TCI HG7 - Manual (Page 15)

I N T R O D U C T I O N
INTRODUCTION HG7 I, O, & M Manual 13
Product Description
HG7 Drive-Applied Harmonic Filter
The HG7 is a drive-applied harmonic filter designed and developed by TCI to reduce the harmonic
currents drawn from the power source by variable speed drives. The HG7 is available for 240, 480, 600
(60 Hz) and 380 – 415 (50 Hz) volt systems. It is suitable for use with 3-phase diode bridge rectifier
loads such as PWM AC drives.
The HG7 is a passive filter connected in series with the input terminals of a variable speed drive or
several drives that operate as a group. It is designed to provide a low impedance path for the major
harmonic currents demanded by the drive. The filter is a stand-alone device that can be furnished in its
own enclosure and mounted adjacent to the drive. It is also available on an open panel for mounting
within an enclosure with the drive or other equipment.
The HG7 filters consist minimally of the following features and components:
♦ A KDR input series reactor to prevent system interaction and improve filter performance.
♦ An L-C harmonic filter circuit with:
A TCI 3-phase tuning reactor specifically designed for the HG7 filter
High-endurance, harmonic-rated capacitors
♦ Bleeder resistors to ensure safe capacitor discharge upon filter shutdown.
♦ Cooling fans (on select models) to ensure adequate cooling and safe operating
temperatures.
♦ Compression terminals for ease and integrity of all power and control wiring.
♦ Fuses.
Nameplate Data
Figure 1 shows a typical HG7 harmonic filter nameplate. The following information is marked on the
nameplate:
♦ Part number: encoding is explained on the following page
♦ FLA: the rated continuous operating current (RMS amps)
♦ System Voltage: the rated 3-phase line voltage (RMS volts)
♦ Hz: the rated frequency (60 Hz/50 Hz)
♦ Phase: 3 – The HG7 filter is designed for use only with 3-phase power.
♦ Drawing #: outline and mounting dimension drawing number
♦ Schematic #: schematic diagram drawing number
♦ Manufacturing #: for TCI internal use
♦ Enclosure Type: UL designation or "Open" panel construction
Figure 1 – Typical HG7 Harmonic Filter Nameplate