The drive is GREAT-17, ПРА17 actuators for circuit breakers load.

The drive is GREAT-17, ПРА17drives for circuit breakers load.

1 Manual automatic series drives GREAT have a few modifications. One of them is the drive type PRA-17 (Fig.), designed to control load break switches types of VN-16, GNP-16, VNP-17. The drive has a shunt trip mechanisms to disable switch both manually and automatically, using the built-in electromagnet..

The actuator's weight is 7.2 kg. the Drive has a cast iron the housing 1, in the cheeks which rotates the main axis 2. To the main axis through utaplivajutsja finger is attached to the sector lever 3 connected by a fork 4 and a thrust with the lever on the shaft of the switch. For adjustment of drive connection with the switch lever has a sectorial hole. In the working position the axis rotates together with the lever. On the right side of the main axis of fixed position switch.

On winding lever (lever) 5 there are two axes. One wearing cut-off doggy and 6 the retainer 7, is constantly by a spring. The locking tooth engages its for the locking pin, located between the cheeks of the housing of the actuator. On the other axis winding lever is a latch 8 and lever — lever manual off. Actuator is mounted on the tripping solenoid 9. The actuator may to be equipped with auxiliary alarm contacts KSA.
To enable the switch, press the manual lever of inclusion, which returns the latch out of engagement with the retaining finger. Released the winding lever down until it stops (approximately a 150° angle), turning at the same time around the main axis of the tripping pawl, a latch, and the latch. Latch pie slides on the lever, until you tripped over a dog. In the result formed rigid kinematic connection between the sector lever, a latch, a dog and a winding lever.
The drive is prepared for turning on the switch. To enable winding the lever you need to quickly raise himself and up until it stops. Thus the sector lever rotated by an angle of 100° and includes a load switch and retainer locks the actuator in the engaged position.
A disable switch can be remotely by means of the tripping electromagnet or manual lever manual shut off. When this occurs, clicking on "tail" disable the dog that comes out of engagement with the latch. Hard the kinematic connection ceases to exist and the load switch under the action of its springs off. The main axis of the actuator together with the sector lever and position indicator switch is rotated by an angle of 100°. At the same time turn and auxiliary signal contacts KSA.

Tag: disconnector | help | 6 kV | 10 kV |