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10 to 13.8kV Medium Voltage Motor
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.
The terminal has a copper shaft that is threaded 9/16-in.-18
UNF2A. Brass nuts are provided on the motor terminals to
retain the lugs, and the final connection should be
tightened to 22 to 25 ft·lb (29.8 to 33.9 N·m) using a 7/8-in.
(22.225-mm) socket on a torque wrench.
66
NOTICE
Motor Terminal Damage!
Applying torque to the motor terminal when
tightening lugs could result in equipment or property-
only damage.
Always use a second wrench to back-up the assembly
and prevent the application of torque to the terminal
shaft.
Before beginning wiring and torquing, ensure proper motor
terminal care and do NOT apply any excess stress.
Ground Wire Terminal Lug
A ground wire lug is provided in the motor terminal box to
allow the field connection of an earth ground. The lug will
accept a field-supplied ground wire of #8 to #2 AWG. After
completing the field connection of wiring, inspect and clean
the motor terminals and motor housing, and remove any
debris before reinstalling the motor terminal box cover. The
cover must be re-installed onto the motor terminal box and
all bolts installed. Do NOT operate the chiller with the motor
terminal box cover removed or with any loose or missing
cover bolts.
CVHE-SVX005C-EN
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