Howard HI-102 Overhead Transformer - Manual (Page 14)

Document 2.4.95, Revision 0
May. 2013
14
Fluid-Filled Overhead Distribution Transformers
The following operating instructions and descriptions
of switching and fusing devices are intended to be
a general guide for operation of Howard Industries
fluid-filled overhead distribution transformers in
normal environments. Although every effort has been
made to ensure accuracy and completeness, these
instructions and descriptions do not address every
conceivable application or circumstance that might
be encountered. Personnel should read and comply
with any safety and instructional labels that accom-
pany an accessory device.
Some of the accessory devices described below are
optional and may not be present in any particular
transformer design. The inclusion of particular acces-
sory devices in any transformer design is governed
by industry standards and by individual customer
specifications.
▲
! WARNING
FAILURE TO FOLLOW THE INSTRUCTIONS
BELOW COULD RESULT IN DEATH OR SERIOUS
PERSONAL INJURY, AND COULD ALSO RESULT
IN DAMAGE TO THE EQUIPMENT.
• Use a live-line tool (hot stick or shotgun stick)
to operate devices designed to be operated
by a live-line tool.
• Before servicing the transformer, always
de-energize the transformer from a remote
location and then proceed to ground all
primary and secondary transformer terminals
following industry-accepted safe grounding
practices. Grounding secondary terminals
protects against situations such as a standby
generator energizing transformer from the
secondary circuit.
• Follow industry-accepted safety practices.
Utilize personal protective equipment (PPE)
when working with this equipment.
• Do not operate fluid-immersed switching
devices when the insulating fluid temperature
is below the following limits:
-20°C (-4°F) for conventional transformer
oil and silicone fluid
0°C (32°F) for R-Temp fluid
-10°C (14°F) for FR3 ™ fluid
Hot-Stick Operable Devices
Some devices such as low-voltage circuit breakers,
tap switches, multiple-voltage switches and automat-
ic pressure relief devices are designed to be oper-
ated with a live-line tool (hot stick or shotgun stick).
Do not attempt to operate by hand any device that is
designed to be operated with a live-line tool. Inspect,
test and operate the live-line tool according to the in-
structions provided by the live-line tool manufacturer.
Taps and Multiple-Voltage Windings
Transformers with low-voltage ratings of 600 Volts or
less can be provided with either high-voltage taps or
SECTION 5: OPERATION OF SWITCHING AND PROTECTIVE DEVICES