Should the automatic control design in design institutes be carried out entirely in accordance with the standards?
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As the title suggests, I have just started working at a design institute, and I’m not quite sure whether automatic control design needs to be carried out strictly in accordance with relevant standards. I would appreciate it if you could give me some advice; after all, it’s my first job, and I’m worried about making mistakes. For example: 1. The specifications for instrument power supply state that 220V instrument power supply should use three-core insulated power cables, while outdoor instruments should employ flexible copper wires with polyethylene or polyvinyl chloride insulation, also with three cores. Do I have to follow these requirements when designing? For example, I’m using a two-core power cable – is that okay for the control cable as well?
It still depends on the specifications. One should satisfy her; it’s best to try one’s best to satisfy her. What is in bold should be satisfied by her at any time and in any place.
If something goes wrong due to non-compliance with standard specifications, who is responsible – you, or the department head, or the director of the design institute?
This post was last edited by CHANGBAISHI on 2022-3-25 at 15:29. Rules are necessary to maintain order; everything should be done in accordance with the rules. Oh, experiments are another matter.
It must be absolutely certain, and it is essential to follow the specifications. Tip: The regulations include provisions that allow for exceptions (phrasing) ； Not all provisions of a standard are mandatory. Using exceptions cautiously, in small amounts, and on a well-founded basis is a reflection of the level of design. For example: outdoor instruments generally should use three-core cables, but if the instrument’s technical manual specifies that a two-core cable should be used for connection, then it is justified to choose a two-core cable.
This post was last edited by qugd on 2022-3-28 at 10:54. Standards are there to be followed; you don’t have to do design work, but if you choose to do it, you must adhere to the standards. Some regulations are established to ensure the proper operation of the system, but the provisions of some of these regulations may have been obtained at the cost of the lives of those working on site. By not following the standards in your work, you show a lack of seriousness and responsibility toward your duties; on top of that, it may also be a sign of disrespect for the lives of those who will use the designs you create in the future. I’m not going overboard by saying this, am I?
What do you want to do without a three-core cable for a 220V power supply?
Are you just playing? Working in isolation without following standards?
I just want to ask which standard the example given by the original poster comes from? There are various norms, standards, and regulations, applicable to different industries, each with its own scope of application. If you’re referring to the rules within your institution, then there is room for negotiation. And even for **standards**, there are those with and without a T, and within the standards, there are various descriptions such as appropriate, should, and must. Although the specifications provide some flexibility, deviating from them or moving away from the standard design cannot be done arbitrarily; there must be a basis for such deviations. This basis could be detailed explanations from authoritative bodies, corrections, or other relevant documents. It might also involve similar regulations from other countries (in cases where no such regulations exist domestically), or reasonable computational validations. Such approaches are more difficult and require a greater level of depth compared to following the standard design. Moreover, when moving away from designs that comply with standard specifications, you also have to consider whether the inspection department will approve them, and who will be held responsible in case of problems.
I mean, in situations like with electromagnetic flowmeters on-site, many of them use only two wires for power supply, rather than three wires; does that mean it doesn’t comply with the standards?