Indoor single-phase epoxy resin casting current transformer, compliant with GB/T20840.1/2 and IEC61869-1/2 standards; rated insulation level 12/42/75kV, rated frequency 50/60Hz, secondary rated current 5A or 1A. Four optional structural types are available: conventional 2s, dual-ratio 2s with secondary tapping, conventional 4s, dual-ratio 4s with secondary tapping. Optional primary current covers 20–1250A; accuracy-class rated outputs: 0.2(S):10VA, 0.5(S):10VA, 5(10)P10:15VA, 5(10)P15:15VA; short-time thermal current ranges 7.5–100kA, rated dynamic stable current ranges 25–160kA; corresponding weights:23kg、24.5kg、37kg for different structures; operating ambient temperature: -5℃~+40℃.
Indoor 12kV current transformer for MV switchgear, metering and protection. Suitable for 10kV systems with 50/60Hz.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LZZBJ9-12-150b-2s-4s | 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 through bushing; secondary terminals 1S1/1S2 for metering, 2S1/2S2 for protection (if dual-ratio). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary circuit at one point only. 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: 12kV system; power-frequency withstand 42kV; lightning impulse withstand 75kV peak.
Q: Can this CT be used outdoors?
A: No, it is designed for indoor use only.
Q: What accuracy classes are available?
A: 0.2S, 0.5S for metering; 5P10, 5P15 for protection.
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) | Short-time thermal current (kA/s) | Rated dynamic current (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 20-200 | 0.2(5)/0.5(5) | 10 10 15 15 | 150/1 | 375/1 | — |
| 300-400 | 0.2(5)/5P10 | 10 10 15 15 | 31.5 | 80 | — |
| 500 | 0.2(5)/5P15 | 10 10 15 15 | 31.5 | 80 | — |
| 600-800 | 0.2(5)/5P15 | 10 10 15 15 | 80 | 160 | — |
| 1000-1250 | 0.2(5)/5P20 | 10 10 15 15 | 100 | 160 | — |
Dimension & outline drawing of LZZBJ9-12-150b-2s-4s — click image to zoom / view original.
