Product Name: High Voltage Gas SF6 Insulated Current Transformer

Technical Parameters for LVQB-66W(1, 2 or 3)Current Transformers

1 Rated voltage 66 kV

2 Highest voltage for equipment 72.5kV

3 Rated primary current 50A~4000 A

4 Rated secondary current 5 A or 1 A

5 Rated frequency 50 (60) Hz

6 20~50VA (If any other rated output required, We can satisfy it.)

7 Accuracy class and accuracy classes combination

Steady accuracy classes are 0.2S, 0.2, 0.5S, 0.5, 5P, 10P, PR and PX; transient accuracy classes are TPS, TPX, TPY and TPZ. There are 1~7 pcs secondary windings in a CT.

8 Rated operating pressure of the gas SF6 is 0.40 MPa

9 Minimum operating pressure of the gas SF6 is 0.35 MPa

10 Instrument security factor (FS) of measuring class 5 or 10

11 Accuracy limit factor (ALF) of protective class 5, 10, 15, 20, 30 or 40

12 Rated continuous thermal current Icth 1.2In

13 For rated short-time thermal current Ith (rms) and rated dynamic current Idyn (peak), please see Table 1

Table 1

Primary Current (A)	50~1600	2000~4000
Rated Short-time Thermal Current (rms) (kA), 3s	31.5	50
Rated Dynamic Current (Peak) (kA)	79	125

14 Arcing Distance ≥410 (mm)

15 Creepage distance of outer insulation please see Table 2

Table 2

Pollution Protection Class	Class II (W1)	Class III (W2)	Class IV (W3)
Creepage Distance (mm)	≥1450	≥1813	≥2248

Notes: Detailed technical data and outline drawing are provided upon request.