Frequently Asked Questions

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Question Answer
Q: Are communication and control features available with the HGA?
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A: Yes, communication options include Modbus RTU over RS485 and EtherNet/IP, others are available upon request. The HGA includes a 65k color HMI Operator Interface which allows users to quickly and easily set-up, monitor performance and remotely control the active filter for superior control and performance.
Q: Can HGA settings be changed to fix displacement power factor before reducing harmonics?
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A: The HGA filter’s programming can be changed to accommodate the adjustment in primary functions; however, this would become a custom filter.
Q: Can the HGA be applied on systems containing DC drives?
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A: Yes, the HGA can correct harmonics from a DC drive.  The harmonic spectrum looks different from a traditional 6-pulse VFD, however the HGA can correct for the harsher harmonic signature.  More corrective current is required for a DC drive application so please consult your TCI representative and size the filter one size larger to handle the DC drive application.
Q: Is startup factory commissioning required for the HGA?
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A: Factory commissioning is not required. However, customers need to follow the HGA Quick Start Procedure from the Installation, Operation and Maintenance manual to check electrical connections and operation of the active filter.
Q: Will the HGA correct displacement power factor?
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A: The HGA will keep the current in phase with the line voltage, however, if it reaches full capacity, the distortion power factor will increase and the total power factor (KW/KVA) will decrease from unity. If additions to the system cause the HGA to reach full capacity, additional HGA units can be installed to correct the situation.