35kV W2 outdoor pillar type epoxy resin cast current transformer. Rated insulation level 40.5/95/185kV, 50/60Hz, secondary current 5A or 1A. Multiple accuracy class combinations: 0.2S/0.5S/10P10/10P25. Compliant with IEC 61869 and GB/T 20840 standards. Vacuum epoxy casting, high mechanical strength, excellent insulation performance. Rated primary current 50-1600A, short-time thermal current up to 50kA/4s. Suitable for 35kV power systems, customizable ratio and accuracy.
This is a 35kV outdoor current transformer with protection winding, suitable for metering and protection in 35kV distribution systems.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869, GB/T 20840 |
| Model Code | LZZBJ4-35W2 | Factory nameplate marking |
| Primary Voltage | 35kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A or 1A | Ratio check at rated frequency |
| Accuracy Class | 0.2S, 0.5S, 10P10, 10P25 | 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) | 40.5/95/185kV | Power-frequency & lightning impulse withstand |
| Standards | IEC 61869, GB/T 20840 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | W2 outdoor pillar type epoxy resin cast | Per datasheet limits |
Ideal For
Not Recommended For
For current transformers, never open-circuit the secondary while energized - hazardous voltage. Secondary terminals: 1S1/1S2 for metering winding, 2S1/2S2 for protection winding. Ground the secondary circuit at one point. Follow IEC 61869 for terminal markings and safety.
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 40.5kV system; power-frequency withstand 95kV; lightning impulse withstand 185kV peak.
Q: Can this CT be used for both metering and protection?
A: Yes, it has multiple accuracy classes: 0.2S/0.5S for metering and 10P10/10P25 for protection.
Q: What is the maximum primary current?
A: The rated primary current range is 50-1600A, customizable.
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 | Rated output (VA) | Short-time thermal current Ith (kA/s) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 50;100 | 0.2/0.5/5P/10P/15P | 10 | 50;1/4 | 125;1 | 75 |
| 150;200 | 0.2/0.5/5P/10P/15P | 10 | 20;2 | 50 | 75 |
| 300;400 | 0.2/0.5/5P/10P/15P | 10 | 20;4 | 50 | 75 |
| 600;800 | 0.2/0.5/5P/10P/15P | 10 | 31.5;4 | 80 | 75 |
| 1000 | 0.2/0.5/5P/10P/15P | 10 | 40;4 | 100 | 75 |
| 1500;1600 | 0.2/0.5/5P/10P/15P | 10 | 50;4 | 100 | 75 |
Dimension & outline drawing of LZZBJ4-35W2 — click image to zoom / view original.
