Converters AC/DC - current converter

Current converters AC/DC

Current converters are designed for supplying measuring and protective circuits of electrical power devices. Current converters AC/DC transform primary alternating current to rated direct current.

Current converters transform alternating promary current up to 120% value with accuracy ±3% in range from 20% to 120%.

Advantage of our current transformers is rated short-time thermal current (1 second):
I_th = 60 * I_pn.

Secondary circuit of current converter can not be opened.

Caution! Opening the secondary circuit may cause damage!

Informations about other solutions and detailed technical informations are available in our Technical Department:
tel./fax: +48 22 815 67 17
e-mail: ,

Technical data:

Rated secondary direct current		I_sn= 20 mA
Rated primary alternating current		I_pn= 1 ÷ 3000 A
Permanent overload		I_pn= ext. 120%
Rated burden		S_2n = 50 ÷ 750 W
Accuracy		±3%
Rated short-time thermal current 1 sec. r.m.s.		I_th = 60 * I_pn
Rated dynamic current (for converters with primary winding and cable type)l		I_dyn = 2.5 * I_th
Rated dynamic current (for bus bar type converters)		depends on circuit (practically unlimited)
Rated frequency		f = 50 ÷ 60 Hz
Max. voltage		U_m = 0.72 lub 1.2 kV
Test voltage		U_p = 3 lub 6 kV

Type/Technical data	Primary current	Rated secondary direct current	Accuracy
with primary winding
ELA 0d	1 ÷ 20 A	20 mA	±3%
ELA 1d W20	5 ÷ 300 A	20 mA	±3%
cable type
ELA 0d	50 ÷ 150 A	20 mA	±3%
ELA 1d	50 ÷ 600 A	20 mA	±3%
bus-bar type
ISN 1d	50 ÷ 800 A	20 mA	±3%
ISN 2d	100 ÷ 1250 A
ISN 3d	400 ÷ 2000 A
ISN 30d	300 ÷ 2000 A
ISN 31d; ISN 32d	500 ÷ 3000 A
ISN 4d	500 ÷ 3000 A