The SSAC WVM611 and SSAC WVM911 series of motor protection is discontinued and now OBSOLETE.
Potential replacement products are the Littelfuse DLMUBRAAA and DLMUHBRAAA series monitors.
The SSAC WVM911AL Series provides protection against premature equipment (motor) failure caused by voltage faults on the 3 Phase Line. The WVM's microcontroller design provides reliable protection even if regenerated voltages are present. It combines dependable fault sensing with a 10 fault memory and a 6 LED status display. Part instrument, part control, the WVM protects your equipment when you're not there and displays what happened when you return. The WVM is fully adjustable and includes time delays to prevent nuisance tripping and improve system operation.
Time delays include a 0.25 to 30 s adjustable trip delay, an adjustable 0.25 to 64 m (in 3 ranges) restart delay, plus a unique 3 to 15 s true random start delay. The random start delay prevents voltage sags caused by simultaneous restarting of numerous motor loads after a power outage. The TSSWVM911AL monitors voltages of 400-480, has a switch selectable automatic restart upon fault trip with an adjustable restart delay of .25 seconds to 64 seconds. Littelfuse SSAC p/n is WVM911AL
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