Power Factor & Harmonic Correction
BENEFITS OF POWER FACTOR CORRECTION
There are numerous benefits to be gained through power factor correction. These benefits range from reduced demand charges on your power system to increased load carrying capabilities in your existing circuits and overall reduced power system loses. And the benefits of power factor correction aren’t just limited to the balance sheet; there are also huge environmental benefits associated with power factor correction, which means your company is reducing it’s carbon footprint and helping the environment.
- REDUCED REACTIVE POWER CHARGES
Vector and other electric utility companies charge for excess kVAr’s consumed under a power factor of 0.95. For medium-level power consumers, this can mean thousands of dollars per month in fees if the site has not installed power factor correction or existing power factor correction units are undersized/not functioning. Pay off times for installing power factor correction can be as low as 12 months.
- REDUCED MAXIMUM DEMAND CHARGES
Most electric utility companies charge for maximum metered demand based on either the highest registered demand in kilowatts (kW meter), or a percentage of the highest registered demand in kVA (kVA meter), whichever is greater. If the power factor is low, the percentage of the measured kVA will be significantly greater than the kW demand. Improving the power factor through power factor correction will therefore lower the demand charge, helping to reduce your electricity bill.
- INCREASED LOAD CARRYING CAPABILITIES IN EXISTING CIRCUITS
Loads drawing reactive power also demand reactive current. Installing power factor correction capacitors at the end of existing circuits near the inductive loads reduces the current carried by each circuit. The reduction in current flow resulting from improved power factor may allow the circuit to carry new loads, saving the cost of upgrading the distribution network when extra capacity is required for additional machinery or equipment, saving your company thousands of dollars in unnecessary upgrade costs. In addition, the reduced current flow reduces resistive losses in the circuit.
- IMPROVED VOLTAGE STABILITY
A lower power factor causes a higher current flow for a given load. As the line current increases, the voltage drop in the conductor increases, which may result in a lower voltage at the equipment. With an improved power factor, the voltage drop in the conductor is reduced, improving the voltage at the equipment.
- REDUCED POWER SYSTEM LOSSES
Although the financial return from conductor loss reduction alone is seldom sufficient to justify the installation of capacitors, it is sometimes an attractive additional benefit; especially in older plants with long feeders or in field pumping operations. System conductor losses are proportional to the current squared and, since the current is reduced in direct proportion to the power factor improvement, the losses are inversely proportional to the square of the power factor.
LPINZ partners with Emerson
LPINZ is proud to report that Emerson Network Power has signed our organisation on as a Silver Solutions Channel Partner. Emerson is a global provider and manufacturer of power quality solutions such as UPS, Generator Transfer Switches and Datacentre Cooling Read More »