中联重科ZTC251V5起重机的优点有：1.高效节能：该起重机采用了先进的液压系统和电子控制技术，能够实现自动调节功率输出，提高起重机的工作效率，同时降低燃油消耗，实现节能环保。2.灵活多功能：ZTC251V5起重机具有多种工作模式，能够适应不同的作业环境和要求，例如，超高空作业、大跨度横移作业、干扰物穿越等。同时，还配备了多种功能附件，如抢钩、剪刀臂、夹具等，提供更多的作业选择。3.高性能安全：该起重机采用了先进的智能安全控制系统，具有抗风能力强、抗干扰能力强等特点。同时，具备超载保护、限位保护、门架旋转角度限制等安全措施，保障起重机的安全运行。4.智能化管理：ZTC251V5起重机具有智能化管理功能，可实现远程监控和故障诊断，提高作业效率和安全管理水平。同时，还支持智能报警和数据分析，为用户提供全方位的维护保养服务。综上所述，中联重科ZTC251V5起重机具有高效节能、灵活多功能、高性能安全和智能化管理等优点，能够满足不同工程项目的需求，并提供高效、安全、可靠的起重作业。

The advantages of Zoomlion ZTC251V5 crane include:1. High efficiency and energy saving: the crane adopts advanced hydraulic system and electronic control technology, which can realize automatic adjustment of the power output, improve the efficiency of the crane, and at the same time reduce the fuel consumption to realize energy saving and environmental protection.2. Flexible and multi-functional: the ZTC251V5 crane has a variety of working modes, which can adapt to the different operating environments and requirements, for example, ultra-high altitude operation, large-span traverse operation, interference crossing and so on. Meanwhile, it is also equipped with a variety of functional attachments, such as snatch hook, scissor boom, clamps, etc., to provide more operating options.3. High-performance safety: the crane adopts an advanced intelligent safety control system, which is characterized by strong wind resistance and strong anti-interference ability. Meanwhile, it is equipped with overload protection, limit protection, gantry rotation angle limitation and other safety measures to ensure the safe operation of the crane.4. Intelligent management: ZTC251V5 crane has intelligent management function, which can realize remote monitoring and fault diagnosis, and improve the operation efficiency and safety management level. At the same time, it also supports intelligent alarm and data analysis, providing users with a full range of maintenance services. In summary, Zoomlion ZTC251V5 crane has the advantages of high energy efficiency, flexible and multi-functional, high performance safety and intelligent management, which can meet the needs of different projects and provide efficient, safe and reliable lifting operations.