SR760 面板1219-0003  750/760馈线保护系统

750/760的生产已经停止。作为替代方案，请参考850。

750/760馈线保护系统是SR系列保护继电器的一员，具有抽出能力，用于配电馈线的初级保护和管理。750/760具有适用于工业环境的特定功能，包括在维护期间限制停机时间的抽出外壳和适用于恶劣环境的保形涂层。

关键好处
易于使用的保护，由行业领先的软件支持
精确的内置计量功能
I/O监控-改善正常运行时间
IRIG-B时间同步，事件报告，波形捕获，数据记录器
尽量减少更换时间
抽取的建设
简化测试-内置仿真功能
电动概念:
•控制器与控制器之间的快速通信I / O设备
•抗电磁干扰能力强
•无电位连接，使隔离
发射器过时了
来自ABB S800系统的慢速I/O模块可以添加到任何配置中，取决于项目需求。

SR745-W3-P5-G5-HI

✦产品参数：

关键特性

网络接口- 10Mbps以太网，RS232, RS485和RS422端口
以太网端口，10Mbps
多种协议- ModBus™RTU, ModBus™RTU, TCP/IP, DNP 3.0 Level 2
先进的通信

750/760配备三个标准串行通信端口，一个RS232位于前面板，两个RS485/RS422位于继电器后部。后置以太网端口也可作为可选功能。前面板端口允许方便的本地计算机访问。后端接口提供与DCS、SCADA或PLC的远程通信或连接。所有串口波特率为300 ~ 19200bps。可选的以太网端口可用于连接750/760到10mbps的以太网。750/760支持ModBus®RTU、DNP3.0 Level 2和ModBus®RTU TCP/IP协议。

✦应用领域

应用程序
可靠接地、高阻抗接地或谐振接地系统配电馈线的初级保护和控制
总线阻塞/联锁方案
电弧闪光高速故障检测
换乘方案(巴士换乘方案)
基于电压和频率元素的减载方案
输电线、馈线和变压器的后备保护
分布式发电(DG)互连保护

关键特性

计量——电流、电压、顺序分量、功率、能量、电压
断路器动作和脱扣故障
事件记录- 128个时间标记事件
总断路器电弧电流
环境温度/模拟传感器输入
模拟传感器输入
示波器和数据记录仪- 10记录多达32个电源周期
仿真模式和回放能力。
监察及计量

750/760具有先进的监控和计量功能，其中包括:

故障定位器

继电器使用捕获的数据来计算故障的类型、距离和阻抗。保存最近10次故障的记录。

断路器的条件

继电器计算断路器触点上的每相磨损以建立阈值。当超过断路器维护阈值时，继电器会触发告警。如果继电器检测到监控涓流电流不存在，也会产生警报。在设定的时间内对开或关信号没有反应可以用来产生警报。

VT失败

VT故障特征监控输入电压的每个相位，当检测到故障时产生报警并发送编程输出信号。

模拟输入

任何外部量都可以通过辅助电流输入来监测。两个模拟输入电平监测元件和两个变化率元件可用。当测量量超过拾取电平时，继电器可以触发报警或信号输出。

事件记录

继电器捕获并存储最后512个事件，记录时间、日期、原因和系统参数。事件可以有选择地按类别记录，以便只记录感兴趣的事件。

示波法

可配置的易失性存储器块可用于记录交流输入电压和电流的采样，以及逻辑输入和输出继电器的状态。该内存的配置范围为2 ~ 16块，分别为16 ~ 256个工频周期。记录的事件前数据量由用户设置。跟踪存储器记录可以通过选定的功能或逻辑输入的操作触发。

访问计数器

断路器跳闸操作的次数被记录下来，并可以显示用于统计目的(对没有操作计数器的单位有用)。

Manufacturing for 750/760 has been discontinued. As an alternative, please refer to the 850.

The 750/760 Feeder Protection System, a member of the SR Family of protection relays, with draw out capability intended for primary protection and management of distribution feeders. The 750/760 has specific features for industrial environments, including a drawout case to limit downtime during maintenance and conformal coating for harsh environments.

Key Features

• Metering – current,voltage, sequence components, power, energy, voltage
• Breaker operation & trip failure
• Event recording – 128 time tagged events
• Total breaker arcing current
• Ambient temperature /analog transducer input
• Analog transducer input
• Oscillography & Data Logger – 10 records up to 32 power cycles
• Simulation mode and playback capability.

Monitoring and Metering

The 750/760 features advanced monitoring and metering functions which include:

Fault Locator

The relay uses captured data to calculate the type, distance to and the impedance of the fault. Records of the last 10 faults are stored.

Breaker Conditions

The relay calculates the per-phase wear on the breaker contacts to establish a threshold. When the breaker maintenance threshold is exceeded the relay can trigger an alarm. An alarm is also generated if the relay detects that the supervisory trickle current is not present. A failure to respond to an open or close signal in a programmed time can be used to generate an alarm.

VT Failure

The VT failure feature monitors each phase of input voltage, generating an alarm and sending the programmed output signals when a failure is detected.

Analog Inputs

Any external quantity may be monitored via an auxiliary current input. Two analog input level monitoring elements and two rate-of-change elements are available. When the measured quantity exceeds the pickup level, the relay can trigger an alarm or signal an output.

Event Recording

The relay captures and stores the last 512 events, recording the time, date, cause, and system parameters. Events may be recorded selectively by category, so that only events of interest are recorded.

Oscillography

A block of configurable volatile memory can be used for recording samples of the AC input voltages and current, and the status of logic inputs and output relays. This memory can be configured between the ranges of two to 16 blocks with 16 to 256 power frequency cycles of data respectively. The amount of pre-event data recorded is set by the user. Trace memory recording can be triggered by operation of selected features or logic inputs.

Trip Counter

The number of breaker trip operations is recorded, and can be displayed for statistical purposes (useful for units without operation counters).