Indoor single-phase epoxy resin casting current transformer complying with GB/T20840.1/2 and IEC61869-1/2 standards, insulation level 12/42/75kV, rated frequency 50/60Hz, secondary rated current 5A or 1A. Optional structural types: conventional 2s, conventional 4s, dual-ratio 2s with secondary tapping; optional primary current covers 20–3150A. Accuracy-class rated outputs differ by structure: 10VA/15VA/20VA/30VA for different accuracy grades; short-time thermal current ranges 12–100 kA, rated dynamic stable current ranges 30–160 kA; corresponding weights:32kg（2s & dual-ratio 2s）、42kg（4s）; ambient operating temperature -5℃~+40℃.
Indoor 12kV epoxy cast CT for MV switchgear; dual-ratio secondary tapping available.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LZZBJ9-12-185h-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
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 of this CT?
A: 12kV system; power-frequency withstand 42kV; lightning impulse withstand 75kV peak.
Q: Can the secondary current be 5A or 1A?
A: Yes, secondary rated current is 5A or 1A as specified.
Q: Is this CT suitable for outdoor use?
A: No, it is indoor type 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) COSφ=0.8 | Short-time thermal current Ith (kA/s) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|
| 20-150 | 0.2/5(5P10) 0.2/5(5P15) 0.2/5(5P20) 0.2/0.5/5(5P10) 0.2/0.5/5(5P15) 0.2/0.5/5(5P20) | 10 15 | 15 | 200/1n | 500/1n |
| 200-300 | 0.2/5(5P10) 0.2/5(5P15) 0.2/5(5P20) 0.2/0.5/5(5P10) 0.2/0.5/5(5P15) 0.2/0.5/5(5P20) | 10 15 | 15 | 45/1n | 100/1n |
| 400 | 0.2/5(5P10) 0.2/5(5P15) 0.2/5(5P20) 0.2/0.5/5(5P10) 0.2/0.5/5(5P15) 0.2/0.5/5(5P20) | 10 15 | 15 | 55/1n | 130/1n |
| 500-600 | 0.2/5(5P10) 0.2/5(5P15) 0.2/5(5P20) 0.2/0.5/5(5P10) 0.2/0.5/5(5P15) 0.2/0.5/5(5P20) | 10 15 | 15 | 63/1n | 130/1n |
| 800-1250 | 0.2/5(5P10) 0.2/5(5P15) 0.2/5(5P20) 0.2/0.5/5(5P10) 0.2/0.5/5(5P15) 0.2/0.5/5(5P20) | 15 20 | 15 | 80/1n | 160/1n |
| 1500-3150 | 0.2/5(5P10) 0.2/5(5P15) 0.2/5(5P20) 0.2/0.5/5(5P10) 0.2/0.5/5(5P15) 0.2/0.5/5(5P20) | 15 20 | 15 | 100/1n | 160/1n |
Dimension & outline drawing of LZZBJ9-12-185h-2s-4s — click image to zoom / view original.
