Answer / bijay

OBVIOUSLY OFF LINE UPS IS BETTER THAN ONLINE UPS,WHEN IT
COMES TO POWER SAVING.
REASON BEING IN ONLINE UPS CHARGING(FLOAT CHARGING)IS
ALWAYS CONSUMING ENERGY,EVEN IF THE BATTERY IS FULLY
CHARGED.WHEREAS IN OFFLINE UPS NO NEED OF FLOAT CHARGING IS
THERE,OFFLINE UPS REQUIRES ONLY BOOST CHARGING

Answer / rafi

Online ups - When the supply line is on the battery is
charging at the same time we are consuming power from
battery
Offline ups - When the supply line is on the battery is
charging but we are consuming power from the line, when the
line is off then only we are consuming power from battery

Answer / srij21

According to me both will draw same power depending upon
the load connecte to it.

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reason behind why the reverse power relay of incoming machine was not acted even when no load was shifted on incoming machine after synchronising the machines ?

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can transformer work on dc or not?if we increase the inductance of transformer can it happen to work on dc?

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explanation of mesh bus bars

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When we give supply to a transformer 11 kv and we get 415v from it, so when we give supply to same transformer 415v on ht side what we get? and When we gives supply to any transformer to L.T. side 415v or 220v What supply is on H.T. side?

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A genarator is connected through a 20MVA ,13.8/138 KV stepdown transformer to a transmission line. at the reciving end of the line a load is supplied through a step down transformer of 10MVA,138/69 KV rating .A 0.72 PU load evaluated on load side transformer ratings as base values ,is supplied from the above system for system base values of 10 MVA and 69 KV in load circuit the value of the load in generator circuit will be ...........

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hi frienda We have 750kva cater pillet dg set we are fasing one diffrent proublam in dg we are start dg set after one mint applying load around 450a load but dg was run 3 Or 4 mints after 3 mints dg was shuding down automatic how to face this proublam pls tel any budy

1 Answers  

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