switchgear design

I do not quite understand what you are doing. Are you actually trying to model switchgear you are building from scratch or are you trying to model existing switchgear as a single element of part of an overall system.

The switchgear can generally be broken down into blocks of ideal elements (it's a passive element after all). If you want to get more technical then you can add representative elements of inductance and resistance to simulate internal and external switch bus work. It can get a bit more complicated if you are interested in what happens at the point in time when the switch opens or closes, or if you are interested in magnetic displacement force of conductors and bus work.

Could you explain exactly what you are trying to model and the purpose of the model. Is this a power transmission design or a class project? Just how much detail do you really require? What do you actually mean by single bus bar?

I'm trying to model existing switchgear as a single elements. Example, switchgear consists relay, circuit breaker ext..So the circuit breaker i represent as switch. But other components that are install inside the switchgear i'm not able to represent it. I'm doing this for my research project. I'm currently studing at master level.

For this stage, i just able to show the circuit breaker operation using logic gate (AND, OR) when arcing faults occur inside the switchgear. I have to simulate the aring phenomena inside switchgear. Therefore, i have to represents each elements inside switchgear.

It really depends on the switchgear. Some have arc suppression or quenching systems, some use vacuum or SF6 gas as insulation instead of air. If a simple ideal switch model (taking into account the switch arc due to the inductance and capacitance of the load) is not good enough, then you will need to get more detailed information of the internet regarding the switch type you want to model. If you want a really detailed analysis you would also need to look at specific switches in the current range you are modeling, as the contact construction, size, movement speed, etc will all need to be taken into consideration if you want to model the switching element under arc conditions.

I would suggest looking at switch and/or circuit breaker manufacturer websites for detailed construction and schematic data sheets on these components you want to model. Also look up switch arcing for a more details on what switch arcing is, as it should help you understand better what you need to model.

Do you know what type of switchgear you want to model? If you don't, do you at least know the voltage, current and application? Perhaps we can point you in the right direction to some data that would help you better understand what you need to think about with regard to modeling it.

Hello,

You can design you system/Board and implement exsisting CBs available. Designing a switchgear itself is not an easy task. It requires choosing the material, type of extingiushing the arc, retad current, short circuit current rating, type of Curve you adopt.

In addition to the above type tests needs to be done.

Regards,

N.Suresh

Be sure to use an Electrica Safety Standard in your design. In general, that would be 60947. (UL, EN, IEC). Almost anywhere you would install switchgear, there will be questions with regards to Safety certification, either by a facility safety manager, or a government inspector.

So Sir ,

You need to represent CB in MATLAB Simulation alongwith Technical factors . Though I Don't know , Persons of your near place in link with MATLAB or ORKUT Community for MATLAB could make this easier to you . Seems to be a kind of Handling Procedure -only if I am with your commitment .