Previous in Forum: Use of CVD for Interlocking   Next in Forum: Elcb Tripping
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
7 comments
Rate Comments: Nested
sake
Member

Join Date: May 2011
Posts: 6

Voltage Regulators

10/02/2014 11:35 PM

I would like some info on why are voltage regulators connected in star or delta on a system? What are the factors that are taken into account that determins which connection y or delta] is to be used eg 3 single phase regulators 6600v on a 6600v 3 wire system.thanks
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
lyn
Guru

Join Date: Oct 2008
Posts: 42355
Good Answers: 1693
#1

Re: voltage regulators

10/03/2014 12:23 AM

Alternator - Wikipedia, the free encyclopedia

HowStuffWorks "Understanding Alternator Power Output"

Unit 31 Three-Phase Alternators
Register to Reply
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#2

Re: Voltage Regulators

10/03/2014 12:22 PM

Assuming you're talking about an alternator, the voltage regulator isn't connected in star or delta. It looks at the actual output voltage, compares it with an in-built reference voltage, and adjusts the DC current to the field winding to equalise the two.

I don't know all the details, but I assume if the alternator is star connected the output volts could be measured phase-phase or phase-neutral, provided the regulator has the appropriate reference voltage. If the alternator is delta connected the output volts would be measured phase-phase, and again the reference voltage must correspond.

__________________
 Give masochists a fair crack of the whip
Register to Reply
2
PeterT
Guru

Join Date: May 2010
Location: Liverpool, NY
Posts: 961
Good Answers: 131
#3

Re: Voltage Regulators

10/03/2014 1:13 PM

I suspect that the OP is asking about voltage regulators used on electrical power systems to control the voltage on the distribution power lines. They may be connected in wye or delta.

Usually the connection of the regulators follows the configuration of the system. You say you have a 6600V, 3-wire system. I assume that it is delta, so it is effectively "ungrounded." In that case you would connect the regulators in a delta configuration, because connecting them in a wye would introduce a ground to a system that doesn't have one. If it were a 4-wire system (3 phases & grounded neutral), then it would make sense to connect the regulators in wye.

__________________
 To get the right answers, first you need to ask the right questions.
Register to Reply Good Answer (Score 2)
No more Good Answers.
redfred
Guru
Engineering Fields - Electrical Engineering - Been there, done that. Engineering Fields - Control Engineering - New Member

Join Date: Dec 2008
Location: Long Island NY
Posts: 15600
Good Answers: 981
#4

Re: Voltage Regulators

10/03/2014 4:43 PM

What other ways are there to connect three phase power but star (Wye) or delta?

The only reason I can see for somebody asking such a question is that person doesn't understand three phase power.

__________________
 "Don't disturb my circles." translation of Archimedes last words
Register to Reply
sake
Member

Join Date: May 2011
Posts: 6
#5

Re: Voltage Regulators

10/03/2014 6:19 PM

thanks for all the info.
Register to Reply
Anonymous Poster #1
#6

Re: Voltage Regulators

10/12/2014 12:06 PM

I think that the winding diagrams of power transformers have nothing to do with voltage regulators. A transformer carries out controlling its voltages by switching the tap changer. This device is impeded in the oil tank and able to switch even when the transformer is on load, so it named OLTC. You can find out more detail here http://www.psa-outline.com/category/power-system-analysis-2/ or see the simulation of transformers in power systems here http://www.psa-outline.com/category/training-on-videos/
Register to Reply
Plimos
Power-User

Join Date: Oct 2014
Posts: 143
Good Answers: 4
#7
In reply to #6

Re: Voltage Regulators

10/15/2014 9:57 PM

Two manufacturers of On-Load Tap Changer controllers, with plenty of literature in English or German:

http://www.a-eberle.de

http://www.reinhausen.com

ABB, Siemens or so I didn't search because their websites are not very easy to navigate (I'm not connected to any company I mention).

Synchronous generator voltage regulators (like from ABB, Basler,...) are something totally different.
Register to Reply
Register to Reply
Have a Different Question?
7 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); Codemaster (1); lyn (1); PeterT (1); Plimos (1); redfred (1); sake (1)

Previous in Forum: Use of CVD for Interlocking   Next in Forum: Elcb Tripping

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (98 right now)
Show Members
Advertisement