Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards, insulation level 12/42/75kV, rated frequency 50/60Hz, secondary current 5A or 1A. Optional primary current ranges:20-200A、300A、400A、500-600A、800A、1000A; accuracy combinations of 0.2S/10P、0.5S/10P with rated output:0.2S10VA、0.5S10VA、10P10 15VA、10P15 10VA. Short-time thermal current 80I₁ₙ, dynamic stable current 200I₁ₙ, net weight 16kg, operating ambient temperature -5℃~+40℃.
Indoor 10kV epoxy cast current transformer for medium-voltage switchgear, suitable for metering and protection with 0.2S/0.5S accuracy.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LFS-10G | Factory nameplate marking |
| Primary Voltage | 0.66kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A | Ratio check at rated frequency |
| Accuracy Class | 0.2S/0.5S | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | 10VA | Burden test at rated VA |
| Insulation Type | Dry Epoxy Resin | Dielectric tests per standard |
| Insulation Level (BIL) | [On Request] | Power-frequency & lightning impulse withstand |
| Standards | [On Request] | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
For current transformer: connect primary terminals in series with the line. Secondary terminals: 1S1/1S2 for metering winding (0.2S/0.5S), 2S1/2S2 for protection winding (10P). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869-2 terminal markings.
Compliant with: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of this CT?
A: The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q: Can the secondary current be 1A?
A: Yes, the secondary current can be 5A or 1A as per the description.
Q: What are the accuracy classes available?
A: Accuracy combinations include 0.2S/10P and 0.5S/10P, with rated outputs as specified.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Rated primary current I1n (A) | Accuracy classCombined | Accuracy class & rated output (VA) COSφ=0.8 0.2 (S) | Accuracy class & rated output (VA) COSφ=0.8 0.5 (S) | Accuracy class & rated output (VA) COSφ=0.8 10P10 | Accuracy class & rated output (VA) COSφ=0.8 10P15 | Short-time thermal current I1th (kA/S) | Rated dynamic current I dyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 20-200 | 0.2(S)/10P | 10 | 10 | 15 | 10 | 80/1n | 200/1n | 16 |
| 300 | 0.2(S)/10P | 10 | 10 | 15 | 10 | 21 | 50 | 16 |
| 400 | 0.2(S)/10P | 10 | 10 | 15 | 10 | 24 | 60 | 16 |
| 500-600 | 0.5(S)/10P | 10 | 10 | 15 | 10 | 30 | 72 | 16 |
| 800 | 0.5(S)/10P | 10 | 10 | 15 | 10 | 40 | 80 | 16 |
| 1000 | 0.5(S)/10P | 10 | 10 | 15 | 10 | 50 | 80 | 16 |
Dimension & outline drawing of LFS-10G — click image to zoom / view original.
