10kV indoor busbar-type epoxy resin cast current transformer. Through-core design for easy installation on busbars. Rated insulation level 12/42/75kV, 50/60Hz, secondary current 5A or 1A. Compliant with IEC 61869 and GB/T 20840 standards. Vacuum epoxy casting process, low partial discharge, reliable performance. Suitable for medium voltage switchgear, customizable ratio and accuracy.
LMZ9-10 is a 10kV indoor busbar-type current transformer with epoxy cast insulation, suitable for medium voltage switchgear applications.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869, GB/T 20840 |
| Model Code | LMZ9-10 | Factory nameplate marking |
| Primary Voltage | 10kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A or 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 | IEC 61869, GB/T 20840 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | Indoor busbar-type epoxy resin cast | Per datasheet limits |
Ideal For
Not Recommended For
For current transformer (CT) wiring: Connect primary busbar through the window. Secondary terminals are 1S1 and 1S2 for the main winding; if dual ratio, additional taps may be present. Ensure secondary is never open-circuited while energized - hazardous voltage can occur. Ground the secondary circuit at one point only, preferably at the CT terminal box, to ensure safety and proper operation. Follow IEC 61869-2 and IEEE C57.13 for terminal markings and connections.
Compliant with: IEC 61869, GB/T 20840
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of LMZ9-10?
A: The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q: Can LMZ9-10 be used outdoors?
A: No, it is designed for indoor use only. Outdoor installation would require additional weatherproofing.
Q: What are the secondary current options?
A: The secondary current can be 5A or 1A, as specified.
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) COSφ=0.8 (0.2 (S)) | Accuracy class & rated output (VA) COSφ=0.8 (0.5 (S)) | Accuracy class & rated output (VA) COSφ=0.8 (5 (10)P10) | Weight (kg) |
|---|---|---|---|---|---|
| 400~800 | 0.2(S) 0.5(S) 5(10)P10 | 3VA | 3VA | 2VA | 5 |
Dimension & outline drawing of LMZ9-10 — click image to zoom / view original.
