UPS 750 Uninterruptible Power Supply Caterpillar


System Bypass Operation

Usage:

UPS 750 AD2

系统旁通选项

注: 有关所有系统模式的完整说明,请参阅本操作和保养手册, "操作模式"。

当系统需要调节至负载的供电,但不需要保护公共电网断电时,使用内部旁通步骤。

旁通电路会出于下述原因之一向关键母线供电:

  • 需要维护。

  • 由于持续过载或系统故障,UPS 不能维持至负载的电压。

旁通电路提供一条直接从备用交流电源供电的路径。 UPS 控制系统持续监视旁通系统电路的可用性,以执行传输。

系统旁通电路由以下部件组成:

  • 旁通开关(静态)

  • 输出接触器 (UPS)

  • 旁通接触器(系统)

注: 旁通开关(静态)为可选。

输出接触器隔离 UPS 与负载。 旁通接触器(系统)与静态旁通开关(如有配备)并联工作。 静态旁通开关是一个固态装置,该装置可以即刻将备用交流电源与负载连接起来。

注: 静态旁通开关为可选。

系统旁通步骤




图 1g03377486

触摸屏面板和手动 ups 控制装置

(1) 触摸屏

(2) USB 端口

(3) 两位"钥匙开关":正常 - 旁通

(4) EPO 按钮

(5) 喇叭静音按钮

(6) 操作状态 LED

注: 注意:继续进行本步骤会将临界负载从 UPS 输出上断开。 如果不需要该选项,请参阅本手册中的系统旁通步骤。

1 - 将 SIO "钥匙开关"转到"旁通"位置(见图 47)。

2 - 通过观察系统框图/概述屏幕中的系统模式状态,确认系统处于"旁通"位置(见图 49)。 请勿移除输入的设备电源。 直流母线和飞轮将继续接收供电,以悬浮飞轮,直到 SIO 机柜中的直流禁用开关切换到"禁用"位置。 如果在 FPU 机柜中工作,将开关切换到"禁用"。

3 - 允许电容器组放电约 5 分钟以放掉母线和电枢导线中的所有剩余电量。

注: 注意:当飞轮旋转时,直流母线和电枢导线通电。

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