- Contact Person : Mr. Zhang David
- Company Name : Guangdong Sihui Instrument Transformer Works Co., Ltd.
- Tel : 86-758-3233661,13902367376
- Fax : 86-758-3233679
- Address : Guangdong,Sihui,Dong Cheng District,Sihui,Guangdong,P.R.China
- Country/Region : China
- Zip : 526200
SF6 Current Transformers
Detailed Product Description
Technical Parameters for LVQB3-110W(1~3) Current Transformers
1 Rated voltage 110 kV
2 Highest voltage for equipment 126 kV
3 Rated primary current 100 A~4000 A
4 Rated secondary current 5 A or 1 A
5 Rated frequency 50 (60) Hz
6 Rated output 20~50 VA (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 1~6 pcs secondary windings in a CT.
8 Rated operating pressure of the gas SF6 is 0.40 MPa
9 Minimun 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 or 30
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) | 100~250 | 300~800 | 1000~2500 | 3000~4000 |
Rated Short-time Thermal Current (rms) (kA), 3s | 21 | 31.5 | 42 | 50 |
Rated Dynamic Current (Peak) (kA) | 52.5 | 80 | 105 | 125 |
14 Arcing distance ≥1010 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 Distancemm | ≥2520 | ≥3150 | ≥3906 |
