Double Busbar Scheme for outdoor switch yard system (132kv) step up power plant Hi friends 1. in this system both busbars energized all the time. 2. what is the meaning of main BB and transfer BB, 3. step up transformer connect main bus bar all the time or both BB connected through DS switch . 4.bus sectionalization means ? thank you.

ABC, Gael,

1 “earthing” for bonding of equipment and circuits to common plant earth electrode potential, 2 “protective earthing (PE)” when this bonding is required for personal safety provisions 3 “grounding” for interference suppressing bonding of screens, sys-tems with ground level 4. low-impedance earthing ? 5.primary earthing system and secondary earthing system what is that? 6.earthing electrode or mesh net earthing electrode ? very confusing , simple but very informative help required ? i will be very very thankful to you guys.

ABC,

what is the difference between switchgear and circuit breakers and is there any difference between outdoor and indoor switchgear and circuit breakers , and how would you differentiate between switch yard and substation and grid station . thanks

ABC,

A cable with concentric PE conductor must be used with frequency converter circuits what does its means.?

Cables Construction hi friends, 0.6/1/1.2 kV LV , DC and Control cables are concentric copper conductor what does its means and what is the use of concentric copper conductor,and are this with copper tape shield or copper screening, ? thanks

what is RTU with SCADA connection ?

LT, CC and LMU installed at both the outgoing circuits of 132 kv double ckt transmissio what its means ? and what are there use ?

What is LMU and LMDU. in PLCC communication of 132 kv transmission line. is it possible to use only one LMU with out LMDU ?

Hi friends. is it possible that SCADA System through RTUs can connect Via PLCC Communication carriers ? thanks

When electric field is parallel to the plane of incidence, the electromagnetic wave is said to be a.Linearly polarized b.circularly polarized c. Elliptically polarized d. Hyperbolically polarized

Due to velocity saturation, MOSFET reaches saturation a.Before Pinch off b. After pinch off c. At Q point d. Before Q point e. After Q point

Which system use dc to dc high voltage gain A. Solar system B. Battery backup

Natural frequency in the control system represents nature of a. Transient response b. Oscillations c. Overshoot d. Speed of responce

Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage

which theorem is used to analyse fault a)thevinin b)Norton c)Superposition d)jordan

FFC, NTS,