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 covers 20–3150A with the same accuracy grades and rated power values as the series; short-time thermal current ranges 4–31.5kA, rated dynamic stable current ranges 10–130kA; product weight:78kg; ambient operating temperature -5℃~+40℃.
Indoor epoxy cast CT for 35kV systems; suitable for metering and protection in MV switchgear.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LZZBJ9-35-G | 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
secondary terminals 1S1/1S2 (protection winding 2S1-2S2). 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?
A: The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, 75kV lightning impulse.
Q: Can it be used outdoors?
A: No, it is designed for indoor use only.
Q: What secondary currents are available?
A: 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 | Accuracy class & rated output (VA) COSΦ=0.8 | Accuracy class & rated output (VA) COSΦ=0.8 | Accuracy class & rated output (VA) COSΦ=0.8 | Accuracy class & rated output (VA) COSΦ=0.8 | Accuracy class & rated output (VA) COSΦ=0.8 | Short-time thermal current Ith (kA/S) | Short-time thermal current Ith (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 4 | 1 | 10 | 78 |
| 30-40 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 4 | 2 | 10 | 78 |
| 50 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 12 | 1 | 30 | 78 |
| 75 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 16 | 1 | 40 | 78 |
| 100-150 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 25 | 1 | 63 | 78 |
| 200-300 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 31.5 | 1 | 80 | 78 |
| 400-600 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 31.5 | 2 | 80 | 78 |
| 800-1600 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | 31.5 | 4 | 130 | 78 |
| 2000-3150 | 0.2(S)/0.5(S) | 0.2(S)/0.5S | 0.2(S)/5P | 0.2(S)/0.5(S)/5P | 0.2(S)/5P/5P | 0.5(S)/5P/5P | 10 | [On Request] | [On Request] | [On Request] | 78 |
Dimension & outline drawing of LZZBJ9-35-G — click image to zoom / view original.
