Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards; rated insulation level 40.5/95/185kV, rated frequency 50/60Hz, rated secondary current 5A or 1A. Optional primary current:20–2500A; accuracy output:10VA(0.2S/0.5S),15VA(0.5),30VA(5P10),20VA(5P15),15VA(5P20); thermal current 4–31.5kA, dynamic current 10–130kA; weight 70kg; ambient temperature -5℃~+40℃.
LZZBJ9-35A is a 35kV indoor epoxy cast current transformer for medium-voltage switchgear, suitable for metering and protection. It is not for outdoor or high-voltage applications.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LZZBJ9-35A | 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 in series with the line. 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 winding at one point. 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 40.5kV system; power-frequency withstand 95kV; lightning impulse withstand 185kV peak.
Q: Can this CT be used outdoors?
A: No, it is designed for indoor use only.
Q: What are the available secondary currents?
A: The secondary current is 5A or 1A.
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)/0.5S | Accuracy class & rated output (VA) COSφ=0.8 0.5 | Accuracy class & rated output (VA) COSφ=0.8 5P10 | Accuracy class & rated output (VA) COSφ=0.8 5P15 | Accuracy class & rated output (VA) COSφ=0.8 5P20 | Short-time thermal current Ith (kA/S) kA | Short-time thermal current Ith (kA/S) s | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 4 | 1 | 10 | 70 |
| 30-40 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 4 | 2 | 10 | 70 |
| 50 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 12 | 1 | 30 | 70 |
| 75 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 16 | 1 | 40 | 70 |
| 100-150 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 25 | 1 | 63 | 70 |
| 200-300 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 31.5 | 1 | 80 | 70 |
| 400-600 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 31.5 | 2 | 80 | 70 |
| 800-1600 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | 31.5 | 4 | 130 | 70 |
| 2000-2500 | 0.2/0.5 0.2/5P 0.5/5P | 10 | 15 | 30 | 20 | 15 | [On Request] | [On Request] | [On Request] | [On Request] |
Dimension & outline drawing of LZZBJ9-35A — click image to zoom / view original.
