TCI HG7 - Manual (Page 25)

P O W E R M O N I T O R P A C K A G E O N L Y
POWER MONITOR OPTION HG7 I, O, & M Manual 23
Power Monitor Package Option (XM)
This model is identified by the suffix “XM” in the part number. The "XM" Option HG7 filters are
similar to the standard series HG7, but they have features and characteristics that are beyond the scope
of the “Standard” series HG7. In the rating and dimension tables we list the sizes of the “XM” option
units only to avoid confusion. This manual is intended to be used as a general guide to the installation,
operation, and maintenance of “XM” Option filters.
Product Description
HG7 “XM” Option 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 “XM” option
harmonic filter is for 200/208, 230/240, 460/480 volt, 575/600 volt systems (60 Hz) and 380 – 415
volt systems (50 Hz). It is suitable for use with 3-phase diode bridge rectifier loads such as PWM AC
drives and 3-phase controlled rectifier (SCR or thyristor) loads such as DC 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 “XM” Option 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.
♦ Filter enable/disable contactor with protection and drive interlock provisions.
♦ The HG2
TM Protection Monitor and Harmonic Power Factor Meter is included as
standard in HG7 “XM” option filters rated over 20kVar to 120 kVar in capacitance. It
includes:
Three-character LCD display
Filter Disabled and Filter Enabled status indicating LEDs
UP, DOWN, and SELECT keys
Fault Alarm Relay with form C contact for customer use
♦ Filter Enabled and Blown Fuse indicating lights are included as standard in filters rated
20 kVar and under, or over 120 kVA in filter capacitance rating.
♦ Cooling fans (on select models) to ensure adequate cooling and safe operating
temperatures.
♦ Control transformer for fan and control voltage power
♦ Compression terminals for ease and integrity of all power and control wiring.