Alpha Lectro 60V User manual

Alpha Technologies
®
Broadband Ferro Power Supply
User’s Guide
60V/87V Model
Effective: June, 2003

Power
Alpha Technologies. Protecting The Power in Communications.

164201139 D0 3
Contacting 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)
Broadband Ferro Power Supply
User’s Guide
60 / 87 Vac Output
164201139 Rev. D0 — © 2003 Alpha Technologies
Photographs contained in this manual are for illustrative purposes only. These
photographs may not exactly match your installation.
Review the drawings and illustrations contained in this manual before
proceeding. If there are questions regarding the safe operation of this powering
system, please contact Alpha Technologies or your nearest Alpha representative.
Alpha denies responsibility for any damage or injury involving its enclosures, power
supplies, generators, batteries, or other hardware when used for an unintended
purpose, installed or operated in an unapproved manner, or improperly maintained.
WARRANTY NOTICE
Alpha Technologies, Inc., provides a LIMITED WARRANTY covering the
performance of all Alpha’s CATV and Broadband products. The terms and
conditions of the LIMITED WARRANTY STATEMENT are contained in a separate
written LIMITED WARRANTY STATEMENT. If there are any warranty claims, the
purchaser (or purchaser’s representative) must follow the LIMITED WARRANTY
guidelines, described in the applicable LIMITED WARRANTY STATEMENT.
NOTE
NOTE
NOTE

4164201139 D0
Table of Contents
Warnings & Cautions............................................................................. 5
1. Introduction......................................................................................... 6
2. Specifications ..................................................................................... 7
3. Installation .......................................................................................... 8
3.1 Pole Mount Installation Procedure .................................................................................................. 8
3.2 Ground Mount Installation Procedure ............................................................................................10
3.3 Electrical Connections ..................................................................................................................12
4. Operation .......................................................................................... 14
4.1 Initial Startup ................................................................................................................................14
4.2 Operation ...................................................................................................................................... 14
4.3 Changing the Output Voltage ......................................................................................................... 14
5. Maintenance ..................................................................................... 15
List of Figures
Fig. 3-1 Pole Mount Arrangement ...................................................................................................... 9
Fig. 3-2 Ground Mount Arrangement ................................................................................................. 11
Fig. 3-3 Holding the Cover Open .......................................................................................................12
Fig. 3-4 Knockout and Receptacle ....................................................................................................12
Fig. 3-5 Output Voltage Conversion ..................................................................................................14
Broadband Ferro Power Supply
User’s Guide

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A “Warning” identifies conditions and actions that pose a hazard to the user.
This power supply and its associated hardware (enclosure, cabling) may contain equipment(s), or
parts which have accessible hazardous voltage or currents.
To avoid injury :
• This power supply and its associated hardware must be serviced by authorized personnel only.
• Verify AC line power is de-energized prior to installation or service.
• Remove all conductive jewelry or personal equipment prior to servicing equipment, parts, connectors,
wiring, or batteries.
• Read and follow all installation, equipment grounding, usage, and service instructions included in this
manual.
Enclosure, equipment or parts may be damaged or cause damage if used or installed improperly.
To avoid damage :
• A UL-listed or equivalent service disconnect switch must be provided by the installer. It shall be
connected between the utility power source and the power supply. Subject to local codes, the service
disconnect switch shall be an outdoor, NEMA 3R enclosure, rated 120/240V, with a noninterrupted
termination. The disconnect shall be a circuit breaker type provided with a 20A (10A for 230Vac, 50Hz
units), high-magnetic circuit breaker in the line lead only.
• Overcurrent protection and disconnecting means for the AC output are to be supplied by the installer as
required by local codes.
• Use #16AWG minimum Copper, 75C, for all utility input wiring.
• Prior to installation, verify that the output voltage from the enclosure or its equipment match the voltage
requirements of the connected equipment (load).
• Verify the enclosure which houses the power supply has sufficient ventilation to maintain the power
supply in its specified operating temperature range (-40°C to +55°C).
• Do not operate the the power supply in an environment containing corrosive or conductive gas, vapor,
liquid, or dust.
• When servicing the power supply, use only specified replacement parts.
• Servicing is to be performed only by authorized personnel.
WARNINGS & CAUTIONS
A “Caution” identifies conditions and actions that may damage the power supply or
associated equipment.
WARNINGS
NOTE
CAUTIONS
NOTE

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1. Introduction
The Lectro Broadband Ferro Power Supply brings the CATV industry a new performance
standard. Its unique input/output system simplifies the installation and replacement of
optional equipment such as arrestors or time delays. Easy conversion from 60 to 87V
operation also allows simple network upgrades.
Lectro’s proprietary transformer design provides excellent regulation over varying AC input
and load conditions, providing the user with the most efficient and trouble-free ferroresonant
system on the market. Careful physical and thermal design ensure a longer transformer life,
while allowing chassis replacement with minimum tools and effort.
This manual provided information related to the installation, operation, and service of
specific Lectro equipment. For assistance in personnel training or specific problems or
questions relating to applications, please call 1-800-863-3930 and ask for customer service,
or 1-800 863-3364 and ask for Technical Support. The information in this manual is
restricted to customers of Alpha Technologies, and use by unauthorized persons is strictly
prohibited.
Prior knowledge of good CATV system construction practice and a working knowledge of
electrical safety practices are minimum qualifications for installation and operation.
However, for servicing, the technician should be well versed in basic electronics.
It is recommended that you carefully read this manual prior to leaving your office to perform
any work on the Lectro Broadband Ferro Power Supply.
WARNING
Do not install damaged equipment.
Carefully inspect each package for evidence of damage during transit. If items are damaged,
report any damage to the shipping company and the local Alpha sales or service office
immediately.
After inspection by the shipping company and a written appraisal of the damage has been
received, inform Alpha Technologies that you intend to return the merchandise and request
a return authorization number. Return the items promptly with the return authorization and
invoice number clearly shown on the shipping label.
Alpha Technologies will either repair or replace the equipment, depending upon the extent
of the damage.

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2. Specifications
Unit
Mechanical Specifications
Height Width Depth Weight
Pole Mount 381mm (15") 235mm (9.25") 213mm (8.4") 25.4kg (56lb)
Ground Mount 559mm (22") 235mm (9.25") 213mm (8.4") 26.3kg (38lb)
Technical Specifications
Model Input
Line Voltage
Input
Freq. (± 3%)
Input
Current (max.)
Output
Voltage (± 3%)
Output
Current
Output
Power

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3. Installation
3.1 Pole Mount Installation Procedure
This section contains instructions for pole and ground mount, including electrical
connections.
A bucket truck or other suitable equipment such as spikes and safety harnesses, should be
used during installation or service of pole-mounted cabinets. To mount the Broadband Ferro
power supply to a utility pole, perform the following steps:
NOTE
Pole mounting the cabinet should be done in accordance with the local agreement
between the cable operator and the utility company.
1. Install an agency approved service disconnect switch with overcurrent protection
between the AC power source and the cabinet mounting point. Wire to power line in
accordance with local codes.
NOTE
The disconnect box should have a high-magnetic type circuit breaker, capble of
passing short duration inrush currents, and have a 15A minimum rating.
2. Remove the U-shaped mounting bracket from the cabinet rear panel.
3. Use the bracket as a template to mark mounting holes at the desired mounting
location.
4. Drill 11/16" holes in the pole at the marked locations.
5. Attach the mounting bracket to the pole using two 5/8”, customer-supplied bolts.
Tighten securely.
6. Raise the cabinet and set into place on the bracket. Attach the cabinet using the
hardware removed in Step 2. Tighten the bolts securely.
7. Confirm availability of a suitable ground rod next to the powerpole. If required, drive a
rod according to local codes.
8. Continue to “Electrical Connections”.

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3. Installation
3.1 Pole Mount Installation Procedure, continued
Fig. 3-1 Pole Mount Arrangement

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3. Installation
Although ground mounting the power supply can be accomplished by several methods, the
following procedure is recommended.
1. Select an appropriate site. Remove turf and level an area of approximately 24" x 24".
2. In accordance with local codes, install the disconnect box near the AC power source.
NOTE
The disconnect box should have a high-magnetic type circuit breaker, capable of
passing short duration inrush currents, and have a 20A minimum rating (10A for
230Vac, 50Hz units).
3. From the disconnect, install conduit to the power supply site and turn a stub up to
extend above ground level. Drive a suitable ground rod according to local codes.
4. Install appropriate size conduit for the coax cable for output connections.
5. Use 1" x 4" stock lumber to construct a form measuring 6" longer in length and width
than the skirt supplied. Anchor the form securely to the ground.
6. Attach the supplied angle brackets to the ground skirt using the hardware provided.
7. Make a template from sheet metal or plywood indicating the position of the angle
bracket mounting holes and outlining the outside of the ground skirt.
8. Drill out the two holes in the template and insert two customer-supplied 5/8" x 4"
bolts. The head of the bolts will be embedded into the concrete pad when installation
is complete. Leave sufficient thread above the pad for securing the ground skirt.
9. Use approximately one cubic foot of concrete to pour a pad 3" thick. Pour, level, and
finish the concrete to the bottom of the template. Allow to cure for 24 hours.
10.Attach the ground skirt to power supply cabinet. Align skirt inside the bottom lip of the
cabinet and secure with the 10-32 x 3/8" screws from the parts kit.
3.2 Ground Mount Installation Procedure

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3. Installation
3.2 Ground Mount Installation Procedure, continued
Fig. 3-2 Ground Mount Arrangement

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3. Installation
To connect the wiring, perform the following steps:
WARNING
Verify the utility disconnect is off and that no conductors are energized before
proceeding.
1. Open the housing cover and place a screwdriver blade in the small notch at the top of
the housing to hold the cover in place.
2. Remove the duplex power receptacle and one utility entry knockout (there are two
knockouts; remove the one that best suits your application).
3. Install your choice of output cable into the adapter.
4. Connect the yellow output wire to the coax cable center conductor by sliding the
seizure clamp into place and tightening securely.
3.3 Electrical Connections
Fig. 3-3 Holding the Cover Open
Fig. 3-4 Knockout and Receptacle

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3. Installation
5. Install a weatherproof conduit fitting in the utility knockout and pull the AC primary
wiring into the cabinet.
6. Connect the AC high input (black) to the copper receptacle terminal, the AC neutral
input (white) to the silver receptacle, and the utility protective ground (green) to the
green receptacle terminal.
7. Position all wiring neatly in the receptacle box and install the receptacle and cover.
8. Plug the power cord into the receptacle box.
9. Close the cabinet cover and lock it with the single screw at the bottom.
10. Connect an unbroken 6 AWG soft-drawn copper ground wire between the lug
provided on the back of the cabinet and a ground rod for lightning protection.
NOTE
If local codes require bonding to utility ground, a separate ground rod and vertical
should be provided, then the two verticals should be bonded at the bottom of the
pole.
11. If this is a ground mount installation, attach and secure the ground skirt front with the
screws provided.
3.3 Electrical Connections, continued

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4. Operation
4.1 Initial Start Up
1. Turn the utility disconnect on, and power will be applied to the cable at this time.
2. If desired, use a true RMS meter to record AC output voltage at the cable output
conductor (yellow wire) and the cable ground.
4.2 Operation
The Lectro Broadband Ferro Power Supply is designed to provide regulated 60V, or 87V
output from the 120Vac power line (230Vac for 50Hz units). The power supply basically
consists of a transformer and a capacitor which explains its inherent high reliability.
Utility power enters the unit through the duplex power receptacle and is then routed
through the input plug to the transformer primary circuit. This configuration allows for
operation from an auxiliary power source (in the event of primary power failure) and
ensures the utility is disconnected from the circuit while the auxiliary power is applied.
4.3 Changing the output Voltage
The power output is normally configured for 60V and can be changed to provide 87V
output by performing the following procedure:
1. Unlock and open the cabinet.
2. Move the output jumper connector from the 60V position to the 87V position as
shown on the interior label (see Figure below).
3. Close and relock the cabinet.
Fig. 3-5 Output Voltage Connectors

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5. Maintenance
Proper operation and longer system life can be ensured by performing the following
maintenance:
1. Before opening the cabinet, inspect it for external damage or tampering, including
the grounding circuit.
2. Unlock and open the cabinet.
3. Inspect the air vents for obstructions.
4. Inspect the connectors and cable for damage or corrosion.
5. Close and relock the cabinet.
CAUTION
NOTE
Lethal voltages are present underneath the chassis when the unit is in
operation. For safety, be certain to unplug the input cord and the output cable before
attempting service.
Part of the unit’s thermal design is heat conduction from the transformer brackets to
the cabinet of the power supply. A thin coating of silicone grease is applied to the
bracket contact area during manufacture. Be sure to apply a fresh coat of silicone
grease and tighten all four retaining nuts securely during reassembly.

Due to continuing product improvements, Alpha reserves the right to change specifications without notice.
Copyright © 2003 Alpha Technologies, Inc. All rights reserved. Alpha is a registered trademark of Alpha Technologies. 164201139 Rev D0.
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