Alternating Current (Part 4)
9:27 AM
61) What is star connection? ANSWER) Three windings have six terminals. Three terminals are connected at a common point called star point ...
Alternating Current (Part 3)
8:11 AM
41) What is the amount of power in AC circuit? ANSWER) P = VI cosφ in a single phase network where φ is the angular displacement between ...
Alternating Current (Part 2)
1:15 AM
21) How is peak value related to average value? ANSWER) I ave = 0.637 I max 22) What is an instantaneous value? ANSWER) It is the valu...
Alternating Current (Part 1)
10:18 AM
1) What is an alternating current? ANSWER) The current whose magnitude undergoes a definite cycle of change during a definite interval of ...
Current Transformers (CTs)
9:50 AM
Introduction Current Transformers (CTs) are instrument transformers that are used to supply a reduced value of current that can be handled...
Cables sizes used in electrical power systems
7:43 AM
MM SQ AWG 1 17 1.5 16 2.5 14 4 12 6 10 10 8 ...
HRC (high rupturing capacity) fuse
4:25 AM
In HRC fuse (high rupturing capacity fuse) the fuse wire or element can carry short circuit heavy current for a known time period. If the f...
Current Transformer CT Testing
10:46 PM
Lets consider the CT installed in the panel of an 11kV feeder. Following are the routine maintenance tests performed for a CT: 1. Continuit...
SI (Systeme International) system of units
9:07 AM
The International System of Units or SI system abbreviated from its french name Systeme International is a system of units adopted by ...
Difference between circuit breakers and disconnectors
6:19 AM
Circuit breakers and disconnectors are both used for electrically isolating circuits from power source but there are two major differences ...
Disconnectors
10:33 AM
A disconnector (also known as disconnect switch or isolator ) is a switch used to manually cutoff a circuit from power source for purpose ...
Circuit Breakers
7:18 AM
Introduction A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused ...
XLPE insulated cable vs PVC insulated cable - Which one to choose
6:27 AM
PVC (Polyvinyl chloride) and XLPE (Cross-linked polyethylene) are types of plastic used as insulation in power cables. Both have their ad...
Transformers
3:43 AM
Definition Transformer is a device that is used to change the voltage level of AC electric power through action of magnetic field. Freque...
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Lets consider the CT installed in the panel of an 11kV feeder. Following are the routine maintenance tests performed for a CT: 1. Continuit...
-
Introduction Current Transformers (CTs) are instrument transformers that are used to supply a reduced value of current that can be handled...
-
61) What is star connection? ANSWER) Three windings have six terminals. Three terminals are connected at a common point called star point ...
-
41) What is the amount of power in AC circuit? ANSWER) P = VI cosφ in a single phase network where φ is the angular displacement between ...
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Lets consider the CT installed in the panel of an 11kV feeder. Following are the routine maintenance tests performed for a CT: 1. Continuit...
-
Introduction Current Transformers (CTs) are instrument transformers that are used to supply a reduced value of current that can be handled...
-
61) What is star connection? ANSWER) Three windings have six terminals. Three terminals are connected at a common point called star point ...
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