Product introduction

Transformer that converts primary large current into secondary small current (generally 5A or 1A) to supply power to instruments and meters. Current transformers can be divided into measuring transformers, measuring transformers and protection transformers according to their purposes. It can be divided into indoor and outdoor according to the use scenario.
Current transformer for metering: it is used for current metering, with conventional accuracy classes of 0.2S and 0.5S;
Current transformer for measurement: used for current monitoring, with the conventional accuracy class of 0.2 and 0.5;
Current transformer for protection: the transformer that provides signals for relay protection instruments or devices, with protection multiples of P10, P15, etc.
This product is a mainstream current transformer developed by our company, which can meet the needs of the majority of users. The protection multiple is usually P15 and can be up to P20. The maximum primary current can reach 1500A.

Application scenario

The transformer is mainly installed and used in the electric complete equipment, ring network cabinet, switching station, substation and other scenes;
The ambient temperature is between – 5 ℃ and 50 ℃, and the daily average temperature does not exceed 30 ℃;
The altitude shall not exceed 1000m;
The current transformer is allowed to operate for a long time at 1.2 times of the rated current. When the current transformer has primary current passing through, the secondary winding shall not be open circuit, otherwise high voltage will cause personal injury and affect product performance.

Technical parameter

Product standardsGB/T20840.1 General Technical Requirements for Transformer
GB/T20840.2 Supplementary Technical Requirements for Current Transformers
GB/T311.1 Insulation Coordination of High Voltage Transmission and Transformation Equipment
GB/T 16927.1 High Voltage Test Technology Part I General Test Requirementsa

Rated primary current (A)	Accuracy classes combination	Short-time thernal current (kA/s)	Rated dynamic current (kA)	Weight (kg)
5		October 15	0.3	0.75	11
10	0.2(S)/10P10		0.6	1.5
15	0.5(S)/10P10		0.9	2.25
20			1.2	3
25			1.5	3.75
30			1.8	4.5
40			2.4	6
50			3	7.5
60			3.6	9
75			4.5	11.25
80			4.8	12
100			6	15
120			7.2	18
150			9	22.5
200			12	30
250			15	37.5
300			18	45
400			24	60
500			30	75
600			36	90
750			45	112.5
800			48	120
1000			60	150
1200			72	160
1250			75	160

Outline and installation dimension drawing