| 摘要 |
<p>In the closed condition of the contactor (A) an auxiliary contact (A') short-circuits the resistor (R) connecting one pole of the AC supply to a rectifier bridge (P). The DC output is applied to the contactor either directly or via a Zener diode (Z) according to the setting of a two-position switch (K). With the Zener diode in circuit, recirculation of current after interruption is stopped abruptly for rapid release of the contactor. The alternative switch setting allows current to circulate for about 1 second, affording delayed release.</p> |
