20DD077A0EYNA1NNA

The 20DD077A0EYNA1NNA model from Allen-Bradley is an adjustable-frequency AC drive in the PowerFlex 700S series. It has a specified input voltage of 480V AC and operates effectively within a three-phase configuration. It can handle a normal-duty current of up to 77 amps, making it suitable for various heavy-duty motor applications.

Designed to meet NEMA Type 1 standards, the enclosure is rated IP20, providing moderate protection against dust and physical contact. The human-machine interface is a blank cover, facilitating a streamlined aesthetic for specific installations.

For operation, this model executes braking using IGBT technology, ensuring smooth and efficient motor control. Additionally, it includes an adjustable bus undervoltage trip feature that lets users customize thresholds to prevent operational issues related to low-voltage conditions. The device integrates a heat sink thermistor that is continuously monitored by a microprocessor, which aids in protecting against overheating by initiating an over-temperature trip when necessary.

The unit is designed to maintain operational stability during brief interruptions, offering a logic control ride-thru period of 0.25 seconds when the drive is inactive. It also supports power ride-thru functionalities for up to 15 milliseconds under full load conditions.