Draw busbars in qelectrotech
Finally I found how to draw a bus.
One way is to make a bus element and then use it.

Making an element is very easy. first select the "new element button and choose the required options.


You can change the size of background from edit menu "size and hotspot"

Now should draw a rectangle and put several terminals on it. to change the orientation of the terminals just select it and from information at left change the orientation. Also add a textfild to beside your element for naming. You can put "bus_" for the default.



After select the save button you can use the element "bus".

You can also save your element to a file from file menu. 

To use your element select it from elements panel and drag it to the drawing area.