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Medium Voltage Motor
Note: If the box is removed for installation purposes, the
motor terminals MUST be protected against impact
or stress damage. Field fabrication of a cover or
guard is required.
•
The motor terminal box is large enough to
accommodate the use of stress cones.
•
If conduit is applied, a flexible connection of the conduit
to the box should be made to allow for unit
serviceability and for vibration isolation. The cable
should be supported or protected against abrasion and
wear on any edges or surfaces. Cable or conduit
openings can be cut at any location in the box sides,
top, or bottom for cable entry. Always ensure that NO
debris remains in the box after cutting cable entry
holes.
Motor Supply Wiring
WARNING
Proper Field Wiring and Grounding
Required!
Failure to follow code could result in death or serious
injury.
All field wiring MUST be performed by qualified
personnel. Improperly installed and grounded field
wiring poses FIRE and ELECTROCUTION hazards. To
avoid these hazards, you MUST follow requirements
for field wiring installation and grounding as
described in NEC and your local/state/national
electrical codes.
68
Note: Graphic labels (shown above) are used for CE
application only.
Important:
•
Before servicing, disconnect all power
sources and allow at least 30 minutes for
capacitors to discharge.
•
All electrical enclosures—unit or remote—
are IP2X.
Motor circuit wire sizing by the installer must be made in
accordance with the National Electric Code (NEC) or any
other applicable codes.
Three terminals are provided on the chiller for the
connection of power to the motor from the starter. Power
leads to motors must be in multiples of three, with equal
phase representation in all conduits or wire trays. To limit
the effects of corona or ionization with cables carrying more
than 2000V, Trane requires that the power cable have a
metallic shield, unless the cable is specifically listed or
approved for non-shielded use. If the cable is shielded, the
shielding must be grounded at one end (grounding is
typically done at the starter or supply end).
Care must be taken while routing the incoming cables to
ensure that cable loads or tensions are not applied to the
terminal or premature terminal failure could result.
Motor Terminals
Field-provided, ring-type lugs, with no sharp edges or
corners, must be used by a qualified installer to connect the
power wiring to the motor terminals. Follow all instructions
provided with the field-provided lugs to ensure proper
connections.
Important: The use of stress cones is highly recommended
to reduce and control longitudinal and radial
electrical stresses at the cable ends.
Prior to assembly the terminal stud, nuts, and lug should be
inspected and cleaned to ensure they are not damaged or
contaminated. When attaching starter leads to 2.3 to 6.6 kV
X39003892001A
CDHH-SVX003C-EN
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