Special current transformer for CGIS gas cabinet, indoor epoxy resin casting type, compliant with GB/T20840.1, GB/T20840.2, IEC61869-1 and IEC61869-2 standards, supporting 12kV and 35kV voltage grades with abundant current specifications.
LZZB9-12-35-168-CGIS is a dry epoxy resin current transformer for CGIS gas-insulated switchgear, suitable for 10kV systems with 50/60Hz. It meets IEC 61869-1/2 and GB/T20840 standards.
| Parameter | Specification | Verification |
|---|---|---|
| Product Type | Current Transformer | [On Request] |
| Model Code | LZZB9-12-35-168-CGIS | 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) | 0.72/3kV | 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, connect secondary terminals 1S1 and 1S2 for the main winding; if a protection winding is present, use 2S1-2S2. Never open-circuit the secondary of a CT while energized - hazardous voltage may occur. Ground the secondary winding at one point. Ensure correct polarity and observe shorting and grounding procedures during installation and maintenance.
Compliant with: [On Request]
S_total = ΣS_instrument + I₂² × (ρ × 2L / A)
Q: What are the insulation levels of this CT?
A: The insulation level is 0.72/3kV, meaning the highest voltage for equipment is 0.72kV, and the power-frequency withstand voltage is 3kV. This is for the low-voltage insulation, not the primary system voltage.
Q: Can this CT be used for both 12kV and 35kV systems?
A: Yes, the description states it supports 12kV and 35kV voltage grades, but the primary voltage specified is 10kV. For higher system voltages, please confirm the specific model and ratings.
Q: Is this CT suitable for outdoor use?
A: No, it is designed for indoor CGIS gas-insulated switchgear applications. Outdoor use would require additional protection against environmental factors.
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) | Accuracy classCombined | Accuracy class & rated output (VA) COSΦ=0.8 12KV | Accuracy class & rated output (VA) COSΦ=0.8 35KV | Short-time thermal current (kA/S) | Rated dynamic current Idyn (kA) | Weight (kg) |
|---|---|---|---|---|---|---|
| 20,30,40 | 0.2/0.2 | 15/15 | 10/10 | 150 I1n | 375 I1n | 55 |
| 50,75,100,150 | 0.2/0.5 | 15/20 | 10/15 | 31.5 | 80 | 55 |
| 200 | 0.2/10P10 | 15/20 | 10/15 | 45 | 112.5 | 55 |
| 300,400,500 | 0.5/10P10 | 20/20 | 15/10 | 63 | 130 | 55 |
| 600,800 | 0.2/0.2 | 20/20 | 15/15 | 80 | 160 | 55 |
| 1000,1200,1250 | 0.2/0.5 | 20/25 | 15/20 | 80 | 160 | 55 |
| 1000,1200,1250 | 0.2/10P10 | 20/20 | 15/15 | 80 | 160 | 55 |
| 1000,1200,1250 | 0.5/10P10 | 25/20 | 20/15 | 80 | 160 | 55 |
Dimension & outline drawing of LZZB9-12-35-168-CGIS — click image to zoom / view original.
