What is C curve and D curve of MCB?
Answers were Sorted based on User's Feedback
Answer / nidal rafeeque
Specifically, these curves denotes the instantenous
tripping current, if fault current crosses the designated
mark.
B : 2-5 times the rated current.
C: 5-10 " " " "
D : 10-15 " " " "
C- curves type are used for heavy currents in normal
working.(e.g. Heaters, Gyesers, Irons)
D-curves types are used for heavy inrush currents.(Motors
etc)
Is This Answer Correct ? | 50 Yes | 7 No |
Answer / antu paul
B,C,D Curves are characterised with instantaneous trimping
current and is as below
for B curve-above3*In-upto and include 5In
for C curve-above5In upto and include10In
for D curve-above 10In upto and include 20In
for Z curve 8In-12In for inductive loads
K curve for semiconducting devices
where In is the rated current of MCB.
Is This Answer Correct ? | 18 Yes | 8 No |
Answer / raja
These curves denotes the instantaneous value of current
C curve is 5-10 times of rated current and D curve is 10-15
times of rated current.D is normally used with motor.
Is This Answer Correct ? | 1 Yes | 0 No |
Why single phase induction motors are not self starting ?
what is meant by CT burden = 10 VA?
what happens when you connect a.c and d.c supplies
How do we calculate the out Put voltage of generator, after excitation being given?
What are your personal skills and abilities for such a Master Course and your possible preparation to undertake this course?
what is PID control in VFD drives?
3- What is the target from Zero Impedance, Single Phase Imp., S/C Imp. and magnetic balance tests?
If the supply voltage is same (say 440V) whether a system designed for 60 Hz frequency will work with 50 Hz frequency or not , if so pl. give clarification.
DISCUSS THE SHAFT MOUNTED D.C. GENERATOR ,BASED ON EXCITATION SYSTEM IN ELECTRICAL SYSTRM
How to design power source say 5KW i/p :415v 3 ph, o/p 5KW constant, variable currnt and variable volatge 10-230v,
What is HVAC, PLS SEND DETAIL OF hvac.
please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house