Products & Services
A Hidden Reliability Threat in UPS Static Bypass Switches
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Reference
SPD_SADE-5TNRQ3_EN
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Type
White paper
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Languages
English
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Date
16/04/2010
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Version
V1
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Reference
SPD_SADE-5TNRQ3_EN
-
Type
White paper
-
Languages
English
-
Date
16/04/2010
-
Version
V1
Description:
IT managers will be surprised to learn that some medium and high power UPS systems on the market today (rated 50 kW and higher) use undersized static bypass switches despite their negative implications. By using a contactor or a circuit breaker in parallel with SCRs, these static bypass switches are able use smaller, less expensive SCRs that are rated to carry less than full load current continuously. This paper shows that the availability of the UPS system is compromised when undersized static bypass switches are employed in the system. The advantages of fully rated static bypass switches are discussed.
Product Ranges:
Symmetra MW
Files for Download
Description:
IT managers will be surprised to learn that some medium and high power UPS systems on the market today (rated 50 kW and higher) use undersized static bypass switches despite their negative implications. By using a contactor or a circuit breaker in parallel with SCRs, these static bypass switches are able use smaller, less expensive SCRs that are rated to carry less than full load current continuously. This paper shows that the availability of the UPS system is compromised when undersized static bypass switches are employed in the system. The advantages of fully rated static bypass switches are discussed.
Product Ranges:
Symmetra MW
