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2.
Which type of electrical wave from does it produce to
power your equipment? |
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The quality of the electricity
delivering from a UPS to your sensitive electronic equipment
is the most important factor when purchasing a UPS. If the
UPS is not properly designed, it can eventually damage the
equipment it was purchased to protect
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3.
Does this UPS offer enough
protection against power line noise? |
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Noise in power line come from many different sources. The
Power coming into your building often already has electrical
noise problems. The equipment in your building can also
generate noise. The motor running the elevator in your
building or the one in your
photocopier can be the cause of such a noise. There
are two general types of electrical line noise the UPS
should protect against: Normal-Mode Noise & Common-Mode
Noise. In order to get ride of the data errors, data loss,
and erratic computer operation caused by electrical noise on
the ground line, a UPS that provides at least 99% (40dB)
rejection of Common-Mode Noise. |
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4.
Can this UPS safely stabilize the voltage variances without using
battery energy? |
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Voltage sags (Brownouts) and overvoltages are the most
common type of power problem met by users. Voltage
regulation is a key part to comprehensive power protection.
A UPS with AVR (Auto Voltage Regulator) can compensate for
power that is too weak (to boost) and buck down power that
is too strong. Without AVR function, a UPS switches battery
power during even minor sag or little overvoltage. The
frequent use of batteries can greatly reduce the battery
life time and leave the batteries undercharge when a full
blackout happens. For example, UPS with AVR can handle a
correction range of 90V to 150V for 120V equipment (173V to
288V for 230V equipment) without switching to batteries in
UPS |
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5.
Does this UPS provide
sufficient surge protection? |
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A UPS not only provide battery back up but also protect your equipment against dangerous
surges or spikes in your city power line. When looking into this
aspect, you need to look for the following features. |
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a. Multi-level suppression circuitry
b. Fire-Prevention Capability
C. Minimum of 10,000 peak current
capacity
d. Tel Line / Fax line / Networking / Modem Protection
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6.
How much battery back up time
does this UPS need to have? |
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When purchasing a UPS, you need to think about how much back up
time you need to have for your equipment? Do you need only few
minutes to save your files and safely shut down your computer or
you need to have long time back up for many hours? You need to
consider this aspect when purchasing
a UPS. The battery quality is also an important factor to
consider how strong your UPS is when a total blackout occurs in
General. It is better to select a UPS whose full load rating is
at least 125% larger than the load you intend to connect to a
UPS. |
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7.
What kind of software does this UPS provide to monitor power
status? |
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when any power problem occurs, the
UPS needs to inform you immediately and can quickly recognize
the problems before uptime is affected. By meeting such a
requirement a good monitoring software is indispensable.
Following features are necessary. Unattended workstation and
Server shutdown / Automatic reboot/ Application shutdown /
Control of outlet receptacle operation / Paging and e-mail
notification when power problem occurs / SNMP management for
integrated network management, even from a remote location.
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8.
How do you know your UPS is working properly? |
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A UPS is like insurance. When you
really need it, it must
function properly. you need to know how healthy your UPS is all
the time. Your UPS need to have at least following key
diagnostic tools to make sure it is functioning normally:
self-testing and battery testing/ Power status display /
Warnings-locally or remotely / historical Power Events or Logs.
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9.
Has this UPS been certificated by authorized institutions? |
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Proper Safety certifications are required to make sure your UPS
doesn't cause a fire or a shock hazard even when it is used
abnormal circumstance. for Ac 1xOV countries,UL 1778 is a must.
for AC 2xOV countries, CE is a must. Additional certificates
such as TUV, VDE are favourable. |
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