TCI HG7 - Manual (Page 11)

I N T R O D U C T I O N
INTRODUCTION HG7 I, O, & M Manual 9
Maintenance and Service
HG7 Harmonic Filter Reliability and Service Life
The HG7 has been designed to provide a service life that equals or exceeds the life of the variable
speed drive. It has been thoroughly tested at the factory to assure that it will perform reliably from the
time it is put into service. The following periodic maintenance is recommended to assure that the HG7
filter will always perform reliably and provide the expected service life.
Periodic Maintenance
Warning Only qualified electricians should carry out all electrical installation and
maintenance work on the HG7 filter.
Disconnect all sources of power to the drive and HG7 before working on the
equipment. Do not attempt any work on a powered HG7.
Check to see that the installation environment remains free from exposure to excessive dirt and
contaminants. Refer to the Pre-installation Planning section of this manual.
Check to make sure that the enclosure ventilation openings are clean and unobstructed.
Clean the air filter in units that have filtered air inlets. Clean as often as necessary to prevent dirt build-
up from impeding air flow.
Check the operation of the cooling fan.
Inspect the interior of the enclosure for signs of overheated components. Clean the interior of the
enclosure whenever excess dirt has accumulated.
Check the integrity of all power and ground wiring connections.
All electrical connections must be re-torqued annually.
Troubleshooting
Warning Only qualified electricians should carry out all electrical installation and
maintenance work on the HG7 harmonic filter.
Disconnect all sources of power to the drive and HG7 before working on the
equipment. Do not attempt any work on a powered HG7 harmonic filter.
The harmonic filter contains high voltages and capacitors. Wait at least five
minutes after disconnecting power from the filter before you attempt to
service the harmonic filter. Check for zero voltage between all terminals on
the capacitors. Also, check for zero voltage between all phases of the line side
of the fuses, Fu1(a)–Fu2(a)–Fu3(a), and all input terminals L1, L2 and L3 of
the line reactor (KDR). All setup, maintenance, and troubleshooting must be
done by a qualified electrician. Failure to follow standard safety procedures
may result in death or serious injury.
Note: when disconnecting wires from components and terminations, mark the wires to correspond to
their component and terminal connection.
Reference Drawings
When troubleshooting, refer to the drawings provided for the specific equipment. Typical drawings are
provided in this manual.