The current transformers are placed on both sides of circuit breaker so that the protection zone are overlapped and cover the circuit breaker.The potential transformer is connected to the bus bar and on the incoming line side. The current transformer is used for measurement and protection. The isolator is provided on each side of the circuit breaker. Voltage transformer connection for control and metering.The circuit breaker is connected between the bus-bar and each incoming and outgoing circuit. Outgoing feeder for feeding the other subsequent substations or switchgear. Single line diagrams micro Project by Yash Rajesh Jadhao Subject electrical substation practice.The single line diagram of the substation is shown in the figure below.The connection of the substation is divided as

Availability of suitable and sufficient land вЂ“В The land selected for a substation should be level and open from all sides. Similarly, the step-down transformer should be located nearer to the load centre to reduce transmission losses, the cost of the distribution system and better reliability of supply. For example, a step-up transformer is a point where power from various sources is pooled and step up for long distance transmission should be located as cool as possible to minimise the losses. Type of substation вЂ“В The category of the substation is important for its location. Selection and location of a site for an Electrical SubstationThe following factor is considered while making site selection for a substation.

Availability of Essential Facilities to the Staff вЂ“ The site should be such where staff can be provided essential facilities like school, hospital, drinking water, housing, etc. Thus, the substation should not be located near the factories or sea coast.

Substation One Line Diagram