ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Stray voltage in Bait tanks ?
by gfretwell - 06/24/21 01:08 PM
Where is Everyone?
by Jim M - 06/23/21 10:04 PM
Happy Father's Day!
by Bill Addiss - 06/19/21 04:16 PM
A Risky Setup
by timmp - 06/18/21 08:08 PM
Conduit over Vinyl Siding
by Jim M - 06/16/21 08:30 PM
New in the Gallery:
2020 - 2021 Winter Project
2020 - 2021 Winter Project
by Bill Addiss, April 29
Garden 2021
Garden 2021
by Bill Addiss, April 26
Who's Online Now
1 members (Scott35), 8 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#39340 06/16/04 08:47 PM
Joined: Jan 2002
Posts: 64
R
Rabbit Offline OP
Member
Anyone here installed power factor correction before? Did it pay off for your customer? Did it pay off for YOU?

/

#39341 06/16/04 10:45 PM
Joined: Mar 2004
Posts: 947
T
twh Offline
Member
I did a fair bit of it on oil wells a few years ago. My understanding was that it paid off for the customer in about 3 months, running 24 hours a day. With over 600 wells for one customer, how could it not pay off for the electrician?

In the case of an oil well, it is easy for the customer to track the savings (one meter per well with nothing else on the meter).

If you need to spend hours talking the customer into trying one, it may not pay off for you, and if they have a lot of other equipment, they may not notice the savings.

[This message has been edited by twh (edited 06-16-2004).]

#39342 06/16/04 11:22 PM
Joined: Feb 2002
Posts: 182
B
Bob Offline
Member
Is the customer being billed on a KVA demand?
Can you post the present power factor and cost per KVA?

#39343 06/17/04 12:24 AM
Joined: Apr 2002
Posts: 2,527
B
Moderator
Without careful study of the billing utility’s rate schedule and setting up a spreadsheet, there is almost no way to tell.

#39344 06/17/04 08:50 PM
Joined: Jan 2002
Posts: 64
R
Rabbit Offline OP
Member
No one building in particular. Just wondering in general.

#39345 06/18/04 08:05 PM
Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
Most utilities correct to a certain margin, (About 1)don't they? Most urban, and sub-urban areas at least. Around here they do, I see thier cap's all over the place.


Mark Heller
"Well - I oughta....." -Jackie Gleason
#39346 06/20/04 07:15 PM
Joined: Jul 2002
Posts: 8,407
Member
e57,
The capacitor banks used by utilities are usually only used to correct the p.f on thier Distribution systems, to correct the Inductive effects of transformers, etc.
Over here, large users of electricity are penalised by higher Tariffs, that have a power factor under a certain figure (0.65 lagging, I think).

#39347 06/20/04 08:00 PM
Joined: May 2003
Posts: 2,876
E
e57 Offline
Member
In situations like that I guess it would pay off, wouldn't it?


Mark Heller
"Well - I oughta....." -Jackie Gleason
#39348 07/14/04 05:59 PM
Joined: Jul 2004
Posts: 625
S
Member
Does the standard kWH meter register watts or VA? I've always been under the impression that it measures actual watts, not VA.

#39349 07/15/04 12:52 AM
Joined: Jun 2004
Posts: 1,273
T
Member
Most tariffs, IIRC, start spanking commercial users as their power factor slides below .80....

Such customers will typically have dual metering mandatory -- 1000A in my area....

When the PoCo sees poor power factor they bill 'em under their tariffs.

You can read the meters, yourself. If the powerfactor drops to .75 -- the prospect is getting dinged, one way or the other.

Inductive loads trigger this, in my area, think air conditioning....loads of magnetic ballasts would perform likewise.

Poor powerfactor triggers major capital expentitures by the PoCo. They have to upsize everything up the line until it is corrected.


Tesla

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
AllClear
AllClear
Belmond Iowa US
Posts: 44
Joined: August 2005
Top Posters(30 Days)
Admin 10
Popular Topics(Views)
280,481 Are you busy
213,569 Re: Forum
200,439 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5