ACI 117364, Inverter Safety Bypass Switch, 40HP @ 575VAC, NEMA 12 Metal Enclosure

Inverters (Variable Frequency Drives or VFD’s) provide an economical means of regulating the speed and performance of motors. Inverters have gained a prominent place in today’s industrial and commercial arena. But as dependable as modern inverters are, they still malfunction and cease operation, generally at the worst possible moment. For this reason, several methods of isolating the inverter have been developed. Until now these methods involved expensive and unreliable contactors, relays, and timers. Advance Controls' Patented IBYSS ® (Inverter Bypass Safety Switch) eliminates all of these unreliable methods of removing the power from the inverter drive.

The IBYSS ® is a manually operated "Positive Break" switch. It does not rely on relays, contactors, or timers; all of which can burn out and stop the application from running. The "Positive Break" feature mechanically ramps the contacts open. The IBYSS ® does not use springs (as used in contactors and relays) to open the contacts.

Should the inverter malfunction, the IBYSS ® is manually switched from the “DRIVE” to the “LINE” position. This redirects power around the inverter straight to the motor and completely removes all power from the inverter. This provides total isolation of the inverter from both the incoming power line and the outgoing line to the motor. Since the power to the inverter is completely cut off, the inverter can be serviced or even removed, while the application is operating at full speed / full power. The IBYSS ® is the answer for a low cost, direct acting, straight forward and reliable means of providing an inverter bypass and total isolation of the inverter during a malfunction while still providing full power directly to the application.

The IBYSS ® is also furnished with a "TEST" position. This "TEST" position allows power into the inverter for setup and diagnostics, but does not allow power to the application. The "TEST" position simplifies the installation and maintenance of the inverter.

The IBYSS ® can be customized for specific applications. Enclosures, switching patterns, connections, etc. can be customized to meet unique needs.

4 position IBYSS ® (LINE / OFF / DRIVE / TEST)
Direct Control
Full speed / full power in the "LINE" position
Manual operation with positive break IBYSS ® contacts
No contactors, relays or coils to consume power or burn out
Panel mount disconnect style handle assembly meets OSHA 1910
Terminal strip included for easy field wiring
Factory assembled in an enclosure for easy field installation
Complete isolation of the Inverter in the "LINE" position
Gold flash auxiliary contacts for reliable control signals
Components UL cUL Listed / CE
U.S. Patent #5,721,449