VOLTAGE AND CURRENT LIMITING POWER SUPPLY

摘要

A circuit (10) delivers power to a load (11) at a predetermined voltage and current. The circuit (10) limits the voltage and current available at the load (11) in the event that the load (11) becomes either detached from the circuit or short circuited to facilitate safe operation of the load (11) in an explosive environment such as a paint spray booth. The current is limited by a constant current source (19) and the voltage is limited either by the maximum output voltage from the constant current source or by a zener barrier circuit (24).