Cabinet Type Substation

Distribution-type substations are placed where the main voltage distributions are stepped down to supply voltage to the consumers using a distribution network. The voltage of any two phases will be 400 volts, and the voltage between neutral and any phase will be 230 volts.

The following electrical ratings are typical: Primary voltage: 6.9–69 kV Transformer kVA: 500–20,000 kVA Secondary voltage: 2.4 kV–34.5 kV The primary unit substation is defined in the following standard: IEEE Standard No. 100-2000 Primary unit substations are used to step down utility distribution voltages to in-plant distribution voltages.

A substation is an electrical system with high-voltage capacity that can be used to control apparatus, generators, electrical circuits, etc. The Substations are mainly used to convert AC (alternating current) to DC (direct current). Some types of substations are tiny in size and have an inbuilt transformer as well as related switches. Other types of substations are very large, with different types of transformers, equipment, circuit breakers, and switches.