Drive PR-17, ПР17, actuators for circuit breakers load.

Drive PR-17, ПР17, actuators for circuit breakers load.

To control the load break switches used three types actuators: manual (for example, PR-17), manual automatic (PRA-17) and electromagnetic (PE-11C). Drive PR-17 enable / disable load break switches manually and drive GREAT-17 include manually shut off manually or remotely using the solenoid disconnect. Electromagnetic actuator PE-11C provides manual or remote control or remote automatic shut-off.

Manual the inclusion is carried out by moving the arm including the actuator lever bottom up, and mute — the movement of the tripping arm of the lever on top or remotely from the button with closing contact.

Hand drive PR-17 (PRA-17) shown in Fig. 6, and the installation of the load switch with actuator — in Fig.

1 — lever for manual opening,

2 — position,

3 — ground bolt,

4 — arm,

5 — the electromagnet is turned off (only in the drive PRA-17),

6 — latch,

7 — release the dog

8 — sector arm,

9 — thrust plug,

10 — cut-off from tank

The drive to the load switch has a construction similar to the lever actuator of the disconnector, and differs from it is only the presence of a shunt trip mechanisms. The mechanism of the device allows moving parts of load switch to disconnect from parts actuator associated with the handle 4 (see Fig. 7) or disable the core. When the engaged position of the drive sector arm 8 is held by the mechanism shunt trip. Disabling this mechanism is triggered and disconnects the handle 4 from sector 8 of the lever. The handle remains in place, and pie the lever under the action of springs of a switch turns around its axis. This by the way, the speed of the blades of the switch independent of the speed control driven as a shunt trip mechanisms removes the handle from the shaft switch.