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 50Hz/60Hz, secondary rated current 5A or 1A. Optional primary current ranges:10-75A、100A、150A、200A、300A、400A、500A、600A; accuracy classes 0.2S/0.5S with rated output 10VA, matched short-time thermal current and rated dynamic current for each specification. Net weight 8kg, applicable temperature range -5℃~+40℃, widely used for metering in medium-voltage switchgears.
Indoor epoxy resin current transformer for 10kV systems, suitable for metering and protection in medium-voltage switchgear.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869 / GB/T 20840 |
| Model Code | LZZ-10Q | Factory nameplate marking |
| Primary Voltage | 0.66kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A/1A | Ratio check at rated frequency |
| Accuracy Class | 0.2/0.5/1.0 | 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) | [On Request] | Power-frequency & lightning impulse withstand |
| Standards | IEC 61869 / GB/T 20840 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
Connect primary terminals P1/P2 in series with the line. Secondary terminals: 1S1/1S2 for metering winding, 2S1/2S2 for protection winding (if present). Ensure secondary is never open-circuited while energized - hazardous voltage may occur. Ground the secondary circuit at one point only. Follow IEC 61869-2 terminal markings.
Compliant with: IEC 61869 / GB/T 20840
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 this CT be used for outdoor applications?
A: No, it is designed for indoor use only. Outdoor use requires additional protection against moisture and environmental factors.
Q: What are the available secondary currents?
A: The secondary rated current is 5A or 1A, selectable based on the application.
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)) | Short-time thermal current Ith (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|
| 10-75 | 0.2(S) 0.5(S) | 10 | 10 | 100 I1n | 250 I1n | 8 |
| 100 | 0.2(S) 0.5(S) | 10 | 10 | 8 | 20 | 8 |
| 150 | 0.2(S) 0.5(S) | 10 | 10 | 12 | 30 | 8 |
| 200 | 0.2(S) 0.5(S) | 10 | 10 | 16 | 40 | 8 |
| 300 | 0.2(S) 0.5(S) | 10 | 10 | 24 | 60 | 8 |
| 400 | 0.2(S) 0.5(S) | 10 | 10 | 30 | 75 | 8 |
| 500 | 0.2(S) 0.5(S) | 10 | 10 | 40 | 100 | 8 |
| 600 | 0.2(S) 0.5(S) | 10 | 10 | 40 | 100 | 8 |
Dimension & outline drawing of LZZ-10Q — click image to zoom / view original.
