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、400-500A、600A、800A、1000-1500A、2000-3150A; accuracy combination 0.2S/10P15、0.5S/10P15, multi-grade rated output including 10VA/20VA/25VA. Matched thermal and dynamic withstand parameters for different specifications, net weight 23.5kg, operating ambient temperature -5℃~+40℃.
Indoor 10kV current transformer for medium-voltage switchgear, suitable for metering and protection with dual accuracy classes.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LAJ-10Q | 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 bushing. Secondary terminals: 1S1/1S2 for metering winding, 2S1/2S2 for protection winding. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary circuit at one point only. 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: What accuracy classes are available?
A: Available accuracy combinations are 0.2S/10P15 and 0.5S/10P15, suitable for metering and protection.
Q: Can this CT be used outdoors?
A: No, it is designed for indoor use only, with an ambient temperature range of -5°C to +40°C.
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 | 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 LAJ-10Q — click image to zoom / view original.
