Secondary Disconnects (stabs) The secondary disconnects bring power from the control circuits into the circuit breaker. Photo 4 shows an LVPCB and its secondary disconnects. The typical arrangement ...

Pressing the stop button drops out the SI coil, stopping the motor. Indicator lamps — red for running, green for stopped — can also be used. This basic control circuit forms the basis for much more ...

Directional-control valves are vital in any pneumatic circuit, directing or blocking airflow to control the speed or sequence of operations.

Motor control requires three basic elements: a motor, a drive, and one or more feedback devices. The drive controls current in order to produce torque; drives also commonly control velocity and ...

Kids who fall in love with technology and engineering have never had it better. There's no shortage of websites and tutorial videos and hardware kits meant to teach them the fundamentals of ...