Time and Current grading of Overcurrent Relay
Among the various possible methods used to achieve correct Overcurrent relay co-ordination are those using either time or overcurrent, or
Electrical Substation
Basic of Alternating Current(AC) and detail overview
What is Alternating Current(AC) ? Alternating current is the rate of flow of electrical charge through a conductor. I =
Electrical Machine
Starting Method of squirrel cage Induction Motor
Introduction At start the squirrel cage induction motor is just like a transformer with short-circuited secondary and, it will draw
Electrical Machine
What is Crawling and Cogging of Induction Motor
What is Crawling? It is observed that induction motors, particularly the squirrel-cage type, some-times exhibits a tendency to run stably
Electrical Machine
Speed control of Induction Motor
The speed of an induction motor is given as N = 120f/p (1-S). So obviously the speed of an induction
Electrical Appliance
LED Lamp: Technologies, Types and their Applications
What is an LED? LEDs are semiconductor diodes, electronic devices that permit current to flow in only one direction. The
Transformer
Overhauling of Power Transformer in power system
Steps for Transformer overhauling Overhauling of transformer is required either due to ageing of transformer or due to fault of
Renewable Energy
Solar Power plant: Components, Installation, Site survey and Evaluation
Solar plant system components The four major components of a solar energy system are the panels, inverter, racking and solar
Electrical Substation
What is Tripping circuit and Trip circuit Supervision relay
Tripping Circuit There are three main circuits in use for circuit breaker tripping: Series sealing Shunt reinforcing Shunt reinforcement with
Electrical Machine
Capacitor Start and Capacitor Start Capacitor Run Induction Motor
Capacitor Start Induction Motor The construction of this type of motors is similar to the resistance split phase type. The
Electrical Substation
Protective Relay testing- Type test on Protective Relay
Type tests on Relay Type tests are required to prove that a relay meets the published specification and complies with
Electrical Machine
Start and Stall protection of Induction Motor
What is Start and Stall protection of Motor? When a motor is started, it draws a current well in excess
Electrical Substation
Power line carrier communication (PLCC) in Substation
What is PLCC (Power Line Carrier Communication) PLCC is used for tele-communication, tele-monitoring and teleprotection between electric substations through high
Electrical Substation
Types of Relay used in power system in detail
What is Relay? It is necessary to remove a fault from the power system as quickly as possible for healthy
Trending
Power quality issues of rooftop solar PV plant on LV distribution
Power quality issues of Rooftop Solar PV Voltage flicker Variation of input voltage sufficient in duration to allow visual observation
Renewable Energy
Solar Collector: Definition, Types and Flat plate Solar collector
What is Solar collector? Sun’s heat energy is a diffuse energy. It is always first collected and then concentrated. In
Electrical Substation
What is Flexible Alternating Current Transmission and FACT device
What is Flexible Alternating Current Transmission or FACTs FACTS as they are generally known, are new devices that improve transmission
Transmission Line
Types of Faults and analysis in Power system
Fault in Power system A fault in a power system or circuit is a failure which interferes with the normal
Transformer
Scott-T Transformer: working , Diagram and Application
Scott Connection of Transformer The Scott connection, also known as the Scott-T transformer connection, is a circuit that enables the
Transmission Line
HVDC Transmission: Types of HVDC link and components
Introduction Electric power transmission was originally developed with direct current. The availability of transformers and the development and improvement of
Electrical Appliance
What is Energy meter or Watt hour meter and their construction and diagram
Energy meter or Watt hour meter Single phase induction type energy meter is also popularly known as watt-hour meter. This