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Summary of Contents for Alpha Technologies GMX-915
- Page 1 Standby Power Supply Technical Manual GMX-915 Models Effective: March, 2006 Alpha Technologies...
- Page 2 Power Alpha Technologies ®...
- Page 3 NOTE: Operator is cautioned to 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. NOTE:...
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Page 4: Table Of Contents
Table of Contents Safety Notes .......................... 7 Introduction to the GMX Power Supply..............13 Terminal Block Overview ................14 Inverter Overview ................... 15 Optional Status Monitoring Modules .............. 16 Optional Features ..................17 Theory of Operation ....................18 AC (Line) Operation ..................18 Standby Operation .................. - Page 5 Table of Contents, continued GMX Power Supply Maintenance ................50 Check Battery Open Circuit Voltage .............. 50 System Information ..................50 Check Battery Voltage Under Load..............51 Check Battery Charger Voltage ..............52 Check Battery Terminals and Connecting Wires ..........52 Check Output Voltage ..................
- Page 6 List of Figures and Tables Fig. 1-1, GMX Power Supply ....................13 Fig. 1-2, GMX Terminal Block Overview ................14 Fig. 1-3, Inverter Overview ....................15 Fig. 2-1, Charger Modes...................... 19 Fig. 2-2, GMX Block Diagram ....................20 Fig. 3-1, AC Indicator ......................23 Fig.
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Page 7: Safety Notes
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 this product, contact Alpha Technologies or the nearest Alpha representative. Save this document for future reference. -
Page 8: Battery Safety Notes
Safety Precautions, continued • Do not allow live battery wires to contact the enclosure chassis. Shorting battery wires can result in a fi re or possible explosion. • Always replace batteries with those of an identical type and rating. Never install old or untested batteries. •... -
Page 9: Utility Power Connection Notes
Refrigeration) trip breaker must be used. Do not replace these breakers with a conventional service entrance breaker. Alpha recommends ONLY Square D breakers because of increased reliability in this powering application. High-magnetic Square D circuit breakers and BBX option (UL Listed service entrance) are available from Alpha Technologies. Description Alpha P/N Square D Part Number 240V Installation —... - Page 10 Utility Power Connection Notes ATTENTION: In most cases, the following confi gurations qualify for service entrance use when wiring a duplex receptacle to a service disconnect. Other codes may also apply. Always contact your local utility to verify that the wiring conforms to applicable codes.
- Page 11 Utility Power Connection Notes, continued 240VAC Service Entrance, GMX 225V, U.S. Domestic Models These confi gurations are equipped with a 240VAC duplex receptacle to provide power to the power supply and peripheral equipment. The receptacle, NEMA 6-15R, is protected by a single, 2-pole, common trip 15A circuit breaker located inside the service entrance.
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Page 12: Safety Ground
Grounding Connection Notes In order to provide a ready, reliable, source of backup power, it is necessary to establish a grounding system that provides for the safety of service personnel and for the proper operation and protection of equipment within the network. Safety Ground The safety ground is a two-part system. -
Page 13: Introduction To The Gmx Power Supply
1.0 Introduction to the GMX Power Supply The Alpha family of GMX Uninterruptible Power Supplies is designed for powering signal processing equipment in cable television and broadband LAN distribution systems. The GMX provides a critical load with current-limited, regulated, AC power that is free of spikes, surges, sags and noise. During AC line operation, AC power entering the power supply is converted into a quasi square wave and is regulated by a ferroresonant transformer at the required output voltage. -
Page 14: Terminal Block Overview
Introduction to the GMX Power Supply, continued Terminal Block Overview The GMX terminal block is located on the front left-hand side of the power supply. Below is a brief description of each terminal. Connections: • LRI (Local/Remote Indicator): The LRI lamp option is used in conjunction with the Automatic Performance Feature and connects to the LRI ±... -
Page 15: Inverter Overview
Introduction to the GMX Power Supply, continued Inverter Overview The inverter provides uninterrupted power to the ferroresonant transformer (via the batteries) during line failures. During line operation, the inverter charges the batteries using a three- stage (Bulk, Accept, and Float) charger. Components: •... -
Page 16: Optional Status Monitoring Modules
Introduction to the GMX Power Supply, continued Optional Status Monitoring Modules The GMX Power Supply supports a number of Alpha Technologies communications modules. The modules may be ordered factory-installed or as user-installed fi eld upgrades. CAUTION! Handle these modules with extreme care. Circuit boards and logic upgrades are static-sensitive and susceptible to damage. -
Page 17: Optional Features
Introduction to the GMX Power Supply, continued Optional Features The following options can be factory installed, or upgraded in the fi eld by the user: Local and Remote Indicator (LRI) The LRI (red) lamp is located on the outside of pole-mount enclosures. During normal AC line operation, the LRI remains off. -
Page 18: Theory Of Operation
2.0 Theory of Operation AC (Line) Operation During AC line operation, utility power is routed into the primary winding of the ferroresonant transformer through the contacts of the transfer isolation relay. At the same time, power is directed to the rectifi er circuitry in the inverter which provides power for the control circuitry. The bidirectional inverter also serves as a battery charger during AC line operation. -
Page 19: Charger Operation
Theory of Operation, continued Charger Operation The GMX Power Supply uses a three-stage, temperature-compensated battery charger. During AC line operation, the inverter winding on the ferroresonant transformer feeds the charger circuit which provides BULK, ACCEPT, and FLOAT charge voltages to the batteries. Charger Modes: BULK charge is a “Constant Current”... - Page 20 Theory of Operation, continued Winding Output Winding Input 017-932-B0-001, Rev. A...
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Page 21: Installation
Remote Temperature Sensor) and any other ordered options have been included. Carefully inspect the contents of the shipping container. If any items are damaged or missing, contact Alpha Technologies or the shipping company immediately. Most shipping companies have only a short claim period. -
Page 22: Installation Procedure
Installation, continued Installation Procedure The GMX Power Supply has been designed for shelf mounting within a variety of Alpha Enclosure Systems. 1. Before installing the power supply, inspect for damage, loose connectors, or other potential failures. Correct discrepancies before proceeding. 2. -
Page 23: Installing The Optional Ac Indicator Lamp
Installation, continued Installing the Optional AC Indicator Lamp NOTE: If the system confi guration includes an ACI option, install per the following instructions. The AC indicator (green lamp) is located on the outside of the enclosure. When the lamp is on, it indicates AC power is available at the power supply output. This enables service personnel to determine the status of the power supply without having to climb the pole. -
Page 24: Fig. 3-3, Aci Connection
Installation, continued Installing the optional AC Indicator Lamp, continued 5. Connect the shorter black/white set of wires to the black/white wires leading from the SPI. Connect the remaining longer set of wires to the V ± terminals on the front of the GMX Power Supply (see Fig. -
Page 25: Service Power Inserter (Spi)
Installation, continued Service Power Inserter (SPI) Coaxial Cable Connection Procedure: 1. Ensure the SPI is unplugged from the power supply prior to removing cover. 2. Remove the two screws holding the cover to the SPI’s chassis. 3. Remove the SPI cover, exposing the circuit board and seizure screw assembly. -
Page 26: Fig. 3-6, Cover Replaced, Spi Switched On
Installation, continued Enclosure Service Power Inserter (SPI), continued Wall 6. Replace the SPI cover and reinstall the screws. Paint-cutting 7. Verify the switch on the top of the SPI is in the Star Washers ON position. The switch in the ON position selects the GMX Power Supply as the power source to the cable plant. -
Page 27: Confi Guration
4.0 Confi guration Micro Board Setup The Micro Board comes factory set, but the Micro Board switches are accessible should a confi guration change be necessary. Setup details are included in this manual as an aid to troubleshooting, and as a reference to verify confi guration. Only qualifi ed technicians should perform reconfi... -
Page 28: Ac Output Voltage Reconfi Guration
Confi guration, continued AC Output Voltage Reconfi guration Tools Required: Small fl at-blade torque screwdriver The output voltage on GMX Power Supplies can be easily reconfi gured by moving the Output Tap jumper to 87 or 63VAC. ATTENTION: Output voltage reconfi guration must only be performed by qualifi ed personnel. WARNING! Before proceeding, make certain all power has been removed from the power supply by unplugging the power supply from the AC power source, front panel connections, and... -
Page 29: Operation
5.0 Operation Start-up and Test AC Line Operation 1. Before making any power supply connections, verify the correct voltage, polarity, and frequency are available from both the AC utility power source and the DC battery system. 2. Verify the AC circuit breaker (located on customer supplied service disconnect) and the battery breaker on the GMX Power Supply are off. - Page 30 Operation, continued Start-up and Test, continued AC Line Operation, continued 6. Use the Smart Display or a true RMS voltmeter to verify AC output (±5%) at the module’s AC Output test point. If a non-RMS voltmeter is used, the output reading can vary by as much as 10% due to the “quasi”...
- Page 31 Operation, continued Start-up and Test, continued Standby Operation 1. Perform the following procedure after successful completion of a self-test with the GMX Power Supply operating normally in AC line mode: Momentarily fail the AC utility input power by switching the AC circuit breaker (service disconnect) to OFF. 2.
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Page 32: Smart Display
Operation, continued Smart Display All operational functions, system testing, setup menus, and alarms are available via the illuminated display panel on the front of the GMX Power Supply. Display functions are accessible by pressing any of the four keys: ESCAPE, UP, DOWN, and ENTER. Descriptions of key functions are as follows: ESCAPE: ESCAPE offers the following features:... -
Page 33: Fig. 5-2, Smart Display
Operation, continued Smart Display, continued Display Backlighting The display will normally be unlit. Press any key once to activate backlighting. This will illuminate the display without deactivating Auto Scroll. Auto Scroll The display will normally be in the Auto Scroll mode, continually cycling through the sub- menu items at a two-second interval. -
Page 34: Operation Normal
Operation, continued Smart Display, continued 5.2.1 Operation Normal If no alarms are present, the GMX Power Supply operates in the Operation Normal mode. This mode allows the operator to view the primary operating parameters of the power supply. In this mode, the display will auto scroll through the available menu items at two-second intervals. -
Page 35: Additional Information Display
Operation, continued Smart Display, continued 5.2.2 Additional Information Display Press ENTER to activate the Additional Information display, which is an extension of the Normal Operation mode and displays information of secondary importance to the operator. When the Additional Information display is fi rst accessed, information is displayed in the Auto Scroll mode. -
Page 36: Setup Menu
Operation, continued Smart Display, continued 5.2.3 Setup Menu The Setup Menu is one level below the Additional Information display and is reached by pressing ENTER. Use this menu to view and change the programmable operating parameters of the power supply. Navigation is similar to the Normal Operation menu. Pressing UP or DOWN accesses the Single Step mode, where sub-menu items can be individually selected. - Page 37 Operation, continued Smart Display, continued 5.2.3 Setup Menu, continued The Setup Menu contains the following items: Top Line (provides additional information) • SET UP MENU • TO MANUAL SCROLL • <ESC> TO ADD’L INFO Second Line (cycles through the following parameters): Default Minimum Maximum...
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Page 38: Fig. 5-5, Setup Menu Display
Operation, continued Smart Display, continued 5.2.3 Setup Menu, continued SETUP MENU FLOAT V/C 2.27 ACCEPT V/C 2.40 TEMP COMP BATT CAPACITY 100Ah SELF-TEST TEST INHIBIT — TEST INTERVAL 30 D TEST COUNTDOWN TEST DURATION 10 M FREQ RANGE 3.0HZ STANDBY TIME 65 M STANDBY EVENTS SET DEFAULTS... -
Page 39: Alarm Indications
Operation, continued Smart Display, continued 5.2.4 Alarm Indications In the event of a failure, the Active Alarm display indicates detected alarms and items to check to correct the alarm condition. Major alarms also cause the red LED to fl ash. Press either UP or DOWN to stop Auto Scroll. -
Page 40: Table 5-2, Major Alarms
Operation, continued Smart Display, continued 5.2.4 Alarm Indications, continued Major Alarms Active Alarm Corrective Action Probable Cause Self-test FAIL* 1. Check batteries • 36V battery string below 33.3VDC 2. Check inverter • Inverter failure • Batteries will not sustain load LOW BATT VOLTS 1. -
Page 41: Control Panel Leds
Operation, continued Smart Display, continued 5.2.5 Control Panel LEDs Two front panel LEDs indicate the condition and status of the GMX Power Supply. The green Output LED, when illuminated, indicates the power supply is functioning normally and supplying output AC to the load. A fl ashing output LED indicates that a minor alarm has been detected. -
Page 42: Detailed Menu Structure And Navigation
Smart Display, continued 5.2.6 Detailed Menu Structure and Navigation OPERATION NORMAL To Self-test (Auto-scroll Information) Back to Operation Normal Input Voltage 240V Battery Volts 40.5V To Additional Information Testing: 10 MIN Output Voltage 90V Battery Volts 37.3V Output Current 12.2A Back to Operation Normal 12 Events 65 M Charger Mode = Float... - Page 43 Smart Display, continued 5.2.6 Detailed Menu Structure and Navigation, continued To Single Step ACTIVE ALARMS ACTIVE ALARMS ***ACTIVE ALARMS*** (Auto-scrolling Information) (Single Step Information) (Auto-scrolling Information) Input Voltage 240V Self-test Fail Input Voltage 240V To System Info Battery Volts 40.5V Low Batt Volts Battery Volts 40.5V Output Voltage 90V...
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Page 44: Smart Display Glossary
Operation, continued Smart Display Glossary Battery Capacity: The capacity of the battery strings attached to this GMX Power Supply. When batteries are not attached, the setting may be programmed to “0.” This disables standby operations, including test mode, and disables the No Batteries Alarm. If batteries are attached, then this setting should be programmed to the total rating of all battery strings. - Page 45 5. 0 Operation, continued Smart Display Glossary, continued NOTE: Resetting factory defaults does not clear Standby Events or Standby Time. Standby Time: The total amount of time the GMX Power Supply has operated in standby mode. This does not include self-test time and thus represents the sum total number of minutes of AC line failure since the last time this counter was reset.
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Page 46: Automatic Performance Test
5. 0 Operation, continued Automatic Performance Test Automatic Self-test: The GMX Power Supply can periodically perform an automatic self-test to verify the state of the batteries and the inverter circuitry. The automatic test feature has several programmable parameters that affect the frequency and duration of automatic tests. In addition to automatic testing, you can manually put the GMX Power Supply into test mode by pressing ENTER and DOWN simultaneously. -
Page 47: Providing Power Via External Source
Operation, continued Providing Power via External Source In the event of an extended utility failure, an external AC or DC power source can provide backup power to the system. The backup power source allows the power supply to continue charging the batteries, and ensures uninterrupted service to the network. Follow the procedures outlined in the documentation and/or connection procedures listed below. -
Page 48: Using A Truck-Mounted Inverter Or Generator
5. 0 Operation, continued Providing Power via External Source, continued 5.5.2 AC Powering, continued 5. Start and operate the generator according to the generator operation manual. 6. If the generator kilowatt rating is twice the kilowatts used by the power supply indicated on the Smart Display, leave the battery breaker on and the generator will charge the batteries. -
Page 49: Resumption Of Utility Power
Operation, continued Resumption of Utility Power WARNING! Use caution when disconnecting a generator and reconnecting to utility power. Dangerous voltages are present. CAUTION! Care must be exercised to ensure that both powering systems are not connected at the same time, or damage to the power supply and/or the generator may result. -
Page 50: Gmx Power Supply Maintenance
Use heavy gloves when handling a GMX Power Supply that has just been taken out of service. The ferroresonant transformer generates heat that may cause burns if handled with bare hands. • Alpha Technologies is not responsible for battery damage due to improper charger voltage settings. Consult the battery manufacturer for correct charger voltage requirements. •... -
Page 51: Check Battery Voltage Under Load
GMX Power Supply Maintenance, continued Check Battery Voltage Under Load In order to completely verify a battery’s ability to supply load, the battery must be tested while under a load. This is the most accurate method to determine the condition of the batteries. If available, use a battery load tester and follow the manufacturer’s instructions to test the individual batteries. -
Page 52: Check Battery Charger Voltage
GMX Power Supply Maintenance, continued Check Battery Charger Voltage The advanced three-stage charging features of the GMX Power Supply are completely self- monitoring. During normal power supply operations, the power supply continuously verifi es the operating condition of the battery charger. If, for any reason, the battery charger fails, a Charger Fail alarm displays on the Smart Display. -
Page 53: Replacing The Metal Oxide Varistors
GMX Power Supply Maintenance, continued Replacing the Metal Oxide Varistors The Power Distribution Board (PDB) uses three Metal Oxide Varistors (MOVs) for lightening suppresson. If the MOVs fail, Alpha offers a replacement board option to bring the unit back into service. Tools Required: #2 Phillips screwdriver Wire cutters... -
Page 54: Maintenance Log
GMX Power Supply Maintenance, continued Maintenance Log BATTERY MAINTENANCE Battery Number Battery Manufacture Date code/Lot number Terminal check Voltage (Unloaded) Voltage (Loaded) GMX MAINTENANCE Model Number Serial Number NORMAL OPERATION Input Voltage Output Voltage Output Current Battery Voltage Standby Events Standby Time Charger Mode Operation Mode... -
Page 55: Specifi Cations
7.0 Specifi cations The following tables show the electrical, mechanical, and physical specifi cations for the GMX Power Supply models. Electrical Input 915 Models 115V ± 10% (nominal) Input Voltage 225V ± 10% (nominal Standby Transfer ± 30% (nominal) 60Hz ± 3% Input Frequency 50Hz ±... -
Page 56: Safety And Emc Compliance
Specifi cations, continued Safety and EMC Compliance North American Product Compliance: Safety (NRTL/C): UL1778 and CSA C22.2 No.107.1-M95 Electromagnetic Compatibility (EMC): FCC Part 15, sub-part B, Class A European Union Product Compliance: Safety (CE): Low Voltage Directive: 72/23/EEC, 93/68/EEC Technical Standards: EN 50091-1:1993, EN 60950:1992 Electromagnetic Compatibility (EMC): EMC Directive:... -
Page 57: Troubleshooting
Return/Repair Information In the event the Power Supply must be returned to Alpha Technologies for service, a Return Material Authorization (RMA) form must accompany the unit. The form can be found at Alpha’s Web site (www.alpha.com/support). -
Page 58: Emergency Shutdown
Troubleshooting, continued Emergency Shutdown The GMX Power Supply contains more than one live circuit. During an emergency, utility power may be disconnected at the service entrance or main electrical panel to protect emergency personnel. Power may still present at the output. To prevent the possibility of injury to service or emergency personnel, always follow this procedure to safely shutdown the power supply. - Page 59 Fax: +33 1 41 90 93 12 Due to continuing product improvements, Alpha reserves the right to change specifi cations without notice. Copyright © 2006 Alpha Technologies, Inc. All rights reserved. Alpha is a registered trademark of Alpha Technologies. 017-932-B0-001, Rev. A...
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