Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Primary circuit diagram of a step-down substation with two main transformers

What is Mobile Substations ?Mobile Substation DefinitionA mobile substation is a portable power distribution system used for temporary or emergency power supply.ComponentsIncludes transformers, cooling systems, switchgear, metering systems, protection relaying systems, auxiliary power supplies, surge protection, and cable connections.Types of Mobile Substations Compact and modular mobile substations Skid-mounted substations Containerized substations Rail-wagon substationsBenefits Offers mobility

Electrical Substation DefinitionNowadays, the demand for electrical power is growing rapidly. To meet this demand, we need larger power generating stations, which can be hydro-electric, thermal, or atomic. These stations are built in various locations based on resource availability, often far from the areas where power is consumed.Therefore, it’s necessary to transmit power from generating stations to load centers using high-voltage networks. Power is generated at low voltages but transmitted at

Ring distribution system

Method of EarthingWe connect all the points to be earthed to the earthing grid using corrosion-resistant mild steel rods, buried at least 600 mm below ground. If these rods cross a cable trench, road, underground pipework, or rail track, they should be at least 300 mm below the barrier.We use MS rods for connecting the earth grid below ground level and MS flats above ground. The connection between different earthing points and the earthing grid is called the riser. We use MS flats for the riser

What is an Electrical Isolation Switch?Isolator DefinitionAn isolator in electrical systems is a manually operated mechanical switch that separates a part of the circuit for safe maintenance.A circuit breaker trips the circuit, but its open contacts are not visible from the outside. Therefore, it is unsafe to touch an electrical circuit by just switching off the breaker. For better safety, we need a way to visibly confirm that the circuit is open before touching it. An isolator is a mechanical s

Radial distribution system

Electrical Power Distribution System DefinitionAn electrical power distribution system is defined as a network that delivers power to individual consumer premises at a lower voltage level.An electrical power distribution system provides power to individual consumer premises. The distribution of electric power to different consumers is transmitted via a much lower voltage level compared to the transmission of power over long distances (i.e. over long transmission lines).The distribution of electr

Two examples of ring network

What is the Ferranti Effect?Ferranti Effect DefinitionThe Ferranti effect is defined as the increase in voltage at the receiving end of a long transmission line compared to the sending end. This effect is more noticeable when the load is very small or there is no load (open circuit). It can be described as a factor or a percentage increase.In general practice, current flows from higher potential to lower potential to balance the electrical potential difference. Usually, the sending end voltage i