Indoor epoxy resin casting current transformer complying with GB/T20840.1, GB/T20840.2, IEC61869-1 and IEC61869-2 standards, rich primary current specifications and multi-type accuracy grades optional for different application scenarios.
Indoor epoxy resin CT for 12kV systems; suitable for measurement and protection in RMU applications.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | GB/T20840.1, GB/T20840.2, IEC61869-1, IEC61869-2 |
| Model Code | LMZ8-10 | Factory nameplate marking |
| Primary Voltage | 12/42/75 kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | 5A or 1A | Ratio check at rated frequency |
| Accuracy Class | 0.2S, 0.5, 10P20, 10P10 | 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) | [On Request] | Power-frequency & lightning impulse withstand |
| Standards | GB/T20840.1, GB/T20840.2, IEC61869-1, IEC61869-2 | Certified to listed standards |
| Frequency | 50Hz or 60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
connect secondary terminals 1S1/1S2 for measurement, and 2S1/2S2 for protection if dual-winding. 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: GB/T20840.1, GB/T20840.2, IEC61869-1, IEC61869-2
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the primary voltage rating?
A: The primary voltage is 12/42/75 kV, indicating a 12kV system with 42kV power-frequency and 75kV lightning impulse withstand.
Q: What secondary ratings are available?
A: Secondary current is 5A or 1A, as specified.
Q: What standards does it comply with?
A: It complies with GB/T20840.1, GB/T20840.2, IEC61869-1, and IEC61869-2.
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) | Measuring class Current Transformer 0.2S | Measuring class Current Transformer 0.5 | Protection Current Transformer 10P20 | Protection Current Transformer 10P10 | Dual-winding Current Transformer 0.2S | Dual-winding Current Transformer 0.5 | Dual-winding Current Transformer 10P10 | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 50/1 | — | 1.5 | — | 1.5 | — | — | — | 6 |
| 75/1 | — | 2.5 | — | 2.5 | — | — | — | 6 |
| 100/1 | 1.5 | 3.75 | 1.5 | 3.75 | — | 1.5 | 1.5 | 6 |
| 150/1 | 2.5 | 5 | 2.5 | 5 | — | 2.5 | 1.5 | 6 |
| 200/1 | 3.75 | 7.5 | 3.75 | 7.5 | 2.5 | 3.75 | 2.5 | 6 |
| 300/1 | 5 | 10 | 5 | 10 | 3.75 | 5 | 3.75 | 6 |
| 400/1 | 7.5 | 15 | 7.5 | 15 | 5 | 7.5 | 5 | 6 |
| 500/1 | 10 | 20 | 10 | 20 | 7.5 | 10 | 7.5 | 6 |
| 50/5 | — | — | — | 1.5 | — | — | — | 6 |
| 75/5 | — | 2.5 | — | 2.5 | — | — | — | 6 |
| 100/5 | — | 3.75 | 1.5 | 3.75 | — | — | 1.5 | 6 |
| 150/5 | 2.5 | 5 | 2.5 | 5 | — | 2.5 | 1.5 | 6 |
| 200/5 | 3.75 | 7.5 | 3.75 | 7.5 | 2.5 | 3.75 | 2.5 | 6 |
| 300/5 | 5 | 10 | 5 | 10 | 3.75 | 5 | 3.75 | 6 |
| 400/5 | 7.5 | 15 | 7.5 | 15 | 5 | 7.5 | 5 | 6 |
| 500/5 | 10 | 20 | 10 | 20 | 7.5 | 10 | 7.5 | 6 |
Dimension & outline drawing of LMZ8-10 — click image to zoom / view original.
