Interested to Buy Any Domain ? << Click Here >> for more details...
What is the difference between short circuit and overload
currents?
- 14 Answers
- 62592 Views
- IIIT, I also Faced
- E-Mail Answers
Answer Posted / raghu
Short circuit means the current passing though conductor
by-passes the connected load. This happens when the metal
wires come in contact at an unwanted location, generally due
to failure of insulation. Numerically, the resistance
connected to the circuit becomes nearly zero and thus the
current, i=v/R = v/0 = infinity, causing damage to source,
conductor. A fuse saves the situation by melting due to high
current and the source is disconnected to avoid further damage.
Short circuiting is possible in a circuit (eg: home wiring)
as well as inside a electrical device (eg: motor) in its
internal circuitry.
The term "Overload" may refer to a circuit or a device.
When too many devices are plugged in to a circuit (eg: many
appliances in a single power socket) and if the total
current requirement is much more than the "design current
capacity, (rating)" of the circuit, the circuit is said to
have over loaded. Here also,as in short circuit, current
drawn is high causing damage to circuit or source.
Continuous malfunctioning or faulty working of devices may
cause overload. Due to some specific reasons (over heating,
no-load running, high-load running), the internal circuitry
of the device gets partially short circuited. Hence the
capacity of device gets reduced (as if a half HP pump is
used where 1 HP is required); however, the device continues
with its work at a reduced resistance but with a huge task
at hand. Thus the device is said to have overloaded. The
overloaded device draws high current (due to reduced
resistance) from the circuit and thus causing damage.
Short circuiting is a sudden action/ response (spike in
current) while overloading is a slow process(excess current
is being drawn for a large duration).
| Is This Answer Correct ? | 21 Yes | 6 No |
Post New Answer View All Answers
Define stepper motor. What is the use of stepper motor?
Define transfer function?
How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?
please give some hindalco placement papers for written exam
what r substations?what r there work?why voltages r incresed and then reduced during distribution of power
Mr. mohh sahid m not satisfied for ur answer to the que weather the size of transformer increases or decreases withchange in fr for more detail go to the answer given by me
What is the difference between electronic regulator and ordinary electrical rheostat regulator for fans?
why we use circuit breakers for switching instead of normal switching device?
define digital electronic
Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0
following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?
Why efficiency in thermal power plant is low?
How many size of cable required for a 300m long and 30kw inductive lode
write a c++ code that receives an integer number and display the sum of the number and its revers integer?
