TCI HG7 - Manual (Page 23)

C O N T A C T O R & C P T O P T I O N
CONTACTOR & CPT OPTION HG7 I, O, & M Manual 21
Standard Filter (ST)
The Standard Package has the suffix of “ST” in the part number and includes very high quality
harmonic-grade capacitors and line reactors. This filter will meet the majority of application
requirements found today. This cost effective product is available as an open panel version, in a UL
Type 1 enclosure, or in an UL Type 3R enclosure. The open panel is perfect for inclusion in a MCC
section or easy installation into industry standard enclosures. The UL Type 1 enclosed units maintain
the same vertical profile as the open panel design. This design is perfect for applications where floor
space is at a premium. The UL Type 3R enclosure protects the filter from harsh conditions.
Product Description
HG7 Standard Harmonic Filter
The HG7 harmonic filter 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 Standard
harmonic filter is for 200/208, 230/240, 460/480 volt or 575/600 volt systems (60 Hz) or 380 – 415
Volt systems (50 Hz). It is suitable for use with 3-phase diode bridge rectifier loads such as PWM AC
drives.
The HG7 harmonic filter 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 Standard consists of the following standard 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
High-endurance, harmonic-rated capacitors
♦ Bleeder resistors to ensure safe capacitor discharge upon filter shutdown, located on
capacitors.
♦ Cooling fans (on select models) to ensure adequate cooling and safe operating
temperatures.
♦ Control Power transformer on enclosed units requiring auxiliary cooling fans.
♦ Compression terminals for ease and integrity of all power and control wiring.
♦ Fuses