Square epoxy cast zero sequence current transformer for 10kV systems. Available in Φ80 to Φ200 inner diameter specifications. Product performance complies with GB/T 20840.1, 2 and IEC 61869-1, 2. Primary main insulation guaranteed by cable, secondary winding tested. Secondary winding withstands 3kV power frequency voltage to ground for 1 minute. Square epoxy resin cast construction, compact design, easy installation. Used for ground fault protection in medium voltage systems.
Zero sequence CT for 10kV systems, ideal for earth fault protection in MV networks. Suitable for cable diameters Φ80-Φ200.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | IEC 61869-1,2, GB/T 20840.1,2 |
| Model Code | CSJK-80-200 | Factory nameplate marking |
| Primary Voltage | 10kV | Rated voltage test (IEC 61869-1/3) |
| Secondary Voltage | [On Request] | 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) | [On Request] | Power-frequency & lightning impulse withstand |
| Standards | IEC 61869-1,2, GB/T 20840.1,2 | Certified to listed standards |
| Frequency | 50/60Hz | Per IEC 61869-1 |
| Environment | Square epoxy resin cast | Per datasheet limits |
Ideal For
Not Recommended For
For zero sequence CT, connect the primary cable through the window. The secondary terminals are S1 and S2. Ensure the secondary is connected to a protective relay or burden. Never open-circuit the secondary of a CT while energized - hazardous voltage. Ground the secondary winding at one point. For earth fault protection, the CT is typically connected in residual connection with other phase CTs or used as a core-balance CT. Refer to IEC 61869-2 for terminal markings and safety.
Compliant with: IEC 61869-1,2, GB/T 20840.1,2
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What is the insulation level of this CT?
A: The primary voltage is 10kV, and the secondary winding withstands 3kV power frequency voltage to ground for 1 minute. The primary insulation is guaranteed by the cable.
Q: Can this CT be used for metering?
A: No, it is designed for earth fault protection, not for metering or revenue purposes.
Q: What is the inner diameter range?
A: The inner diameter ranges from Φ80 to Φ200, accommodating various cable sizes.
Missing fields are marked [On Request] — never fabricated. M2/M5/M6 verification rows follow IEC 61869 / IEEE C57.13 conventions.
| Model | Rated current ratio (A) | Accuracy class | Rated output (VA) | Rated current ratio (A) | Accuracy class | Rated output (VA) |
|---|---|---|---|---|---|---|
| CSJK-Φ80 CSJK-Φ100 | 50-60/1 | 10P5 | 2.5 | — | — | — |
| 75/1 | 10P5 | 3.75 | 75/5 | 10P5 | 2.5 | |
| 100/1 | 10P10(10P5) | 2.5(5) | 100/5 | 10P10(10P5) | 1.5(3.75) | |
| 150/1 | 10P10(10P5) | 3.75(7.5) | 150/5 | 10P10(10P5) | 2.5(7.5) | |
| 200-300/1 | 10P10(10P5) | 5(10) | 250-300/5 | 10P10(10P5) | 5(10) | |
| 400-600/1 | 10P10(10P5) | 5(10) | 400-600/5 | 10P10(10P5) | 5(10) | |
| CSJK-Φ120 CSJK-Φ160 CSJK-Φ200 | 50-60/1 | 10P5 | 3.75 | — | — | — |
| 75/1 | 10P10(10P5) | 3.75(7.5) | 75/5 | 10P5 | 2.5 | |
| 100/1 | 10P10(10P5) | 7.5(15) | 100/5 | 10P10(10P5) | 3.75(7.5) | |
| 150/1 | 10P10(10P5) | 10(20) | 150/5 | 10P10(10P5) | 5(10) | |
| 200-300/1 | 10P10(10P5) | 10(20) | 250-300/5 | 10P10(10P5) | 7.5(15) | |
| 400-600/1 | 10P10(10P5) | 10(20) | 400-600/5 | 10P10(10P5) | 7.5(15) |
Dimension & outline drawing of CSJK-80-200 — click image to zoom / view original.
