This manual covers the installation of the PN-3 and PN-4 Enclosure. Installation may involve connection to the electrical
utility lines and fuel vapor (Natural Gas or Propane). Always work with the local utilities when connecting the enclosure to
these utilities and observe all local and national laws which may be applicable for your area. Refer to Section 2, PreInstallation, for siteplanning and preparation.
Photographs contained in this manual are for illustrative purposes only. These photographs may not exactlymatch your
installation.
Review the drawings and illustrations contained in the manual before proceeding. If there are questions regarding the
safe installation and operation of this enclosure or the Powering System, please contact Alpha Technologies or your nearest
Alpha representative.
To contact Alpha Technologies:
For general product information and customer service
1-800-863-3930
(7:00 AM to 5:00 PM Pacific Time )
For complete technical support
1-800-863-3364
(7:00 AM to 5:00 PM Pacific Time, or 24/7 emergency support)
Figure 1-1; Enclosure as it Arrives from Alpha ...................................................................................................................... 9
Figure 2-1; Suggested Site Selection, PN-3 and PN-4 ......................................................................................................... 11
Figure 2-2; Single-Wide Concrete Pad for PN-3 and PN-4 ................................................................................................... 12
Figure 2-3; Suggested Grounding, PN-3 and PN-4 .............................................................................................................. 13
Figure 2-4; Alternate Grounding, PN-3 and PN-4 ................................................................................................................ 14
Figure 3-1; PN-3 Mounted to the Prepared Pad ................................................................................................................... 15
Figure 3-2; BBX-100A-8POS Service Disconnect.................................................................................................................. 17
Figure 3-3; BBX-70A Service Disconnect.............................................................................................................................. 18
Figure 3-4; Schematic: Primary Service BBX-100A-8POS with IPP-240-3 ........................................................................... 19
Figure 3-5; Schematic: Primary Service BBX-100A-8POS with IPP-120-3 ........................................................................... 19
Figure 3-6; Schematic: Secondary Service BBX-100A-8POS with IPP-120-2 ....................................................................... 20
Figure 3-7; Schematic: Secondary Service BBX-100A-8POS with IPP-240-2 ....................................................................... 20
Figure 3-8; Schematic: Secondary Service BBX-70A with IPP-120-1 ................................................................................... 21
Figure 3-9; Schematic: Primary Service BBX-70A with IPP-240-1 ....................................................................................... 21
Figure 3-10; Connector Fitting in Rear of Equipment Tray.................................................................................................... 22
Figure 3-11; Location of SPI in Equipment Tray .................................................................................................................... 22
Figure 3-12; SPI Ground Wire Connected to Enclosure Ground Bar ..................................................................................... 22
Figure 4-2; Black Clip in Place............................................................................................................................................. 33
Figure 4-10; IPP for Three Power Supplies............................................................................................................................ 35
Figure 4-11; IPP for Two Power Supplies............................................................................................................................... 35
Figure 4-12; IPP for One Power Supply ................................................................................................................................. 35
Figure 4-13; Breaker Duplex Option (BDO) for One Power Supply......................................................................................... 35
Figure 4-14; Cooling Fan Panel............................................................................................................................................ 36
Figure 4-15; Panel is Installed in Top Rear of Enclosure...................................................................................................... 36
Figure 4-16; Cooling Fan Plugged into Power Supply and SPI.............................................................................................. 36
Figure 4-17; LA-P+ Installed in BDO ................................................................................................................................... 37
Figure 4-18; Location of LED on LA-P+. ............................................................................................................................... 37
Figure 5-1; Single-Wide Pad, for CE8/9 or PN 3/4 ............................................................................................................... 39
Figure 5-2; Double-Wide Pad, for CE8/9 or PN 3/4 .............................................................................................................. 40
Figure 5-3; Double-Wide Pad, for CE 3x2/9x2 and CE8/9 or PN 3/4 .................................................................................... 41
Important Safety Instructions Used Throughout this Manual
To reduce the risk of injury or death caused by electrical shock, explosion of fuel or moving parts; 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.
CAUTION
HAZARDOUS CONDITION
Dangerous Voltage
This symbol indicates a “dangerous voltage” may exist in this area of the product. Use caution whenever
working in the area to prevent electrical shock.
Inhalation Hazard - Don't Breathe Vapors
This symbol indicates an “inhalation hazard” may exist in this area of the product. Use caution
whenever working in the area to prevent possible inhalation of harmful (fuel or exhaust) vapors.
No Matches or Open Flames
This symbol indicates a “fire or explosive hazard” may exist in this area of the product. Use caution
whenever working in the area to prevent possible combustion of fuel vapors.
Mechanical or Moving Parts Hazard
This symbol indicates an “mechanical or moving parts hazard” may exist in this area of the product.
Use caution whenever working in the area to prevent possible injury to the operator or service personnel.
Leak Hazard
This symbol indicates a “leak hazard” may exist in this area of the product. Use caution whenever
working in this area to prevent and correct any leaks detected.
Attention
This symbol indicates important installation, operation or maintenance instructions. Always follow
these instructions closely.
031-103-B0-003 Rev. C
Save these instructions for future reference.
NOTE:Alpha Technologies’ products are subject to change through continual improvement
processes. Therefore, specifications and/or design layouts may vary slightly from
descriptions included in this manual. Updates to the manual will be issued when
changes affect form, fit or function.
•The system must be installed only by qualified service personnel.
•Always consult local codes for mounting pad requirements.
•Consult local utility codes for additional cabinet grounding and utility requirements.
•Consult the local gas company for correct meter type and riser location.
•Whenever possible, it is best that the enclosure be installed above flood zones .
•Precast Mounting Pads may either be purchased from Alpha or poured in place. The pad must be
capable of holding 1,000 lbs (minimum). Rebar may be placed in a crosshatch pattern for pad
reinforcement, as needed.
•If the pad is to be located in an area with a deep frost line or unstable soil, concrete pylon footings (4"
diameter X 4' deep, or 1' deeper than the regional frost line) can be placed below the concrete pad, in
front of and below the (4) mounting features.
•The top of the pad must be above grade to reduce the buildup of debris around the base of the cabinet.
•Adequate space must be allowed for Cable TV input/output conduit; plant grounding electrode
conductor(s); RF cable entrance via (1) 4", (2) 3" or (3) 2 1/2" rigid conduit sweep(s) with 2' bend radius
(minimum); and fiber optic cable entrance (refer to fiber manufacturer's specification for minimum
bend radius requirements).
•Prior to pouring concrete, any wire running through the pad must have a thermal expansion jacket (i.e.,
PVC) to prevent cracking of the concrete during lightning strikes.
•Alpha Technologies is not responsible for broken welds or other damage to the cabinet caused by
improper installation.
•A 25+ year vapor barrier must be used between the concrete pad and the base of the enclosure to further
inhibit the ingress of moisture. Alpha Technologies is not responsible for water damage or moisture
damage resulting from improper installation.
•Concrete filled, 6" diameter steel posts (or equivalent) can be placed at the corners of the pad to reduce
exposure to accidental traffic damage.
•All dimensions are given in inches.
•For further information regarding this installation, contact Alpha Technologies or your nearest Alpha
representative.
•Enclosures must be installed only by qualified personnel and in accordance with all applicable electrical
codes.
•Use eye protection whenever working with batteries.
•Use only sealed, lead-acid type batteries (gelled-electrolyte or equivalent, 65 Ah min.)
Unpacking and Inspection:
Carefully remove the enclosure from the shipping container. Verify that:
•The correct unit was shipped (either Alpha PN-3 or PN-4 enclosure).
•Ordered options have been included. (Refer to packing label details located on wooden pallet. See
figure 1-2)
NOTE:Batteries are shipped separately.
1. Introduction
Figure 1-1; Enclosure as it Arrives from Alpha
Figure 1-2; Packing Label Location
Inspect the contents. If items are damaged or missing, contact Alpha Technologies and the shipping company immediately .
Most shipping companies have only a short claim period.
Alpha's PN Series Power Module enclosures offer complete flexibility and modular expendability for Cable TV powering
applications. The Modular Tray system simplifies installation while allowing for future expansion or reconfiguration. The PN
Series is designed to accommodate current system power requirements while allowing the cost-effective addition of power
capacity, as well as enhanced reliability options, when new services are integrated. Excellent for either distributed or
centralized powering architectures, PN Series enclosures are available to accommodate multiple power supplies, battery
strings and/or natural gas or propane generators
Power Supply Capacity: Up to three power supplies (6kW)
Weight: 100-170 lbs ( depending on options)
Figure 1-3; PN-3 Specifications
Dimensions: 26" W x 44" H x 24" D
Material: Aluminum, .080-.125 inches
Power Supply Capacity: Up to three power supplies (6kW)
The site must be planned so that the enclosure will receive good air flow. If possible, in areas of extreme heat, it is best to
position the enclosure so that it will be shaded from the afternoon sun. In areas of prevailing winds, it is best that the
enclosure be located so that the sides of the cabinet face the winds instead of the doors. This will greatly reduce the buildup
of sand or snow against the enclosure’s air vents.
In areas of potential flooding, the geographical site and concrete pad must be located above the flood plain. Pedestals are
available to raise the Power Node enclosures above expected snow and water levels.
The enclosure must be placed where it will be free of obstructions, allowing easy access to the doors for service or equipment
access. For ventilation and maintenance, allow a minimum space of 36 inches in the front and 36 inches in the rear, between
the enclosure and other solid structures.
Place the enclosure well away from ground level sources of forced water, such as underground sprinkler systems and direct
roadway splash.
The concrete pad drawing is provided in the Pre-Installation Section of this manual contains all of the required mounting
details, including electrical service and cable plant entrances.
The vapor barrier material (such as 30 lb. felt, neoprene pond liner, or heavy grade tar paper) must initially extend at least
6" in all directions around the perimeter of the enclosure and be trimmed closer to the enclosure, using the appropriate utility
knife or cutting tool.
WARNING:
Never transport the unit with batteries installed. Batteries must ONL Y be installed after the
unit is transported to the site and secured to the pad. Transporting the unit with batteries
installed may cause a short circuit, fire, explosion, and/or damage to the battery pack,
enclosure and installed equipment. Damage caused by improper shipping or transporting a
unit with batteries installed is not covered under warranty.
Figure 2-1; Suggested Site Selection, PN-3 and PN-4
TM
11
House
031-103-B0-003 Rev. C
Page 12
2. Pre-Installation
2.2Concrete Pad Preparation
Pads can either be poured on site, or precast by Alpha Technologies. A vailable concrete pad configurations and part numbers
can be found in section 5, "Alpha Part Numbers".
5
1
4
7
2
8
6
7
Figure 2-2; Single-Wide Concrete Pad for PN-3 and PN-4
All dimensions shown in inches. Mounting holes and sweeps indexed from this position.
1
Indicates PN-3 and PN-4 pedestal enclosure mating surface.
2
3
3
4
5
6
7
8
031-103-B0-003 Rev. C
Alpha standard; recommended distance (6" minimum) between edge of pad and cabinet.
Four inch diameter hole for AC power IN (non-metered installation).
Four inch diameter opening for DC Output cable and Status Monitoring harness.
All mounting hardware must be stainless, galvanized, or better to prevent corrosion.
5" x 8" rectangular cutout (2 places), open area for all internal connections including: generator power
and/or coax cable conduit sweeps.
A 25+ year continuous vapor barrier must be used between the enclosure and the pad to prevent
moisture ingress and possible corrosion caused by metal to concrete contact. The vapor barrier material
(such as 30 lb felt, neoprene pond liner, or heavy grade tar paper) must be initially extended at least 6"
in all directions around the perimeter of the enclosure. After the enclosure is secured to the pad, the
material can be cut closer to the enclosure, using the appropriate knife or cutting tool.
When the electrical supply is a primary service (not a secondary or feeder service) a #2 bare copper wire
4
must be bond the lightning protection loop to the Grounding Electrode Conductor where they are closest.
Service Grounding (required)
#6 bare copper wire from Service Neutral / Ground Bar with 2 ground rods located 6' apart.
5
TM
13
031-103-B0-003 Rev. C
Page 14
2. Pre-Installation
2.3Enclosure Grounding,
Side view
UFER Ground
30 inches
SE
conduit &
wires
separation
is required.
GEC
#2 bare
copper
No
wire
5
20 feet (minimum)
#2 AWG
continued
&
211(&7,210$'(:,7+
%
31<*+5&:
3
#2 AWG
4
851'<&211(&725
(48,9$/(17
Opening for
Sweeps
Opening for
Sweeps
25
Enclosure Footprint
Opening for
Sweeps
t
e
e
f
n)
i
2
(m
2
1
&
211(&7,210$'(:,7+
%
31<*+3&:71
Figure 2-4; Alternate Grounding, PN-3 and PN-4
Lightning Protection (Optional)
1/2" x 8' copper ground rod, four places, driven about 2 feet (typical) from the corners of the pad.
1
#2 bare copper wire loop terminated to each ground rod and buried below grade 2 to 12 inches.
2
Corrosion-proof connections (25+ year life-span) and hardware suitable for direct burial MUST be used.
#2 bare copper wire from loop to the enclosure
3
When the electrical supply is a primary service (not a secondary or feeder service) a #2 bare copper wire
4
must be bonded to the lightning protection loop to the Grounding Electrode Conductor where they are
closest.
Service Grounding (required)
851'<&211(&725
25(48,9$/(17
5
031-103-B0-003 Rev. C
#2 bare copper wire from Service Neutral / Ground Bar down 30 inches and out 20 feet beyond the pad
edge. This is often called a UFER ground (Ground Ring in the NEC).
The PN-3 or PN-4 cabinet as shipped weighs approximately 100-150 lbs. A safe means of transportation to the site and a
safe procedure for unloading the enclosure is necessary. Do not transport or lift with a device that may not be able to bear
the unit's weight, and do not place the unit upon a surface that will not be able to fully support it.
NOTE:Enclosure must always remain in the upright position during the shipping, storage and installation
process. Damage may result from enclosure being shipped or stored on its side.
NOTE:Electronic modules, batteries or other components must not be installed until the enclosure is securely
set in place at its permanent location.
3.2Enclosure Mounting Procedure
The enclosure bolts directly to the concrete pad. Mounting holes are provided in the base of the internal enclosure rack to
accommodate the pad’s 3/8" stainless or galvanized anchor bolts.
1.Place vapor barrier material on pad and make cutouts for anchoring hardware and other openings as
necessary. A 25+ year vapor barrier
moisture ingress and to prevent corrosion caused by concrete-to-metal contact.
MUST be used between the concrete and enclosure base to inhibit
2.With no less than two field personnel lifting the enclosure, position it above the concrete pad and slowly
lower it into position over the pad's 3/8" anchor bolts.
3.Secure the enclosure using stainless, galvanized (or better) flat washers, lock washers and 3/8" nuts at
each mounting bolt.
NOTE:Enclosures must be mounted flush with a smooth surface. If the concrete pad is uneven or has
bumps, cracks or other imperfections, the installer is responsible for correcting these defects prior
to installing the enclosure.
4.Install electronic modules and batteries at this time.
The XM2 Power Supplies are powered by either 120VAC or 240VAC (depending upon the model), attached to an external
service entrance. The size of the service conductors must be based upon the actual size of the utility service and be in
accordance with applicable electrical code requirements.
The utility conduit may be placed in one of two locations, depending upon the utility service entrance requirements. Note the
optional conduit location for use with meter base and the standard location for entry directly to the load center.
Proper grounding is critical. The enclosure MUST have a hard-wired ground to the service entrance. A qualified electrician
will need to verify that grounding is in compliance with applicable electrical codes. (Refer to section 2.3, "Enclosure
Grounding".
NOTE:All applicable codes must be adhered to when installing a system, pouring concrete, or placing a
preformed pad. These codes supersede any procedures outlined in this document.
NOTE:All mounting hardware must be
conditions. Use of improper hardware may cause corrosion, which is not covered under warranty.
NOTE:Soil conditions vary and may affect the integrity of the pad. Alpha Technologies r ecommends that
proper steps be taken to ensure that the soil supporting the pad is stable. Improper installation
of the pad may cause uneven settling or cracking, which is not covered under warranty.
Both standard and EUSERC style meter bases are available for some configurations as illustrated in the following
figures. Consult Alpha Technologies or your local representative regarding compatibility with your specific application.
CAUTION:The following utility powering procedures must be performed only by qualified service personnel
and in compliance with local electrical codes.
Verify electrical codes prior to installation. Codes may vary and contain specific conduit and wire sizes for
connection to the service entrance.
Connection to utility power must be approved by the local utility before installing the power supply.
The enclosure is equipped with a Square D, rainproof service entrance (SUSE rated). The service entrance is equipped with
a circuit breaker for a 120/240VAC, split phase, 3-wire w/GND source.
Materials Required:
stainless
or
galvanized
, depending on local environmental
031-103-B0-003 Rev. C
1" diameter conduit (or larger)- PVC or Galvanized Steel (threaded)
#6 AWG - Red /stranded insulated wire
#6 AWG - Black / stranded insulated wire
#6 AWG - White / stranded insulated wire
#2 AWG or larger - Stranded copper ground wire
3.3.1Connection Procedure for the BBX-100A-8POS Service Disconnect:
1.Locate the service entrance panel on the enclosure (exterior). Remove the cover to access the circuit
breaker assembly. If this service panel is to be used as the primary service entrance, neutral must be
bonded to ground by installing the green ground screw (provided) in the hole in the neutral bus.
2.Remove the knockout located at the base of the service entrance to accept the conduit.
3.Install the conduit nipple into the service entrance via the knockout and secure with the appropriate
threaded conduit locknut.
4.Locate the two screw terminals (L1 and L2) on the bottom of the input circuit breaker.
5.Connect one of the incoming Black #6 AWG wires to L1 (left terminal). Connect the remaining Black (or
Red) #6 AWG wire to L2 (right terminal). NOTE: If the wire at L2 is Black, Mark it with red tape (or label).
6.Connect the #6 AWG White wire to the neutral (N) bus lug located to the top right of the circuit breaker
assembly.
7.Connect the #6 Bare solid or stranded for Grounding Electrode Conductor (Earth Ground) to the ground
and neutral bus located to the right side of the circuit breaker assembly.
8.Notify the electrical inspector to approve the service entrance wiring. Once approved, contact the local
power utility for electrical service.
Bond made by bonding screw only if no other service panel is used. (Must be installed on site only if this
1
is the primary service entrance.)
TM
17
031-103-B0-003 Rev. C
Page 18
3. Installation
3.3Utility Powering,
continued
3.3.2Connection Procedure for the BBX-70A Service Disconnect:
1.Locate the service entrance panel on the enclosure (exterior). Remove the cover to access the circuit
breaker assembly. If this service panel is to be used as the primary service entrance, neutral must be
bonded to ground by installing the green ground screw (provided) in the hole in the neutral bus.
2.Remove the knockout located at the base of the service entrance to accept the conduit.
3.Install the conduit nipple into the service entrance via the knockout and secure with the appropriate
threaded conduit locknut.
4.Locate the two screw terminals (L1 and L2) on the top of the input circuit breaker.
5.Connect one of the incoming Black #6 AWG wires to L1 (left terminal). Connect the remaining Black (or
Red) #6 AWG wire to L2 (right terminal). NOTE: If the wire at L2 is Black, mark it with red tape (or label).
6.Connect the #6 AWG White wire to the neutral (N) bus lug located to the top right of the circuit breaker
assembly.
7.Connect the #6 Bare solid or stranded for Grounding Electrode Conductor (Earth Ground) to the ground
and neutral bus located to the right side of the circuit breaker assembly.
8.Notify the electrical inspector to approve the service entrance wiring. Once approved, contact the local
power utility for electrical service.
Neutral
Line 1
1
Line 2
Grounding Electrode
Conductor
1
031-103-B0-003 Rev. C
Figure 3-3; BBX-70A Service Disconnect
Bond made by bonding screw only if no other service panel is used. (Must be installed on site only if this
is the primary service entrance.)
Battery systems represent a risk of electrical shock and high short circuit currents. The following precautions
must be observed when maintaining batteries:
•Remove all personal metal objects (watches, rings, etc.)
•Use insulated tools.
•Wear eye protection and rubber gloves.
•Observe circuit polarities.
•Do not make or break live circuits.
•Do not lay metal tools and hardware on top of the batteries.
The battery is enclosed in cabinets with limited access. Again, extreme caution must be exercised when maintaining
and collecting data on the battery system.
Disposal
•Lead acid batteries are to be recycled. Batteries contain lead and dilute sulfuric acid. Dispose of in accordance
with Federal, State, and local regulations. Do not dispose of in a landfill, lake or other unauthorized location.
Chemical Hazards
•Any gelled or liquid emissions from a battery is electrolyte, and contains dilute sulfuric acid which is harmful to
the skin and eyes; is electrically conductive; and is corrosive.
•If electrolyte contacts the skin, wash immediately and thoroughly with water. If electrolyte enters the eyes, wash
thoroughly for 10 minutes with clean water or a special neutralizing eye wash solution and seek immediate medical
attention.
•Neutralize any spilled electrolyte with the special solutions contained in a “spill kit” or with a solution of 1 lb.
bicarbonate of soda to 1 gallon of water.
Fire, Explosion, and Heat Hazards
•Lead acid batteries can contain an explosive mixture of hydrogen gas which can vent under overcharging conditions.
•Do not smoke or introduce sparks in the vicinity of the battery.
•Do not charge batteries in a sealed container. The individual batteries must have 0.5 inches of space between
them to allow for convection cooling. If contained, assure the container or cabinet and room have adequate
ventilation to prevent an accumulation of potentially vented gas.
Each battery contains a DATE CODE usually located near the positive (+) terminal of the battery. This date code
must be recorded in the maintenance log (
used, consult the battery manufacturers’ documentation for date code type and placement.
MAINTENANCE
manual). If batteries other than those installed by Alpha are
0702
MONTH: (JUL) 07
YEAR: 2002
Figure 3-15; Alpha Cell Battery Date Code
3.5.3Battery Terminal Connections
The accompanying drawings are for
styles and hardware may be shipped with the system. ALWAYS refer to the battery manufacturer's specifications for
correct mounting hardware and torque requirements. During maintenance procedures, refer to the manufacturer's
specifications for the maintenance torque requirements.
Mounting hardware requirements may vary with battery manufacturers. Use only the hardware recommended by
your particular battery manufacturer.
NOTE:Use a corrosion inhibitor (such as NCP-2) on battery terminals.
illustrative
purposes only. Various types of batteries with different mounting
These illustrations show the Battery Terminal assembly for vertically mounted battery posts. Refer to the battery
manufacturers’ specifications for tightening torque.
Battery Cable
Flat Washer
Split Washer
Nut
Figure 3-17; Vertically Mounted Battery Post
Battery Terminal
Flat Washer
Bolt
3.5.5Battery Installation Procedure
1.Place the batteries on their respective shelves as shown in Figure 3-18; "Battery Installation Arrangement"
on the next page.
2.Connect the three (or four) batteries in series (negative to positive) to achieve 36VDC (or 48VDC). Route
the battery cables inside the vertical rail for connection to the power supply. Terminal connectors must
be torqued to approximately 75 inch/pounds at installation and then re-torqued to 50 inch/pounds
during routine maintenance.
3.Use a voltmeter to verify polarity and DC voltage at the module's battery connector.
4.Mate the battery connectors to their respective sockets on the power supply module.
5.Number the batteries 1, 2, 3, (4) using labels, masking tape, or china marker. Record each battery's
6.For installations with multiple battery strings in parallel, each string must be fused. Verify that the
031-103-B0-003 Rev. C
NOTE:The cables are marked with a RED sleeve to indicate the (+) positive battery terminal.
CAUTION:Whenever making or breaking battery connections, never allow live battery cables to
contact the chassis. If necessary, wrap the lugs with electrical tape to prevent arcing
and temporarily disconnect one of the leads from the center battery. Check the battery
voltages at the connectors leading into the XM power supply.
NOTE:Ensure that voltage and polarity are correct before proceeding.
number and date code in the power supply's maintenance log.
enclosure was ordered with a fused Battery Cable Kit (BCK). For replacement fuses, or to add fuses to
a BCK without fuses, order the Battery Terminal Fuse Kit, Alpha part number SPB98-645-1.
See section five, "Alpha Part Numbers" for PN Series options shown in this section.
The Star Lock Security Bolt kit comes factory installed when ordered with a new enclosure. The kit can also be added to
existing enclosures using the procedure below.
NOTE:The Security Key is a special tool that must be ordered separately. Alpha recommends ordering security
keys for each maintenance crew.
1). Drill dimple located approximately half way down enclosure doors.
®
Figure 4-1; Security Bolt Location
2). Place black clip over flange and align with factory-drilled hole in flange.
Figure 4-2; Black Clip in Place
3). Place bolt into hole, apply retaining washer, and tighten with Security Key.
Figure 4-3; Retaining WasherFigure 4-4; Security Key (Part Number 647-089-10)
TM
33
031-103-B0-003 Rev. C
Page 34
4. PN Series Options
4.2Battery Interface Unit (BIU)
The BIU is used in Powernode systems with multiple power supplies and/or multiple battery strings, and an AlphaGen DC
generator. The BIU provides a parallel DC bus with convenient connectors for each power supply and battery string.
(For installation and operation instructions, refer to the BIU Installation Manual, part number 018-311-C1.)
Upper battery shelf
Lower battery shelf (PN-3 enclosure)
Middle battery shelf (PN-4 enclosure)
Power Supply shelf
(optional mounting location for BIU)
BIU installed beneath
upper battery shelf
Figure 4-5; Battery Interface Unit in Place
4.3Service Disconnects
There are four Service Disconnects available (installed at the factory):
There are four basic configurations of the IPP. Each is available in 120V and 240V. Units in figures 4-10, 4-11, and 4-12
are factory pre-wired, include Square-D high-magnetic breakers for each power supply, and provide a GFCI convenience
outlet.
Figure 4-10; IPP for Three Power SuppliesFigure 4-11; IPP for Two Power Supplies
When using more than one power supply in the PN Series Enclosures, a cooling fan is required. The Cooling Fan kit includes
an intake filter, located inside the front door of the enclosure by the ventilation louvers. The filter must be cleaned
periodically as part of the power supply preventative maintenance program.
Replacement fuses and filters are available. Refer to section five for part numbers.
Connected to SPI
Figure 4-14; Cooling Fan Panel
Location of Fuse Holder
Figure 4-15; Panel is Installed in Top Rear of Enclosure
Connected to XM2
"Output 1"
031-103-B0-003 Rev. C
Figure 4-16; Cooling Fan Plugged into Power Supply and SPI
Alpha offers a line or precast, polymer concrete and reinforced concrete pads for the PN Series Enclosures. Polymer
concrete is significantly lighter and more stable when compared to reinforced concrete. Both materials represent a significant
savings in labor costs and quality improvement over "pour-in-place" pads. Other precast pad configurations are available.
Contact your nearest Alpha representative for additional information.