Why is DC use instead of AC for protection and control
circuits?
Answer Posted / maddoxx
in control and protection ckt very small current is require in relays ,cb etc .The panel is placed far from the work place.so if we use small ac current there may be chance of interference by communiation frquency and signaling it also produces noise which can too interfere in other sognalling freq. so dc current there is no frequency and we can increase the accuracy and sustain the strenth of signal coming to controlling panel.
Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
During underground cabling in landscape area what did we cover the cable with to prevent the electric shock & protect the cable?
what is thresold of perception
Diagram and details of polarity test for Current Transformer 11kv 400/200/100/1A
can any one know is sbi interview based on merit or based on roll number
what will happen if ac and dc supplies given
what is mean by ideal infinite bus? why it is required to consider in fault short circuit calculations?
if 6 earth pit value is 1.5 ohm then what should be the number of earth pit to make the value .8 ohm
What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor
lorteny method
What is the effect of pd controller on system performance?
dear sir, i completed diploma in electrical in 2005, how i can get electrical supervisor liance in mumbai
hwat type of motor is used in thermal gas turbine hydro nuclear power plants and why
we all know voltage is a force(emf), and the force always devides if 2 or more than2 loads are there but why does the voltage remains same is parallel, it must devide na ???
State the methods of improving power factor?
What is meant by bus bar protection?