what is reactive and active power?why we need power factor correction?
Answer Posted / ramendra shukla
Reactive power:- the electrical power component
(impedencei.e. resistive,capacitive, inductive load) which
react on active power of electrical suupy is know as
reactive power and given by; Reactive power = visin phi
Active power:- if the presence of only Resistance component
in the power then it is known as active power or the when
the when the cosin angle diffrence between voltage and
current is zero are in same phase or unity pf then the
multification of vlotage and current is known as active
power i.e. P = VI
To put the voltage and current into same phase or closeby
we need to put APFC or Sych. Motor on our utility to
maintain the PF as unity.
| Is This Answer Correct ? | 4 Yes | 1 No |
Post New Answer View All Answers
what is Insulation monitoring device. where it is used? (in switchgear room or control panel or in field equipment)
what is the function of anti pumping relays? what is KVAR? How it is generated in alternator? What is 3rd Harmonics? What is IDMT relay?
We have 90mX100m hangar with 16 no.of supporting pillar. It is required to provide power supply on all pillars. what is suggested earthing scheme for hangars.
What is the size of a 60 watt and 80 watt tubelight?
what are the advantages disadvantages of connecting high voltage block( 1:1 transformers) transformers between the turbo generators and busbars.
Safety of dry type transformer
Different STANDARDS (BS, IS, IEC etc) gives different informations on CT specification. How they correspons w r t each other (i.e I mean to say BS provides "knee point voltage" but IS does not, then how can i select CT)
During FEED, you will have all the information with regards to cable. How will you calculate the MTO for MV and LV Cables? what are your considerations?
How does a transformer contribute towards the widespread popularity of ac system over dc?
How to back charge the Gas turbine generator
What is the difference between alternator and generator?
Define average demand?
HOW TO CALCULATE THE REGULATION OF 100 AND 25 KVA TRANSFORMER
Q.1:What protection will be used on HT and LT side of 33/0.4 KV, MVA transformer. Indicate capacities of protective device to be used. Q.2:Which types of back-up protections are used in the power transformers? What do you understand by the term over travel in the relay? Q.3:How star and delta connected winding transformer are provided from earth fault
What are the different types of LT Cables?