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

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Also refer to Figures
1 through 4 for
a schematic of
connections for different
service configurations.
The following factors should be
addressed during the design of an
installation to ensure that there is a
suitable place for the PX3 reserved
next to its point of connection to
the electrical system. The selected
mounting location should ensure short
conductor runs providing a direct route
with a minimum of bends. If bends
are required they should be sweeping
bends. Do not make sharp 90˚ bends for
aesthetic purposes.
These illustration show suggested
conductor routing for a top-feed
panelboard. Routing in bottom-feed
panelboards is similar but reversed.
Note that conductors from the PX3
always connect within the panelboards
to lugs or breakers closest to the PX3.
The lugs on the PX3 ISM may be rotated
to facilitate routing.
Conductor Routing
Figure 9
PX3 Direct Bus
Connected With
Disconnect
WIREWAY
ALLOWANCE
ABGC
N
5.50”
G
N
ROUTING
FROM BREAKERS
USE BREAKERS,
NEUTRAL &
GROUND
NEAREST PX3
UNIT
ABGC N
WIREWAY
ALLOWANCE
G
N
5.50”
ROUTING
FROM BREAKERS
USE BREAKERS,
NEUTRAL &
GROUND
NEAREST PX3
UNIT
ABGC
N
WIREWAY
ALLOWANCE
G
N
5.50”
USE NEUTRAL
& GROUND
NEAREST PX3
UNIT
Figure 7
Standard
PX3 Without
Disconnect
Figure 8
PX3 Using
Breakers
Connected With
Disconnect

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
If the PX3 is mounted detached, the performance of the PX3 will be severely
limited if the conductors are too long, are of too small a wire gauge, have too
many bends, or have sharp bends.
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Conductor Sizing and
Overcurrent Protection
Model Without Disconnect With Disconnect
PX3-050 #6 AWG #6 AWG
PX3-080 #6 AWG #6 AWG
PX3-100 #6 AWG #6 AWG
PX3-125 #2 AWG Product Not Available
PX3-150 #2 AWG Product Not Available
PX3-200 #2 AWG Product Not Available
NOTE: Table 2 conductor sizing recommendations ensure that the effective
clamping voltage of the PX3 at the point of connection is kept to a minimum in
order to maximize protection.
Overcurrent Protection: As a Type 1 SPD the PX3 does not require
upstream overcurrent protection for safe operation, however, the design may
require or the installer may choose to connect the PX3 to a circuit breaker,
molded case switch or fused disconnect.
Table 2: Maximum Recommended Conductor Size
Use conductor lengths less than 10 feet
Conductor Length and Sizing: Conductor length must be kept as short
as possible and avoid sharp bends. Conductor length must never exceed 10
feet in length from phase bus through the PX3 to the neutral bus or ground
bus. If the lead length must exceed 10 feet, Current Technology®recommends
using our HPI low impedance cable for installing the product. The following
conductor sizes for phase, ground and neutral connections are recommended.

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Neutral to Ground Filter
Jumper
Indoor Installations
Removal is accomplished by pulling the green jumper from the connector on
the ISM.Once removed, the jumper should be placed in the clear vinyl pocket
containing the unit test data for future use if desired (Figure 10).
Connector on ISMTM
Neutral to Ground Jumper
Removed from ISMTM
Current Technology®recommends feeding all PX3 models with a disconnect,
circuit breaker, molded case switch or fused disconnect.
If a breaker or molded case switch is used for connecting the phase
conductors, Current Technology®recommends using circuit breakers
in the range of 60 to 100 amps.
W A R N I N G ! Prior to proceeding, ensure the SPD unit does not
have voltage applied to its input terminals.
PX3 models equipped with a filter system (“-F” suffix), and have a neutral
connection, come with a green jumper wire that loops out of the 3-pin
connector on the ISM and connects a filter neutral to ground. In certain
medical applications, or circuits which employ GFCI protection, this Neutral to
Ground filter connection should be removed.
Figure 10
NEMA 1 enclosures are suitable for indoor use only.

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Field Testing: Your PX3 has been carefully tested before leaving the factory.
However, the performance of this unit as a surge suppression device can be
confirmed in the field prior to startup using a portable DTS-2 Tester.
The optional DTS-2 Tester may have been purchased along with your PX3 or
Field Startup Testing Service may have been specified during the purchase of
the PX3.
™Check with the owner or owner’s representative to see if this test is
required at your site.
If you have questions about Field Startup Testing or would like to
arrange for this service, call Current Technology®Technical Support at
800.238.5000.
Confirm Pre-Installation Checklist: Confirm that the “Pre-Installation
Checklist” found in the beginning of this manual was completed correctly
before proceeding.
Confirm Line Voltage: Measure the line to line voltages feeding the
panelboard or disconnect and be sure they are within ±10% of the rated
line voltage of the PX3. Use the following table to determine the range of
acceptable voltages for each model of the PX3. The power system operating
frequency should be between 47–63 Hz.
Table 3: Acceptable Voltage Ranges for All PX3 Models
PX3
MODEL NO.
NOMINAL
L-L VOLTAGE
-10% TO +10%
L-L VOLTAGE
PX3-xxx-240-2G-xxx-xx-xx 240 216 to 264
PX3-xxx-208-3Y-xxx-xx-xx 208 188 to 228
PX3-xxx-380-3Y-xxx-xx-xx 380 342 to 419
PX3-xxx-480-3Y-xxx-xx-xx 480 432 to 528
PX3-xxx-600-3Y-xxx-xx-xx 600* 540 to 660
PX3-xxx-240-3H-xxx-xx-xx 240 216 to 264
PX3-xxx-240-3D-xxx-xx-xx 240 216 to 264
PX3-xxx-480-3D-xxx-xx-xx 480 432 to 528
PX3-xxx-600-3D-xxx-xx-xx 600* 540 to 660
*Not available with Integral Disconnect
Note: first “xxx” specifies rating of 050, 080, 100, 125, 150, 200kA
Before Applying Power
Checklist ✓
W A R N I N G !
Do not apply power if the measured voltage is not within the range
specified for the PX3 model being installed.
➤Apply power to the PX3 by closing the circuit breaker or switch (if any)
feeding the PX3 or closing the PX3 integral disconnect.
W A R N I N G !

15
CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
➤If your PX3 has M1 Standard Monitoring (see Figure 11):
Verify that only the green indicating lights are illuminated and that there are no
red lights illuminated. Green lights indicate a normal condition for each phase.
Orange lights indicate protection of 40–75% and Red lights indicate protection
of <40%. Three-phase units have three (3) green indicating lights labeled “A”,
“B”, and “C”. Split-phase units should only have lights “A” and “C” illuminated.
See table below for LED status indication.
The M1 Standard Monitoring is equipped with a dual set of Form “C” contacts
(see Figure 12). The relay containing the contacts is in the “alarm condition”
or normally closed when the power is off to the unit, when the unit is
encountering loss of power to one or more phases, or the PX3 is encountering
more than 40% loss of capacity due to internal fuse operation. Test the
operation of the Form “C” contacts by de-energizing the PX3 and checking
the state of the contacts with a continuity tester or observing the effect of the
contacts on the user provided remote alarm circuits.
➤If your PX3 has the M2 Option (See Figure 12):
The M2 option is equipped with a surge counter. The number of surges
detected by the counter is displayed on a 6-digit LCD display on the front
of the PX3 door. The surge counter will also increment each time power is
applied to the unit after being in the “off” state. The counter can be reset by
pressing the button on the front of the counter.
The M1 and M2 Standard Monitoring also contain an audible alarm that
should not operate under normal conditions. To silence audible alarm,
press ALARM SILENCE button on display.
➤If your PX3 is equipped with the MasterMind®Advanced Monitoring
Option (see Figure 13)
Please refer to the MasterMind®manual for Specifications and Operation.
Verify Proper Operation
Figure 11: PX3 with M1 Standard
Monitoring.
Figure 12: PX3 with M2 Standard
Monitoring with Surge Counter.
Figure 13: PX3 with MasterMind®
Advanced Monitoring
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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
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Table 4: LED and Display Alarm Status Conditions
DRC1 DRC2
• Rated 250V 2A DC, 250V 5A AC, 14-22 AWG
DRC1 DRC2
• Rated 250V 2A DC, 250V 5A AC, 14-22 AWG
Connecting Form “C”
Dry Contacts
Dry Contacts: All PX3 models have a dual set of Form “C” dry contacts
available for connection to user-provided remote alarm and monitoring circuits.
The installer must provide the appropriate raceway and wiring for this circuit
observing the restrictions on conduit openings illustrated in an earlier section
of this manual. The installer must route the monitoring conductors to the blue
terminal blocks on the door-mounted circuit board. Choose the appropriate
materials and routing to allow the door to open and close without pinching or
stressing wires.
Figure 14 shows the Form “C” contact configuration. The annotations on the
diagram match the markings on the blue terminal block.
Figure 14
Notes:
* 1 Highest priority takes precedence: I.e. if phase is lost, LED is Off, no blinking even if filter loss. Alarm Condition means the Audible Alarm is ON, Dry Relay Contacts is OFF
(de-energized), and System Alarm LED is ON.
2 % Protection levels of 40% and 75% are default settings which can be changed by the user (M3 System only). If the Surge Module or Current Rating settings are changed,
the Protection levels will change automatically.
** 3 Subsequent Status message will be displayed on M3 Character and Graphics Displays, where “x” is corresponding Phase (A, B, C or L1, L2). The Highest Priority condition
will over-write earlier conditions. Messages may be truncated to fit screen area (with T&B acceptance).
4 Red System Status LED will remain on after Status has returned to normal. User must clear the status by pressing the M3 Cancel button.
5 Alarm Conditions will also be logged in the Events Log.
Condition Corresponding Phase LED Alarm
Cond M3 Status Message** Priority *
Phase Loss (<80%) LED Off Y Alarm: Phase x Loss 1A
Phase Low (80 to <90%) LED Short Blink Green (≈25% duty) Y Alarm: Phase x Low 1B
Phase High (>110%) LED Long Blink Green (≈75% duty) Y Alarm: Phase x High 1C
N-G OverVoltage N/A Y Alarm: N-G Voltage High 2
Frequency Out of Range N/A Y Alarm: Frequency
Out of Range
3
% Protection < XX% LED On Red Y Alarm: Protection x Low 4
Filter/Cap Loss LED Blink Red once every 2 seconds Y Alarm: Protection Filter x Loss 5
% Protection XX to YY% LED On Orange N Alarm: Protection x Reduced 6

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CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
Your Current Technology®PX3 surge suppression system does not require
periodic maintenance. The unit contains no serviceable parts. The unit’s
heavy-duty design should preclude the need for any repairs; however, the
following indications and procedures can be checked (See Table 5):
Our staff is available to support you.
Monday through Friday, 8:00 a.m. to 5:00 p.m. (EST):
800.238.5000 or 804.236.3300
Troubleshooting
Installation Assistance
INDICATION PROCEDURE
One or more phase
indicator lights are off
• Check that the external power source
supplying power to unit is energized
• Check that the circuit breaker or switch (if
appropriate) feeding the PX3 is turned “on”
Phase status lights
are orange, indicating
40–75% protection
Phase status lights
are red, indicating
<40% protection
• Check the cables connecting the door-
mounted devices to the suppression module.
Exercise caution as High Voltage is present
on door mounted PCBs
• If all of above are O.K., contact factory
• If breaker is tripped, use a portable Diagnostic Test Set (DTS-2) to verify unit
integrity before resetting the breaker
Portable Diagnostic Test
Set (Current Technology®
Model DTS-2) indications
are not in range* for the
product
Contact factory
*Ranges are located on the underside of DTS-2 lid.
Table 5: Troubleshooting Checklist

18
CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
When properly installed the PX3 Surge Suppression System will provide years
of uninterrupted service.
With several levels of monitoring available, the user should be able to verify the
normal operation of the PX3 and confirm that it is connected correctly to the
power system.
Current Technology®does recommend testing in order to verify that the unit is
able to clamp surges to an acceptable level.
This test should be coordinated with scheduled maintenance events in your
facility. It can be performed in-house with the aid of the DTS-2 Portable Test
Set or requested as a service from a Current Technology®authorized service
representative.
The PX3 Surge Suppression System is available with the following options:
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
DTS DTS-2 Diagnostic Test Set
MxX Remote Monitor Extension M1X through M6EX
HPI HPI Cable
Operation/Maintenance
Options
Stand-Alone Options
tnbpowersolutions.com/current_technology
• UL Listed 1449 4th Edition for Type 1 and Type 2 SPD applications, cUL,
and UL 1283
• Meets Requirements for UL 96A
• Compliant to IEEE C62.41.1-2002, C62.41.2-2002 and C62.45-2002
• NFPA 70 [NEC], Article 285
• RoHS Compliant
Standards and Listings
The following standards and listings apply to the PX3 product line:

19
CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
(W)
(D)
(H)
PX3TM Inches (mm)
H 9.00 (228.6)
W 20.00 (508.0)
D 5.75 (146.0)
(W)
(D)
(H)
Figure 15
PX3TM 050 – 100
Figure 16
PX3TM 125 – 200 and
PX3TM 050 – 100 with Integral
Disconnect
Appendix
Dimensional Specifications
PX3TM Inches (mm)
H 14.00 (355.6)
W 20.00 (508.0)
D 5.75 (146.0)

20
CURRENT TECHNOLOGY®PX3TM INSTALLATION, OPERATION AND MAINTENANCE MANUAL
© 2018, Thomas & Betts Power Solutions, LLC. • Thomas & Betts Power Solutions, LLC., is a wholly owned subsidiary of Thomas & Betts Corporation.
Current Technology®is a registered trademark of Thomas & Betts Corporation • Specifications are subject to change without notice. • Visit our website for latest revisions.
Thomas & Betts Power Solutions
5900 Eastport Blvd. • Richmond, VA 23231-4453 USA
Tel: [phone] • Toll free: [phone] • Fax: [phone]
tnbpowersolutions.com/current_technology
PN 750-0062-003 B00 081418
Model #
Date of Purchase
Date Installed
Installer
Thomas & Betts Power Solutions, LLC / Current Technology®warrants that
PX3 suppression filter systems (the “Product”), shall meet applicable industry
standards and specifications and be free from defects in materials and/or
workmanship. Should any failure of the Product to conform to this warranty
appear within fifteen (15) years from the date of the purchase of the Product,
Thomas & Betts Power Solutions shall either repair or replace the defective
Product, or part thereof, upon return to Thomas & Betts Power Solutions’
manufacturing facility in Richmond, Virginia with transportation charges prepaid.
Thomas & Betts Power Solutions shall have no liability under this warranty for
any problems or defects directly or indirectly caused by misuse of the Product,
alteration of the Product (including removal of any warning labels), accident,
neglect or improper installation, application, operation, or repair of the Product.
THE WARRANTY STATED HEREIN IS THE SOLE AND EXCLUSIVE WARRANTY
FOR CURRENT TECHNOLOGY®PRODUCTS, AND IS IN LIEU OF ALL OTHER
EXPRESS AND IMPLIED WARRANTIES. THOMAS & BETTS POWER SOLUTIONS
SPECIFICALLY DISCLAIMS ALL OTHER EXPRESS AND IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Installation,
operation, or use of the Product for which this warranty is issued shall
constitute acceptance of the terms hereof.
The liability of Thomas & Betts Power Solutions under this warranty is
expressly limited to the replacement or repair of the defective Product or the
defective part thereof, at Thomas & Betts Power Solutions’ sole option.
IN NO EVENT SHALL THOMAS & BETTS POWER SOLUTIONS BE LIABLE FOR
SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY KIND OR
CHARACTER. IN NO EVENT WILL THOMAS & BETTS POWER SOLUTIONS’
LIABILITY EVER EXCEED THE PURCHASE PRICE PAID FOR SUCH DEFECTIVE
PRODUCT.
This warranty is not transferable and may only be enforced by the purchaser.
Claims under this warranty must be submitted to Current Technology®within
thirty (30) days of discovery of any PX3 product defect.
Warranty Period
PX3™15 Years from original date of purchase
15 Year Limited Warranty