Current Technology PX3 User manual

PX3
SURGE
PROTECTION
Panel Extension
TM
Electronic Grade
Panelboard Extension
Featuring the Failure-Free ISMTM
Installation, Operation
and Maintenance Manual
PN 750-0062-003 B00

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Table of Contents Guide to Installation and Assistance ........................... 3
Pre-Installation Checklist ................................... 4
Installation Methods ....................................... 5
Service Configurations ..................................... 6
Plan Your Installation ...................................... 8
Remove the Cover ........................................ 9
Attaching PX3 to Panelboard ................................ 9
Punch Conduit Openings .................................. 10
Mount the Panelboard and PX3 Assembly ...................... 10
Electrical Connections .................................... 10
Conductor Routing ....................................... 11
Conductor Sizing and Overcurrent Protection .................... 12
Indoor Installations....................................... 13
Neutral to Ground Filter Jumper ............................. 13
Before Applying Power Checklist............................. 14
Verify Proper Operation ................................... 15
Connecting Form “C” Dry Contacts ........................... 16
Troubleshooting ......................................... 17
Installation Assistance .................................... 17
Operation/Maintenance ................................... 18
Options ............................................... 18
Stand-Alone Options ..................................... 18
Standards and Listings.................................... 18
Appendix.............................................. 19
15-Year Limited Warranty.................................. 20
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The PX3TM offers an externally mounted surge solution that can be physically attached to the top or bottom of any
panelboard, providing a reduced profile surge solution. PX3TM surge suppression system features a powerful failure-free
ISMTM (Integrated Suppression Module). The ISMTM contains individual thermally fused and protected MOVs, surge-rated
copper busing, robust filtering and advanced remote communications capabilities.
Compatibility: The PX3 Panelboard Extension is compatible with General Electric, Square D, Emerson/Liebert,
Siemens, and Eaton Cutler-Hammer/Westinghouse lighting panelboards.

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Thank you for choosing the Current Technology®PX3 Surge Suppression
System. We look forward to fulfilling your facility-wide surge suppression
filter system needs.
Should you have questions about installing the PX3 please call
Current Technology®Technical Support at 800.238.5000 or
804.236.3300. Support is available Monday through Friday,
8:00 a.m. to 5:00 p.m. EST. You can also email us at
[email protected]
This manual provides guidelines for the proper installation of the PX3 family
of devices. Proper product selection and compliance with these guidelines will
help your new suppression system provide years of reliable service. If installers
are unsure about the facility’s electrical configuration or have other installation-
related questions, it is recommended they consult a master electrician or other
qualified electrical professional.
When shortcuts are taken or installation procedures are not followed, the PX3
system may be damaged or may not provide adequate protection. Improper
installation may also void the warranty. It is extremely important to follow these
installation procedures carefully.
Guide to Installation and
Assistance
W A R N I N G !
HAZARDOUS VOLTAGES PRESENT: Improper installation or
misapplication may result in serious personal injury and/or damage
to electrical system. Read the complete installation instructions
before proceeding with installation. Remove all power to the
electrical panel before installing or servicing the surge protective
device (SPD).
W A R N I N G !
IMPORTANT SAFETY INSTRUCTIONS: All work must be performed
by licensed and qualified personnel. The electrical system must be
properly grounded in accordance with the U.S. National Electrical
Code, state and local codes or other applicable codes for this SPD to
function properly. This device is suitable for installation where the
available short circuit current is 200,000 rms symmetrical amperes at
600VAC or less.

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
E.g.: PX3-050-208-3Y-MFT-M6E-F2D
PX3 — 050 — 208 — 3Y — MFT — M6E — F 2 D
Model
kA Rating
Voltage
Configuration
Monitoring
Filter Option
Optional Feature
Integral Disconnect
Enclosure
kA Rating
Available PX3TM kA Ratings:
050, 080, 100, 125*, 150*, 200*
Voltage**
208 120/208
240 120/240
380 220/380
480 277/480
600 347/600*
Configuration**
1G 1-Phase, Grounded
2G 2-Phase, Grounded, Split-Phase
3Y 3-Phase, Grounded, Wye
3R 3-Phase, Grounded,
High-Resistance
3H 3-Phase, Grounded,
High-Leg Delta
3D 3-Phase, Grounded, Delta
Enclosure
MFT Metal, Flush Mount, Top Feed
MFB Metal, Flush Mount, Bottom Feed
MST Metal, Surface Mount, Top Feed
MSB Metal, Surface Mount,
Bottom Feed
SFT Stainless, Flush Mount, Top Feed
SFB Stainless, Flush Mount,
Bottom Feed
SST Stainless, Surface Mount,
Top Feed
SSB Stainless, Surface Mount,
Bottom Feed
Monitoring
M0 No local monitoring (see remote
MxX stand-alone option)
M1 LED/Phase + Audible Alarm, Dry
Relay Contacts
M2 M1 + Surge Counter
M3 Advanced Monitoring, Character
Display, Modbus RTU
M4E M3 + Ethernet, Modbus TCP
M5 Advanced Monitoring, Graphics
Display, Modbus RTU
M6E M5 + Ethernet, Modbus TCP
Filter
F Filter
N No Filter
Optional Features
1 Panel Mounted In-House
2 Test Port
3 Type 2 SPD (UL 1283)
4 Full Flush Cover
5 GE Version
6 Square D Version
7 Siemens, Eaton Cutler-Hammer
Disconnect Option
D Integral Disconnect
Blank No Disconnect
Stand-Alone Options
(To Be Ordered As Separate Items)
DTS DTS-2 Diagnostic Test Set
MxX Remote Monitor Extension M1X
through M6EX
HPI HPI Cable
Table 1: Sample Model Number Scheme (PX3)
An area on the back cover of this manual is allocated to log your PX3
model number, purchase date, installation date, and installer
*Not available with Integral Disconnect.
**Consult factory for additional Voltage/Configuration options.
Before Beginning
Confirm that the voltage(s) and service configuration shown on the PX3 product
label are consistent with the voltage and service configuration of the system to
which it is being attached. A model number is printed on the label affixed to the
inside of the PX3 cabinet. Each model number corresponds to the voltage and
service configurations as per sample model number scheme in Table 1:
Pre-Installation Checklist ✓
W A R N I N G ! FOR UNITS WITH DTS-2 TESTER: When unit is
equipped with an Amphenol test port. Power to the Equipment Under
Test (EUT) must be OFF prior to testing. Turn EUT’s disconnect switch
or upstream circuit breaker to “OFF” position.
W A R N I N G ! THE PX3 WARRANTY IS VOIDED if the unit is
damaged as a result of improper installation or the installer’s failure
to verify the following conditions prior to installation.
W A R N I N G ! Do not HIPOT the PX3 unit or the electrical system
to which the PX3 unit is connected without disconnecting the PX3
conductors including phases, neutral and ground.

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CURRENT TECHNOLOGY®PX3TM 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.
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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)

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Figures 1-4 show the electrical relationship between the PX3 and these four
basic service configurations: WYE, DELTA, High-Leg DELTA and SPLIT-PHASE.
Service Configurations
NBAC
B
AC
PX3 PANELBOARD
NG
NABC G
B
N
CA
N
G
Xo BOND
EARTH
GROUND
C
B
A
N
G
PX3 PANELBOARD
G
ABCG
G
EARTH
GROUND
CA
B
C
B
A
G
NBAC
B
AC
PX3 PANELBOARD
NG
NABC G
B
N
CA
N
G
Xo BOND
EARTH
GROUND
C
B
A
N
G
PX3 PANELBOARD
G
ABCG
G
EARTH
GROUND
CA
B
C
B
A
G
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Figure 2
3-Phase, 3-Wire Delta
Figure 1
3-Phase, 4-Wire Wye

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
NBAC
PX3 PANELBOARD
NG
NAB*CG
NA C
PX3 PANELBOARD
NG
NL1L2G
*NOTE: HIGH-LEG MUST BE B PHASE
N
G
XoBOND
EARTH
GROUND
N
G
CA
N
B*
C
B
A
N
L2 L1
L2
L1
N
G
Xo BOND
EARTH
GROUND
N
G
NBAC
PX3 PANELBOARD
NG
NAB*CG
NA C
PX3 PANELBOARD
NG
NL1L2G
*NOTE: HIGH-LEG MUST BE B PHASE
N
G
XoBOND
EARTH
GROUND
N
G
CA
N
B*
C
B
A
N
L2 L1
L2
L1
N
G
Xo BOND
EARTH
GROUND
N
G
Figure 3
3-Phase, 4-Wire High-Leg Delta
Figure 4
1-Phase, 3-Wire Split-Phase

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Before you begin assembly, check that the supplied trim kit is
appropriate for your particular installation. If you do not have the
correct trim hardware contact your supplier.
There are multiple installation options for the mechanical installation of the PX3.
Flush Mount Options
•Flush Mounted, Top Feed, Connected to the Panelboard – The PX3
trim plate is offset to fit underneath the panelboard’s trim plate when the
PX3 is mounted on the bottom of the panelboard.
•Flush Mounted, Bottom Feed, Connected to the Panelboard – The PX3
trim plate is offset to fit above the panelboards trim plate when the
PX3 is mounted on the top of the panelboard.
•Flush Mounted, Stand Alone – The PX3 trim plate does not mate with the
panelboard’s trim plate. (Choose "full flush cover" in options section)
Surface Mount Options
•Surface Mounted, Top Feed, Connected to the Panelboard – The PX3
trim plate butts up next to the trim plate of the panelboard.
•Surface Mounted, Bottom Feed, Connected to the Panelboard – The PX3
trim plate butts up next to the trim plate of the panelboard.
•Surface Mounted, Stand Alone – The PX3 trim plate does not mate
with the panelboard’s trim plate.
Plan Your Installation ✓
STAND ALONE MOUNTTOP FEED BOTTOM FEED
TOP FEED BOTTOM FEED STAND ALONE MOUNT
SURFACE MOUNT
FLUSH MOUNT
PANELBOARD
PANELBOARD
PANELBOARD
PANELBOARD
PANELBOARD
PX3
PX3
PX3
PX3
PX3
PX3
ENCLOSURE
TRIM
TRIM
ENCLOSURE
TRIM
ENCLOSURE
ENCLOSURE
ENCLOSURE
ENCLOSURE
3/4" TYP.
PANELBOARD
STAND ALONE MOUNTTOP FEED BOTTOM FEED
TOP FEED BOTTOM FEED STAND ALONE MOUNT
SURFACE MOUNT
FLUSH MOUNT
PANELBOARD
PANELBOARD
PANELBOARD
PANELBOARD
PANELBOARD
PX3
PX3
PX3
PX3
PX3
PX3
ENCLOSURE
TRIM
TRIM
ENCLOSURE
TRIM
ENCLOSURE
ENCLOSURE
ENCLOSURE
ENCLOSURE
3/4" TYP.
PANELBOARD
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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Remove the Cover
Attaching the PX3
to the Panelboard
Open the cover of the PX3 and carefully disconnect all cables from the circuit
boards mounted on the door.
Remove the door from the enclosure by removing the screws. Set the door
aside.
Current Technology®recommends attaching the PX3 enclosure to the top or
bottom of the panelboard’s enclosure so that the two enclosures are joined
without a barrier. It is best to do this before the panelboard is mounted to the
structure.
To join the two enclosures, the top or bottom endplate of the PX3 may
be removed. Similarly, the top or bottom endplate of most commercial
panelboards may be removed.
If your panelboard is TOP-FEED, remove the bottom endplate of the
panelboard and the top endplate of the PX3.
™
If your panelboard is BOTTOM-FEED, remove the top endplate of the
panelboard and the bottom endplate of the PX3.
™
Attach the PX3 to the panelboard using the supplied collar hardware and
screws. Refer to the illustration above showing an PX3 being mounted to the
bottom of a panelboard.
Tip: Use of small C-clamps helps hold the parts in place while the screws
are inserted and tightened.
Note: The panelboard and PX3 enclosures can also be joined together using a
close nipple, lockwashers and bushings. Such installations, however, may limit
the ability to pass conductors between the two enclosures.

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
If desired, punch holes for branch circuit conduits at this time or wait until the
PX3 and panelboard are mounted to the structure.
Mount the joined panelboard and PX3 to the building structure using
construction methods and hardware appropriate for your site. Be sure to
fasten both the PX3 enclosure and the panelboard enclosure to the building
structure.
If you choose to mount the PX3 as a stand-alone enclosure, locate the
PX3 enclosure according to the guidelines in the following section
“Electrical Connections”.
Phases, Neutral* and Ground: Connect the phase, neutral and ground
conductors. Connect the phase conductors to the lugs labeled “A,” “B,” and
“C” on the ISM and the ground and neutral* conductors to the lugs labeled
“G” and “N.” The terminal lugs of the ISM in the PX3 must be electrically
connected by the installer to the appropriate terminals in the panelboard.
Before making connections, read and remove the WARNING tag from the
ground lug marked “G” on the ISM.
Overcurrent Protection: Connect the phase conductors to circuit breakers in
the panelboard. Current Technology®recommends using circuit breakers in the
range of 60 to 100 amps.
Note: If applicable, please consult specifying engineer’s recommendation prior
to making connections.
* Delta-configured PX3 models do not have a Neutral Lug.
Punch Conduit Openings
Mount the Panelboard
and PX3 Assembly
Electrical Connections
Conduit Openings
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14”
H
(H = 9” for PX3
50-100 & 14” for
PX3 125-200)
■ALLOWABLE AREA FOR CONDUIT ENTRY
Figure 5
Standard
PX3 Without
Disconnect
Figure 6
PX3 With
Disconnect