Power Factor Correction: Metering & Inductance

  • Thread starter Thread starter brenfox
  • Start date Start date
  • Tags Tags
    Inductance
AI Thread Summary
Power factor correction is essential for improving efficiency in electrical systems, particularly for motors with a low power factor, such as 0.69. Capacitors were installed downstream from the meters to correct the power factor, raising concerns about accurate metering since meters cannot register apparent power. The power company prefers a power factor close to 1 for grid compliance, but the responsibility for achieving this lies with the user. There is a debate about the correct placement of capacitors in relation to metering for optimal performance. Ultimately, the discussion highlights the complexities of power factor correction and its implications for energy management.
brenfox
Messages
71
Reaction score
1
I am sure this has been discussed many times before but here goes. I was recently working on motors with a power factor cosine of 0.69. To counteract this the company installed banks of capacitors to get the power factor near 1. My question is this, the capacitors were installed downstream from the meters. Surely it needs to be the other way round as meters cannot register apparent power?
 
Engineering news on Phys.org
The power company prefers you to show a power factor near 1 to the grid. How you do it is your problem.
 
Nah, its not my problem.
 

Thread 'How might electronics be different if AC voltage was 72V at 45 Hz?'

Hey guys. I have a question related to electricity and alternating current. Say an alien fictional society developed electricity, and settled on a standard like 73V AC current at 46 Hz. How would appliances be designed, and what impact would the lower frequency and voltage have on transformers, wiring, TVs, computers, LEDs, motors, and heating, assuming the laws of physics and technology are the same as on Earth?
View full post »

Thread 'Why does the amperage go real high if there is a low voltage short?'

I used to be an HVAC technician. One time I had a service call in which there was no power to the thermostat. The thermostat did not have power because the fuse in the air handler was blown. The fuse in the air handler was blown because there was a low voltage short. The rubber coating on one of the thermostat wires was chewed off by a rodent. The exposed metal in the thermostat wire was touching the metal cabinet of the air handler. This was a low voltage short. This low voltage...
View full post »
Thread 'Electromagnet magnetic field issue'

Thread 'Electromagnet magnetic field issue'

Hi Guys We are a bunch a mechanical engineers trying to build a simple electromagnet. Our design is based on a very similar magnet. However, our version is about 10 times less magnetic and we are wondering why. Our coil has exactly same length, same number of layers and turns. What is possibly wrong? PIN and bracket are made of iron and are in electrical contact, exactly like the reference design. Any help will be appreciated. Thanks. edit: even same wire diameter and coil was wounded by a...
View full post »

Similar threads

Self excited induction generators and grid connected solar inverters?
Replies
9
Views
2K
Power factor of a retrofitted LED unit in a fluorescent fitting
Replies
8
Views
2K
How to correct for a Leading Power Factor (kVArh)
Replies
9
Views
8K
Building a Safe and Efficient Induction Heater Circuit: Tips and Tricks
Replies
7
Views
6K
Having difficulty increasing my load power factor above 0.95
Replies
12
Views
3K
Power Factor Correction: Capacitor Bank
Replies
32
Views
6K
The use of current transformers
Replies
15
Views
2K
Why won't power utility company charge for kVA instead of kW
Replies
35
Views
9K
How to calculate reactive power for 3 phase induction motor
Replies
4
Views
8K
Convert 1 phase to 3 phase by using an old washing machine
Replies
19
Views
4K

Hot Threads

Recent Insights

Back
Top