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 rated current 5A or 1A. Optional primary current ranges:20-100A、150A、200-300A、400-800A、1000-1250A; accuracy combination 0.2S/10P、0.5S/10P with rated output 10VA/15VA/20VA/25VA. Short-time thermal current 150I₁ₙ, dynamic stable current 375I₁ₙ, net weight 19kg, operating ambient temperature -5℃~+40℃.
Indoor 10kV cast resin current transformer for MV switchgear, suitable for metering and protection up to 1250A.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LFZJ1-10 | Factory nameplate marking |
| Primary Voltage | 10kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A/1A | Ratio check at rated frequency |
| Accuracy Class | [On Request] | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | [On Request] | Burden test at rated VA |
| Insulation Type | Dry Epoxy Resin | Dielectric tests per standard |
| Insulation Level (BIL) | 12/42/75kV | Power-frequency & lightning impulse withstand |
| Standards | [On Request] | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | Ambient: -5℃~+40℃ | Per datasheet limits |
Ideal For
Not Recommended For
connect primary through the window; secondary terminals are 1S1/1S2 for metering, and 2S1/2S2 for protection if applicable. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point.
Compliant with: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of this CT?
A: 12kV system; power-frequency withstand 42kV; lightning impulse withstand 75kV peak.
Q: What are the available accuracy combinations?
A: 0.2S/10P and 0.5S/10P with rated outputs 10VA, 15VA, 20VA, or 25VA.
Q: Can this CT be used outdoors?
A: No, it is designed for indoor use only.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Rated primary current (A) | Accuracy classCombined | Accuracy class & rated output (VA) COSφ=0.8 | Short-time thermal current (kA) | Rated dynamic current (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 20-100 | 0.2(S)/5P10 | 10 10 15 | 150 1r | 375 1r | 19 |
| 150 | 0.2(S)/5P10 | 10 10 15 | 16 | 40 | 19 |
| 200-300 | 0.2(S)/5P10 | 10 10 15 | 20 | 50 | 19 |
| 400 | 0.2(S)/5P10 | 10 10 15 | 31.5 | 80 | 19 |
| 600 | 0.2(S)/5P10 | 10 10 15 | 40 | 100 | 19 |
| 1000-1250 | 0.2(S)/5P10 | 15 20 25 | 60 | 150 | 19 |
Dimension & outline drawing of LFZJ1-10 — click image to zoom / view original.
