HGL Manual
4.0 Installation Guidelines
10
Power Wiring
When selecting a mounting location for the HGL filter, plan for the routing of the power wiring. Route
the conduit and wiring from the power source to the filter and then to the VFD. The HGL is provided
with internal fuses.
Cable Entry Locations
The enclosed HGL filters are not provided with enclosure wiring knockouts. A location can be
selected at the time of installation. Typical or recommended cable entry locations are shown in
the drawings section of this manual.
Field Wiring Connection Terminals
Compression type terminals are provided for all field wiring connections. The wire size capacity
range and tightening torque for all field wiring connections are listed in the drawings and other
information shipped with the unit.
Grounding
The HGL panel equipment-grounding lug must be connected to the ground of the wiring system.
The equipment-grounding connection must conform to the requirements of the National Electrical
Code (NEC) and/or any other codes that apply to the installation site. The ground connection
must be made using a wire conductor. Metallic conduit is not a suitable grounding conductor. The
integrity of all ground connections should be periodically checked.
Caution
Use copper wire that is appropriate for the voltage and current rating of the
equipment. The wire selection must conform to the requirements of the
National Electrical Code (NEC) and/or other applicable electrical codes.
For units rated less than 100 amps, use wire with an insulation temperature
rating of 60°C or higher.
For units rated 100 amps or more, use wire with an insulation temperature
rating of 75°C or higher.
Connect three-phase power of the appropriate voltage and current capacity to the circuit protective
device to the HGL input power terminals.
Note:
In large units, the input power conductors are connected directly to the input terminals on
the line reactors.
Connect the output terminals of the HGL to the input power terminals of the VFD.
Note:
In large units, the output power conductors are connected directly to the output terminals on
the line reactors. Refer to the VFD installation instructions for additional information.
HGL Filter Operation
Caution
Thoroughly check the installation before applying power and operating the
equipment for the first time.
Before Applying Power for the First Time
Inspect the installation to make sure that all equipment has been completely and correctly installed
in accordance with the
Installation Guidelines
section of this manual.
•
Check to see that the cooling fan(s) are operating in units so equipped.
•
Check to make sure power connections are torqued to recommended torque value.