Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Mains voltage range in India?

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,898
Helped
578
Reputation
1,159
Reaction score
557
Trophy points
1,393
Location
cambridge
Activity points
78,147
We need to make products for Indian mains voltage.

Please advise what is the range of mains voltages seen in India?
Highest. lowest, and amount of time at highest and lowest?

I am not talking about 50 microsecond mains transients here.
Not talking about tiny spikes. Talking about steady state, including short term excursions (swells) of the mains to high
or low level.

Also, does it go on and off often?, and what is seen at the wall socket when the mains suddenly comes back ON? (a big spike?)
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
14,001
Helped
2,789
Reputation
5,576
Reaction score
2,696
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
104,435
India suffers long-term brownout conditions. Several threads here have asked about methods of grid voltage stabilization (usually in India). One reported 50 percent voltage sag. It was a couple years ago just before news reported a grid blackout across half of India.
 

barry

Advanced Member level 5
Joined
Mar 31, 2005
Messages
5,093
Helped
1,113
Reputation
2,238
Reaction score
1,100
Trophy points
1,393
Location
California, USA
Activity points
27,907
India suffers long-term brownout conditions. Several threads here have asked about methods of grid voltage stabilization (usually in India). One reported 50 percent voltage sag. It was a couple years ago just before news reported a grid blackout across half of India.
In other words, the voltage range is 0 to 230V. :)
 

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,898
Helped
578
Reputation
1,159
Reaction score
557
Trophy points
1,393
Location
cambridge
Activity points
78,147
I am interested in India, because (and my sincere apologies to all from India) i am actually interested in the worst case voltages in UK and EU...and i reckon its probably more openly discussed in India, whereas in EU and UK the grid excursions are kind of private to the power companies. So if we take the worst case from India, then we can probably say its no worse than that in EU and UK.
 

Easy peasy

Advanced Member level 5
Joined
Aug 15, 2015
Messages
2,968
Helped
1,074
Reputation
2,148
Reaction score
1,108
Trophy points
113
Location
Melbourne
Activity points
16,494
it is very location specific, sags down to 180v only last a few minutes as eventually a breaker blows due to over current due to constant power loads, then of course the remaining connected loads see a jump in volts - likely back to 230/240 ...

equip should be designed to stop or draw less power below 207vac and self protect or tolerate up to 265vac and beyond

not much point making equip that will expire too easily.
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
14,001
Helped
2,789
Reputation
5,576
Reaction score
2,696
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
104,435
Quote from a Forbes magazine article:


Ensuring that the electricity being provided is of a high quality remains a critical challenge for the expansion of Indian infrastructure, without blackouts, brown-outs or other disruptions of service. India suffers from rampant electricity theft and heavily indebted electricity distribution companies (DISCOMs), and poor quality electricity has resulted in damaged equipment, losses of productivity and lower investment.


--------------------------------------------------

India is just one nation where these images are common. Local residents risk their lives climbing on utility poles, attaching wires in hopes to improve their lives by pirating electric power. The result is chronic grid brownouts.

Electric poles crowded (India).jpg
 

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,898
Helped
578
Reputation
1,159
Reaction score
557
Trophy points
1,393
Location
cambridge
Activity points
78,147
sags down to 180v only last a few minutes as eventually a breaker blows due to over current due to constant power loads, then of course the remaining connected loads see a jump in volts - likely back to 230/240 ...
Thanks, that sounds like the very recipe for a mains transient? ...perhaps of a few kV?

..as the mains springs back up to 240vac, all that fault current was flowing in the line inductance, when the breaker blows, the energy in that inductive current has nowhere to go....so the huge mains transient voltage spike then happens?
 

betwixt

Super Moderator
Staff member
Joined
Jul 4, 2009
Messages
14,864
Helped
4,854
Reputation
9,726
Reaction score
4,640
Trophy points
1,393
Location
Aberdyfi, West Wales, UK
Activity points
126,525
No - the spike is dissipated across ALL the connected devices. When you look at inductive spikes from power lines, don't forget there is a fraction of an Ohm load at the critical end formed from all the attached devices.

Brian.
 

treez

Advanced Member level 5
Joined
Sep 22, 2008
Messages
7,898
Helped
578
Reputation
1,159
Reaction score
557
Trophy points
1,393
Location
cambridge
Activity points
78,147
No - the spike is dissipated across ALL the connected devices. When you look at inductive spikes from power lines, don't forget there is a fraction of an Ohm load at the critical end formed from all the attached devices.
Thanks, so then, what we would assume from this is that mains voltage spikes only occur in regions where very little is connected to the mains line?
 

Easy peasy

Advanced Member level 5
Joined
Aug 15, 2015
Messages
2,968
Helped
1,074
Reputation
2,148
Reaction score
1,108
Trophy points
113
Location
Melbourne
Activity points
16,494
Mains spikes occur near large factories and other large un-predictable loads - and in the country or anywhere lightning strikes may occur

also failing on-load tap changers of disti transformers
 

LaTeX Commands Quick-Menu:

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top