Protective reactors

Function
Voltage in industrial power networks is usually distorted and characterized by a high content of higher-order harmonics such as the 3rd, 5th, 7th and subsequent harmonics. Distorted voltage causes distorted current to flow through the capacitors of the power factor correction bank connected directly to the network. Protective reactors protect capacitor banks against overload caused by harmonic currents.

Together with the capacitance of the capacitors, protective reactors form resonant circuits that limit the amplitudes of higher harmonic currents. In the 7% reactance version, the reactors protect the system against currents from the 5th harmonic and above, while in the 14% version they provide protection against currents from the 3rd harmonic and above.

Benefits

Reduction of higher harmonic currents flowing through the capacitor bank
Lower operating temperature of capacitors
Reduction of inrush current in capacitor banks
Extended service life of the power factor correction system

Applications

Power factor correction systems

Typical application diagram

Special execution

Manufacturing a transformer with parameters other than those specified in the catalogue is possible upon prior consultation.

Download catalogue cards

Protective reactor up to 100 kvar

Product code

Product for:

Details:

Design	Chokes are produced according to : EN/IEC 61558-2-20; EN/IEC 60938
Insulation class	F(155^oC) - standard
Climatic class /environmental class	C1/E0 - land design; C2/E1 - maritime design
Ambient temperature	40^oC
Protection degree	IP 00
Attenuation coefficient [p]	14% (f_r-134 Hz)
Frequency	50 Hz
Rated voltage of capacitors	525 V
Rated supply voltage	400 V
Magnetic linearity	I_LIN=1,15*I_n
Thermal current	1,06 x I_n

Technical sketch

Design A

Design B

Dimension table

Technical data for rated voltage of capacitive battery 525V

Type of the choke [QLC/ULC/p-Q_c/UC]	Power of battery [kVAr]	L_N [mH]	I_N [A]	L [mm]	B [mm]	H [mm]	d [mm]	e [mm]	f [mm]	Weigh [kg]	Design
ED3F-1,7/400/14-2,5/525	2,5	49,13	2,4	125	71	141	100	55	5 x 8	2,6	A
ED3F-3,4/400/14-5/525	5	24,57	4,9	155	92	160	130	72	8 x 12	5,2	A
ED3F-6,7/400/14-10/525	10	12,28	9,7	195	102	190	173	82	8 x 11	8,5	A
ED3F-8,4/400/14-12,5/525	12,5	9,83	13,5	210	98	210	173	78	8 x 11	9,7	A
ED3F-10,1/400/14-15/525	15	8,19	14,6	210	105	210	173	85	8 x 11	10,9	A
ED3F-13,5/400/14-20/525	20	6,14	19,5	210	115	210	173	95	8 x 11	14,2	A
ED3F-16,9/400/14-25/525	25	4,91	24,4	240	146	230	198	120	11 x 29	20	A
ED3F-20,2/400/14-30/525	30	4,09	29,2	240	175	210	198	129	11 x 29	23,4	B
ED3F-27/400/14-40/525	40	3,07	39	300	170	270	240	120	11 x 15	27,5	B
ED3F-33,7/400/14-50/525	50	2,46	48,7	300	190	270	240	145	11 x 15	38,2	B
ED3F-40,5/400/14-60/525	60	2,05	58,5	300	200	270	240	160	11 x 15	44,9	B
ED3F-50,6/400/14-75/525	75	1,64	73,1	360	200	310	300	146	11 x 21	54,6	B
ED3F-67,5/400/14-100/525	100	1,23	97,4	360	200	310	300	161	11 x 21	70,2	B

QLC - rated reactive power of L_Ccircuit (choke-capacitor)
ULC - rated voltage of the L_C circuit
p - attenuation coefficient
Q_C - rated reactive power of the capacitive battery
UC - rated voltage of the capacitive battery
L_N - rated inductance of the protective choke
I_N - rated current of the L_C circuit

Note:

Manufacturer reserves the right to make changes resulting from the continuous development of products offered.

If requested in advance, it is possible to manufacture a choke in other version.

For designs with climatic/environmental class C2/E1 the letter "M" ought to be added

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