Case studies on Method for replacing faulty battery cell in electrical substation
How to replace faulty Battery Cell in Electrical Substation If we want to replace the battery cell named “B”. Now […]
Electrical Substation
Electrical Substation
What is Battery and their charging method in Electrical Substation
Definition In science and technology, Battery is a device that stores chemical energy and makes it available in an electrical
Circuit Breaker
Understand SF6 Circuit Breaker rating parameter
Introduction A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by
Electrical Substation
What is Lightning Arrester(LA) and their Leakage current measurement(LCM) testing
Definition Lightning Arrester (LA)/surge arrester is a protective device used for limiting the affect of surge voltages on the equipment
Case Studies
Case studies on Transmission Line fault due to Bird
In recent power system, Continuity of Power transmission line is most challenging work for every engineer. Different types of fault
Case Studies
Case studies on 220kV Bus fault occurred in humid weather at 220kV Substation
Occurrence At 220kV Substation, 220kV Bus fault occurred at early morning humid weather condition. All line connected to Bus are
Transmission Line
Different types of Protection on Transmission line
Types of Protection on Transmission line Line protection is achieved by following protection system: Distance Protection Over current and Earth
Electrical Substation
Understand Relay and their Logic. What is Numeric relay?
Definition An electric device that is designed to respond to input conditions in a prescribed manner and, after specified conditions
Transmission Line
Earth fault Relay protection in Power Transmission Line
Definition of Earth fault relay Earth fault relay is used to sense ground or earth-faults i.e. L-G faults and L-L-G
Transmission Line
Plug setting (PSM) and Time setting multiplier in Overcurrent protection of Transmission line
Overcurrent relay operates when load current exceeds pre-set value i.e. pick up value. Transmission lines, distribution lines, large power equipment
Transmission Line
Directional overcurrent relay protection in Power system
A radial feeder fed from one end protected by overcurrent relay, fails to maintain uninterrupted supply when circuit breaker near
Transmission Line
What is Directional or reverse power relay and their working and application
Definition Directional feature is realized by comparing the direction of flow of line current with reference to the bus voltage
Transmission Line
Over current protective schemes in Power Transmission/Distribution system
Introduction Power Transmission/Distribution system i.e. radial feeders uses overcurrent protection scheme. Feeder is divided in two or more section and
Electrical Appliance
What is Contactor and their working, types and application
Definition A Electrical contactor is an electrical device which is used for switching an electrical circuit on or off.A contactor
Electrical Machine
Negative phase sequence and stalling and Under voltage protection of induction motor
Negative phase sequence protection of induction motor In case of open circuit fault developed at supply terminal or one pole
Electrical Machine
Short circuit and single phasing protection of induction motor
Short circuit protection of induction motor Short circuit in induction motor occurs either due to winding insulation failure or blocking
Electrical Machine
Faults in induction motor and Thermal overload protection of Induction Motor
Faults in induction motor Small motors i.e. few HP and up to 415 V are protected by starters with inbuilt
Transmission Line
What is Corona effect in transmission line
What is corona ? At higher voltages, the localized high electric fields ionize the air surrounding the surface of the
Interview
Interview question of Electrical Power Transformer
There are a Transformer and an induction machine. Those two have the same supply. For which device the load current
Electrical Substation
What is Power factor and their calculation formula
Definition The Power Factor (P.F.) is a ratio of the real power that is used to do work and the
Electrical Substation
SCADA automation system in electrical substation and power system
Full name of SCADA is Supervisory Control and Data Acquisition (SCADA). Why Power system automation required? To maintain a state
Electrical Appliance
Step for carried out estimate in Home wiring and selection of MCB
Step for carried out estimate in Home wiring Wiring layout: Prepare building plan on a suitable scale and mark electrical
Types of Circuit breaker used in Home and Industries
Circuit breaker play vital role in Home and industries for protection of human and electrical device. Different types of Circuit
Circuit Breaker
Vacuum Circuit Breaker(VCB) and VCB Panel in Detail
11kV Vacuum Circuit Breaker (VCB) Panel Design It’s metal parts divided into below comparnmet: Circuit breaker compartment. Busbar compartment. Cable/C.T.
Renewable Energy
How to test Solar panel using different meter
Solar panel testing is important for take proper output power.For maximum output from solar panel, different types of parameter testing
Transformer
Key action taken while transformer trip or alarm in Buchholz and PRV and OTI/WTI
Key action taken while transformer trip in Buchholz The Buchholz relay has two oil-filled chambers with floats and relays arranged
Transformer
What is PRV and OSR relay of Transformer
Full name of PRV and OSR Full name of PRV is Pressure relief valve Full name of OSR is Oil
Transformer
Procedure for Maintenance and Periodic Inspection of Transformer
Types of maintenance Breakdown maintenance As the name implies the maintenance is carried out when the equipment fails.For costly equipment
Trending
Smart grid in Electrical power system
Introduction Electricity is now becoming the 4th basic necessity of the mankind after food, clothes & shelter. Its demand/consumption is
Electrical Machine
DC Machines Working and Construction
Introduction of DC Machines The DC machine can be classified into two types namely DC motors as well as DC