When a single UPS is operating at full load, its load rate should be between 50% and 60% – how should this be understood?
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I would like to ask everyone: according to the explanations in \"HG/T 20509-2014 Code for Design of Instrument Power Supply\", when a single UPS is operating under full load, its load rate should be between 50% and 60%. How is it understood? Does it mean that the UPS capacity should be designed to be 2 times the actual usage?
SHT3082 6.1.1 specifies a design range of 0.8 to 1.2 times
SHT3082 6.1.1 specifies a design range of 0.8 to 1.2 times; this difference is too large
A close examination of the standards shows that there is no conflict here: the SH standard specifies that UPS systems should be configured with 1:1 redundancy, and the HG standard also states that for important chemical processing units, it is advisable to use dual-UPS power supply for the power supply of measurement and control instruments. ” As for the power capacity for instruments, it is generally calculated as 1.2 to 1.5 times the total power consumption of the measuring and control instruments. The explanatory notes for the HG standards explicitly specify the requirements regarding the use of a dual-UPS system in clause 5.3.5, stating that if a single UPS is used instead of a dual one, the load rate should be between 50% and 60%. This does not conflict with SH, because SH does not state that a single channel can be used; it specifies that two channels are required.
According to the SH regulations, UPS+GPS is specified; is it really necessary to have two UPS units?
That is the wiring method, not the capacity.
What I mean is that the SH standard does not specify that UPS units should be configured with 1:1 redundancy; you are suggesting the use of two UPS units, but in fact the instrumentation system can use a single UPS unit combined with GPS, and the capacity of this single UPS unit should be designed to be between 0.8 and 1.2
Mm-hmm, because it’s actually a dual-power supply as well; I didn’t explain it properly. It’s not necessary to have two UPS units.
2 times is too much; 1.2–1.5 times is about right.