| 摘要 |
<p>PURPOSE:To reduce the cost of a testing device by connecting one terminal of the 2nd auxiliary breaker part to the coupling point between the 1st auxiliary breaker part and a breaker part to be tested without exposing it to an atmosphere. CONSTITUTION:The part 1 to be tested, the 2nd auxiliary breaker part 2, the 2nd auxiliary breaker part 29, small-sized bushings 25 and 26, a normal bushing 27, an earth tank 20, etc., are provided. Further, one point of a double-break disconnector is used as the breaker part 1 and the other is used as the breaker part 2. Further, the bushings 25 and 26, the bushing 27 which is tolerant to the peak value of a four-parameter transient recovery voltage (TRV), a bushing 32 which is tolerant to at least the initial peak value of the TRV, etc., are provided. Further, the breaker part 29 is arranged in SF6 gas of several atmospheres equal to that of the breaker parts 1 and 2 in the tank 20. Thus, testing bushings are reduced and part or the whole of the tank is saved, so the cost of the tank is reduced.</p> |
