Question

What is the open point in a sub-network of distribution substations? How does it operate? Please provide specific details.

Answer 1

Ans) The open point in a sub network of distribution system is an extra step to provide more reliability over different netwoks in distribution systems. The below disgram B-busbar d= distribution lines from 1 to 4 in taken out of 2 main distribution feeders which are connected through open opint represented as switch in the circuit.if one any kind of fault occours at d1 the open point will isolate the second dictribution circuit manually.so that the distribution of d2 and d4 is not interrupted and only d1 and d3 are interrupted. and if fault occours at d2 or d4 the first distribution feeder won't get effected as secong circuit get isolated and the first radial circuit still operates. in modern power systems they were controlled even by autoation circuits. they are very necessary for the relability of the system. A primary loop open point is sometimes necessary for critical loads lie hospitals that gets connected by them from both ciruit 1 and ciruit 2 and will trip off if one gets network gets fault and still receives power from other network as it is health and thus decreases the failure of power at hopitals and critical loads by vast number as both circuits having fault at same time is less likely to occour.