The LMZBJ9-12X is a 12kV indoor single-phase epoxy resin busbar type current transformer designed for precise current measurement, energy metering, and protective relaying in medium-voltage electrical systems. Its epoxy resin casting fully encloses the busbar primary conductor, secondary windings, and annular core, ensuring reliable insulation and mechanical strength.
This model features three secondary windings that can be configured as one measuring winding with two protective windings or two measuring windings with one protective winding, offering versatile application options. The rated primary current ranges from 1000A to 5000A, with selectable secondary currents of 5A or 1A. It is suitable for indoor installations operating at 50Hz or 60Hz and complies with IEC 60044-1 standards.
| Rated transformation ratio (A) | Accuary classes combination | Rated primary current (A) | |||||
| 0.2 | 0.5 | 5P20 | |||||
| 20 | 40 | 40 (20) | |||||
| 1000 | 0.2/0.2 0.5/0.5 0.5/5P20 5P20/5P20 |
30 | 60 | 60 (40) | |||
| 1500 | |||||||
| 2000 3000 4000 5000 |
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| Rated transformation ratio (A) | Rated primary current (A) | ||||||
| 1000 | 0.2/0.2 0.5/0.5 0.5/5P20 5P20/5P20 |
30 | 20/40/20 40/15/15 |
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| 1500 | 20/40/30 30/20/20 |
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| 2000 3000 4000 5000 |
30/60/40 60/30/30 |
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| 30/60/40 60/30/30 |
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| Rated transformation ratio (A) | Rated primary current (A) | ||||||
| 1000 | 0.2/0.2 0.5/0.5 0.5/5P20 5P20/5P20 |
30 | 20/40/20 40/15/15 |
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| 1500 | 20/40/30 30/20/20 |
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| 2000 3000 4000 5000 |
30/60/40 60/30/30 |
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| 30/60/40 60/30/30 |
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