5
CURRENT TECHNOLOGY
®
PX3
TM
INSTALLATION, OPERATION AND MAINTENANCE MANUAL
W A R N I N G !
Discontinue installation if (1) your conditions are inconsistent with
the checklist above or (2) your conditions cannot be verified. Call
Thomas & Betts Power Solutions’ Technical Support at 800.238.5000
if you have any questions.
The PX3 is a Type 1 SPD which is suitable for use in both Type 1 and Type 2
SPD applications . The PX3 is a one-port SPD and is to be connected in parallel
with the electrical system . It may be connected via a circuit breaker, molded
case switch, fused switch, or connected directly to the bus of the panelboard
or switchboard it is protecting . If direct bus connection is used, Current
Technology, recommends that the PX3 be equipped with the optional integral
disconnect switch .
Check to ensure that a proper neutral-ground bond is installed between the
neutral and ground terminals at the transformer upstream from all 3-Phase
WYE, 3-Phase High-Leg DELTA, or 1-Phase SPLIT-PHASE PX3 devices (see
NEC article 250 .) Lack of a proper bond will damage the PX3 and void the
warranty .
Confirm that the environmental conditions are consistent with the
following ranges:
• Ambient Temperatures: The PX3 must be installed in an area with a
temperature between -13° and +140°F (-25° and +60°C) .
• Humidity: The PX3 must be installed in an area with relative humidity
between 5% and 95% non-condensing .
• Altitude: The PX3 must be installed in a location where the altitude is
below 13,000 feet .
tnbpowersolutions.com/current_technology
This device features an internal protection that will disconnect the
surge protective component at the end of its useful life but will
maintain power to the load now unprotected. If this situation is
undesirable for the application, follow the manufacturer’s instructions
for replacing the device.
Pre-Installation Checklist
✓
continued
Installation Methods
(for the design engineer
and the installer)
