>>>>>型号:SR489-P5-LO-A20-E 模拟输出继电器 用于管理和保护发电机
【功能描述】
489-P5-LO-A20-E 是 GE SR 系列继电器中的 GE Multilin 继电器（与 GE Multilin 469 电机保护继电器和 GE Multilin 735 馈线保护继电器同属一个系列）。 489-P5-LO-A20-E 专为发电机保护而设计，可用于感应或同步发电机。该装置可以在 25、50 或 60 Hz 下运行。
489-P5-LO-A20-E 设计有 40 个字符的显示屏，允许用户查看值信息、诊断和设定值。前面板包括数字键盘、状态指示灯、升值键和键、RS232 端口接口以及控制和编程键，包括复位键、回车键、菜单键、菜单向上键和菜单向下键。这允许在不连接到外部计算机的情况下进行控制。
后面板包括 12 个 RTD 输入、6 个输出继电器、2 个 RS485 通信端口和 4 个 VT 输入。RTD可现场编程。通信端口可以使用 ModbusRTU 或 DNP 3.0 协议（或两者兼而有之），最高可达 19200 bps。
489-P5-LO-A20-E 的后面板还包括 4 个隔离的 4-20 mA 模拟输入和输出以及 7 个可分配的数字输入。有 7 个 CT 输入，用于三相输出/三相中性线和接地电流检测，以及一个单独的安全和滤波器接地。489-P5-LO-A20-E 上的所有输入均符合 SWC、C37.990 EMI 和 RFI 抗干扰能力。
>>>>>型号:SR489-P5-LO-A20-E 模拟输出继电器 用于管理和保护发电机
【英文介绍】
489-P5-LO-A20-E is a GE Multilin relay in the GE SR family of relays (in the same family as the GE Multilin 469 motor protection relay and the GE Multilin 735 feeder protection relay). The 489-P5-LO-A20-E is designed for generator protection and can be used in induction or synchronous generators. The unit can operate at 25, 50 or 60 Hz.
The 489-P5-LO-A20-E is designed with a 40-character display that allows users to view value information, diagnostics, and set values. The front panel includes a numeric keypad, status indicators, appreciation and keys, RS232 port interfaces, and control and programming keys, including reset, Enter, menu, menu Up, and menu Down keys. This allows control without being connected to an external computer.
The rear panel includes 12 RTD inputs, 6 output relays, 2 RS485 communication ports, and 4 VT inputs. RTD is field programmable. Communication ports can use ModbusRTU or DNP 3.0 protocols (or both) up to 19200 bps.
The rear panel of the 489-P5-LO-A20-E also includes four isolated 4-20 mA analog inputs and outputs and seven assignable digital inputs. There are 7 CT inputs for three-phase output/three-phase neutral line and ground current detection, as well as a separate safety and filter ground. All inputs on the 489-P5-LO-A20-E are SWC, C37.990 EMI and RFI compliant.
>>>>>型号:SR489-P5-LO-A20-E 模拟输出继电器 用于管理和保护发电机
