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[ The PC Guide | Systems and Components Reference Guide | Power | External Power ]

Comparison of Power Protection Methods

The table below compares the different power protection options, showing the approximate amount of protection each offers against common power problems. The protection levels shown are typical, but depend very much on the individual device.

Note: The ratings for all UPS types assume that the unit incorporates surge suppression and filtering capabilities, since most quality ones do. If the UPS does not, then the protection level for surges and lightning strikes will drop to pretty much the same levels for those problem types as listed under "No Protection".

Protection Type

Line Noise

Surges

Lightning Strikes

Brown- outs

Black- outs

Cost

Passive Protection

No Protection

Low to High

Low

Very Low

None

None

None

Surge Suppressor

Med to High

High

Low

None

None

Very Low

Line Conditioner

Almost Perfect

Very High

Med

Med

None

Med to High

Backup Power (UPS)

Standby UPS

Med to High

High

Med

Almost Perfect

High

Med to High

Ferroresonant
Standby UPS

Almost Perfect

Very High

Med to High

Almost Perfect

Very High

High to Very High

Line- Interactive UPS

Almost Perfect

Very High

Med to High

Almost Perfect

Very High

Med to High

Online UPS

Almost Perfect

Almost Perfect

High

Perfect

Almost Perfect

Very High

Next: The Power Supply


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