A polished aluminum inner door is provided to mount control components such as switches, pilot lights, time meters, breaker handles, etc.; for the safety of the operators when accessing the system.

A wide range of options are available on power components and control functions and accessories.

The panel can be customized to your application per your specifications.

Most systems are designed for a common "pump( s) off"; level. However, they can be designed for "first on- first off"; or each pump can be operated on independent levels. As the level rises in the wet well, the "pump( s) off"; float tilts, setting up the pump( s) off elevation.

As the level continues to rise, the "lead pump on" float switch tilts turning on the appropriate relay. Contacts of this relay lock in the relay coil to the "pumps off" float. At the same time, normally open contacts close to supply 120 VAC through the alternator and HOA switch to the motor starter.

As the level continues to rise and pump #1 is running, the "lag pump on" float tilts and turns on pump #2. A relay is energized and locked into the "pumps off" float. A normally open contact supplies 120 VAC through the alternator and HOA to the motor starter coil. Pump #2 will now run until the "pumps off" float opens.

If the "high level alarm" float tilts, the alarm circuits will function. If the system includes an alarm horn, an alarm silence switch will silence the horn but the alarm light will flash until the condition no longer exists.

Each time the "pumps off" float opens, the alternator will sequence to allow the next pump to run and equalize run time on the units.

Intrinsically Safe Circuits
Intrinsically safe circuits operate the same as 24 VAC circuits except that the floats will operate at levels that will not spark in case of a float cord being shorted. The intrinsically safe circuits are accomplished by using either barriers or relays. Operation of the control circuits is the same.