济南机箱机柜里的时间继电器，符号该怎么看？

　　How to read the symbol of the time relay in the Jinan chassis cabinet?

　　在济南机箱机柜生产的各类电气设备中，时间继电器是个不起眼却很关键的部件，它能精准控制电路的延时通断，保障设备有序运行。但不少电力运维人员或采购济南机箱机柜的企业负责人，面对电气图纸上的时间继电器符号时，总会感到困惑：这些符号到底代表啥意思？其实时间继电器主要分为通电延时和断电延时两种，它们的符号有明确区别，看懂这两种符号的特征，就能轻松分辨类型。今天就专门围绕济南机箱机柜中的时间继电器，给大家科普符号的识别方法。

　　In the production of various electrical equipment in Jinan chassis cabinets, the time relay is an inconspicuous but crucial component that can accurately control the delayed on-off of the circuit, ensuring the orderly operation of the equipment. But many power operation and maintenance personnel or business leaders who purchase Jinan chassis cabinets often feel confused when faced with time relay symbols on electrical drawings: what do these symbols represent? In fact, time relays are mainly divided into two types: power on delay and power-off delay, and their symbols have clear differences. By understanding the characteristics of these two symbols, it is easy to distinguish the types. Today, we will specifically focus on the time relay in the Jinan chassis cabinet and explain the method of symbol recognition to everyone.

　　先给大家简单说说时间继电器的作用，方便理解符号识别的意义。在济南机箱机柜的高压柜、控制柜等设备中，很多电路操作需要“延时执行”，比如设备启动时，要先让辅助电路工作一段时间，再接通主电路；或者设备停机时，要延迟断开某些保护电路。时间继电器就是实现这种延时功能的核心部件，而它的符号则是电气图纸上的“身份标识”，能直接告诉我们它是哪种延时类型，方便运维人员判断工作逻辑、排查故障。

　　First, let me briefly explain the function of time relays to facilitate understanding of the meaning of symbol recognition. In the high-voltage cabinets, control cabinets and other equipment of Jinan chassis cabinets, many circuit operations require "delayed execution". For example, when starting the equipment, the auxiliary circuit needs to work for a period of time before connecting the main circuit; Or when the equipment is shut down, it is necessary to delay the disconnection of certain protective circuits. The time relay is the core component that implements this delay function, and its symbol is the "identity identifier" on the electrical drawing, which can directly tell us what type of delay it is, making it convenient for operation and maintenance personnel to judge the work logic and troubleshoot.

　　种是通电延时型时间继电器，它的符号有个很明显的特征——符号内部是“又又”的样式，而且在符号后面还会带有“延时闭合”的标识。大家可以这么记：“又又”的样式就像延时功能的“专属标记”，看到这个标记再加上延时闭合标识，就能确定是通电延时型。它的工作逻辑也很直观：当电路通电后，它不会立刻闭合，而是会按照预设的时间延迟一段时间，之后才完成闭合动作，接通后续电路。这种类型在济南机箱机柜的设备启动控制中很常用，能避免多个部件同时启动造成的电流冲击。

　　The first type is the power on delay type time relay, which has a very obvious feature in its symbol - the symbol has a "again and again" style inside, and there is also a "delay closure" symbol after the symbol. You can remember that the style of "again and again" is like the "exclusive mark" of the delay function. By adding the delay closure symbol to this mark, you can determine that it is a power on delay type. Its working logic is also very intuitive: when the circuit is powered on, it will not immediately close, but will delay for a predetermined period of time before completing the closing action and connecting the subsequent circuit. This type is commonly used in the equipment startup control of Jinan chassis cabinets, which can avoid the current surge caused by multiple components starting at the same time.

　　第二种是断电延时型时间继电器，它的符号和通电延时型有明显区别，很好区分。符号内部是实心的，不再是“又又”的样式；其次，它的整体画法和通电延时型是反过来的，从图纸上能直接看出方向差异。更关键的是，要结合它的工作特点来辅助识别：这种时间继电器通电后不会延时，而是会瞬时闭合，只有当电路断电之后，它才会缓慢断开。所以它的符号也隐含着“瞬时闭合、延时断开”的逻辑，在济南机箱机柜的设备停机保护电路中应用广泛，能确保设备停机后，保护功能还能持续一段时间，避免意外故障。

　　The second type is the power-off delay type time relay, which has a distinct symbol from the power on delay type and is easy to distinguish. Firstly, the interior of the symbol is solid, no longer in the style of 'again and again'; Secondly, its overall drawing method is reversed from the power on delay type, and the directional difference can be directly seen from the drawing. More importantly, it is necessary to combine its working characteristics to assist in identification: this type of time relay will not delay when powered on, but will instantly close, and only slowly disconnect when the circuit is powered off. So its symbol also implies the logic of "instantaneous closure, delayed disconnection", which is widely used in the equipment shutdown protection circuit of Jinan chassis cabinets. It can ensure that the protection function can continue for a period of time after the equipment is shut down, avoiding unexpected failures.

　　可能有人会问，为啥要精准区分这两种符号？对济南机箱机柜的使用和维护来说，这直接关系到设备的正常运行和操作。如果把断电延时型的符号当成了通电延时型，按错误的逻辑去检修或调试设备，很可能导致电路控制混乱，比如设备启动时主电路提前接通，引发部件损坏；或者停机时保护电路过早断开，留下隐患。而且济南本地的机箱机柜厂家，在生产设备、绘制电气图纸时，都会严格遵循电气符号标准，所以只要掌握了这两种符号的核心区别，不管是看图纸还是实际维护，都能少走弯路。

　　Some people may ask, why do we need to accurately distinguish between these two symbols? For the use and maintenance of Jinan chassis cabinets, it is directly related to the normal operation and operational safety of the equipment. If the symbol of power-off delay type is mistaken for power on delay type and the equipment is repaired or debugged according to the wrong logic, it is likely to cause confusion in circuit control, such as the main circuit being prematurely connected when the equipment is started, causing component damage; Or protect the circuit from premature disconnection during shutdown, leaving a safety hazard. Moreover, local chassis and cabinet manufacturers in Jinan strictly follow the national electrical symbol standards when producing equipment and drawing electrical drawings. Therefore, as long as you master the core differences between these two symbols, whether it is reading drawings or actual maintenance, you can avoid detours.

　　给济南本地的企业和运维人员提个实用建议：在查看济南机箱机柜的电气图纸时，识别时间继电器符号可以分两步走，步看符号内部是“又又”样式还是实心的，第二步看符号方向和附带的标识（延时闭合/延时断开），两步结合就能精准判断类型。另外，在实际操作设备前，先根据符号确认时间继电器的类型，再结合设备说明书了解具体的延时参数，避免误操作。如果是采购济南机箱机柜，也可以要求厂家在图纸上明确标注时间继电器的类型和符号含义，方便后续维护。

　　A practical suggestion for local enterprises and operation and maintenance personnel in Jinan: When viewing the electrical drawings of Jinan chassis cabinets, identifying the time relay symbol can be done in two steps. The first step is to check whether the symbol inside is in a "again and again" style or solid. The second step is to check the direction of the symbol and the accompanying identification (delayed closing/delayed opening). By combining the two steps, the type can be accurately determined. In addition, before operating the equipment in practice, it is best to confirm the type of time relay based on the symbol, and then understand the specific delay parameters in conjunction with the equipment manual to avoid misoperation. If it is to purchase Jinan chassis cabinets, the manufacturer can also be required to clearly indicate the type and symbol meaning of the time relay on the drawings to facilitate subsequent maintenance.

　　总结下来，济南机箱机柜中时间继电器的符号识别核心很简单：通电延时型看“又又”样式+延时闭合标识，断电延时型看实心内部+反向画法，再结合各自的工作特点就能轻松区分。看懂这些符号，是正确使用和维护济南机箱机柜电气设备的基础，能有效提升工作效率、避免事故。如果大家在查看济南机箱机柜的电气图纸时，对时间继电器符号还有疑问，不妨咨询对应的机箱机柜厂家，获取更详细的图纸解读和技术指导。

　　In summary, the symbol recognition core of time relays in Jinan chassis cabinets is very simple: for the power on delay type, look at the "again and again" style+delay closure identification; for the power-off delay type, look at the solid interior+reverse drawing method. Combined with their respective working characteristics, they can be easily distinguished. Understanding these symbols is the foundation for correctly using and maintaining electrical equipment in Jinan chassis cabinets, which can effectively improve work efficiency and avoid safety accidents. If you have any questions about the time relay symbol when viewing the electrical drawings of the Jinan chassis cabinet, you may consult the corresponding chassis cabinet manufacturer for more detailed drawing interpretation and technical guidance.

　　本文由 济南机箱机柜 友情奉献.更多有关的知识请点击  http://www.tongyuhengcheng.com/   真诚的态度.为您提供为的服务.更多有关的知识我们将会陆续向大家奉献.敬请期待.

　　This article is a friendly contribution from Jinan Chassis Cabinet For more related knowledge, please click http://www.tongyuhengcheng.com/ Sincere attitude To provide you with comprehensive services We will gradually contribute more relevant knowledge to everyone Coming soon.