SCCR and a new VFD UL Standard — what you need to know
This seminar instructs different types of overcurrent protective devices (OCPD), their behavior in circuit protection, and differences. It instructs requirements for motor branch circuit protection according to different codes/standards for control panels and VFDs. It also provides practical understanding of SCCR and OCPD sizing to obtain a desired SCCR in compliance with UL/NEC/IEC. As a bonus, a new UL standard UL61800-5-1 for VFDs will be discussed along with its impact to industry and benefits to users.