Switchgear equipment ensures electrical power is transmitted and distributed safely and efficiently. Electrical power has to be monitored and controlled to maintain a safe environment. By using disconnect switches, fuses, and breakers, the circuit can be de-energized so work can be performed safely on the line, as well as clear any faults that may have occurred. These components are managed by control panels that provide real-time information on, and control and status of the system. However these control panels as well as breakers and relays, all require power to operate. In the event of a fault or service disruption, power may be lost to these components, creating an unsafe environment. The addition of a DC Uninterruptible Power System is critical to continuity of operation of the switchgear infrastructure by maintaining power to critical components when there is a loss of utility power.
That is why SEI developed a range of uninterruptible power units to maintain auxiliary power to these switchgear components. These units provide a range of backup power from 15 minutes to eight hours.
As an example, Schweitzer Engineering Labs, a supplier of switchgear infrastructure discontinued their UPS, so we developed a replacement that meets or exceeds all parameters of the original Schweitzer UPS. The new SEI 150/48-SEL replicates the form/fit of the original Schweitzer, with the added benefits of more output power, larger battery capacity, and automatic battery testing. SEI’s full line of DC UPS products can meet the requirement of virtually any switchgear application requiring 24 or 48Vdc. To view the full line of SEI UPSs click here.