| 摘要 |
<p>The ram moves inside a compression container and is driven by a single-phase asynchronous motor. The latter is in series with safety contact(s) closed when the container is in operative position. The PN push-button contact is bridged by a limit switch contact when the ram is in its TDC. The asynchronous motor (M) is of capacitive type. The switching relay (C2), with switching contacts (C21, C22) for polarisation reversal of the motor, has a self-holding contact (C23) for the switching contacts. In the attraction circuit of the self-holding contact is incorporated a series connection of a second contact (22) of the limit switch with a contact (C11) of a current sensitive relay (C1).</p> |
