| 摘要 |
FIELD: electricity. ^ SUBSTANCE: device of transformer oil leakage indication includes temperature sensor (2) with output connected to calculator (4) input. Additionally the deice includes pressure sensor (1), logical unit (3), first and second comparator (5, 6). Pressure sensor output is connected to first inputs of logical unit, calculator, first and second comparators. Temperature sensor is connected to second inputs of logical unit and calculator. Third input of logical unit is connected to 'filling' signal source (7), first output of logical unit is connected to third input of calculator, second output of logical unit is connected to fourth input of calculator, third output of logical unit is connected to fifth input of calculator. First output of calculator is connected to second input of first comparator, second output of calculator is connected to second input of second comparator. First and second comparator outputs are connected to alarm device (11). ^ EFFECT: transformer oil leakage indication at oil level exceeding minimum value, reduced cost of device due to level indicator replacement with oil pressure sensor in expansion reservoir. ^ 2 cl, 3 dwg |
