Technical data chokes


Line reactor conform to EN 61558, EN 5008-1 and -2, EN 50082-1 and -2

Frequency range 50 Hz up to 1 kHz
test voltage winding - core 2,5 kV
good EMC conditions
high thermal stability
Insulationclass B or F
max. ambient temperature 40°C
Fire class UL94V0
Prepared for protection index I
Safety class IP 00
Voltage range 0 - 400 V, other values on request
Varnished twice under vacuum
The given energy is only a guideline value
Current can be chosen, the inductance is determined by type size and energy
Inductance can be chosen, the current is determined by type size and energy
Tolerance of energy +/- 30%
Terminals are shock proof conform VBG4
Flat connectors for bolts or plugs, not shock proof


Uk - calculation of a choke’s voltage drop
The voltage drop of a smoothing coil and thus the voltage reduction of the connected load at the output can be determined as following. The inductive or reactive reactance (XL) dof the smoothing choke can be calculated with the inductance of the choke (L) and the mains frquency (fmains):

XL = ω x L = 2Pi x fmains x L

The voltage drop (Uk) of the smoothing choke can be calculated with the rated current (IN) and the inductive reactance of the choke (XL)
for 1-phase smoothing coils: Uk = IN x XL
for 3-phase smoothing coils: Uk = IN x XL 3

Example:
Calculation of the voltage drop
(Uk) of an one-phase smoothing coil with an inductance of L = 0,3 mH, a current of I = 100 A and a rated voltage of 230 V at f = 50 Hz:

Reactance: XL = ω x L = 2Pi x 50 Hz x 0,3 mH = 0,094 Ω
Voltage drop: Uk = IN x XL = 100 A x 0,094 Ω = 9,4 V
or given as percentage to mains voltage: Uk% = Uk / Umains = 9,4 / 230 = 4%

In an american net with U = 110 V and f = 60 Hz the choke acts as following:
Reactance: XL = ω x L = 2Pi x 60 Hz x 0,3 mH = 0,113 Ω
Voltage drop: Uk = IN x XL = 100 A x 0,113 Ω = 11,3 V
or given as percentage to mains voltage: Uk% = Uk / Umains = 11,3 / 110 = 10,2%

This means the same choke will have more than twice the Uk%, if operated in an american net.

Tauscher chokes are calculated to have a small Uk%. Especially cut cores and cores made of amorphous and nanocrystalline materials have a small Uk% and thus low losses and a very good attenuation of harmonics.


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