જ્યાં ઉપમેયનો ઉલ્લેખ જ કરવામાં ન આવે અને ઉપમાન જ ઉપમેય હોય ત્યારે દ્રષ્ટાંત અલંકાર બને છે. - આ કથન સત્ય છે કે નહિ અને જો ખોટું હોય તો સત્ય કથન કયું હોઈ શકે?

1.મંગલ + આચરણ - મંગલાચરણ
2. હરિ+ઇન્દ્ર - હરીન્દ્ર
3.નર+ઈશ - નરેશ
4. પ્રતિ+અક્ષ - પ્રતિક્ષ
ઉપરોક્ત વર્ણવેલમાંથી કઈ સંધિ સાચી છે.

The normal percentage bias setting of differential relay used for transformer protection will be

In bias differential protection for transformer,
There are two basic settings required to setup the percentage biased differential protection.
1. Minimum pickup
2. The slope.

The minimum pick-up covers the transformer magnetizing current typically 1-4% of transformer rating.
A pick up of 0.2 to 0.3 times the TAP is recommended for general cases.

The slope is defined by determining the potential sources of differential current.

A 16 A, Type B Miniature Circuit Breaker (MCB) will disconnect a fault in 0.1s when the fault current is

Class B trip curve:
The MCB with class B trip characteristics trips instantaneously when the current flowing through it reaches between 3 to 5 times rated current. These MCBs are suitable for cable protection.
Hence, For 16 A current Type B MCB disconnect fault at 3*16 = 48 A to 5*16 = 80 A.

In computer networks, the nodes are

Which type of connection is employed for current transformers for the protection of delta- star connected 3-phase transformer?

The connection of CT on primary and secondary side is always reverse to the connection of transformer.
To protect the power transformer with star-delta against fault, the type of connection of CTs should be in the delta–star connection otherwise the relay will operate when an external fault occurs due to zero sequence currents