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TFA THIRD HARMONIC ISOLATION FILTER
Description
In installations with 3rd harmonic generation loads, the current through the neutral cable can be higher than the one in the phases, even in case of balanced loads. The most proper solution for these problems is to use a specific equipment for the 3rd harmonic filtering, consisting basically in a three-phase isolating transformer, delta-star connected, that filters the 3rd harmonic current, plus a passive filter which reduces the 5th harmonic.
Technical Characteristics
Transformador separador/Isolating transformer:
Tensión nominal del primario/ ..........3x400 V
Rated voltage of the primary
Tensión nominal del secundario/ ......3x230 V
Rated voltage of the secondary
Frecuencia/Frequency ........................50 Hz
Conexión del primario/ .....................Triangulo/Delta
Primary connection
Conexión del secundario/ .................Estrella/Star
Secondary connection
Conductor/Wiring ..............................Cobre/Copper
Protecciones/Protections:
Circuito de maniobra/ Control circuit ..Magnetotérmico bipolar 6A
6A bipolar circuitbreaker
Circuito de potencia/ .........................Magnetotérmico tripolar
Power circuit Diferencial/Three-phase
earth leakage switch
(30mA to 300mA)
Temperatura de trabajo/ ..................-10/+40oC
Climatic range
Protección/Protection .........................

Part number Power(kVA) Un (V) Dimensions (mm) (kg)
Weight
()
Price
L A H
TFA-40010 10 3X400/230 590 500 800 125 4.158
TFA-40015 15 3X400/230 590 500 800 160 5.047
TFA-40020 20 3X400/230 590 500 800 185 5.639
TFA-40030 30 3X400/230 900 750 1050 265 6.69
TFA-40040 40 3X400/230 900 750 1050 325 7.51
TFA-40050 50 3X400/230 900 750 1050 350 8.989
TFA-40080 80 3X400/230 900 750 1050 420 13.361
TFA-40100 100 3X400/230 900 750 1050 470 14.445

Harmonic filters TFA
TFA-40010 TFA-40015 TFA-40020 TFA-40030 TFA-40040 TFA-40050 TFA-40080 TFA-40100

Harmonic Filters
These filters are used when the main objective is not the reactive power compensation at the fundamental frequency, but to reduce the harmonic distortion in the supply system.
Among the problems caused by harmonics and which may make their suppression necessary, are the following:
Interferences in telecommunications.
Distortion on the mains voltage.
Disturbances in electronic systems.
Erratic operation of control and protection relays .
Failures in transformers and motors, due to overheating caused by losses on the core.
Overheating of protective fuses to the point where a minor spike on the line causes them to blow.
It should be pointed out that the impedance of all the filters is capacitive below its tuning frequency, whereby they also contribute, even if in a small scale, to the reactive power compensation at the fundamental frequency.
Installation of filters produces a modification on the topology of the electrical supply system. For this reason, the design of filters must be done with regard to an accurate analysis and study of the whole system.
According to the application, there are different types of filters:
3rd harmonic filter HBF-T
Isolation filter
Absortion filter HAF
High pass filter HPF
Active filter SINAF 2.0

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