DPI TESTER AND BYPASS UNIT (DPI TAB)

The Voltage Dip Proofing Inverter (DPI) has become an industry standard for the elimination of process down time caused by momentary voltage sags and interruptions. Power Quality events exist in all distribution systems and the DPI has been successful in overcoming the problem in a wide range of industries. In many cases the DPI is used in plant where preventative maintenance programmes are in place. As part of these programs it has become necessary to test the DPI to ensure that it is fully functional. This is a time consuming task even if bypass switches were installed together with the DPI. Qualified personnel are needed to perform the tests on the DPI using sophisticated test equipment. The time required to test a DPI ranges from 30 to 45 minutes depending on the location of the DPI and conditions at the plant.

The DPI Tester and Bypass (DPI TAB) has been developed to enable easy integration of the DPI into preventative maintenance schedules and eliminate the need for highly skilled personnel to perform the tests.

The DPI TAB displays the following information:

• DPI Model.
• Supply voltage.
• Events serviced since last test.
• Total number of events serviced.
• Total number of days in service.
• Days since last test.
• Test results.
• DPI inverter output voltage.
• DPI run time setting.
• Storage Capacitor condition.