Howard HI-104 Single-Phase Pad Transformer - Manual (Page 23)

Document 2.4.96, Revision 0
March, 2013
23
Single-Phase Pad-Mounted Compartmental-Type Distribution Transformers
An optional trip indicator is available, consisting of
an indicator lens which appears orange when the
interrupter is in the TRIPPED position.
Some Magnex Interrupters are supplied with an
optional emergency overload setting. The emergency
overload will allow approximately 30% overload be-
fore tripping. Using a live-line tool (hot stick), operate
the emergency overload as follows.
− To enable emergency overload, rotate
the handle upward in a counterclockwise
direction, until the handle is in the OPEN
position. Next, turn the emergency over-
load lever counterclockwise to the EO po-
sition. Then rotate the handle downward
in a clockwise direction, until the handle
is in the CLOSED position.
− To disable emergency overload, rotate
the handle upward in a counterclockwise
direction, until the handle is in the OPEN
position. Next, turn the emergency over-
load lever clockwise to the NORMAL posi-
tion. Then rotate the handle downward in
a clockwise direction, until the handle is
in the CLOSED position.
The Magnex Interrupter does not provide a visible
disconnect and should not be relied on as the sole
indication that the transformer secondary terminals
are de-energized.
▲
! WARNING
FAILURE TO FOLLOW THE INSTRUCTIONS
BELOW COULD RESULT IN DEATH OR SERIOUS
PERSONAL INJURY, AND COULD ALSO RESULT
IN DAMAGE TO THE EQUIPMENT.
• Do not rely solely on the Magnex interrupter
to de-energize the transformer secondary. Al-
ways ground the secondary terminals before
performing work.
• Operate the Magnex Interrupter with a live-
line tool (hot stick or shotgun stick). Never
operate by hand.
• Do not operate the Magnex Interrupter if
there is evidence of tank distress or leaking.
• The handle must be rotated fully against the
stop in the CLOSED position.
Other Switching and Fusing Devices
Transformers may be provided with switching and
fusing devices not discussed in these instructions. In
such cases contact the Howard Industries Transform-
er Division or the device manufacturer for instruc-
tions.