Single Line Diagram

For most practical uses, you could source each of the two systems from a separate MCCB.

As an alternative, you could source them from two different power systems (e.g., Hoover Dam and 3 Mile Island, with transmission lines, etc.) if the need to avoid influence is important enough.

With respect to feeding the two systems each from a separate MCCB, you need to have a well designed system, with an incoming MCCB and proper coordination between the incoming (i.e., main) MCCB and the outgoing MCCBs so that the system is selective. (That is, a fault on one system won't trip the incoming MCCB thus interupting power to both loads.)

It is usually easier (and cheaper) to obtain that kind of coordination / selectivity with properly chosen fuses as opposed to MCCBs.

Can you provide me with a simple single line diagram for my clear view? Just for reference.

Sorry, I don't have an easy means to create a one-line diagram. Maybe somebody else has an example.

It seems fairly simple to me (ignoring details ;-) --one incoming feed, two outgoing feeds, a breaker (or fuses) protecting the incoming feed, other breakers (or fuses) protecting each of the outgoing feeds. Everything chosen for proper selectivity.

let says one source but two systems (CCTV and Traffic light) how to separate so that when one of the system trip, the another system would be influenced or affected?

Is this really what you meant to say?

Yes, it can be other systems but the most important thing is from one control panel, tapped out for two different systems and made coordination so that they wouldn't affect each other.

Look, you do not seem to have the basic electrical knowledge that is required for the solution required, consult a local electrician and advise him that you want separate circuit breakers for each system, it is that simple all that your need to do is install another circuit breaker to the power supply then run one system on one circuit breaker and the other system on the other circuit breaker.

Its not rocket science mate, it is common sense.

Cheers

Joe

Thanks for your opinion and advise, i understand the concept. Just i want to learn more on how to read the single line circuit diagram and do my own design with the knowledge i learn. Where could i learn more specific for design and drawing single line circuit diagram.