Three-phase and zero-sequence integrated combination current transformer. Suitable for installation in outdoor circuit breakers or ring main units. Used for three-phase and zero-sequence current measurement and protection. Also applicable for zero-sequence current protection of multi-cable circuits. Compliant with IEC 61869 and GB/T 20840 standards. Epoxy resin cast construction, compact design, easy installation. Integrated three-phase + zero-sequence function saves space and cost.
LSXZ is a 12kV outdoor three-phase integrated CT with zero-sequence, ideal for pole-mounted circuit breakers and RMUs.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869, GB/T 20840 |
| Model Code | LSXZ | Factory nameplate marking |
| Primary Voltage | 12kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A or 1A | Ratio check at rated frequency |
| Accuracy Class | 0.2S, 0.5, 5P20, 5P30 | 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 | IEC 61869, GB/T 20840 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | Indoor pillar-type epoxy resin cast | Per datasheet limits |
Ideal For
Not Recommended For
secondary terminals 1S1/1S2 for measurement, 2S1/2S2 for protection (if applicable). Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. For zero-sequence CT, ensure proper polarity and grounding per IEC 61869.
Compliant with: IEC 61869, GB/T 20840
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of LSXZ?
A: 12kV system; power-frequency withstand 42kV; lightning impulse withstand 75kV peak.
Q: Can LSXZ be used indoors?
A: No, it is designed for outdoor pole-mounted applications.
Q: What accuracy classes are available?
A: 0.2S, 0.5, 5P20, and 5P30.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Parameter | Value |
|---|---|
| Product performance complies with standards | GB/T20840.1, 2 and IEC61869-1, 2 standards |
| Rated voltage | 0.72/3kV |
| Rated frequency | 50Hz or 60Hz |
| Rated secondary current | 5A or 1A |
| Ambient temperature | -40℃~+60℃ |
| Altitude | Not exceeding 3000m |
| Pollution degree | Class II |
| Rated continuous thermal current | 120%~120% In |
Dimension & outline drawing of LSXZ — click image to zoom / view original.
