The LZZBJ9-24-180b/2 and LZZBJ9-24-180b/4 current transformers are 24kV indoor single-phase epoxy resin type devices featuring fully enclosed epoxy resin casting insulation and robust support construction. The primary and secondary windings along with the annular magnetic core are encapsulated within a solid resin body, providing excellent insulation, mechanical strength, and durability.
These lightweight CTs support omni-directional installation and are designed to withstand harsh indoor conditions including humidity and pollution. They are widely used in power systems for accurate current measurement, electric energy metering, and protective relaying at a rated frequency of 50Hz or 60Hz, suitable for equipment with a maximum voltage rating of 17.5(24)kV. Both models comply with IEC 60044-1 and IEC 61869-1 & 2 standards.
| Rated transformation ratio (A) |
Secondary accuracy classes combination | Rated output (VA) |
Measuring current's instrument security factor | Protective currents accuracy limit factor | Rated short-time thermal current (kA/S) |
Rated dynamic current (kA) |
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| Measurng | Protective | ||||||||||||
| 0.2(S) | 0.5 | 10P | |||||||||||
| 20-200/5 | 0.2(S)/0.2(S) 0.2(S)/0.5 0.2(S)/10P 0.5/10P |
10 15 |
15 | 15 | 5 (10) |
10 15 |
150l1n | 37511n | |||||
| 300/5 | 31.5 | 80 | |||||||||||
| 400/5 | 31.5 | 80 | |||||||||||
| 500/5 | 40 | 100 | |||||||||||
| 600/5 | 50 | 125 | |||||||||||
| 800/5 | 20 | 63 | 125 | ||||||||||
| 1000/5 | 80 | 160 | |||||||||||
| 1250/5 | 80 | 160 | |||||||||||
1.Three secondary single ratio
| Rated transformation ratio (A) |
Secondary accuracy classes combination | Rated output (VA) |
FS | ALF | Rated short-time thermal current (KA/S) |
Rated dynamic current (kA) |
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| Measuring | Protective | ||||||||||||
| 0.2(S) | 0.5 | 10P | |||||||||||
| 15-30/5 20-40/5 ...... 500-1000/5 |
0.2S/0.5/10P 0.2/0.5/10P 0.5/0.5/10P 0.2S/10P/10P 0.2/10P/10P 0.5/10P/10P |
15 | 15 |
10 15 |
5 (10) |
10 15 20 |
10011n | 25011n | |||||
| 600-1200/5 | 50 | 105 | |||||||||||
| 750-1500/5 | 63 | 130 | |||||||||||
| 800-1600/5 | 80 | 160 | |||||||||||
| 1000-2000/5 | 80 | 160 | |||||||||||
| 1250-2500/5 | 100 | 200 | |||||||||||
2.Three secondary double ratio
| Rated transformation ratio (A) |
Secondary accuracy classes combination | Rated output (VA) |
FS | ALF | Rated short-time thermal current (KA/S) |
Rated dynamic current (kA) |
|||||||
| Measuring | Protective | ||||||||||||
| 0.2(S) | 0.5 | 10P | |||||||||||
| 15-300/5 | 0.2S/0.5/10P 0.2/0.5/10P 0.5/0.5/10P 0.2S/10P/10P 0.2/10P/10P 0.5/10P/10P |
15 | 15 | 15 20 |
5 (10) |
10 15 20 |
100l1n | 250l1n | |||||
| 400/5~600/5 | 50 | 105 | |||||||||||
| 800-1000/5 | 63 | 130 | |||||||||||
| 1200/5 | 80 | 160 | |||||||||||
| 1500/5 | 80 | 160 | |||||||||||
| 2000/5 | 100 | 200 | |||||||||||
| 2500/5 | 125 | 200 | |||||||||||
