POWER SUPPLY 0-15V STEPPED, Each

A special key lock allows the voltage to be locked to a particular level or to a maximum ceiling. 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, e. g. when using lamp bulbs. Slow-blow fuse protection for primary transformer. Additional thermal trip protection for transformer. 5 year warranty.