What is the difference between online ups and offline ups?
- 44 Answers
- 206963 Views
- Electrical Tech, GMR, Gravity India, HCL, Indus Towers, NIT, Pyramid, Techno Electric and Engineering, UBS, I also Faced
- E-Mail Answers
Answer Posted / deepu
in the case of online ups,we are getting constant output voltage without any varriation ,if there is mains or not.
but in offline the output voltage is varried during the changeover time..
so online ups is the better choice for computer applications than offline...
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
What is measurement?
From past few months I am getting lagging pf even though sufficient capacitors used in circuit. Where is the problem pls answer
How to design harmonic filter at the project stage without nowing the harmonics levels
How to calculate the time setting for star connection in star delta starter? For example 10KW 3PH Induction motor.
On what basis the the size of Lightning arrester for buildings are selected ?
A 50Hz,4-pole,3-phase,star-connected synchronous motor has a synchronous reactance of 12ohmsper phase and negligible armature resistances.the excitation is such as to give an open-circuit voltage of 13.2kilovolt.the motor is connected to 115kilovolt, 50hertz supplying. what maximum load can be the motor torque,line current and power factor?
Please explain the following and how these are working with PLC unit 1.I/O Module 2.I/O Device 3.Adaptor Card 4.Ribbon Adaptor 5.RS 485-FC
There is any especial requirement for motor to drive through with VFD?
IN MY SYSTEM THERE IS ONLY OVER CURRENT EARTH FAULT RELAY IS AVAILABLE. FOR THE UNBALANCE SENSING IS THERE ANY RELAY IS AVAILABLE? THE SAME CTs WHICH ARE USED FOR THE OVER CURRENT EARTH FAULT RELAY CAN USE FOR UNBALANCE ALSO?
How harmonic block test are conducted on relays ( Siemens,Areva ect )power transformer using omicron kit?
The Howland current source produces a A Unidirectional floating load current B Bidirectional single-ended load current C Unidirectional single-ended load current D Bidirectional floating load current
What do you mean by the zone of protection?
How to calculate total harmonic distortion level(THD) in VFD? and how can we reduce harmonics?
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?
where we use the SFU & FSU?
