Answer Posted / simon peter
SF 6 is a gas namely sulphur hexa floride. It is filled in circuit breakers of high amp which acts as a quenching med to absorb high sparking produced among the terminals during breaking heavy circuits.....
Is This Answer Correct ? | 3 Yes | 0 No |
Post New Answer View All Answers
At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?
Why are the laminations insulated from each other?
PLEASE SEND THE PREVIOUS YEARS QUESTION PAPERS OF RRB JUNIOR ENGINEER-ELECTRICAL
Why electrical power generation and transmission done in 3 phase system not more than 3 phase ?
In our factory so many iron pillors are exists for supporting the shed/Hangar. If do more no of earthings at one piller instead of doing more earth pits in many locations and running earth strip around the hanger, I can save the money. Please suggest this method is acceptable as per Is specifications though the Earth resitance of the farthest piller is with in the limits as per IS specifications.
What is safety of Ht panel
Define active filter?
What is the armature mmf in a D.C machine?
a)In a 3-phase 4-wire circuit, a circuit breaker is selected to protect the circuit whose highest fault level is 6.6 MVA. Determine the required minimum breaking capacity in kA. (Note: Covert 3-phase power in terms of kA to find answer.) b)Using the below, determine the required minimum making capacity in kA as a “peak value”. Rate breaking capacity (Icn) ka: Icn<= 1.5 Factor = 1.41 1.5
i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester
WHAT IS THE DIFFERENCE BETWEEN AN ACB & mccb 7 WHAT IS THE CRITERIA WHEN TO USE WHICH OF THE TWO
comparision between ACB and VCB
Why armature rheostat is kept in maximum position?
How to calculate the multiplying factor for energy meter with ct ratio given
What is the formuala to calculate the rating of motor protection circuit breaker