Indoor single-phase cable-fixed through-type self-powered current transformer for passive microcomputer integrated protection devices. The built-in power winding generates electric energy via primary current excitation and supplies startup power when primary current exceeds 10% of rated primary current, power factor COSφ=0.8.
Indoor self-powered CT for cable-fixed installations, suited for passive protection systems in RMU applications.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LDZC-10PU | Factory nameplate marking |
| Primary Voltage | 20kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | [On Request] | Ratio check at rated frequency |
| Accuracy Class | 0.2/0.5/3P(6P) | Accuracy test (IEC 61869-2 / IEEE C57.13) |
| Rated Burden | 30VA(0.2),40VA(0.5),100VA(3P) | 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 | [On Request] | Certified to listed standards |
| Frequency | 50Hz/60Hz | Per IEC 61869-1 |
| Environment | [On Request] | Per datasheet limits |
Ideal For
Not Recommended For
For current transformers, never open-circuit the secondary while energized—hazardous voltage may occur. Standard terminal markings: 1S1/1S2 for main secondary, 2S1/2S2 for protection winding. Ground the secondary winding at one point. Ensure power winding connections are correct for self-powering functionality.
Compliant with: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the primary voltage rating?
A: The primary voltage is 20kV.
Q: What accuracy classes are available?
A: Accuracy classes are 0.2/0.5/3P(6P) with rated burdens 30VA, 40VA, and 100VA respectively.
Q: How does the self-powered feature work?
A: The built-in power winding generates energy from primary current when it exceeds 10% of rated primary current, with power factor COSφ=0.8.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Model | Rated primary current I1n (A) | Accuracy class & rated output (VA) COSΦ=0.8 Protection winding10P10 | Accuracy class & rated output (VA) COSΦ=0.8 Power supply winding | Dimensions Φd/ΦD/H |
|---|---|---|---|---|
| LDZC1240-10PU | 50/5 | 1.5 | 5 | 40/125/130 |
| LDZC1240-10PU | 75/5 | 2.5 | 5 | 40/125/130 |
| LDZC1240-10PU | 100/5 | 3.75 | 5 | 40/125/130 |
| LDZC1365-10PU | 200/5 | 3.75 | 5 | 65/130/110 |
| LDZC1365-10PU | 300/5 | 5 | 5 | 65/130/110 |
| LDZC1150-10PU | 400/5 | 5 | 5 | 50/110/100 |
| LDZC1150-10PU | 600/5 | 7.5 | 5 | 50/110/100 |
Dimension & outline drawing of LDZC-10PU — click image to zoom / view original.
