Current transformers - low voltage measuring... - bus-bar type

Current transformer bus-bar type

The current transformers ISN... type are intended for assembly on the bus-bar circuit. They can be used in the mains at rated voltage up to 1.2 kV; 50 ÷ 60 Hz frequency and can operate in abbient temperature range from 248 K (-25°C) to 323 K (50°C).
The ISN... current transformers are intended for working in indoors under the normal and severe conditions such as ships, mines, chemical industry etc.

The ISN... current transformers are produced in accuracy class 0.2; 0.5; 1; 3 and 0.2S; 0.5S and have a raised rated voltage up to 1.2 kV and test voltage up to 6 kV, which makes them possible for many applications.

The ISN... current transformers are drawn on the bus-bars during the assembly and are held up by the tightening of screws on the base.

Technical data:

Rated primary current		I_pn= 30 ÷ 7500 A
Continuous thermal current		I_pn= ext. 120%; 200% available on request
Rated secondary current		I_sn= 5 A lub 1 A
Rated power		S_2n = 0.5 ÷ 50 VA
Accuract class		0.2; 0,5; 1; 3; CTs ISN type (except CTs ISN 0) in accuracy class 0.2; 0.5 or better can be legalized.
Rated short-time thermal current 1 sec. r.m.s.		I_th = 60 * I_pn
Rated dynamic current		depends on circuit (practically unlimited)
Rated frequency		f = 50 ÷ 60 Hz
Max. voltage		U_m = 0.72 or 1.2 kV
Test voltage		U_p = 3 or 6 kV
Factor security		FS5 (other value available on request)

Type/Technical data	Max bus-bar size	Rated primary current	Rated power	Accuracy class	Rated secondary current
ISN 0 for horizontal bus	20 x 6 mm	20 ÷ 300 A	0.5 ÷ 7.5 VA	0.5; 1; 3; 5	5 A or 1 A
ISN 1 for horizontal bus	20 x 10 mm 30 x 10 mm 40 x 10 mm	50 ÷ 800 A	1 ÷ 15 VA	0.2; 0.5; 1; 3
ISN 2 for horizontal bus	20 x 10 mm 30 x 10 mm 40 x 10 mm	75 ÷ 1000 A	2 ÷ 30 VA	0.2; 0.5; 1; 3
ISN 2 horizontal for bus	50 x 10 mm 60 x 10 mm 60 x 30 mm 2 x 60 x 10 mm	150 ÷ 1250 A	2.5 ÷ 40 VA	0.2; 0.5; 1; 3
ISN 2 for two ranges of primary currents for horizontal bus	40 x 10 mm 50 x 10 mm 60 x 10 mm	100 ÷ 1200 A	2.5 ÷ 20 VA	0.5; 1; 3
ISN 3 for horizontal bus	60 x 10 mm 80 x 10 mm 2 x 60 x 10 mm 2 x 80 x 10 mm	100 ÷ 2000 A	2.5 ÷ 30 VA	0.2; 0.5; 1; 3
ISN 30 for vertical bus	40 x 10 mm 50 x 10 mm 60 x 10 mm 2 x 40 x 10 mm 2 x 50 x 10 mm 2 x 60 x 10 mm	100 ÷ 2000 A	2.5 ÷ 40 VA	0.2; 0.5; 1; 3
ISN 31; 32; 33 for vertical bus	2 x 80 x 10 mm 2 x 100 x 10 mm 2 x 120 x 10 mm	100 ÷ 3000 A	5 ÷ 40 VA	0.2; 0.5; 1; 3
ISN 4 for horizontal bus	2 x 80 x 10 mm 2 x 100 x 10 mm 3 x 80 x 10 mm 3 x 100 x 10 mm	500 ÷ 3000 A	5 ÷ 40 VA	0.2; 0.5; 1; 3
ISN 40; 41; 42; 43; 44 for vertical bus	3 x 60 x 10 mm 3 x 80 x 10 mm 3 x 100 x 10 mm 3 x 120 x 10 mm 3 x 160 x 10 mm	1000 ÷ 5000 A	5 ÷ 40 VA	0.2; 0.5; 1
ISN 4S for horizontal bus	2 x 120 x 10 mm	1000 ÷ 4000 A	5 ÷ 40 VA	0.2; 0.5; 1; 3
ISN 5 for horizontal bus	2 x 140 x 10 mm	2000 ÷ 4000 A	10 ÷ 30 VA	0.2; 0.5; 1 0.2S; 0.5S	5 A

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