The reason is that soonest at the next current zero-crossing the firing pulse of thyristors can be reset.

通常的短路故障电流会大大高于这个倍数，而软启动器的晶闸管本身是没有短路分断能力的。

youdao

The equipment ensures automatic closing at current zero, preset test voltage automatically and the effect is fine.

设备自动保证过电流零点合闸，自动预置试验电压，试验效果好。

youdao

Quality square wave power supply, current zero crossing time is short, arc stability, arc without high frequency stability.

优质方波电源，电流过零时间短，电弧稳定，无需高频稳弧。

youdao

This will require further measures beyond the current zero interest rate policy of the Bank of Japan.

FORBES: Zaikai Recovery and Growth Agenda

In fact, Kansas City Federal Reserve President Thomas Hoenig has repeatedly expressed his desire to increase overnight lending rates to 1% from the current zero to 0.25% range by the end of summer.

FORBES: Fed's Next Move Will Be To Ease Interest Rates

Introduction of this newly designed "normally-off" memory circuit with no passes for current to leak into cuts leak current to zero in both operation and standby without any specific power supply management.

ENGADGET: Toshiba goes perpendicular to solve MRAM's power issues, rethink cache memory