smfl-86150ks Samwha Electric Co., Ltd., smfl-86150ks Datasheet - Page 2

• Manufacturer Part Number: smfl-86150ks
• Description: A.c. Harmonic Filter
• Manufacturer: Samwha Electric Co., Ltd.

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Once Harmonic is generated in system, it moves around and affects on the connected other electricity
facilities.
•Overheating and loss of transformer
•Influx of over current of capacitor and noise
•Instability of control system
•Voltage change
•Overload of rotator
•Errors on the movement of circuit breaker
•Impediment in communication and interfering OA functions
•Heavy current in neutral and low voltage between phase and earthing
〉
Harmonic filter is a device which represses and absorbs the outflow of harmonics generated in the
electricity system. It consists of resistor, reactor and capacitor.
Basic harmonic filter consists of lower order [5-13th order] single shunt filter which is synchronized with
the harmonics current generated.
For other higher order frequency, higher order filter shall be installed, if necessary.
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• I mprovement of power factor [invalid power in the electricity system is removed, resulting in the
improvement of economics]
•Absorption and removal of harmonics
•Resolving the problem of resonance between inductive and capacitive in the system.
•Keeping the performance and lifetime of the facility high by keeping normal voltage
The effects of contained harmonic current by filter can be expressed as following :
Disturbance by Harmonics
What is Harmonic Filter?
Effects of Harmonic Filter
Vn
Vn
=
=
───── · In =
Zfn + Zsn
───── · In =
Zfn + Zsn
Zfn·Zsn
Zfn
4-1 A.C. Harmonic Filter
─────
Yfn + Ysn
───── · In , Ifn = ───── · In = ───── · In
Yfn + Ysn
Creative TEchnology Provider
Ysn
In
Samwha
Zfn + Zsn
Zsn
Yfn + Ysn
Ysn
29
Samwha