Shield UAO (fig. 12004-300-00) is designed for emergency shutdown of external feeders and DGA feeder, intended only for powering SCB devices.

In the shield of the UAO shield there is an emergency power off device, which includes:
- relay;
- a lamp indicating the presence of power in the UAO shield;
- lamp indicating emergency shutdown;
- emergency shutdown button (sealed);
- terminal block for external cable connection.