The SEL-849 Motor Management Relay enhances VFD protection and provides redundant backup control for VFD normal operation, malfunction, soft start bypass, maintenance, or replacement. The biggest ...
People in industry are continually finding applications that benefit from variable frequency drives (VFDs), which allow users to adapt or change their process to provide a more efficient outcome, ...
A VFD reports a low-volts fault when the drive's dc link voltage drops below 62% of the nominal level for the high setting (480 Vac) and 50% of nominal for the low setting (400 Vac). The +10% and -15% ...
Driven by the benefits of resistance-grounding including concerns over arc-flash hazards, many plants that use variable frequency drives (VFDs) have installed high-resistance grounding (HRG) on the ...
Abstract: This paper proposes a buffer-aided relay selection that is capable of exploiting both half-duplex and virtual full-duplex (VFD) transmissions in a hybrid manner. In the proposed scheme, we ...
Abstract: Due to high residual self-interference (RSI) problems in full-duplex (FD) systems, virtual full-duplex (VFD) has emerged as a smart and an attractive alternative to design co-operative ...
The EL731 AC/DC Sensitive Earth-Leakage Relay can detect ground currents—even in resistance-grounded electrical systems—all the way do to 0 Hz, making it ideal for protecting variable-frequency drives ...
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