Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...


What is ics,icu,icw of load breaker

Answers were Sorted based on User's Feedback



What is ics,icu,icw of load breaker..

Answer / mike evans

Circuit breakers are designed with withstand short circuit
currents for a short period of time, defined as Icw for a
period of 1 second. This is designed to guarantee
selectivity of breakers and other devices providing short
circuit current protection. The ultimate breaking capacity
of the breaker is the highest symmetrical short circuit
fault current that the breaker is designed to break, and the
breaker manufacture is required to guarantee this level of
performance for one time only. Ics or service breaking
capacity must be guaranteed at least 3 times.
Realistically, the value of Icu is not practical when
considering fault calculations in a distribution system, and
often manufacturers aim for achieving Ics=Icu.

Is This Answer Correct ?    146 Yes 26 No

What is ics,icu,icw of load breaker..

Answer / ravikumar varatharaj

Icu - ultimate short-circuit breaking capacity
a breaking capacity for which the prescribed conditions according to a specified test sequence do not include the capability of the circuit-breaker to carry its rated current continuously
Ics - service short-circuit breaking capacity
a breaking capacity for which the prescribed conditions according to a specified test sequence include the capability of the circuit-breaker to carry its rated current continuously
Icw - rated short-time withstand current
The rated short-time withstand current of a circuit-breaker is the value of short-time withstand
current assigned
Icm - short-circuit breaking (or making) capacity
a breaking (or making) capacity for which the prescribed conditions include a short circuit

Is This Answer Correct ?    39 Yes 9 No

What is ics,icu,icw of load breaker..

Answer / tad rybak

To my understanding Icm stands for Short Circuit Making
Capacity.
According to standard IEC 947-2 or BS EN60947, etc.
It is equal to 2.2 x Icu, where Icu means Ultimate breaking
capacity.

Is This Answer Correct ?    53 Yes 31 No

What is ics,icu,icw of load breaker..

Answer / sagar

plz explain with exampie i cant understand

Is This Answer Correct ?    1 Yes 0 No

What is ics,icu,icw of load breaker..

Answer / vyara

Ultimate or rated short-circuit breaking capacity
(Icn - EN 60898)
A breaking capacity for which the prescribed conditions,
according to a specified test sequence do
not include the capability of the MCB (Miniature Circuit
Breakers) to carry 0.96 times its rated current for the
conventional time.
Ultimate short-circuit breaking capacity
(Icu - EN 60947-2)
A breaking capacity for which the prescribed conditions,
according to a specified test sequence do
not include the capability of the MCB to carry its
rated current for the conventional time.
Service short-circuit breaking capacity
(Ics - EN 60898)
A breaking capacity for which the prescribed
conditions according to a specified test sequence
include the capability of the MCB to carry 0.96
times its rated current for the conventional time.
Service short-circuit breaking capacity
(Ics - EN 60947-2)
A breaking capacity for which the prescribed
conditions according to a specified test sequence
include the capability of the MCB to carry its rated
current for the conventional time.

Is This Answer Correct ?    19 Yes 20 No

Post New Answer

More Electrical Engineering Interview Questions

What is the difference between shortcircuit current, rated current of cable & MCB with example? What will be the size of cable required for 5.5 KW motor (Full load current 10 Amps approx.), Starting current with DOL is 120 Amps. Aprrox. Short circuit current with LLLG fault is 2000 Amps Approx.

0 Answers  


WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION

0 Answers  


I have 200 KVA Isolation Transformer for UPS input side. & ups was having 48% load, suddenly got short what will be the reason.

1 Answers   Mukand,


How to work meggar?

0 Answers   Anand I-Power,


can we use ACB for HT supply

2 Answers   Reliance,






Why field rheostat is kept in minimum position while armature rheostat at maximum position?

0 Answers  


For a Potential Transformer(PT), the primary neutral terminal must be grounded before energization. Why....? What will be heppend if we energize the PT without grounded the primary neutral point? Why..........?

2 Answers  


What will happend if given Vfd out put to step up transformer

0 Answers  


What is the use of lag compensator?

0 Answers  


how can i determine the gear ratio for a rack and pinion system if an electronic gate operated by an electric motor is to travel a distance of 5meters in 15 seconds.

0 Answers  


why do we provide metallic enclosure to bus duct and then ground it?

1 Answers  


what is the resistance value of earthing pit and why they are connected?

6 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5081)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4448)
  • Electrical Engineering Interview Questions Electrical Engineering (16620)
  • Electronics Communications Interview Questions Electronics Communications (3915)
  • Chemical Engineering Interview Questions Chemical Engineering (1093)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (214)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (258)
  • Instrumentation Interview Questions Instrumentation (2994)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (123)
  • Power Plant Engineering Interview Questions Power Plant Engineering (171)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (0)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)