the NOT of 3oo3?
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Permissives to Enter the State Tag Description Permissive XV-1 The above permissives have been written with OR statements to clarify the functional requirements. (Please translate the red sentence) My understanding: NOT refers to the three "Not Closed" corresponding to the permissive (permission) in the above table, and 3oo3 is "three out of three logical votes". This post was last edited by echommm on 2008-2-24 14:07 ]
Echo, is your form scanned from a paper version or an electronic version? 3003 may be the equipment tag or serial number. During the scanning and conversion process, there may be some changes. I agree with the first two points.
The original text may be in PDF version and has been converted. 3OO3 is not 3003, this should be correct.
The above permissives have been implemented as the NOT of 3oo3 Oxygen to Reactor on/off valves Closed. We also have similar chain valves here, which are usually two open and one closed or two closed and one open. During normal operation, they are two open and one closed. When the interlock occurs during parking, they are always two closed and one open. The middle one is a small valve, which generally reacts with the other two. The purpose is to prevent oxygen from mixing into the reactor to avoid causing harm, and the gas in the reactor will not be poured back into the oxygen line. 3oo3 means 3out of 3, that is, choose three out of three. The action is only implemented when all three conditions are met. There is also 2oo3, which is two out of three. Two of the three will act when reaching the chain value. Due to different control requirements, it is designed to avoid unnecessary shutdown due to failure of the measuring equipment. However, it is also necessary to ensure that the chain can take effect when the process fails, so three-out-of-three or two-out-of-three are adopted. Chains are all hard-wired, that is, they have their own priorities. Different control priorities are different, and the priority of chain actions is also high. This way, the original poster can easily translate it. It is not very easy to translate based on the literal meaning.
The meaning of logical voting of three out of three/three out of three is probably clear, but the second half of the sentence is so awkward. The above permissives have been implemented as the NOT of 3oo3 Oxygen to Reactor on/off valves Closed.
The above permissives have been implemented as the NOT of 3oo3 Oxygen to Reactor on/off valves Closed above permissives means the highest priority, indicating that these three valves are all valves with the highest priority. The highest priority is not allowed to be cut out, as this may lead to accidents. This is the program inside the instrument. Cutting chain valves must be signed by the general manager of the company, which is a very important matter in terms of technology and cannot be messed with. Try translation as follows: The highest priority is applied to the switch valve of the three-select oxygen reactor and cannot be cut off.
The above permissives have been implemented ... above permissives does not mean "top priority", it means "above permission", there are three, so use have instead of has.
Of course there are three valves. hehe. All three valves have the highest priority. Permisive indicates priority, not closed indicates that it is not allowed to be removed.