论述了提高双断口真空断路器开断能力的原理，比较了双断口和单断口真空断路器的开断能力。
The mechanism of improving the breaking capacity of vacuum circuit breaker with double breaks is presented in this paper.
合成试验方法在断路器开断能力考核中得到了广泛应用，但就额定电压下的合成关合来说其研究和应用相对较少。
Although synthetic test method has been widely applied in breaking test of circuit-breaker, as synthetic making test under full voltage, it has been relatively less studied and applied.
该文指出整流式故障电流限制器在限流过程中降低了短路电流幅值，改变了短路电流波形，明显地影响到高压断路器的关合开断能力。
The rectifier type FCL not only reduces the amplitude of short circuit currents but also changes their waveform which seriously affects the making and breaking capability of HV circuit breakers.
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