FAIR PLAY 2000
Przedsiębiorstwo
"FAIR PLAY 2000"





medal
Zdobywca Złotego Medalu
"Eltarg 2002"

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Reactors

DAMPING REACTORS FOR CAPACITOR BANKS


The transient switching and inrush currents of a shunt capacitor bank can be limited by a damping reactor connected in series with the bank. Damping reactors are comparable to series reactors with low reactances. Their voltage strength requirements, however, are often higher than those of series reactors. Our damping reactors are used all over the world in various environmental conditions.


FILTER REACTORS


The filter has two functions, namely to produce capacitive reactive power at basic frequency and to filter out harmonics. A harmonic filter is designed to have a small impedance between phase and earth or between the phases at required harmonic frequency. Therefore the harmonic current will flow into the filter and not into the network. Normally each required harmonic frequency has a separate filter circuit. For higher harmonic frequencies a wide-band filter is used. We manufacture filter reactors and capacitors according to the customer´s specification. Our filter reactors may be equipped with off-load tappings to make an accurate tuning possible at required frequency. Regulation is to meet the customer´s demands.


SHUNT REACTORS


Shunt reactors are used to compensate for capacitive reactive power generated by long lightly loaded transmission lines. Shunt reactors are switched on/off by breakers and are normally connected to the tertiary winding of the main transformer. Reactors are available up to 36 kV voltage level and 100 MVA power.

 

CURRENT-LIMITING REACTORS


Current-limiting reactors are mainly used to limit shortcircuit current, i.e. to prevent fault currents from rising to values dangerous for the equipment. Normal types of breakers, cables and equipment can thus be used instead of those with higher short-circuit power rating. This means savings in money.
A series reactor consists of three phase coils, generally placed one on top of another with support insulators
between them. The support insulators provide enough space between phases to ensure that the mutual inductance between the coils is negligible compared to the main inductance. In making the concrete foundations, closed loops in the reinforcement steel must be avoided. The magnetic clearances to metal constructions are normally given in our reactor specification.

 

THYRISTOR CONTROLLED REACTORS


Thyristor controlled reactors, called TCR-reactors, are used in Static var compensation systems. TCR-reactors are similar to the shunt reactors, but the current is continuously controlled by thyristor valves. The three phase reactor is delta connected. Each phase reactor is split into two coils and the thyristors are connected between the coils. TCR-reactors are available up to 36 kV and up to 180 MVA power.

 

 

NEUTRAL-EARTHING REACTORS


A neutral-earthing reactor is connected between the neutral point of a three-phase system and earth. Its
purpose is to limit the line-to-earth current of a directly earthed network or to reduce the line-to-earth current ofan insulated line to a value suitable for protection.