If there is a high power factor, i.e if the power factor is close to one:
Losses in the form of heat will be reduced;
The cable becomes less bulky and easier to carry, and very cheap to afford, &
It also reduces over heating of transformers.
...
February 22, 2017
What are the functions of Protective Relays?
Figure: Protective Relaying System
Functions of Protective Relays:
To detect the faults. For Example: Short circuits.
To detect abnormal operating conditions. For example: Overloads, unbalances, low voltage or frequency.
To Initiate the operation of the circuit breaker to isolate the defective element from the rest of the system, thereby protecting the system from damages consequent to the fault.
To Control and supervision....
February 21, 2017
List of Acronyms on Digital Electronics
ACRONYMS ON DIGITAL ELECTRONICS:
ACDS —advanced combat direction system.
ACRO (or CRO)
—auxiliary
cathode readout.
ALT key —alternate key.
A/N
—alphanumeric.
APA —all points
addressable.
AM
—amplitude modulation.
ASCII —American Standard
Code for Information Interchange.
ASTAB —automated status
board.
ASW —antisubmarine
warfare.
BC —broadcast.
BDU
—basic display unit.
BER
—bit error rate.
BITE —built-in test
equipment.
BPS —bits per
second.
C2P
—Command and
Control...
February 20, 2017
What are the Characteristics, Power Ranges and Applications of different types of AC & DC Motors?
Characteristics, Power Range and Applications of some AC & DC Motors:
Motor Types
Characteristics
Power Range
Applications
DC Motors
DC shunt motor
Constant
flux constant speed motor creates moderate torque at start.
Up to 200 hp
Machine
tools like lathes, milling machines, grinding machines, centrifugal and reciprocating
pumps, blowers, and fans.
DC series motor
Creates dangerously high torques at low speeds
and should be always connected to the load; speed can be varied.
...
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