Brief Intruduction of Harmonic
Introduction of harmonic
Several electrical devices have nonlinear operating characteristics i.e. even when the applied voltage is sinusoidal, the current drawn by the device is non-sinusoidal. These nonlinear devices used in power distribution circuits create nonlinear currents which subsequently cause voltage distortions. These nonlinear currents and voltages have been generally referred to as harmonic currents and voltages. The proliferation of electronic switching devices in modern equipment has resulted in a significant increase in the amount of harmonic pollution in electrical distribution systems. These harmonics if disregarded or undetected may cause harmonic resonant conditions, which could present system operating problems resulting in complaints from customers and reduced life of power equipment as well as degraded efficiency and performance. Harmonic currents and voltages can cause many unfavorable effects on the power system itself and the connected loads. Malfunctioning of electronic equipment, capacitor failure, transformer, and neutral conductor overheating, and excessive heating in rotating machinery are some of these effects.
Harmonic currents are generated by non-linear loads like:
·LED and CFL lighting,
·Switch Mode Power Supply (SMPS) units (computers, PLCs),
·Variable frequency drives used with motors
·UPS
·Arc furnaces & SCR temperature controllers Battery chargers & Rectifiers
Harmonic Definition: A harmonic is a signal or wave whose frequency is an integral (whole-number) multiple of the frequency of some reference signal or wave. The term can also refer to the ratio of the frequency of such a signal or wave to the frequency of the reference signal or wave.
The Harm of Harmonic:
1) increase the electric energy loss in the electric transmission line;
2) can make the capacitor and transformer burned or explode;
3) can affect the malfunction or refusal of a relay protectors and automatic devices;
4) can badly affect the communication quality;
5) Have a serious impact on computer center and medical facilities;
6) others
Benefits to users of installing APF/AHF
Energy savings and increased electric network capacity
Make power to comply with power quality standards and requlations (IEEE 519, G5/4, EN 50160, and others)
While improving production efficiency, it also makes the operation of the entire factory more reliable and reduces maintenance costs.
Extend the service life of various electrical equipment.
The Perfect Solution by APF/AHF:
Product Description
Actual Operating Effect on site in Europe:
| THDI dropped from 26% to 6% |
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Packaging & Shipping
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