Cable Connections - HPS TITAN N Serie Installation, Fonctionnement Et Entretien

Cable Connections

DANGER
HAZARD OF ELECTRIC SHOCK, EXPLOSION OR
ARC FLASH
Failure to follow these instructions will result in
death, serious injury or property damage.
Never attempt to change connections or taps
unless the transformer is de-energized and all
windings grounded.
WARNING
Failure to follow lifting procedures can result in
death, serious injury, or property damage.
The connecting cable size is determined from the line
current rating of the transformers primary and secondary
windings and may be selected from the information in appendix
A (page 14). Use wire rated for at least 90°C (194°F) and sized
on the basis of 75°C (167°F) ampacity. Use with AL9CU-AL-CU
lugs. Electrical Connector Lugs, if provided, are to be used with
SIW, Class B or Class C cables or wires only.
For three-phase encapsulated transformers, pre-
punched knockouts are not provided. Use the appropriate
cable connector suitable for the application. Please refer to
Appendix D for cable entry locations. If a transformer must
be relocated to make the necessary cable connections, all
safety requirements and the related lifting procedures must be
followed.
Cable Connection Requirements
Side entry of cables is recommended.
For standard non-ventilated DQT type 4 enclosures,

bottom entry is permitted only in the areas defined in
Appendix D.
Offset connectors can be used to help with cable

connections to terminal pads, to reduce the bending
space for the cables
Cable connection lugs of plated copper may be used
to connect to the transformer terminals. Terminals should be
cleaned and electrical joint compounds are recommended for
use on all electrical connections.
Make certain to insulate any unused wire leads with
marrette connectors and electrical tapes where applicable.
Refer to the transformer nameplate for primary and
secondary voltage connection combinations and primary and/or
secondary tap positions as applicable.
Transformers received from the factory will have tap
jumpers installed on the nominal, or 100%, voltage position.
The taps may still be coated with impregnation material and
insulation.
To change taps, it is necessary to gently remove all
contaminants and insulation from the surface of the top and
bottom of the taps (eye-loop or lugs) by sanding the lugs to the
bare metal.
The surface of the tap lead should be clean and coated
subsequently with electrical compound on all non-plated
contacts between the jumper terminal and the tap. Assemble
jumpers to taps as per Appendix D (Drawing 1 for single
conductor eye-loops and tap lugs or Drawing 2 for double
conductor eye-loop taps).
7
January 2022
TIT3IM /