Voltage transformers - Polcontact Warszawa

Low voltage, voltage transformers

The use of voltage transformer , enabling the indirect measurement of voltage , has on aim:

- assurance the staff operating measuring instruments and relays in the switching station safe conditions of the work
- enabling the standardization of measuring instruments and relays

Voltage transformers are designed for supplying measuring and protective circuits of electrical power devices.

a)Low voltage, voltage transformers US 1,2 type

Type I					Type II
Rated voltage			Accuracy class	Rated power	Rated voltage			Accuracy class	Rated power
primary	test	secondary			primary	test	secondary
V	kV	V	-	VA	V	kV	V	-	VA
480 : √3	3	100 : √3	0.2	1 ÷ 5	1000	6	100	0.2	1 ÷ 2.5
690 : √3	6				100 220 230 380 400 500 600	3	100 110 220 230	0.5	5 ÷ 10
1200 : √3	6			1 ÷ 2.5
100 : √3 220 : √3 230 : √3 380 : √3 400 : √3 500 : √3 600 : √3	3	100 : √3 110 : √3 220 : √3 230 : √3	0.5	5 ÷ 10
			1	5 ÷ 20				1	5 ÷ 20
660 : √3 690 : √3 750 : √3 1000 : √3 1140 : √3 1200 : √3	6				660 690 750 1000 1140 1200	6
			3	5 ÷ 30				3	5 ÷ 30

Example of order :
I. Voltage transformers US 1,2 type; 400:√3/100:√3 V/V; rated power 10 VA; accuracy class 0.5; test voltage U_p=3 kV
II. Voltage transformers US 1,2 type; 1000/100 V/V; rated power 15 VA; accuracy class 1; test voltage U_p=6 kV

Attention! Other parameters available on request.

b) Low voltage, voltage transformers US 1,2m type

Technical data:

Type I					Type II
Rated voltage			Accuracy class	Rated power	Rated voltage			Accuracy class	Rated power
primary	test	secondary			primary	test	secondary
V	kV	V	-	VA	V	kV	V	-	VA
100 : √3 220 : √3 230 : √3 380 : √3 400 : √3 500 : √3 600 : √3	3	100 : √3 110 : √3 220 : √3 230 : √3	0.5	2.5	100 220 230 380 400 500 600	3	100 110 220 230	0.5	2.5
			1	2.5 ÷ 3.75				1	2.5 ÷ 3.75
660 : √3 690 : √3 750 : √3 1000 : √3	6				660 690 750 1000	6
			3	2.5 ÷ 7.5				3	2.5 ÷ 7.5

Example of order :
I. Voltage transformers US 1.2m type; 400:√3 / 100:√3 V/V; rated power 2.5 VA; accuracy class 0.5; test voltage U_p=3 kV
II. Voltage transformers US 1,2m type; 1000 / 100 V/V; rated power 7.5 VA; accuracy class 1; test voltage U_p=6 kV

Attention! Other parameters available on request.

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