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Technology Type:
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Your choices are...
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On-line (Double-conversion)
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The load is supplied from a power converter that always operates and takes its input from a DC supply, which consists of a battery, and a large battery charger, which are connected in parallel. On-line UPSs provide the highest quality of power protection by using a double-conversion technique. The UPS takes the incoming A/C power and recreates it by converting the voltage to D/C, then conditioning the power to eliminate noise, sags, or surges, and, finally, converting it back to A/C before it exits the UPS. Since the power runs continuously through the inverter, there is no transfer or switching time to battery mode in the event of a blackout.
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Line-interactive
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The inverter works in parallel with conditioned input AC power to supply power to the load (boosting or bucking), and only handles the full load power when the AC input power fails. Line-interactive UPSs provide protection from spikes and surges, as well as supplying auxiliary power if voltage sag or a blackout occurs. Unlike the standby units, line-interactive UPSs provide automatic voltage boost (or buck) when the power dips, without accessing the batteries. This feature provides continuous line conditioning, promotes longer battery life, and eliminates electronic "noise" that can cause minor application errors and loss of data.
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Off-line (Standby)
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Power is usually derived directly from the power line, until power fails. After power failure, a battery-powered inverter turns on to continue supplying power. With this type of power supply, power comes directly from the A/C outlet until the voltage sags or the power fails. After the power sags or fails, a battery-powered inverter almost immediately turns on to continue to supply you with power. Batteries are charged, as necessary, when direct A/C power is available. Even while power is coming directly from the A/C outlet, the UPS provides protection from voltage spikes and surges.
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Other
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There exist other UPS types for three phase power; however they are uncommon and include ferroresonant or rotary types using motor-generators.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Protection
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Your choices are...
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Lightning
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The device provides protection against lightning.
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Voltage Sags
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The device provides protection against voltage sags. Voltage sags are brief reduction in the voltage on ac power systems.
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Short Circuit
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The device provides protection against short-circuits.
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Surge
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The device provides protection against surge.
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Over Voltage
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The device provides protection against over voltage transients.
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Unbalanced Loads
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The device provides protection against unbalanced Loads.
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Other
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Other unlisted protection types.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Interface Options
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Many UPS units allow for the status of the UPS to be monitored from a PC or other remote location. In addition to monitoring, UPS units can also permit the initiation of test cycles and configuration changes of the unit via varying interface options.
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Your choices are...
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Serial
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A port, or interface, that can be used for serial communication, in which only 1 bit is transmitted at a time (RS232, RS422, RS485).
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Parallel
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Outputs a parallel digital signal (e.g. PC parallel printer port).
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Modem
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Modulator-demodulator. A modem is a device or program that enables a computer to transmit data over telephone lines. Computer information is stored digitally, whereas information transmitted over telephone lines is transmitted in the form of analog waves. A modem converts between these two forms.
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Ethernet
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A local-area network (LAN) protocol developed by Xerox Corporation in cooperation with DEC and Intel in 1976. Ethernet uses a bus or star topology and supports data transfer rates of 10 Mbps. The Ethernet specification served as the basis for the IEEE 802.3 standard, which specifies the physical and lower software layers. Ethernet uses the CSMA/CD access method to handle simultaneous demands. It is one of the most widely implemented LAN standards.
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Wireless
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A wireless interface such as RF or IR.
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PC Card Interface (PCMCIA)
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PC Cards are credit card-size peripherals that add memory, storage, and I/O interface to computers in a rugged, compact form factor. PCMCIA (Personal Computer Memory Card International Association) is the name of an organization that has developed standards for PC Card technology along with Miniature Card and SmartMedia cards.
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Other
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Other unlisted, specialized, or proprietary configuration.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Volt-Amp Rating:
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UPSs are rated in volt-amperes (VA) or kilo-VA (kVA). The VA rating is the maximum number of Volts * Amps a unit can deliver. The VA rating is not the same as the power drain (in Watts) of the equipment. The easiest way to find out how many VA is needed is to look at the back of the equipment that is to be protected and note the total number of amps listed for each device. Take the total and multiply it by the nominal voltage (120V) to get the number of VA. For example, a computer and monitor which are both rated at two (2) amps would require 480VA (2A+2A=4A 4Ax120V=480VA). With this rating, at least a 500VA UPS is recommended.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Watt Rating:
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Specify the Watt Rating only if VA Rating is not known (the Watt Rating is less than or equal to VA Rating).
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Runtime at Half Load:
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Runtime at half load: The length of time the UPS will operate during a blackout at half load (VA).
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Runtime at Full Load:
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The length of time the UPS will operate during a blackout at full load (VA).
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Maximum Input Current:
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The maximum amount of input current the device is designed to handle over extended periods of time.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Full Load Output Current:
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The amount of current output by the unit under a full load during a blackout.
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Search Logic:
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All matching products will have a value greater than or equal to the specified value.
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Precise identification of the electrical system is critical in the proper selection and application of a UPS device. Phase refers to difference between two or more alternating current waveforms. There are 360 degrees in a complete cycle (as a generator completes one rotation). 3-phase systems produce three sets of sine waves that are 120 degrees apart or "out of phase" from each other (3 x 120 = 360). That is phases a-b, b-c, and a-c are 120 degrees apart from each other. However, when you use only two of the legs of a 3-phase system, it is single phase since there is no other phase that it is "out of phase" with. The term two-phase is a misnomer, although many electricians use it. There is only ONE sine wave hence it is single-phase. The voltage options listed are the most common electrical systems utilized. Where single values are given, this is the L-N value. Where multiple values are given (i.e. X/Y), the first listing is the L-N value, and the second listing is the L-L value.
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Three Phase Input
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Your choices are...
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All Three Phase
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All three phase configurations, WYE, Delta, and International.
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Three Phase, WYE Only
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A Wye connection refers to a polyphase electrical supply where the source transformer has the conductors connected to the terminals in a physical arrangement resembling a Y. Each point of the Y represents the connection of a hot conductor. The angular displacement between each point of the Y is 120 degrees. The center point is the common return point for the neutral conductor.
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Three Phase, Delta Only
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A standard three-phase connection with the ends of each phase winding connection in series to form a closed loop with each phase 120 electrical degrees from the other.
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Three Phase, International Only
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Input is three phase, International configuration.
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Search Logic:
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All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Three Phase Output
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Your choices are...
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All Three Phase
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All three phase configurations, WYE, Delta, and International.
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All Three Phase, WYE
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A Wye connection refers to a polyphase electrical supply where the source transformer has the conductors connected to the terminals in a physical arrangement resembling a Y. Each point of the Y represents the connection of a hot conductor. The angular displacement between each point of the Y is 120 degrees. The center point is the common return point for the neutral conductor.
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All Three Phase, Delta
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A standard three-phase connection with the ends of each phase winding connection in series to form a closed loop with each phase 120 electrical degrees from the other.
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All Three Phase, International
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Output is three phase, international configuration.
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Three Phase, 4-wire (WYE): 120/208 VAC
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Three phase, 4-wire, WYE, 120 L-N, 208 L-L VAC.
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Three Phase, 4-wire (WYE): 220/380 VAC
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Three phase, 4-wire, WYE, 220 L-N, 380 L-L VAC.
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Three Phase, 4-wire (WYE): 277/480 VAC
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Three phase, 4-wire, WYE, 277 L-N, 480 L-L VAC.
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Three Phase, 4-wire (WYE): 347/600 VAC
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Three phase, 4-wire, WYE, 347 L-N, 600 L-L VAC.
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Other Three Phase, 4-wire (WYE)
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Other unlisted, specialty, or proprietary three phase, 4-wire, WYE configurations.
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Three Phase, 3-wire (Delta): 240 VAC
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Three phase, 3-wire, Delta, 240 L-N, VAC.
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Three Phase, 3-wire (Delta): 380 VAC
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Three phase, 3-wire, Delta, 380 L-N, VAC.
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Three Phase, 3-wire (Delta): 480 VAC
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Three phase, 3-wire, Delta, 480 L-N, VAC.
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Three Phase, 3-wire (Delta): 600 VAC
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Three phase, 3-wire, Delta, 600 L-N, VAC.
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Other Three Phase, 3-wire (Delta)
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Other unlisted, specialty, or proprietary three phase, 3-wire, Delta configurations.
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Three Phase, 4-wire (Delta): 120/240 VAC
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Three phase, 4-wire, Delta, 120 L-N, 240 L-L VAC.
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Other Three Phase, 4-wire (Delta)
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Other unlisted, specialty, or proprietary three phase, 4-wire, Delta configurations.
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Three Phase, International: 220/380 VAC
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Three phase, International, 220 L-N, 380 L-L VAC.
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Other Three Phase, International
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Other unlisted, specialty, or proprietary three phase, International configurations.
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Search Logic:
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Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
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Application Software Included?
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Software for control or for monitoring UPS performance.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Automatic Restart?
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Upon correction of Power problems, UPS initiates startup routine for protected loads.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Automatic Saving?
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Upon power outage, UPS initiates auto save routine for application data.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Automatic Shutdown?
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Upon power outage, UPS initiates shutdown routine for protected loads.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Battery-free
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The UPS does not use chemical batteries for energy storage. Battery-free energy storage alternatives include; flywheel energy storage, ultra-capacitors, super-cooled electromagnets, and hydraulic or pneumatic energy storage.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Event Logging?
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UPS stores power events for future review.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Expandable Battery Jacks?
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Allows user to daisy chain additional battery packs to increase runtime.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Hot-swappable Batteries?
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Allows replacement of the internal battery, without shutting down the connected load.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Integral Audible Alarms?
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The unit contains alarms, which activate upon status conditions. On occurrence of a power loss or surge, an audible alarm is activated.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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LCD or LED Display?
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An LCD display or LEDs allow the device to display status and performance readings.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Maintenance Bypass Switch?
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If the UPS is broken or is being serviced, the switch allows bypass power to pass through to equipment without endangering those working on the UPS device.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Remote Monitoring Contacts?
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Dedicated contacts for use in remote monitoring or alarming in addition to any PC interface.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Self-diagnostics?
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Unit can perform self-test to ensure integrity of diagnostic components. System is able to perform internal checks to ensure it is properly grounded, powered etc.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Static Bypass Switch?
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Allows UPS to switch to utility or standby input in the event of a UPS overload or other problem.
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Search Logic:
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"Required" and "Must Not Have" criteria limit returned
matches as specified. Products with optional attributes
will be returned for either choice.
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Operating Temperature:
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The temperature range over which the device must operate.
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Search Logic:
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User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
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