This power supply provides a stepped voltage of 0-15V in one-volt steps for both AC and slightly smoothed DC. A special key lock (all units have identical keys) allows the voltage to be locked to a particular level or to a maximum (ceiling). Long switch life time means that voltage can be switched safely at full load without serious contact wear. The continuously rated output of 8.5A, AC or DC , or added sum of 8.5A
The set ceiling or locked voltage will be memorized, even if the unit is switched off and on again. Fully protected, secondary by high speed, micro-processor controlled, resettable electronic trip. Over-current is measured and timed for cases of serious overload and slight overload to decide tripping time This avoids over-sensitive tripping in cases of initial heavy current surge, for example when using lamp bulbs.
Slow-blow fuse protection for primary transformer. Additional Thermal Trip protection for transformer. Schottky barrier diodes are employed for rectification with less voltage drop and power waste.
Please note that these are not regulated power supplies.