for selection of transformer we will considering 5 to 6
times of starting current of higher rating motor connected
to secondary side. according to process wise we will start
the motors gradually suppose if we will start 15 to 20
motors at a time wat will happen?
Answer Posted / wareagle
If you start all of the motors at the same time then you
will have the sum of the lock rotor amps time the number of
motors occurring at the same time. You may trip the primary
transformer breaker.
| Is This Answer Correct ? | 4 Yes | 0 No |
Post New Answer View All Answers
What is thresh hold value of current?
how to calculate mf when meter and cTPT detail are given
What type of fittings and electrical accessories can be install in radiation area ?
what is transient stability analysis means?
How to calculate the copper in HT motors if KW, RPM & Voltage is given
why and where we use early make & late break contacts in protection?
how does it help for selection of a transformer.
what is meant by vector group of a transformer? How can it be derived?
How to protect a Dosing pumps/any sensitive equipment (single phase) from surge protection inside a food factory.
Refernce currents are to be generated using refernce cueernts how can this be done??
what is the current density of copper & alluminium.
Define characteristics impedance?
which connection is safer series or parallel?usually which connection we prefer at home?
Explain and give examples about VCB?
a 230v transformer with step down ratio 19:1.it has 2000turns on primary and rated 25va calculate max primary current no of secondary turns volts/turn