Answer Posted / martin

Online UPS is the one which gives output all the time from
battery whether there is power failure or power on. You
get backing from battery all the time.

Offline UPS supplies Mains to the output when power supply
is regular and charges batteries as well at the same time.
When power fails it switches those batteries to produce
output for power backup.

hi, i have 3x200KVA and 2 x 80KVA UPS with battery bank of 150AH 68Nos. and 100AH 204Nos., i need to install AC either ductable or PAC type, so can you help me to calculate heat load and capacity of the AC to install.

2511

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what is gridrotor resistance starter

1626

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Why do we perform an open-circuit test and short-circuit test on the transformer?

846

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how to identify the cable quality and what is flame proof cable

1851

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hr round

1864

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Can we Co-ordinate relay in Load Break switch?

1698

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from where the self excitrd induction generator get the power?why is the voltage regulation is poor of seig?

1950

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there are cam operated switches - why we call cam operated , What is cam ?

1651

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prove that power consumed in 3 phase delta system is 3 times as compared to 3 phase star system

1909

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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

1942

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What do you mean by the zone of protection?

804

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What are the types of windings according to the construction?

799

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What is the relationship between voltage,current & frequency?

1469

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What is the Difference between Ac Drives and Dc Drives? According to application, speed, Torque, cost, Reliability, Construction, Motor etc... Thankyou !!!

1876

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what is the voltage between earth & neutral in 3 phase electrical connection.

1671

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