The 500VA – 25kVA “Series 800PI” is a constant voltage transformer with ±2% regulation and power “ride-through” capability. This product protects your sensitive electronic equipment from voltage spikes, noise, impulses, over- and under-voltage conditions, and the effects of damaging harmonic currents. The “Series 800PI” is ideal for industrial factory automation applications where high-powered equipment interferes with vulnerable electronic controls.