In many refineries and petrochemical plants, electrical equipment can be replaced only during a turnaround (TA). The TA length and workspace are key factors for work that can be accomplished within a finite time frame. This article describes the project execution used to successfully complete a scope of work in the allotted time. At an Olefins plant on the Texas Gulf Coast, a large amount of electrical equipment was removed and installed at six different locations during a 35-day TA window. The electrical equipment included four 15-kV switchgear (SWGR) lineups, seven medium-voltage (MV) motor control centers (MCCs) and high-resistance grounding systems, five 15-kV SWGR relay door upgrades, 21,000 ft of fiber-optic cable, four battery banks, two capacitor switching devices, four automation controllers, and four 15-kV feeder cables. The project execution topics covered are engineering, procurement, expediting, planning, pre-TA staging, and support as well as the challenges discovered prior to and during the TA and how the team overcame them.

中文翻译：

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更换四个 15 kV 开关设备系列和七个中压电机控制中心的成功项目执行：35 天周转期间的案例研究

在许多炼油厂和石化厂中，电气设备只能在周转 (TA) 期间进行更换。TA 长度和工作空间是可在有限时间范围内完成的工作的关键因素。本文描述了用于在指定时间内成功完成工作范围的项目执行。在德克萨斯州墨西哥湾沿岸的一家烯烃工厂，在为期 35 天的 TA 窗口期间，大量电气设备被拆除并安装在六个不同的位置。电气设备包括四个 15 kV 开关设备 (SWGR) 阵容、七个中压 (MV) 电机控制中心 (MCC) 和高电阻接地系统、五个 15 kV SWGR 继电器门升级、21,000 英尺的光纤电缆、四个电池组、两个电容器开关装置、四个自动化控制器和四个 15 kV 馈线电缆。