Web admin Before we understand the difference between on load tap changer and a voltage regulator, first let’s try to understand on load tap changer and transformer taps. What are transformer taps? Transformer taps are positions in winding of a transformer which are used for voltage regulation ,Taps can change the number of turns in one winding … Read more
What is a differential protection relay? There are two types of protection relays mainly used in a power transformer, one is main protection relay which is differential protection relay and another is backup relay which is also called over-current earth fault relay. Differential protection relay is mainly used for internal faults of transformer and backup … Read more
What is a Sustainable House? Sustainable house– Its a home which is constructed by using eco-friendly raw materials ,it is designed in a way that it depends more on natural sources for lighting, cooling and its energy needs, it should consume very low energy and energy is recycled wherever possible. How to construct Sustainable Homes? … Read more
Why do we conduct tan delta test of cables? Tan delta test of cables is done to find out healthiness of cable insulation.Insulation is basically outer layer of the cables which is used to insulate the conductors inside. What is a tan-delta test & how it is done has been explained here. XLPE (Cross link … Read more
Why Tan delta testing is done? Tan delta test is conducted for transformer oil (read here) and also for electrical equipment like C.T, P.T, Transformers ,cables etc. Purpose of this test is to determine the condition of insulation. Insulating materials (oil and paper insulation on winding) may deteriorate due to moisture ingress, aging, mechanical stress … Read more
Electrical power can be transmitted and distributed by either using insulated cables or by using overhead lines on electrical towers. Overhead lines are suspended on electric poles or electrical towers at a safer distance above the ground so that it has a safe clearance from the ground and there is no risk of electrocution or … Read more
Introduction: DGA analysis (Dissolved gas analysis) of transformer oil is one of the tests that is conducted on transformer oil to know about various gases present in the oil of a transformer which in turn gives us information to assess health of a transformer. Testing of transformer oil is analogous to testing of human blood … Read more
Electricity: Generation>Transmission>Distribution Before electricity reaches our Household ,it is first generated in generating stations then transmitted to Grid substations , then to Power substations and further it is distributed from power substations to consumer end. Most of the equipment which are used at consumer end uses low voltage to operate, but we step-up this voltage … Read more
What is a Local Breaker Backup (LBB) Protection? As the name suggests Local Breaker Backup (LBB) protection is used as backup protection in case of failure of circuit breaker , it is also called breaker failure relay. Normally when a fault occurs ,different protective relays sense the fault and send tripping command to master trip … Read more
Testing and commissioning of a circuit breaker is done in all plants before putting the circuit breaker on load i.e before start of its actual operation to ensure that it works properly as per its specification . What is a circuit breaker? A circuit breaker (C.B) is an electrical device which is used to break … Read more