More Info:

- 75 to 1350kW Drives : 2 Second 50% Sag -

The M3460R series of DC Bus Ride-Thru Modules provide protection from line voltage sags for 208-600VAC variable frequency drives that use a fixed rectifier and DC bus.

Many drives claim to have ride through capability such as auto restart or kinetic buffering, but most are not able to maintain complete control over the motor as called upon by the process during undervoltage power disturbances. Many Drives are now “SEMI-47 compliant”, but SEMI-47 specification does NOT include maintaining motor speed!

The majority of AC line voltage fluctuations that occur in three-phase distribution systems have a magnitude (decrease from nominal voltage) of less than 50% and duration of less than 0.5 seconds. The M3460R provides sufficient ride through capability to handle these types of voltage sags by temporarily storing energy in inductors and releasing it back into the drive's DC bus when needed. This allows the drive to “ride through” these events while, MAINTAINING MOTOR SPEED and TORQUE, without experiencing drive shutdown.

The M3460R single backplate systems are available up to 600VAC and 250kW / 335hp, and can be ordered open chassis or enclosed cabinets with disconnects. Multiple master / slave systems are available up to 1350kw / 1800hp.

Adding M3460R to any fixed bus drive allows the drive system to surpass SEMI-47 specifications.