GE Industrial Solutions Tranquell Series - Manual (Page 4)

Installation Instructions
Pro-Stock Panelboards with TRANQUELL  Medium Exposure TVSS
2020000903 (10/04) Page 4 of 9
and twisting the phase, neutral and
ground conductors together will further
enhance the level of protection. The
minimum required installation wire size
for the TRANQUELL TVSS is 6-awg.
Direct bus connections are to be made
with the appropriate hardware and
torqued to 110 inch-pounds.
Peak Impulse Rating
Peak surge current capability is an
important characteristic for a TVSS.
The rating per mode should equal or
exceed the maximum surge expected in
service.
5. No protector can survive a direct
lightning strike. A strike close to any
protector, which subjects the device to
surge current or energy duty in excess
of its capability, can also fail the
protector. Supply voltages in excess of
the Maximum Continuous Operating
Voltage capability, or temporary over
voltages which exceed the magnitude or
duration of the protector
’
s Temporary
Over Voltage characteristics, can fail the
unit.
6. Should an abnormal condition occur that
causes premature failure of the
Tranquell TVSS, the suppression
circuitry will short allowing the integral
TVSS fusing to interrupt current flow to
the TVSS without disrupting power to
the protected equipment.
IN THE EVENT OF A BLOWN FUSE,
DO NOT ATTEMPT TO REPLACE THE
FUSE. THE PRO-STOCK SERIES
TVSS CONTAINS NO USER
SERVICABLE PARTS. THE ENTIRE
UNIT MUST BE REPLACED.
7. Increased rate of rise and higher surge
current magnitudes both result in some
increase
in discharge voltage.
Conditions can occur where the
withstand capability of the protected
equipment is exceeded even though the
surge protector is doing its job and
clamping the surge. In these cases
additional low voltage protection may be
required, located as close as possible to
the sensitive equipment
.
8. TRANQUELL Series wye-connected
TVSS units have both normal mode
(line-to-neutral and line-to-ground) and
common mode (neutral-to-ground)
protection. Protection between neutral
and ground is provided on units
designed
for wye-connected
applications. On grounded neutral
systems, common mode protection is
needed if the neutral-to-ground bond is
made more than 10 feet from the surge
protector. This will minimize neutral-to-
ground potential during a transient,
avoiding high transient voltages, which
could reduce protection and cause
possible damage to the system or to the
equipment. Common mode protection
may also be used when the neutral-to-
ground
bond is within 10 feet.
TRANQUELL Series delta-connected
units have normal mode (line-to-
ground) protection.
9. Should an abnormal condition occur that
causes
premature failure of the
Tranquell TVSS, the suppression
circuitry will short allowing the integral
TVSS fusing to interrupt current flow to
the TVSS without disrupting power to
the protected equipment.