| 摘要 |
Invention problem To generate a transient high voltage, which continuously follows the zero crossing of the high-current in the test circuit-breaker, on a test circuit-breaker arranged initially in a high-current circuit, by means of a high-voltage oscillating circuit and by transferring oscillating current with constant parameters from an auxiliary circuit-break er in the high- current circuit as sequence current to the test circuit-breaker, which is consequently located in the high-voltage oscillating circuit. Solution to the problem A high-voltage oscillating circuit (I), connected in parallel with the auxiliary circuit- breaker (B a) by firing the switching spark gap (SG hv) and the oscillating current (i hv) superimposed on the high-current (i hc) with opposite polarity just before t he high-current zero crossing. The spark gap (SG hc) is fired at the artificial current zero, causing: short-circuiting of the high-current source (G), series connection of the high- voltage oscillating circuit with the test circuit-breaker (B t), oscillating current from the auxiliary circuit-breaker is transferred with constant parameters to the tes t circuit-breaker there- in following the eliminated high current. Transient high voltage follows the zero crossing of the synthetic current continuously. Rationalization effects Transformer economized in the high-current circuit - high-current switching spark gap used for two purposes - very high rated voltages in the test circuit-breaker : a second high- voltage oscillating circuit (II) increases the transient voltage rationally - natural short-circuit current, natural transient voltage: proven identical simulation, no need for expensive comparative tests.
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