Alpha Technologies APX Series User manual

Alpha Technologies
APX Series
Installation and Operation Manual
Effective: April 2006
®
APX Series
Non-standby Power Supply

Power
Alpha Technologies
®

3016-030-B0-005, Rev. C
Contacting Alpha Technologies: www.alpha.com
or
For general product information and customer service (7 AM to 5 PM, Pacific Time), call
1-800-863-3930,
For complete technical support, call
1-800-863-3364
7 AM to 5 PM, Pacific Time or 24/7 emergency support
APX Series
Non-standby Power Supply
016-030-B0-005, Rev C
Effective Date: April 2006
Copyright© 2006
Alpha Technologies, Inc.
A Member of the Alpha Group
Alpha shall not be held liable for any damage or injury involving its enclosures, power supplies, generators,
batteries, or other hardware if used or operated in any manner or subject to any condition not consistent with
its intended purpose, or is installed or operated in an unapproved manner, or improperly maintained.
NOTE:
NOTE:
NOTE:
Photographs contained in this manual are for illustrative purposes only. These photographs may not match
your installation.
Operator is cautioned to review the drawings and illustrations contained in this manual before proceeding. iIf
there are questions regarding the safe operation of this powering system, please contact Alpha Technologies
or your nearest Alpha representative.

4016-030-B0-005, Rev. C
Table of Contents
Safety Notes.......................................................................................................................... 7
1.0 Introduction................................................................................................................. 8
1.1 Operating Principle .......................................................................................... 8
1.2 Standard Configurations................................................................................ 10
1.3 Optional Features .......................................................................................... 12
2.0 Installation................................................................................................................. 14
2.1 Pole Mount Installations................................................................................. 14
2.1.1 Wooden Poles..................................................................................... 14
2.1.2 Concrete and Steel Poles ...................................................................15
2.2 Wall Mount Installations.................................................................................16
2.3 Pedestal Mount Installations.......................................................................... 17
2.4 Rack Mount Installations................................................................................ 20
2.5 Shelf Mount Installations................................................................................ 23
2.6 Connecting Utility Power................................................................................ 24
2.6.1 Wiring the Enclosure Utility Service.................................................... 24
2.7 External Service Disconnect.......................................................................... 27
2.8 Modular Transformer Assembly (MTA) .......................................................... 29
2.9 AC Output Connection................................................................................... 31
2.10 Options........................................................................................................... 32
2.11 APX Output Voltage Reconfiguration............................................................. 39
3.0 Operation..................................................................................................................40
3.1 Start-up and Test............................................................................................ 40
3.2 Shutdown and MTA Removal.........................................................................41
4.0 Troubleshooting and Repair .....................................................................................42
4.1 Return Procedure........................................................................................... 42
4.2 Replacement Parts ........................................................................................ 43
5.0 Specifications............................................................................................................ 44
5.1 APX Schematics............................................................................................ 44
5.2 Specifications for APX.................................................................................... 46

5016-030-B0-005, Rev. C
List of Figures
Fig. 1-1, Ferroresonant “Tank” Circuit and Resulting Output Waveform .............................................. 9
Fig. 1-2, Pole Mount Enclosure...........................................................................................................11
Fig. 1-3, APX Main Transformer Assembly..........................................................................................11
Fig. 1-4, TheAlpha APX (PM) and Installable Options1..................................................................... 13
Fig. 2-1, APX Enclosure Pole Mounting ............................................................................................. 15
Fig. 2-2, Wall Mount Installation ......................................................................................................... 16
Fig. 2-3, Stake Mounting Installed in PED.......................................................................................... 17
Fig. 2-4, PED Enclosure..................................................................................................................... 18
Fig. 2-5, Soil-mount PED Enclosure Installed in Poured Concrete .................................................... 18
Fig. 2-6, Concrete Pad Mounting........................................................................................................ 19
Fig. 2-7, APX Rack Mount (120VAC Version)..................................................................................... 20
Fig. 2-8, Option Placement and Power Connections.......................................................................... 21
Fig. 2-9, APX-E Rack Mount (230VAC Version)................................................................................. 21
Fig. 2-10, Shelf Mount (SM) ............................................................................................................... 22
Fig. 2-11, PED-M, PWE or UPE Enclosure Mounting ....................................................................... 23
Fig. 2-12, PED-M, PWE or UPE Enclosure Mounting ....................................................................... 23
Fig. 2-13, APX Bottom View............................................................................................................... 24
Fig. 2-14, 120VAC/60Hz Wiring.......................................................................................................... 25
Fig. 2-15, APX 230VAC/50Hz Wiring.................................................................................................. 26
Fig. 2-16, Service Entrance/Meter Connections, 120VAC.................................................................. 28
Fig. 2-17, Service Entrance/Meter Connections, 240VAC.................................................................. 28
Fig. 2-18, MTA Mounted on Baseplate Assembly of PM Enclosure ................................................... 30
Fig. 2-19, Universal Bracket for PED-mount ...................................................................................... 30
Fig. 2-20, Cable Connector/Output Port Assembly............................................................................. 31
Fig. 2-21, SIL-C Installed in Baseplate............................................................................................... 32
Fig. 2-22, LA-M Inserted into Receptacle Box ................................................................................... 33
Fig. 2-23, LA-P Inserted into Receptacle............................................................................................ 33
Fig. 2-24, LA-E Option (230VAC models) Mount Under Receptacle Box........................................... 34
Fig. 2-25, LA-E Installation................................................................................................................. 35

6016-030-B0-005, Rev. C
List of Figures, continued
Fig. 2-26, AMM-C Ammeter Kit .......................................................................................................... 36
Fig. 2-27, AMM-C Install Steps........................................................................................................... 36
Fig. 2-28, AMM-C Installation............................................................................................................. 37
Fig. 2-29, TDR-M Potentiometer ........................................................................................................ 37
Fig. 2-30, TDR-M andACAT-3P Options Installed in theAPX............................................................ 38
Fig. 2-31, ACAT-3P and TDR-M Installed in theAPX Rack Mount..................................................... 38
Fig. 3-1, APX Circuit Breaker and Fuse Location...............................................................................40
Fig. 3-2, Shutdown and MTA Removal............................................................................................... 41
Fig. 4-1, APX Schematic..................................................................................................................... 44
Fig. 4-2, APX 90V Schematic............................................................................................................. 45
List of Tables
Table 1-1, Standard Features............................................................................................................. 10
Table 1-2, Optional Features.............................................................................................................. 12
Table 2-1, High-Magnetic Breakers for Square D Service Entrances................................................. 27
Table 2-2, APX Output Voltage Reconfiguration................................................................................. 39
Table 4-1, Troubleshooting Guide....................................................................................................... 42
Table 4-2, Replacement Parts............................................................................................................ 43
Table 5-1, APX Series Specifications ................................................................................................. 46

7016-030-B0-005, Rev. C
Safety Notes
Review the drawings and illustrations contained in this manual before proceeding. If there are any
questions regarding the safe installation or operation of the system, contact Alpha Technologies or the
nearest Alpha representative. Save this document for future reference.
To reduce the risk of injury or death, and to ensure the continued safe operation of this product, the
following symbols have been placed throughout this manual. Where these symbols appear, use extra
care and attention.
A WARNING presents safety information to PREVENT INJURY OR DEATH to the
technician or user.
WARNING!
The use of CAUTION indicates safety information intended to PREVENT DAMAGE to material
or equipment.
CAUTION!
A NOTE provides additional information to help complete a specific task or procedure.
NOTE:
The use of ATTENTION indicates specific regulatory/code requirements that may affect the placement
of equipment and installation procedures.
ATTENTION:

8016-030-B0-005, Rev. C
1.0 Introduction
The Alpha APX Series Non-standby Power Supply provides conditioned power to signal amplifiers in
cable television and broadband distribution systems. The modular design, consisting of a baseplate,
transformer assembly and enclosure cover, supplies the load with current-limited, regulated AC
power, that is free from spikes, surges and other forms of power line transients. The design supports
easy upgrades simply by replacing the transformer assembly, saving time and money.
Alpha’s non-standby power supplies are extremely efficient, with a typical efficiency rating of 90% or
better.
The versatile APX Series includes an AC input circuit breaker, output fuse, *output receptacle,
VSF fitting, and external grounding clamp and can be mounted on poles, walls, racks, shelves, or
pedestals. Operator controls are inside the enclosure on the main transformer assembly.
You can equip the APX with various options, including a *Time Delay Relay (TDR-M), Plug-in
Lightning Arrestor (LA-M), Status Indicator LED (SIL-C), plug-in *Amp-Clamp (ACAT-3P), *Ammeter
(AMM-C), and Enclosure Security Lock (GLK). See Section 1.3 for a complete description of all
available options
1.1 Operating Principle
The Alpha Modular Transformer Assembly (MTA) contains the ferroresonant transformer,
resonant circuit capacitor, and control panel with line input circuit breaker and output fuse
assembly.
The Ferroresonant Transformer
Alpha APX Series uses ferroresonant transformer technology to provide line conditioning and
voltage regulation. The primary and secondary windings of the transformer are physically
isolated from each other by a large steel core which significantly reduces the capacitive
coupling of spikes and noise to the secondary winding. This provides a regulated, current-
limited output with excellent isolation and noise attenuation, (120dB common mode and 60dB
transverse mode).
Another unique feature of the ferroresonant transformer is its ability to provide current limiting
in the event of a short circuit. This effect is called foldback. The transformer’s output current
can typically reach 150% of the nameplate output current rating for a short period of time
without damage to the transformer. When the transformer reaches the saturation point, the
output current will decrease (foldback on itself) to a minimum value, and thereby provide
current limiting. Designs based on ferroresonant transformer are extremely rugged and
reliable offering many years of trouble-free operation.
The Resonant Circuit Capacitor
An oil-filled resonant AC capacitor is connected to the resonant (secondary) winding of
the transformer forming a tank circuit. This provides the resonant circuit function which
contributes to the voltage regulation of the supply. The advantage of this type of transformer/
capacitor design is the ability of the ferroresonant transformer to regulate its output voltage
over a wide range of input voltages and output loading. Typical output voltages may vary
+/- 3% to 5%, with input voltages variations of +/- 15% of nominal line voltage, and output
loading of 20% to 100%. This tight regulation is advantageous in cable television applications
as the active devices are protected from dangerous voltages fluctuations.

9016-030-B0-005, Rev. C
AC power enters the module where it is converted to a “quasi” square wave and regulated (at
the required output voltage). It is then passed on to the load via the VSF fitting located on the
baseplate assembly.
1.0 Introduction, continued
1.1 Operating Principle, continued
Fig. 1-1, Ferroresonant ‘Tank’ circuit and resulting output waveform
A true RMS voltmeter must be used to correctly measure the output voltages.
NOTE:
T1
C1
Clean Output Waveform
Noisy Input Waveform
Ferroresonant Transformer and AC Capacitor

10 016-030-B0-005, Rev. C
1.0 Introduction, continued
1.2 Standard Configurations
The APX Series non-standby power supplies are available in the following configurations:
Available Configurations Description
APX 6008 120VAC, 60Hz Input; 8A, 480VA, 60V Output; available in
Pole, Rack, Wall, Shelf, or Pedestal Mount configurations.
Includes: 8A thermal input circuit breaker, 120VAC output
receptacle and 10A output fuse.
APX 6014 120VAC, 60Hz Input; 14A, 840VA, 60V Output; available in
Pole, Rack, Wall, Shelf, or Pedestal Mount configurations.
Includes: 12A thermal input circuit breaker, 120VAC output
receptacle and 15A output fuse.
APX 6008 E 230VAC, 50Hz Input; 8A, 480VA, 60 or 48V Output;
available in Pole, Rack, Wall, Shelf, or Pedestal Mount
configurations. Includes: 8A thermal input circuit breaker,
230VAC output receptacle and 10A output fuse
APX 6014 E 230VAC, 50Hz Input; 14A, 840VA, 60 or 48V Output;
available in Pole, Rack, Wall, Shelf, or Pedestal Mount
configurations. Includes: 12A thermal input circuit breaker,
230VAC output receptacle and 15A output fuse.
APX 4808 E 230VAC, 50Hz Input; 8A, 384 VA, 48V Output; available in
Pole, Rack, Wall, Shelf, or Pedestal Mount configurations.
Includes: 8A thermal input circuit breaker, 230VAC output
receptacle and 10A output fuse.
APX 6008 P 220VAC, 60Hz Input; 8A, 480VA, 60V Output; available in
Pole, Rack, Wall, Shelf, or Pedestal Mount configurations.
Includes: 8A thermal input circuit breaker, 120VAC output
receptacle and 10A output fuse.
APX 6014 P 220VAC, 60Hz Input; 14A, 840VA, 60V Output; available in
Pole, Rack, Wall, Shelf, or Pedestal Mount configurations.
Includes: 12A thermal input circuit breaker, 120VAC output
receptacle and 15A output fuse
APX 9015 120VAC, 60Hz Input; 15A, 60, 75 or 90V Output;
available in Pole, Rack, Wall, Shelf, or Pedestal Mount
configurations. Includes: 20A thermal input circuit breaker,
120VAC output receptacle and 20A output fuse
APX 9015 240VAC, 60Hz Input; 15A, 60, 75 or 90V Output; available
in available in Pole, Rack, Wall, Shelf, or Pedestal Mount
configurations. Includes: 10A thermal input circuit breaker,
240VAC output receptacle and 20A output fuse.
Table 1-1, Standard Configurations

11016-030-B0-005, Rev. C
1.0 Introduction, continued
1.2 Standard Configurations, continued
Enclosure
Cover
Baseplate
Assembly
Main Transformer Assembly
(MTA)
Fig. 1-2, Pole Mount Enclosure
Holes for
Padlock
Fig. 1-3, APX Main Transformer Assembly

12 016-030-B0-005, Rev. C
1.0 Introduction, continued
1.3 Optional Features
You can equip the APX Series with the following options.See Section 2.10, for installation
instructions.
Option Description Part Number
GLK
Enclosure Locks Security lock for pole mount enclosures. PM models are equipped with a security hole to accomodate a standard
padlock.
GLK-PED: 740-263-22;
GLK-PM: 744-229-21
LA-M
Plug-in Lightning Arrestor
LA-E (230VAC)
The LA-M is a 350 joule, Metal Oxide Varistor (MOV) for
primary site protection. It provides protection from voltage
spikes caused by lightning and other disturbances. The
LA-M is enclosed in plastic housing and plugs directly into
a dedicated receptacle, eliminating the need for additional
wiring.
LA-E housed in an aluminum enclosure and must be hard
wired into the APX.
LA-L120V: 744-173-20;
LA-E240V: 744-174-20
LA-P+120V:020-098-24
LA-M120V: 020-116-21
(x2 for 240V)
SIL-C
Status Indicator LED Indicates that the APX is supplyingAC output to the load and can be viewed from outside the enclosure. The light
(red) remains ON as long as power is present at the
modules output.
740-239-21
The following options are available for the APX Series power supplies only
AMM-C
Ammeter Displays the output current to the load. It is also useful as a status indicator: a zero reading indicates no output current
is being drawn by the load, a pegged meter indicates a
short circuit condition in the plant.
10A :
740-238-21
15A :
740-238-22
15A:
(9015 only)
744-594-20
TDR-M
Plug-in Time Delay Relay In the event of a AC utility line outage and subsequent voltage return, the TDR-M delays power to the output for 10
to 60 seconds, thereby providing time for the line voltage
to stablize and reducing possible noise spikes and other
transients.
60V:
020-114-21
90V:
020-114-23
ACAT-3P
Plug-in Amp Clamp Protects active and passive equipment from voltage surges and transients. Provides “Crowbar” clamping protection
from voltage spikes in excess of 104V.
Consists of two rugged SCR’s (silicon controlled rectifiers)
connected in an inverse parallel configuration with a steady
state current of 35A and a one cycle (8 ms) pulse rating of
500A. The SCR’s are triggered into conduction whenever
the Amp Clamp’s bidirectional trigger diodes senses the
presence of voltage transients exceeding 104-115V peak
threshold. The fast response trigger circuit gates the
appropriate SCR ON (in nanoseconds) to shunt the surge
current to ground, effectively protecting sensitive equipment
from transient overvoltage conditions.
60V:
020-115-21
90V:
020-115-23
Table 1-2, Optional Features

13016-030-B0-005, Rev. C
1.0 Introduction, continued
1.3 Optional Features, continued
See Table 1-1 for a complete description of these features.
Fig. 1-4, TheAlpha APX (PM) and Installable Options
®
GLK
Enclosure
Locks
Enclosure
Cover
LA-M
SIL-C
AMM-C
Modular
Transformer
Assembly (MTA)
ACAT-3P
TDR-M

14 016-030-B0-005, Rev. C
NOTE:
NOTE:
Poles are typically the property of the local utility. The utility must approve both the location and the
method used to mount the APX before installation.
Before installing the MTA, verify that all options have been installed and properly connected.
2.1.1 Wooden Poles
For wooden poles, use mounting bolts that completely penetrate the pole.
Materials Required:
Two (2) 5/8" diameter machine bolts (UNC thread) SAE Grade 5 or better, length
to suit pole
Four (4) 5/8" diameter zinc-plated flat washers
Two (2) 5/8" diameter hex nuts (UNC thread)
Tools Required:
Auger or drill for boring 3/4" diameter holes through the wooden pole
Associated sockets or wrenches
Procedure:
Remove the APX from the shipping container and set the unit on its back (mount-
ing bracket down).
Loosen the enclosure front panel hold-down screw and tilt the cover forward.
Remove the cover by sliding it (at the hinges) to the right.
Loosen the captive screw at the bottom of the baseplate. Lift the Modular
Transformer assembly up and off of the baseplate. Set the MTA aside.
Mark the position for the upper mounting bolt on the utility pole. Drill a 3/4" hole
completely through the pole.
Using the baseplate as a template, align the upper hole in the baseplate with the
upper hole in the utility pole. Verify that the spacing between the marks is 4 1/2"
center to center. Drill the lower mounting hole.
Place a flat washer on each bolt and insert the mounting bolts through the base-
plate assembly and pole.
Secure both bolts using a 5/8" washer and nut. Tighten nuts until the flanges on
the baseplate mounting bracket dig into the wood approximately 1/4".
Install the Modular Transformer Assembly (MTA) onto the baseplate (see Section
2.8).
•
•
•
•
•
1.
2.
3.
4.
5.
6.
7.
8.
2.0 Installation
2.1 Pole Mount Installations
The APX-PM can be mounted on wooden, steel, or concrete poles. Most local codes require
that the base of the enclosure be at a minimum height from the ground. Always verify height
restrictions before proceeding.

15016-030-B0-005, Rev. C
2.1.2 Concrete and Steel Poles
Materials Required:
Two (2) 1-1/2" approved mounting straps, length to suit pole.
Tools Required:
Assorted sockets or wrenches
Procedure:
Mark the position for the upper mounting strap on the utility pole.
Run two approved 1-1/2" mounting straps through the mounting bracket located
on the back of the baseplate assembly.
Center the baseplate assembly on the pole and tighten the mounting straps.
Install the Modular Transformer Assembly (MTA) onto the baseplate (see Section
2.8 for details).
1.
2.
3.
4.
2.0 Installation, continued
2.1 Pole Mount Installations, continued
Fig. 2-1, APX Enclosure Pole Mounting
VSF Output Connector
NOTE: If mounting to a
steel or concrete pole, use
these two strap slots
#8 AWG (Minimum)
Copper Ground Wire
Cable Output
Utility Power Input
(from Service Entrance)
Enclosure Mounting Bracket
5/8" Diameter Bolts and
Associated Hardware
Service Drop
To Service
Entrance
APX Enclosure
4 1/2”
center-center

16 016-030-B0-005, Rev. C
Install and connect all optional features before you install the MTA.
NOTE:
Procedure:
Mark the location of the wall mounting holes, using
the bracket as a template. The distance between the
holes is 4 1/2 inches center-to-center.
Drill the holes using a 1/4" drill bit. Mount the bracket
to the wall using two 3/8" x 1 1/2" long steel lag bolts
and washers. The 1/4-20 (Phillips) screw must be
located in the upper right-hand side of the bracket
before you secure it to the wall.
To mount the enclosure to the wall bracket, fit the
slots (in the APX enclosure bracket) over the rivets in
the wall bracket. The enclosure bracket fits over the
outside of the wall bracket.
Tighten the screw located on the upper-right corner of
the wall bracket using a #2 Phillips head screwdriver.
Install the Modular Transformer Assembly (MTA) onto
the baseplate. See Section 2.8 for details.
1.
2.
3.
4.
5.
2.0 Installation, continued
2.2 Wall Mount Installations
The wall mount version is equipped with an adaptor bracket to ensure that the APX pole
mount enclosure can be mounted on a flat, vertical surface. If the wall mount bracket cannot
be installed on a flat, vertical surface and positioned over a wall stud (2x4; 2x6; etc), use
appropriate anchors and lag bolts.
1/4-20 Screw
(upper-right hand
side)
Wall Mounting
Holes
Step 1, Wall Bracket
Align slots with rivets and screw
Step 2, Aligning slots
Tighten screw
Step 3, Tighten screw
Fig. 2-2, Wall Mount Installation

17016-030-B0-005, Rev. C
2.0 Installation, continued
2.3 Pedestal Mount Installations
The pedestal mount (PED) is constructed of weather-resistant steel and is ideal for ground
mount applications. The PED model is supplied with a stake for soil-mounting applications.
An optional concrete mounting kit may be ordered for mounting to a concrete pad.
NOTE:
Before you install the MTA, first install and connect optional features.
NOTE:
Install the pedestal enclosure above the flood plane and locate it in an area safe from damage caused
by traffic accidents, lawn equipment, or other hazards.
When you sink the stake into the soil be extremely careful not to damage any underground cabling,
utility wires, water or gas pipes. Your local utility company can tell you the location of these items.
Procedure: (Soil Mount)
Before proceeding, loosen the hex screw located on the right side of the enclosure. Lift off
the hood and remove the MTA (if installed), and Universal Bracket (UB1) from the PED. The
UB1 is secured by a wing-nut located near the top of the PED.
Locate the area to install the PED. Create a slight depression in the soil, 6" deep x 14"
wide. This provides room to work while you are installing the PED, and additional security
and stability.
Drive the mounting stake into the soil at the chosen location, leaving about 6" of the stake
above the soil depression. The stake must be completely vertical.
Place the PED over the utility and cable feeds. Align two of the holes in the back of the
enclosure with two holes in the stake. Secure the enclosure to the stake using the two
bolts, washers and nuts provided.
Move soil around the outside of the enclosure to level the area. For additional stability,
soil can be added inside of the enclosure to bring it level with the outside soil line.
Reinstall the UB1 Bracket and place the MTA on the bracket. Tighten the captive screw
on the bottom of the UB1 to secure the MTA, (See Section 2.6 Connecting Utility Power,
and 2.8 Modular Transformer Assembly).
1.
2.
3.
4.
5.
CAUTION!
Fig. 2-3, Stake Mount
Installed in PED

18 016-030-B0-005, Rev. C
2.0 Installation, continued
2.3 Pedestal Mount Installations, continued
Mounting Stake
Poured Concrete
Utility
Cable
®
3" to 4"
Fig. 2-5, Soil Mount PED Enclosure Installed in Poured Concrete
Fig. 2-4, PED Enclosure
PED Enclosure Hood
Mounting Stake
and Hardware
Wing nut
PED-Universal
Bracket (UB1)
PED Enclosure
Base Unit
NOTE:
If a more secure configuration is required, mount the enclosure level with the surrounding soil (with no
depression), place a wooden form around the outside of the enclosure, and pour concrete to a depth of
3 or 4 inches.

19016-030-B0-005, Rev. C
2.0 Installation, continued
2.3 Pedestal Mount Installations, continued
You can mount the PED enclosure to a concrete pad using the optional mounting bracket.
The bracket mounts inside the rear of the enclosure using two hex bolts and washers. There
are two 0.5" oblong mounting holes in the bracket to mount the enclosure to the concrete
pad.
Place two (2) 3/8" J-bolts in the pad as specified and center two conduits (utility and cable
output) in front of these bolts. If required, place an 8' dedicated ground rod near the utility
conduit. To mount the enclosure to the pad, use a 3/8" lock washer and nut on each mounting
bolt.
Procedure: (Concrete Mount)
Before proceeding, remove both the MTA (if installed) and universal bracket (UB1) from the
PED.
Install the concrete mounting bracket on the enclosure using the included bolts,
washers and nuts. Insert the bolts from the outside of the enclosure.
Center the enclosure over the utility and cable conduits. Align the oblong holes in the
mounting bracket with the 3/8” J-bolts. Secure the enclosure with a lock washer and
nut.
Reinstall the UB1 bracket and place the MTA on the bracket. Tighten the captive screw
on the bottom of the UB1 to secure the MTA (see Section 2.6 Connecting Utility Power,
and 2.8 Modular Transformer Assembly).
1.
2.
3.
NOTE:
To prevent damage, you must mount the enclosure on a flush smooth surface. Do not over-torque.
Alpha Technologies is not responsible for damages incurred to the enclosure by improper mounting on
uneven surfaces.
PED Mounting Holes
Pad Mounting
Slots
Concrete Mounting
Bracket and Hardware
Concrete Mounting Bracket
Installed in Unit
Fig. 2-6, Concrete Pad Mounting

20 016-030-B0-005, Rev. C
Procedure:
To mount the APX into a standard 19" rack, secure the APX to the rack rails, using 10-32
screws and cup washers (not supplied). To provide clearance when other equipment is
installed in the rack, leave an inch above and below the 7” panel height.
The APX is supplied with an additional 3 three-foot (1.0m) power cord to connect the
short cord on the rack mount APX to the standard receptacle box.
The APX is now ready for operation (see Section 3.1, Start-up and Test).
1.
2.
3.
NOTE:
Install and connect all optional features, before installing the MTA.
2.0 Installation, continued
2.4 Rack Mount Installations
The APX is also available in a rack mount version that can be installed into a standard 19"
rack.
You can stack other APX power supplies in the same rack without additional clearance
between the power supplies, as long as you leave sufficient clearance between the top and
bottom supplies in the stack, adjacent equipment, and walls.
If you are using an enclosed rack or cabinet, leave at least 2" clearance between the
transformer and surrounding wall panels, and provide ventilation through the use of louvered
rear panels (or leave open if possible).
Fig. 2-7, APX Rack Mount (120VAC Version)
LA-P Receptacle
Rack Mounting Slots
Fuse
Push-Push Circuit Breaker
TDR-M Adjustment Access Hole
SIL-C
Ammeter