why two contacts(in series) are using in closing circuit
Answer Posted / k.prakashchandra
You mean 2 contacts are made in series in a MCB? That is to
make doubly sure of opening the circuit.If parallel ,it is
to make closing doubly sure ,as you can expect one of the
contacts to open or close definitely .
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
When a single pase capacitor run motor- run on 230vac and Case(1)run with 8 Mfd 250 vac.capacitor , Case( 2) run with 8 Mfd 400vac capacitor. What is difference between both case regarding power ,efficiency etc?
can any tell me why slope 40% and 80% is calculated in differential protection?
I am having a 1500 KVA transformer whose secondary current is 2086A and my connected load is 1000 KVA, I am having 400 KVAR APFCR for PF improvement what ratio of CT should i install in LT EB Bus to get optimum PF improvement?
Can Anyone suggest the Standards (IEC or IS) for selecting copper current density?
Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?
How many double suspension hardware fittings are required on a double circuit transmission tower?
what could be the RMS value and average value of a 4 phase sine wave?
What is the power factor of a transformer at no load?
can we use trip light with bus coupler?
sir& friends i want the collection of recent quetions asked in interview of top most companies please send me on my email san.jsr@hotmail.com
What is force on parallel conductors ?
typically in power distribution substation. 1- Any idea how would be the graph of capacitor bank consumption verses time through the day . 2- How is the switching ( on and off ) of the capacitor bank, per need?
What are the advantages of stationary armature and rotating field system?
What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor
Define norton equivalent circuit?