Related Manuals for Alpha Technologies CFR 600
Summary of Contents for Alpha Technologies CFR 600
- Page 1 Operator’s Manual Alpha CFR 600, CFR 600XT and CFR 1000 U N I N T E R R U P T I B L E P O W E R S U P P L I E S F R O M...
- Page 2 Operator’s Manual Alpha CFR 600, CFR 600XT and CFR 1000 U N I N T E R R U P T I B L E P O W E R S U P P L I E S ©1995 Alpha Technologies...
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Page 3: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS CONTAINED IN THIS MANUAL CAUTION RISK OF ELECTRICAL SHOCK CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, AND TO ENSURE THE SAFE OPERATION OF THIS UNIT, THE FOLLOWING SYMBOLS HAVE BEEN PLACED THROUGHOUT THE MANUAL. WHERE THESE SYMBOLS APPEAR, SERVICING SHOULD BE PER- FORMED ONLY BY QUALIFIED PERSONNEL. -
Page 4: The Alpha Cfr
CAREFULLY UNPACK THE CFR. REPORT ANY SHIPPING DAMAGE IMMEDI- ATELY. PLEASE READ THE OPERATORS MANUAL. IF YOU HAVE QUESTIONS REGARD- ING THE SAFE INSTALLATION OF THE CFR, CONTACT ALPHA TECHNOLOGIES. RETURN THE ENCLOSED WARRANTY CARD. THIS WILL ALLOW US TO SERVE YOU BETTER. -
Page 5: Table Of Contents
The Alpha CFR Table of Contents THE ALPHA CFR 600 and CFR 1000 UNINTERRUPTIBLE POWER SUPPLY INTRODUCTION 1.1 The Alpha CFR 1.2 The CFR Advantage 1.3 Unpacking and Inspection FEATURES 2.1 A Tour of the CFR 2.2 CFR Front Panel 2.3 CFR Rear Panel... - Page 6 The Alpha CFR Table of Contents, continued OPERATION, continued 4.2 Using the Standard Interface Device UPS Powering Up Output Shutdown Pending Output Shutdown in Progress Line Present Operation Line Failure (AC Input Out of Tolerance) Line Failure Operation Line Synchronization Low Battery Warning Low Battery Shutdown Test...
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Page 7: Introduction
With distribution networks and service centers located throughout the world, Alpha Technologies is here to back you up. From your date of purchase, Alpha provides complete technical support and prompt, reliable service to ensure that your CFR-UPS provides you with a lifetime of reliable operation. -
Page 8: The Cfr Advantage
1. INTRODUCTION 1.2 The CFR Advantage ADVANCED POWER PROTECTION TECHNOLOGY Power protection devices can be judged by the type and quality of power they provide. Alpha CFR Uninterruptible Power Supplies provide continuous, conditioned “computer-grade” AC power to electronic equipment such as Computer Systems, Point of Sale Terminals, Process Controls, Telecommunications, CATV Headend, Broadband LAN, Manufacturing Control Systems, Critical Care and Hospital Lab Equipment. - Page 9 CSA and VDE, the Alpha CFR UPS is one of the safest, most reliable and versatile uninterruptible power supplies available. Our commitment to safety and quality engineering has not only established industry-wide safety standards, but has earned Alpha Technologies international recognition as a leader in power protection equipment.
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Page 10: Unpacking And Inspection
UPS, contact Alpha Technologies. COMPLETE THE FOLLOWING FOR YOUR RECORDS: Model # Serial # Options Purchase date THIS UNIT WAS PURCHASED FROM: Dealer name City State/Province Zip/Postal Code Country Telephone # RETURN THE ENCLOSED WARRANTY CARD TO ALPHA TECHNOLOGIES... -
Page 11: Features
2. FEATURES 2.1 A Tour of the CFR The Alpha CFR is designed to be easy to use and extremely flexible. The CFR’s interchangeable front panel interface devices provide you with a wide range of information management options. The rear panel accepts a variety of connectors and receptacle plates to facilitate your most demanding communication and powering needs. -
Page 12: Cfr Rear Panel
2. FEATURES 2.3 CFR Rear Panel AC INPUT Connector The UPS is equipped with a standard, grounded AC power cord. EXTERNAL BATTERY Connector The connector accepts a standard plug from the EBP Series Battery Pack. Extending backup time is as simple as plugging in the battery pack. BATTERY Circuit Breaker The battery breaker protects the DC circuit. - Page 13 2. FEATURES 2.3 CFR Rear Panel Exhaust Fan The UPS contains a rear panel exhaust fan to ensure maximum cooling protection during all modes of operation. OUTPUT Receptacle Plate The load (equipment to be protected) connects to the rear panel output receptacles.
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Page 14: Information Management Options
2. FEATURES 2.4 Information Management Options Standard Interface Device The Standard Interface Device provides you with vital UPS operating parameters from front panel LED's (see section 4.2). The Standard Interface also has a load indicator to help you determine precise loading on your UPS, plus Manual Start and Alarm Off switches. -
Page 15: Intelligent Interface Device
The modem option may also be used to page service personnel on critical alarm conditions. NOTE: The CFR 600 and CFR 1000 do not support the modem option with internal I For further information on operation and installation of the I D, please refer to its operator’s manual “Information Management Using the Intelligent... -
Page 16: Communication / Interface Options
For a full description of the features and capabilities of AlphaNet C shutdown software, refer to its user’s manual or contact Alpha Technologies. AlphaNet C is available for all major network platforms and operating systems — Novell Netware, SCO Unix, IBM OS/2, IBM AIX, Sun Solaris, Hewlett-Packard HP-UX (DAT), and Digital Equipment (OS/F, VMS, and DECNET). -
Page 17: Rear Panel Connectors
2. FEATURES 2.5 Communication / Interface Options, continued Rear Panel Connectors: Below are the various communication connectors as they appear on the back of the CFR-UPS. The photographs show the pin numbering for the different connector types. RS-232 Serial Connector LAN Interface Connector External I D Connector... -
Page 18: Rs-232 Connector
2. FEATURES 2.5 Communication / Interface Options RS-232 Connector: The connection/specifications for the RS-232 serial port vary depending on the installed interface device (i.e., SID or I D option). RS-232 connections for the standard CFR-UPS (with SID display or internal I The standard CFR-UPS configuration with SID or internal I connects to a computer or terminal using a standard straight-through RS- 232 cable. -
Page 19: Lan Interface Connector
Basic UPS monitoring software is provided as part of many operating systems and can also be purchased from third party vendors. Alpha Technologies “AlphaNet C shutdown software” can also operate in the basic mode to shutdown the CFR before its battery reserve is exhausted. -
Page 20: External I 2 D Connector
2. FEATURES 2.5 Communication / Interface Options External I D Connector The external I D connector provides an interface for the optional desktop Intelligent Interface Device (I D). This allows the CFR to be remotely monitored and controlled from up to 2,000 feet away. The port uses a proprietary RS-485 protocol and has the following pin out: Pin out: (MMJ connector, offset key) 1: +12V DC (unreg) - Page 21 2. FEATURES 2.5 Communication / Interface Options, continued External Alarms Connector, continued Pin out: (RJ-45 connector, centered key) Pin 1 Line Present Pin out: (RJ-45 connector, Female) Line Failure N.C. LINE FAIL, COM contact LINE FAIL, N. C. contact LINE FAIL, N. O. contact LOW BATTERY, N.
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Page 22: Installation
208 VAC, it will cause the UPS to run continuously off of battery power. This would discharge the UPS batteries and cause the output load to fail. Alpha Technologies recommends using a generator equipped with an electronic speed and voltage control. If a generator equipped with a mechani- cal governor "speed control"... -
Page 23: Connecting The Cfr
3. INSTALLATION 3.2 Connecting the CFR 1. Connect the CFR's AC power cord to the wall receptacle. 2. If using an external battery pack, plug its connector into the rear panel of the UPS (see section 3.3). 3. Start and test the UPS without the load connected (see section 4.1). After testing, switch the unit OFF before connecting the load. -
Page 24: External Battery Pack
Requires Phillips Screwdriver BATTERY Circuit Breaker Phillips Screw # 2 Phillips Screw #1 External Battery Connector Note: Battery Pack can be installed along side, or underneath the CFR UPS. Figure 7 CFR 600 and EBP External Battery Pack... -
Page 25: Operation
4. OPERATION 4.1 Start-up and Test 1. Plug the CFR’s AC line cord into a wall receptacle. The TEST LED and OUTPUT LOAD display LEDs will flash for a few seconds to indicate the CFR is powering up. The LINE PRESENT LED will then come ON to indicate the AC input line is OK and the CFR is running on AC line power. -
Page 26: Switching Off The Ups
4. OPERATION 4.1 Start-up and Test, continued Switching OFF the UPS: 1. Switch all equipment connected to the UPS OFF. 2. Switch the rear panel “BATTERY” circuit breaker OFF. This will prevent the UPS from initiating LINE FAILURE operation when AC power is removed. -
Page 27: Using The Standard Interface Device
4. OPERATION 4.2 Using the Standard Interface Device The Standard Interface Device displays vital UPS operating parameters and has the ability to self-test the UPS at the touch of a button. When used in conjunction with the CFR's rear-panel “Form-C” contact closures, UPS status information can be sent directly to a Local Area Network (see section 2.5). -
Page 28: Using The Standard Interface Device
4. OPERATION 4.2 Using the Standard Interface Device UPS Powering Up Whenever the CFR is powering up, the TEST LED flashes for a few seconds. At the same time the OUTPUT LOAD indicator LEDs flash in a chasing pattern to indicate that there is no output. As soon as the power up sequence is completed, the TEST LED switches OFF and the OUTPUT LOAD display LEDs show the percentage of the load. -
Page 29: Line Present Operation
4. OPERATION 4.2 Using the Standard Interface Device Line Present Operation The green “LINE PRESENT” LED indicates that the UPS is running on AC line (utility / mains) power. Line Failure (AC Input Out of Tolerance) Whenever AC line voltage becomes unacceptably high or low (+10 % / -25%), or the line frequency exceeds + 3%, the "LINE PRESENT"... -
Page 30: Low Battery Warning
4. OPERATION 4.2 Using the Standard Interface Device, continued Low Battery Warning The red “LOW BATTERY WARNING” LED precedes “LOW BATTERY SHUTDOWN” by 2 to 5 minutes and indicates that the batteries can no longer support the load. Immediate steps should be taken to begin an orderly system shutdown. -
Page 31: Alarm Off Switch
4. OPERATION 4.2 Using the Standard Interface Device, continued Alarm Off Switch The switch cancels the audible LOW BATTERY WARNING alarm. The alarm remains disabled until line power is restored and the batteries are recharged. ALARM OFF Switch Manual Start / (Hold to Test) Switch The switch is used to start the UPS from battery power whenever AC line power is not available (“LINE PRESENT”... -
Page 32: Rs-232 Terminal Communications
INPUT LINE shows the current status of the AC line which may be PRESENT; FAILURE; or TEST MODE. The ALARMS message lists all current alarms. For a complete description of alarms refer to section 5.12. Alpha Technologies - CFR CFR-UPS Micro Micro Serial#00000000 Serial No. -
Page 33: Rs-232 Menu Selection Icons
5. RS-232 TERMINAL COMMUNICATION 5.2 RS-232 Menu Selection Icons Icons have been placed throughout this section to easily guide you to key commands using remote terminal emulation. The icons provide short cuts to desired display screens without having to step through various menus. -
Page 34: Remote Terminal Quick Reference
5. RS-232 TERMINAL COMMUNICATION 5.3 Remote Terminal Quick Reference The menu items outlined in this manual can be accessed from a remote terminal. The numbers contained in this guide act as a quick reference to accessing menu functions. Single-digit numbers relate to specific main menus. -
Page 35: Menu Commands Overview
5. RS-232 TERMINAL COMMUNICATION 5.4 Menu Commands Overview Overview: The following section provide a general overview of the menu structure and give some examples of how to perform certain command functions such as testing the UPS. Querying CFR Status and Measured Parameters The current status (mode of operation) of the CFR and all active alarms are displayed at the end of the opening menu (see section 5.12 for a list of status messages and alarm events). - Page 36 5. RS-232 TERMINAL COMMUNICATION 5.4 Menu Commands Overview, continued Calibrating the CFR The CFR-UPS may be calibrated using two sets of parameters - Maintenance Parameters (commands “70” to “79”) and Service Parameters (commands “80” to “89”). Maintenance parameters allow you to customize the CFR detection and warning levels.
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Page 37: System Parameters
5. RS-232 TERMINAL COMMUNICATION 5.5 System Parameters The “SYSTEM PARAMETERS” screen provides UPS battery tempera- ture information and manual initiation and termination of SELF TEST. Battery Temperature Displayed in degrees C, Ambient Temperature is measured inside the UPS in the vicinity of the battery compartment. Start Test Self Test can be initiated by selecting this menu. -
Page 38: Input Parameters
5. RS-232 TERMINAL COMMUNICATION 5.6 Input Parameters “INPUT PARAMETERS” provides UPS Input Voltage, Current, Volt Amps, Power in Watts, Power Factor, and Line Frequency information. Voltage The voltage measured at the input of the UPS (i.e., 120 VAC). Current The flow of current measured at the input of the UPS (i.e., 3.1 Amps). Volt Amps The apparent input power of the UPS calculated by multiplying input voltage by the input current (i.e., 663 VA). -
Page 39: Output Parameters
5. RS-232 TERMINAL COMMUNICATION 5.7 Output Parameters “OUTPUT PARAMETERS” provides UPS Output Voltage, Current, Volt Amps, Power in Watts, Power Factor, and Line Frequency information. OUTPUT #1 Voltage The RMS voltage measured at the output of the UPS (i.e., 120 VAC). Current The flow of current measured at the output of the UPS (i.e., 3.1 Amps). -
Page 40: Battery Parameters
5. RS-232 TERMINAL COMMUNICATION 5.8 Battery Parameters “BATTERY PARAMETERS” provides UPS Battery Voltage, Charger Current, and Charger Status information. Voltage Voltage indicates the average DC voltage of UPS batteries. When the UPS is running in “LINE PRESENT” mode and the batteries are charged, the voltage will be approximately 27.6 VDC (equal to the charger’s “FLOAT”... -
Page 41: User Parameters
5. RS-232 TERMINAL COMMUNICATION 5.9 User Parameters “USER PARAMETERS” allows you to set the information for automatic test, output voltage shutdown, display unit identification, and to change the security codes. Whenever one of the USER PARAMETER items is accessed, you are prompted for a security code. Note: The code (1111) is preset at the factory and can be changed by entering the SET USER SECURITY CODE screen (menu item 58). - Page 42 5. RS-232 TERMINAL COMMUNICATION 5.9 User Parameters, continued Set Test Schedule The UPS can be setup to perform a routine self-test at intervals you specify. This will place the UPS into “LINE FAILURE” mode at a specific time in order to test its functionality and the capacity of the batteries. Set Test Start (DD:HH:MM = dd:hh:mm) dd = Days hh = Hours...
- Page 43 5. RS-232 TERMINAL COMMUNICATION 5.9 User Parameters, continued Set User Security Code The security code is used to restrict entry into certain areas of the program. The code (1111) is preset at the factory and allows access to USER PARAMETERS and HISTORY programs. The security code can be changed using the number keys on the keypad.
- Page 44 5. RS-232 TERMINAL COMMUNICATION 5.9 User Parameters, continued Cancel Output Shutdown This command cancels any pending or current UPS output shutdown. This command requires the USER SECURITY CODE. Recover Output Shutdown Only When AC Line Restored (xxx) xxx=“Yes” or “No”, (Default value is “Yes”) This command determines when the CFR restores output power after a output shutdown.
- Page 45 5. RS-232 TERMINAL COMMUNICATION 5.9 User Parameters, continued Disable Transmission of Unsolicited Alarms “509 None (xxxx)”; xxxx= “active” or blank; default is “active.” Setting this option to “active” disables the transmission of all unsolicited alarm messages. USER SECURITY CODE is required to set this option. Transmit IPC-XXX Type Unsolicited Alarms “IPC-XXX (xxxx)”;...
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Page 46: Maintenance Parameters
5. RS-232 TERMINAL COMMUNICATION 5.10 Maintenance Parameters “MAINTENANCE PARAMETERS” allow you to customize UPS detection and warning characteristics. Normally, there should be no need to change these factory settings. CAUTION: If any of these parameters are changed, it is vital to thoroughly test the UPS since an improper adjustment can render the unit useless. - Page 47 5. RS-232 TERMINAL COMMUNICATION 5.10 Maintenance Parameters Max. PLL Slew Rate Increasing this value will reduce the speed at which the Phase Locked Loop (PLL) will change the output frequency while the UPS resumes LINE PRESENT operation after a line fault has been corrected. It will also increase the time required to resume LINE PRESENT operation.
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Page 48: Parameter Dump Command
5. RS-232 TERMINAL COMMUNICATION 5.11 Parameter Dump Command (Function 0) Parameter Dump Command (Function 0) Function ‘0’ displays all UPS parameters in the following format: #####,###.#,#####,#####,##.##,###.#,#####,###.#,#####,###.#,#####,#####,##.##, ###.#,###.#,###.#,xxxxx,#####,#####,#####,#,##,##,##,##,##,##,##,##, ###############,############ <CR> <LF> Where ‘#’ indicates a digit or a blank character and ‘x’ represents a letter. -
Page 49: Event Descriptions
5. RS-232 TERMINAL COMMUNICATION 5.12 Event Descriptions (Alarms) There are 6 alarm groups which upon activation will be displayed at the end of the opening menu. These are: INPUT: BATTERY: OUTPUT: ENVIRONMENTAL: SERVICE1: SERVICE2: The following lists the mnemonics and description for each alarm group: INPUT: FREQ_LO - input line frequency low... - Page 50 5. RS-232 TERMINAL COMMUNICATION 5.12 Event Descriptions (Alarms), continued Several alarms can be triggered during the same event. If there is a loss of AC line voltage, for example, the UPS may detect a glitch, low frequency and blackout. Low Battery Warning (LO_BAT_WARN) - The batteries are near the end of their useful charge.
- Page 51 5. RS-232 TERMINAL COMMUNICATION 5.12 Event Descriptions, continued Blackout (BLACKOUT) - The blackout alarm is triggered when the input voltage is lost for 12 ms, or when the RMS input voltage is less than 1/2 the nominal voltage for 100 ms or longer. * * Frequency High (FREQ_HI) - A frequency high alarm is triggered when there is a power line problem where the input frequency increases beyond the preset limit.
- Page 52 5. RS-232 TERMINAL COMMUNICATION 5.12 Event Descriptions, continued Input Line Fail - Indicates that the UPS switched to backup power to protect the equipment for one (or more) of the above conditions. * * Normal Line Mode - Indicates that the UPS is drawing power from the AC line and charging the batteries.
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Page 53: Rs-232 Terminal Setup
5. RS-232 TERMINAL COMMUNICATION 5.13 RS-232 Terminal Setup Terminal Emulation Setup If you are using a terminal emulation software (such as PROCOMM) to communicate with the CFR, use the following setup: Emulation Type: VT100 or compatible Duplex Mode: Half Duplex Xon/Xoff Flow Control: SID: ON, IID: OFF RTS/CTS Flow Control:... -
Page 54: Maintenance
6. MAINTENANCE 6.1 CFR Maintenance The electronic components used in the UPS require no maintenance. If the unit fails to perform a specific function, refer to the troubleshooting guide. The guide lists typical symptoms, causes and solutions that apply to the UPS, starting with the most obvious and working systematically through the unit. -
Page 55: Battery Testing
Switch the load ON, one device at a time. To determine recharge time, subtract the time you resumed LINE PRESENT operation from when the “LOW BATTERY WARNING” LED goes OFF. Figure 14 - Standard Interface Device ALPHA TECHNOLOGIES 05-07-92 08:02:10 LINE PRESENT... -
Page 56: Removing The Cfr Front Panel And Cover
6. MAINTENANCE 6.4 Removing the CFR Front Panel and Cover CAUTION: INTERNAL MAINTENANCE SHOULD BE SERVICED ONLY BY QUALIFIED PERSONNEL. 1. Disconnect all loads from the OUTPUT receptacles on the UPS. 2. Switch the rear panel BATTERY circuit breaker OFF. 3. -
Page 57: Internal Battery Replacement
BATTERIES SHOULD BE INSPECTED EVERY YEAR FOR SIGNS OF CRACKS, LEAKING OR SWELLING. ALWAYS REPLACE BATTERIES WITH THOSE OF AN IDENTICAL TYPE AND RATING. NEVER INSTALL OLD OR UNTESTED BATTERIES. CONTACT ALPHA TECHNOLOGIES TO ORDER AND RECYCLE BATTERIES. Figure 17 Internal Battery Replacement CFR 600 (top view) - Page 58 BATTERIES SHOULD BE INSPECTED EVERY YEAR FOR SIGNS OF CRACKS, LEAKING OR SWELLING. ALWAYS REPLACE BATTERIES WITH THOSE OF AN IDENTICAL TYPE AND RATING. NEVER INSTALL OLD OR UNTESTED BATTERIES. CONTACT ALPHA TECHNOLOGIES TO ORDER AND RECYCLE BATTERIES. CFR 600XT only Figure 18...
- Page 59 6. MAINTENANCE 6.5 Internal Battery Replacement, continued Figure 19 Battery Tie-down Strap Loop (side view)
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Page 60: Troubleshooting Guide
6. MAINTENANCE 6.6 Troubleshooting Guide SYMPTOM CAUSE REMEDY No Output Power: Utility power outage; "LINE PRESENT" OFF "LINE FAILURE" OFF AC power cord Plug in AC power cord. unplugged; AC input circuit breaker Reset breaker. OFF. BATTERY circuit Reset breaker. breaker OFF. - Page 61 6. MAINTENANCE 6.6 Troubleshooting Guide, continued SYMPTOM CAUSE REMEDY No output voltage Battery voltage below Wait for line power to during utility outage: low voltage cutout return and recharge "LINE PRESENT" OFF (after long outage). batteries. "LINE FAILURE" OFF "LOW BATTERY Battery voltage below Wait for batteries to SHUTDOWN"...
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Page 62: Troubleshooting Using The Sid
6. MAINTENANCE Troubleshooting Using the SID The OUTPUT LOAD LED’s, located on the front panel of the Standard Interface Device, are designed to display UPS fault conditions once the unit has detected an internal problem, indicated by the SERVICE LED. This information provided by the LED’s is extremely useful during troubleshooting and maintenance. - Page 63 6. MAINTENANCE Troubleshooting Using the SID, continued SYMPTOM CAUSE REMEDY OVERLOAD LED (ON) Fast Detector / Low Call Alpha. SERVICE LED (ON) Sensitivity Fault. ALARM OFF switch pressed and held: 100% LED (Flashing) PLL Fault. Wait for line power to return.
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Page 64: Repair Instructions
6. MAINTENANCE 6.8 Repair Instructions Before returning a unit to Alpha Technologies for repair, a Return Material Authorization (RMA) should first be obtained from Alpha's Customer Service Department. The RMA number should be clearly marked on the unit’s original shipping container. If the original container is no longer available, the UPS should be packed with at least 3 inches of shock-absorbent material. -
Page 65: Specifications
<40 <40 Note: Specifications are based upon use with computer-type loads with a crest factor of 3:1 max., and a typical power factor of 0.75 for CFR 1000 and 0.67 for CFR 600. Dimensions CFR 600 8.5"W x 10"H x 20.5"D (205mm x 140mm x 194mm) CFR 1000 8.5"W x 10"H x 20.5"D (216mm x 254mm x 521mm) - Page 66 7. SPECIFICATIONS 7.1 Specifications, continued Common Specifications 600, [1000 ] Input Frequency 60 Hz or 50 Hz (± 3% Hz) Input Voltage Variation - 25% to + 10% Output Frequency ± 0.1 Hz Output Regulation ± 1% (from 10 - 100% load) Total Harmonic Distortion <...
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Page 67: Warranty
The liability of Alpha Technologies under this warranty is solely limited to repairing, replacing, or issuing credit (at the discretion of Alpha Technologies) provided that: 1. Alpha Technologies is promptly notified in writing, or by telephone, that a failure or defect has occurred; UNITED STATES... -
Page 69: Important
EMERGENCY SHUTDOWN EMERGENCY SHUTDOWN IMPORTANT THE UPS 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; HOWEVER, POWER WILL STILL BE PRESENT AT THE UPS OUTPUT. TO PREVENT THE POSSIBILITY OF INJURY TO SERVICE OR EMERGENCY PERSONNEL, ALWAYS SWITCH THE UPS REAR PANEL BATTERY CIRCUIT BREAKER(S) OFF TO DE-...
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