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 primary current:400A、500A、600A、800A、1000A、1200A、1250A; accuracy combinations:0.2S/0.5、0.2S/10P、0.5/10P, rated output:0.2S/0.5S 10VA、0.5 15VA、510P10 15VA、510P15 20/25VA, net weight 19kg, ambient operating temperature -5℃~+40℃.
Indoor 10kV current transformer for medium-voltage switchgear, suitable for metering and protection applications.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LMZZB5-10 | 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
For current transformers, connect primary conductor through the window. Secondary terminals: 1S1-1S2 for metering winding, 2S1-2S2 for protection 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: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of this CT?
A: The insulation level is 12/42/75kV, meaning 12kV system voltage, 42kV power-frequency withstand, and 75kV lightning impulse withstand.
Q: What are the available primary current ratings?
A: Optional primary currents: 400A, 500A, 600A, 800A, 1000A, 1200A, and 1250A.
Q: Can this CT be used outdoors?
A: No, it is designed for indoor use only.
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) 0.2 (5) | Accuracy class & rated output (VA) 0.5 | Accuracy class & rated output (VA) 10P15 | Accuracy class & rated output (VA) 10P20 | Short-time thermal current (kA) | Rated dynamic current (kA) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 20-80 | 0.2(5)/0.5 0.2(5)/0.5/0.5 0.2(5)/10P | 10 | 15 | 20 | 3 | 80/1In | 200/1In | 35 |
| 100 | 0.2(5)/0.5 0.2(5)/0.5/0.5 0.2(5)/10P | 10 | 15 | 20 | 3 | 6 | 15 | 35 |
| 150 | 0.2(5)/0.5 0.2(5)/0.5/0.5 0.2(5)/10P | 10 | 15 | 20 | 3 | 8 | 20 | 35 |
| 200 | 0.2(5)/0.5 0.2(5)/0.5/0.5 0.2(5)/10P | 10 | 15 | 20 | 3 | 12 | 30 | 35 |
| 300 | 0.2(5)/0.5 0.2(5)/0.5/0.5 0.2(5)/10P | 10 | 15 | 20 | 3 | 16 | 40 | 35 |
| 400 | 0.2(5)/0.5 0.2(5)/0.5/0.5 0.2(5)/10P | 10 | 15 | 20 | 3 | 24 | 60 | 35 |
Dimension & outline drawing of LMZZB5-10 — click image to zoom / view original.
