Type of construction of CT's:

Type of construction of CT's: Ring type CT or Window type CT:This is the simplest type of CT. The core has three types of popular shapes (1) Rectangular shape (2) Oval shape (3) Ring shape.Ring Type CTBar primary current transformers:✥The core is of a Nickel-Iron Alloy,...

Essential Qualities Of Protection

Essential Qualities Of Protection As soon as the fault occurs on the power system, protection scheme should disconnect/isolate the faulty part as quickly as possible to minimize the damage to the system and to maintain the continuity of supply. Protective scheme may...

Type of Lightening Strokes

Type of Lightening StrokesThere are two main ways in which a lighting may strike the power system:(a)Direct stroke.(b) Indirect stroke.(a)Direct stroke:☛In case of direct lightening stroke, the charge from the cloud is directly discharged on the object below it.☛After discharging,...

Lightening Arresters

Lightening Arresters:• Protection against direct lightening strokes is provided by using the earthing screen and ground wires. But these two apparatus fail to provide protection against travelling waves; which may reach the terminal apparatus.• The lightening arresters...

Types of Resistance Welding

Types of Resistance Welding:(A)Butt welding:❉ Rods, pipes and wires are welded by this method. As shown in Fig. (A) there is a transformer, across secondary of the transformer two pieces of metal to be welded are held. The two pieces are held in clamps. One clamp is fixed...

Type of Transmission for Drive

Type of Transmission for Drive:☞The motor power output available at the shaft is the transmitted to respective load through a transmission, media like chain, belt, gear, rope etc.☞The choice is governed by most economical speed of motor. The dimensions and hence the cost...

Single Phasing Preventer

Single Phasing Preventer:✪The concept of single phasing is already explained in section 6.2.✪When one of the phase is blown off due to open circuit or due to operation of fuse of that phase then three phase Induction motor still works with two phases.✪The whole power is...