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Answer Posted / raul
turbine 14 DTE
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following are the questions asked in interviews: 1) Considering the short circuit fault, which switchgear is preferable, SFU OR MCCB? Which operates faster? whicg one is popular in Indian Market and why? 2)Define SCPD. What is type2 coodination? 3)Why the contactor rating is higher for the fuseless selection than for fuse selection? whether the ratinf of SFU or MCCB remains the same in both the cases? 4)If the HP rating is known then can you calculate the ratings of L.V Switchgear(SFU/MCCB, contactor, OLR) without using the selection chart?
lorteny method
In case of generator when we consume more power produces by it why load on generator increase and starts sound more. and how it is adjusted..
How can we calculate the efficiency of a Running (On-Load) Motor ? What parameters are required and what is the method ?
What are the types of piano switches?
why the colour of insultor stack , petticoat is brown. Is it has some technical reason.
what are the accessories need to be added while doing estimation for the following: 1.MCCB 2.MCB 3.ACB
What is the feedback in the control system?
what is auto re-closer?
i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?
I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.
Approach of a cooling tower is the difference between temperatures of what factors?
I want to know the 'Test voltage' for Tandelta testing of 3.3 / 6.6 / 11 KV Motors. Please explain
With a phasor diagram show the effect of increasing the field current of a generator supplying a constant real power and connected to a grid system.
Why power genaration in India is at 50HZ while America its 60HZ
