VARIOspeed® Grinder Duplex Control Panel

The Duplex VARIOspeed® Grinder Control Panels are available for single-phase or for three-phase incoming power. Both versions are designed to control two three phase sewage grinder pumps in level control applications. The TPC-X level controller is used with a transmitter to monitor the tank level and activate the Variable Frequency Drives (VFDs). The TPC-X controller provides automatic pump alternation, lead/lag operation, high and low level alarms, seal fail and thermal cutoff protection. If a high level alarm condition occurs it activates the audible/visual alarm system. Each pump is controlled by a VARIOspeed® Grinder VFD and is able to reverse on a pump start and/or stop to clear any debris in the impeller. In addition, the panel can detect high-amp conditions during pump run, indicative of clogging, and automatically reverse the impeller. The process is momentarily and repeatedly until the binding material has been shredded to a size that can easily pass through the pump. This control method reduces clogging and potential failure resulting from a locked door.