35kV A indoor 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.
LZZBJ4-35A is a 35kV indoor epoxy cast 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 | LZZBJ4-35A | 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 | A indoor pillar type epoxy resin cast | Per datasheet limits |
Ideal For
Not Recommended For
Connect primary through bushing. Secondary terminals: 1S1/1S2 for metering, 2S1/2S2 for protection. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary circuit at one point. Follow IEC 61869 terminal markings.
Compliant with: IEC 61869, GB/T 20840
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of LZZBJ4-35A?
A: Rated insulation level is 40.5kV system, power-frequency withstand 95kV, lightning impulse withstand 185kV peak.
Q: What accuracy classes are available?
A: Metering: 0.2S or 0.5S; Protection: 10P10 or 10P25.
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 I1n (A) | Accuracy classCombined | Accuracy class & rated output (VA) 0.2/0.5 | Accuracy class & rated output (VA) 0.5 | Accuracy class & rated output (VA) 10P10 | Accuracy class & rated output (VA) 10P20 | Short-time thermal current Ith (kA/s) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 50-100 | 0.2/5(0.5/5)10P10P 0.2/5(0.5/5)10P10P | 10 | 20 | 25 | 15 | 50 1n/4 | 125 1n | 75 |
| 150-200 | 0.2/5(0.5/5)10P10P 0.2/5(0.5/5)10P10P | 10 | 20 | 25 | 15 | 20/2 | 40 | 75 |
| 300-500 | 0.2/5(0.5/5)10P10P 0.2/5(0.5/5)10P10P | 10 | 20 | 25 | 15 | 31.5/4 | 80 | 75 |
| 600-800 | 0.2/5(0.5/5)10P10P 0.2/5(0.5/5)10P10P | 10 | 20 | 25 | 15 | 40/4 | 100 | 75 |
| 1000-1500 | 0.2/5(0.5/5)10P10P 0.2/5(0.5/5)10P10P | 10 | 20 | 25 | 15 | 50/4 | 100 | 75 |
Dimension & outline drawing of LZZBJ4-35A — click image to zoom / view original.
