PROTECTING DEVICE WITH ELECTRIC INTERLOCK TO PROTECT UPON POWER DISCONNECTION FOR USED UNDERGROUND EXPLOSION-PROOF FREQUENCY CONVERTER

摘要

FIELD: electricity.SUBSTANCE: device contains part that controls switching and part that controls interlock. Part that controls switching contains switching lever (1), sector plate (2) to switch over the breaker and isolated change-over switch (3). Part that controls interlock contains lock button (4), lock installation plate (5) and secondary control point (6). Switching lever (1) is rigidly connected with the sector plate (2) and with isolated change-over switch (3). The lock button (4) is rigidly connected with the lock installation plate (5) and secondary control point (6). Installation pin is secured to the outside surface of the cabinet door. The lock button (4) is electrically connected with the electronic block of the programmable controller and power source. Isolated change-over switch (3) is connected with discharge resistor.EFFECT: stability during use and safety.4 cl, 3 dwg