Single bus sub-section for power distribution, transformer with a prepared and dual-use how to understand
One with a preparation: a transformer to run, another cold standby.
Dual use: two transformers are running, each other hot standby.
One with a prepared, you can only put one of the transformer, any of its transformers can all the load to bring all the general into the line breaker and bus in the breakdown of the circuit breaker, interlock between the three, A change vote, B variable can not vote, or vice versa, B cast A can not vote. This is the nature of the load mostly for a load, power supply is necessary for high reliability, but also the largest investment.
Dual use can be divided into several, mainly refers to the change can be put into use, and some can be put into the parallel use, in some cases is not allowed to use in parallel, is the three circuit breakers with interlocking Three locks two spoons, three circuit breakers can only vote two. At the same time the capacity of the transformer is also different, some are prepared, some are dark spare, the specific use depends on how the original system design.
hope this helps.
One with one: single bus segment switch closed, only one transformer power supply, another standby.
Dual use: single bus section switch off, two transformers were powered.
Added:
Single bus segment wiring form, it is a single bus with sub-section breaker into several sections. Increased reliability and flexibility compared to single-bus non-segmentation.
Advantages:
1, two bus segments can be split operation, can also run side by side;
2, important users can be connected to a different dual-circuit busbars, to ensure uninterrupted power supply;
3, any bus or disconnector overhaul, only stop the paragraph, the remaining sections can continue to power, reducing the power outage range.
