Interested to Buy Any Domain ? << Click Here >> for more details...
Wat is power factor exact meaning in terms of technical
terms plz explain ?
- 4 Answers
- 6330 Views
- I also Faced
- E-Mail Answers
Answer Posted / sachin
Power factor Basics
In all industrial electrical distribution systems, the
major loads are resistive and inductive.
Resistive loads are incandescent lighting and resistance
heating. In case of pure resistive loads,
the voltage (V), current (I), resistance (R) relations are
linearly related, i.e.
V = I x R and Power (kW) = V x I
Typical inductive loads are A.C. Motors, induction
furnaces, transformers and ballast-type
lighting. Inductive loads require two kinds of power: a)
active (or working) power to perform
the work and b) reactive power to create and maintain
electro-magnetic fields.
Active power is measured in kW (Kilo Watts). Reactive power
is measured in kVAr (Kilo
Volt-Amperes Reactive).
The vector sum of the active power and reactive power make
up the total (or apparent)
power used. This is the power generated by the SEBs for the
user to perform a given amount of
work. Total Power is measured in kVA (Kilo Volts-Amperes)
The active power (shaft power required or true power
required) in kW and the reactive
power required (kVAr) are 90° apart vectorically in a pure
inductive circuit i.e., reactive power
kVAr lagging the active kW. The vector sum of the two is
called the apparent power or kVA, as
illustrated above and the kVA reflects the actual
electrical load on distribution system.
The ratio of kW to kVA is called the power factor, which is
always less than or equal to
unity. Theoretically, when electric utilities supply power,
if all loads have unity power factor,
maximum power can be transferred for the same distribution
system capacity. However, as the
loads are inductive in nature, with the power factor
ranging from 0.2 to 0.9, the electrical dis distribution
network is stressed for capacity at low power factors. So
COS PHI= KW/KVA
| Is This Answer Correct ? | 6 Yes | 0 No |
Post New Answer View All Answers
Why is voltage is required to be within permissible range for an electrical equipment?
which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?
What is the method for testing the differential protection stabilty in generator? When the time of starting What will happen if differentail protection connection wrong means?
Sir, I m 3rd year student 4m DCE and want to do internship in siemens or l&t or any other mnc related to electrical engineering. please tell me the procedure 4 same and oblige me
what is interfacing in computer studies?
sir iam a 3rd yr eee student.no core company comes for recruitment to our college.my aim is to be placed in l and t.tell me the procedures.
What is class ab operation?
Is any generator is developed which is operated with out diesal or other expensive source?
Installation method of self treated earth electrode.
what will be the min and max voltage flow from neutral to earth?
how oti and wti connections are different from each other?
What is the method to solve circuit using source transformation?
What is the implications when 600 hp motor is started when the unit is running with Transformer of capacity 1500 KVA and DG set of 1000kva
electromechanical relay type identification example : type=tjmh t-stants for j- m- h-
plz tel me syllabus and exam date 4 jr executive engg (electrical)
