Why we use Carbon & graphite mixxed brushes in the DC motor?
Answer Posted / guest
carbon is hard material compared to graphiate so it will
give a stainsail strength of graphite at the time of full
load runing condition.and graphite use for the just collect
the current and passing.
Is This Answer Correct ? | 5 Yes | 6 No |
Post New Answer View All Answers
can anyone send me some sample question regarding power grid corp
what is mean by drives?
How to select the proper VSD to operate high inertial load
Define sensitivity?
A double circuit with dog conductor 66KV Transmission line from wind farm evacuation to feeding substation having capacity of 25MW for transmission. Can same transmission network be considered for further expansion of Power & how much in MW. If we need to expand next 10-15 MW more will there any augmentation is required in transmission network? Kindly reply asap.
how can service sitting be setted for MCCB?Example for sittings IR (CURRENT RATING),IS(CURRENT STARTING) I O (current operating)?
Why the efficiency of a three-phase induction is the motor is less than that of a three-phase transformer?
How can I calculate the Mega watts required to run a plant having many electric motors and other electrical components.
What kind of preventive maintenance are there for transformer?
what is the usage of microcontroller in the panel board?
how u measure/calculate renge of capacitor,capacitor has no any rating tag.what is the theory of measure of capacitons.
Why you are switching off arc protection mcb when you are taking shutdown for lv board.
What will happen if we on 200kvr capacitor bank(11kv in bus)If there is low load on transformer (1.5 mva 33/11 kv)
If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?
what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer