1)Why potential transformer primary site grounded?
2)can be loop between neutral & body for grounding?
3)What is the difference between ELCB &RCCB?
4)Why we use iron core in transformer insted of wooden core?
5)what is the principle of excitation?
6)Why we test the core balance test for transformer?
7)what is creepage?What is the creepage length for
insulators at different voltages?
8)How much type of relays used for differential protection
of generator,transformer & busbar protection?
Answer Posted / arb555
1) Usaully relays are connectd in 2ndary . SO to detect faults
2) no
3)ELCB detects phase to earth faults
RCCB - trips if net current is not zero
4) to incresae the permeability
if air used-air core
iron -iron core
no wood- its an insulator
5) Dc fiels required in generators for excitation.
7)I think its the distance b/w insulaotors.
8) Merz pRice circulating current basd relays are common
Better answers always let me know !
Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
suri transmission
What are the major reasons for balancing hydro-thermal mix?
WHAT IS MEANT BY INSULATION CLEARANCE IN VACCUM?
What current position are you holding in your current company?
how to increase or decrease speed in DC shunt motor by DC convertor
what is lumped and distributed elements?
Fantio of tranformer
what is the significance of tan&delta and how it performed in power transformer
Let me know that how i calculate the alternator sub tranciant reactance and tranciant reactance.
What is Fire Panel ? How it works ?
what is the relation between reactive power and power factor for the what is the limit of reactive power and power factor
in our all power plant have connected in grid and grid voltage and plant voltage is same, but as per as electrical concept the power will transmit from high potential to low potential but here altough same,then how power transmit from power plant to grid.
why core is useful for a transformer ?and also in its operation ?
why they were using TRIAC instead relay in some controllers and what is the advantages.
In power transmission using open belts or horizontal shafts it is preferable to have the slack side of the belt on the top because