WHAT IS DIAC? A diac belongs to thyristor family. Once it is triggered, it starts conducting in both directions. It is similar to diode but there is a main difference between diode and diac.  The diode conducts in one direction, when it is forward biased. On the other hand, diac conducts in both directions or […]

Underground Cables

Underground Cables Underground Cables are used for transmission and electric poser in congested areas (Such as in cities, towns etc) at comparatively low at medium voltages. Usually, the underground cables used in congested cities or towns, substations, railway crossings and where safety is very important. However, recent improvements in the design and manufacture have led […]

Electrical Transducer

Electrical Transducer There are number of physical or non-electrical quantities which can be measured with the help of electrical or electronic instruments. Transducer plays very important role in industries.  Basically, an instrumentation system consists of three main parts, namely input device, a signal conditioning device and an output device. The output device may be a […]

Buchholz Relay

Buchholz Relay Buchholz relay is a protective and gas actuated relay . It is used in that transformer whose winding is  immersed in oil and rating having more than 500KVA. It is used to the transformer against internal or incipient faults only. Basically, it is used for detection of winding faults. Buchholz relay is invented […]