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Standard 1778, Edition 5

Uninterruptible Power Systems

UL CSDS Proposal
Standard 1778, Edition 5 Edition Date: November 25, 2016
Summary of Topics b1778_5_20161125_sum.html

Subject 1778

Bulletin Dated: November 25, 2016


The following changes in requirements to the Standard for Uninterruptible Power Systems, UL 1778, are being proposed:

1. Add a dated reference to UL 60950 RD

2. Update references to the component requirements of the RD

3. Update to Table for temperature limits

4. Revision to bus bar temperature limits

5. Add symbol for no telecommunication network

6. Corrections in Annex NNN for short-circuit withstand rating

7. Addition of requirements and figure for short circuit withstand and short circuit closing test port location

8. Updates to References

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