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:20-200A、300A、400-600A、800A、1000A; accuracy combination 0.2S/10P10、0.5S/10P10, rated output:0.2/0.5 class 10VA, 10P10 15VA. Short-time thermal current 90I₁ₙ, dynamic stable current 160I₁ₙ, net weight 14.5kg, operating ambient temperature -5℃~+40℃.
Indoor 10kV cast-resin current transformer for MV switchgear, 0.66kV primary, 5A secondary, accuracy 0.2S/0.5S.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LA-10Q | 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 | 5VA | 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 (CT) wiring: connect primary terminals in series with the line. Secondary terminals are 1S1/1S2 for the metering winding (0.2S/0.5S) and 2S1/2S2 for the protection winding (10P10). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Ensure rated burden does not exceed 10VA for metering and 15VA for protection. 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 highest voltage for equipment, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q: Can this CT be used for both metering and protection?
A: Yes, it has dual accuracy classes: 0.2S/0.5S for metering and 10P10 for protection, with separate secondary windings.
Q: What is the short-time thermal current rating?
A: The short-time thermal current is 90 times the rated primary current (90I₁ₙ), and the dynamic stable current is 160I₁ₙ.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Model | Rated primary current I1n (A) | Accuracy classCombined | Accuracy class & rated output (VA) COSφ=0.3 0.2S/0.5S | Accuracy class & rated output (VA) COSφ=0.3 0.2 | Accuracy class & rated output (VA) COSφ=0.3 0.5 | Accuracy class & rated output (VA) COSφ=0.3 10P10 | Accuracy class & rated output (VA) COSφ=0.3 10P15 | Short-time thermal current I1th (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| LA-10(Q) | 20-200 | 0.2(S)/10P10 0.5(S)/10P10 | 10 | 10 | 10 | 15 | — | 90 I1n | 160 I1n | 14.5 |
| LA-10(Q) | 300 | 0.2(S)/10P10 0.5(S)/10P10 | 10 | 10 | 10 | 15 | — | 22.5 | 40.5 | 14.5 |
| LA-10(Q) | 400-600 | 0.2(S)/10P10 0.5(S)/10P10 | 10 | 10 | 10 | 15 | — | 30 | 55 | 14.5 |
| LA-10(Q) | 800 | 0.2(S)/10P10 0.5(S)/10P10 | 10 | 10 | 10 | 15 | — | 40 | 72 | 14.5 |
| LA-10(Q) | 1000 | 0.2(S)/10P10 0.5(S)/10P10 | 10 | 10 | 10 | 15 | — | 50 | 90 | 14.5 |
| LAJ-10(Q) | 20-200 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 10 | 10 | 15 | — | 120 I1n | 215 I1n | 23.5 |
| LAJ-10(Q) | 300 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 10 | 10 | 15 | — | 30 | 55 | 23.5 |
| LAJ-10(Q) | 400-500 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 10 | 10 | 15 | — | 40 | 72 | 23.5 |
| LAJ-10(Q) | 600 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 10 | 10 | 15 | — | 40 | 72 | 23.5 |
| LAJ-10(Q) | 800 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 10 | 10 | 15 | — | 40 | 72 | 23.5 |
| LAJ-10(Q) | 1000-1500 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 20 | 20 | 25 | — | 50 | / | 23.5 |
| LAJ-10(Q) | 2000-3150 | 0.2(S)/10P15 0.5(S)/10P15 | 10 | 20 | 20 | 25 | — | 50 | / | 23.5 |
Dimension & outline drawing of LA-10Q — click image to zoom / view original.
