current transformer Access type CT-2

 current transformer for kwh meter

Basic Parameter

Primary current(A)

Secondary current(mA)

Resistance

Rb(Ω)

Maximum currant(A)

Class

Remark

5

5

20

60

0.1

Direct

5

2.5

20

60

0.1

Anti-direct

10

5

20

120

0.1

Direct

Current error and phase error limited

Class

Current error±(%)

 Phase error( )

0.01In

≥0.05In

0.01In

0.05In

0.2In

1In

2In

3In

Imax

0.1

0.2

0.1

15

8

5

5

5

5

5

Note,between the current 0.2In~Imax,taking the average δe between the maximum and minimum phase error.

δi=δi-δe.(δI, phase error,δI, phase displacement when the working current at i time,δe,average phase displacement)

Half-sinusoid Test

          The energy measurement error is less than 3%

Working Atmosphere

Limiting ambient temperature -40°C~+70°C,Relative humidity (RH) ≤98(25°C),Altitude ≤3000m

Main Electric performance

The withstand voltage between the primary and secondary windings is no less than 3kV and insulation resistance is no less than 1GΩ

Reference Size

(mm)

A

B

C

D

E

F

G

H

I

1

9.2

φ6.2

20

30

17

47

2.2

30

11