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| 1. | phase-unbalance relay |
| 相位失衡继电器 |
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| 2. | negative phase relay |
| 逆相继电器 |
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| 3. | open phase relay |
| 开相继电器 |
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| 4. | phase balance relay |
| 相位平衡继电器 |
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| 5. | under-voltage reverse phase relay |
| 欠压反相继电器 |
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| 6. | phase rotation relay |
| 相位旋转继电器 |
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| 7. | under-voltage open phase relay |
| 欠压开相继电器 |
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| 8. | phase-sequence relay |
| 相序继电器 |
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| 9. | phase-reversal relay |
| 反相继电器 |
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| 10. | phase protective relay |
| 相位保护继电器 |
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