Answer / santosh_kawade

Difference between online UPS and OFFline UPS
(Uninterrupted power system):

1) Online UPS : In this system UPS is alway connected to
system. All equipment recieve power through UPS system. In
case of power failure it provide backup without any break
(no break system not even in milliseconds)

2) OFFline UPS : In this system UPS is not always connected
to system. As per design it only monitor healthiness of
power supply system and as soon as power goes OFF its
switch on automatically in few milli-seconds and provide
power back.

Nomrmally online UPS is preferable.

Santosh Kawade
9224 69 3116

Answer / sunil guru

>>>>>ON LINE UPS -- HAS MUCH MORE FEATURES THAN OFF LINE AND PRICE WISE ITS PRICE IS Much higher THAN OFFLINE

IN ONLINE UPS THERE IS NO CHANGE OVER TIME SO THE SENSITIVE EQUIPMENT LIKE PC DOES NOT REBOOT,OUTPUT IS PURE SINE WAVE,THERE ARE MANY PROTECTIONS FORM MAIN UTILITY IS PROVIDED BY UPS LIKE (SPIKES,RUGGEDNESS,TRANSIENTS,HARMONICS,OVER VOLTAGE,UNDER VOLTAGE,SHORT CIRCUIT)
WHICH ARE NOT MAINLY FOUND IN OFFLINE UPS.

IN ONLINE BATTERY IS ALWAYS IN OPERATION (AC-DC -BATTERY -DC -AC)

>>>>>IN OFFLINE THERE IS A CHANGE OVER OF FEW MILLI SECOND
ONLY FEW PROTECTIONS ARE PROVIDED
BATTERY IS NOT IN CONTINUOUS OPERATION (IT COMES IN PICTURE ONLY WHEN MAINS FAILS)

FOR ANY DISAGREEMENT CONTACT ME ON parmar20072008@yahoo.com

if 2 coil of 1000W connect in series and 200 v is applied across it . then what is the total power of coil when coil have only resistive load .

0 Answers   BSNL,

---

75kw drive operated motor current fluctuation from(85-130)ampere.current setting in drive is 130amp.sometimes motor trip when current limit cross 130amps.I change the drive. still current fluctuate between 80-130amps but in this time motor not trip,current setting in drive is 130amps.where is the problem?

1 Answers  

---

What is Control & Relay Panel? And Remote Control Center?

0 Answers   L&T,

---

how are reversing the direction of rotation of dc motor

0 Answers  

---

when we conduct high voltage testing why milli amp. is required?

2 Answers  

---

which motor is used in electric train...???????

27 Answers   ESPL, IOCL,

---

How generating electric power export to grid from the generating station ?

0 Answers  

---

Transformers with dc supply

4 Answers  

---

Types of test in Switchgears, MCC, NGR and DB's how it should be procced. Can anyone give me the details here or email me to pasuvaraj.k@gmail.com

0 Answers  

---

WHAT IS DIFFERENCEN BETWEEN CURRENT AND VOLTAGE?

5 Answers  

---

Can we put 3 layers of cable tray while installing tray

0 Answers   NTPC, Siemens,

---

hi frienda We have 250kva 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

2 Answers  

---