Indoor single-phase epoxy resin casting CT, compliant with GB/T20840.1/2 & IEC61869-1/2, insulation level 12/42/75kV, 50/60Hz, secondary current 5A/1A. Optional primary current ranges:20-200A、300-400A、500-600A、800-1000A、1200-1250A、1500-3150A; richer rated output options for protection winding, net weight 80kg, operating temperature -5℃~+40℃.
Indoor 12kV epoxy-cast current transformer for MV switchgear; suitable for metering and protection up to 3150A primary.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869 / GB/T 20840 |
| Model Code | LZZBJ9-12-225b-4s | 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 through the bushing; secondary terminals are 1S1/1S2 for metering, and 2S1/2S2 for protection if present. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. Follow IEC 61869 terminal conventions.
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: What primary current ranges are available?
A: Optional ranges include 20-200A, 300-400A, 500-600A, 800-1000A, 1200-1250A, 1500-3150A.
Q: Can it 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) |
|---|---|---|---|---|---|
| 200-200 | 0.2(5)/0.5/5P/5P | 20 20 25 20 15 | 150 | 375 | 82 |
| 300 | 0.2(5)/0.5/5P/5P | 20 20 25 20 15 | 31.5 | 80 | 82 |
| 400 | 0.2(5)/0.5/5P/5P | 20 20 25 20 15 | 45 | 112.5 | 82 |
| 500-600 | 0.2(5)/0.5/5P/5P | 20 20 25 20 15 | 63 | 130 | 82 |
| 800-1000 | 0.2(5)/0.5/5P/5P | 30 30 40 30 20 | 80 | 160 | 82 |
| 1200-3150 | 0.2(5)/0.5/5P/5P | 30 30 40 30 20 | 100 | 160 | 82 |
Dimension & outline drawing of LZZBJ9-12-225b-4s — click image to zoom / view original.
