| 摘要 |
PURPOSE:To provide a highly accurate balance relay which does not respond to apparent imbalance caused by the error between two electrical amounts and the error of an input converter. CONSTITUTION:The balance relay comprises means (multiplying means 14 for multiplying a second input by a balance operation coefficient, i.e., the ratio A0/B0 between initial amounts A0, B0 of first and second inputs, to correct the second input, and means(imbalance value calculating means 16 and level deciding means 17) for detecting an imbalanced state based on the difference between the first input and the corrected second input. |
