激活触发跳闸-中英对照
激活联合整流器跳闸系统.
5.2.9 其它可选择的跳闸系统
取决于程序和特定因素，以下故障模式使其对应相关跳闸系统或成为必要或值得拥有。
1. 进料侧盐水槽液面低位（近于零）可以用来启动所有联合低/无流量盐水进料跳闸系统。
2. 对于多用型电解槽电解车间，室内氯气高压能用来启动所有联合整流器跳闸系统。
3. 对于多用型电解槽电解车间，室内氢气高压能用来启动所有联合整流器跳闸系统。
4. 氯气压缩机跳闸能用来启动所有联合整流器跳闸系统。
5. 全仪表气源故障能够用来启动所有联合整流器跳闸系统。
5.3 重要安全警报
此章将会对电解槽可靠安全的运行所需的警报作详述，标有“重要”的为必备警报。其他标记为“可选”的为推荐，但不是最重要的，其所包含的功能一般就具体情况具体而定。
5.3.1每个电解槽上的高压警报（可选）
该警报随单元槽使用时间和情况可进行调节，对于单个电解槽出现的问题可提供早期预警，设定值应在电解槽电压最大载入值上加0.05伏特，视电解槽内单元槽数量增加而增加。
5.3.2每个单元槽上的高压警报（可选）
该警报的信号赖在两种单元槽电压测量装置（详情见于有关跳闸的章节），单元槽电压既能够通过使用单元槽电压测量仪来测量，也能在没有自动电压监测系统的情况下，通过比较一个分框架里两组单元槽的电压来获得。关于此种供选择的系统的设定详情见下文：
(i) 单个单元槽测量装置警报的设定能随单个单元槽的使用时间和情况进行调节。设定值应在单元槽电压最大载入值之上0.25伏特。
(ii) 电压对比装置比较包括一个电解槽内相等数量的单元槽的两组电压。装置设定根据单元槽的使用时间和情况进行调节，使得在正常运行条件下，两组之间相对电压为零伏特。通常可以采用硬接线的单臂电桥回路，但该性能也可以在DCS内运行。该电压偏离警报设定应为+/-0.25伏特，一组单元槽的最大数为10。
5.3.3 电解槽进料侧盐水和进料侧碱液高温警报（重要）
进料侧盐水和碱液温度的测量和报警，设定在最大允许值温度，且符合电解槽和塑料管道系统的限制，设定值应为89℃，如果使用了共同热交换器来控制进料温度，那单用报警器监测共同进料温度就可以了。
Trip Actions
Activates associated rectifier trip system.
5.2.9 Other Optional Trip Systems
Depending upon the process and specific factors it might be desirable / necessary that the following failure modes provide inputs to the relevant trip systems.
1. Low low level in brine feed tank (close to empty) can be used to initiate all associated low / no flow brine feed trip systems.
2. High cellroom chlorine pressure for a multi Electrolyser cellroom could be used to initiate all the associated rectifier trip systems.
3. High cellroom hydrogen pressure for a multi Electrolyser cellroom could be used to initiate all the associated rectifier trip systems.
4. Chlorine compressor trip could be used to initiate all associated rectifier trip systems.
5. Complete instrument air failure could be used to initiate all associated rectifier trip systems.
5.3 Essential Alarms
Alarms required for reliable and safe operation of Electrolysers are detailed in this section. Those labelled ‘essential’ must be provided. Others labelled ‘optional’ are recommended, but not considered essential. Their inclusion is generally decided on a case by case basis.
5.3.1 High voltage on each Electrolyser (optional)
This alarm is adjustable with module age/condition and will give early warning of an individual Electrolyser problem. The setting should be the maximum load Electrolyser voltage plus 0.05 volts multiplied by the number of modules in the Electrolyser.
5.3.2 High voltage for each module (optional)
The signal for this alarm can come from one of two types of module voltage measurement device (see section on trips for further information). Module voltage can either be measured directly using a module voltage scanning instrument, or if there is no automatic voltage monitoring system, it can be inferred from a comparison of voltages across two groups of modules in the pack. Details of the settings for the alternative systems are provided below:
(i) Individual module scanning device alarm setting can be adjusted for individual module age/condition. Setting should be 0.25 volts above maximum load module voltage.
(ii) Voltage comparison device compares voltages of two blocks comprising an equal number of modules within an Electrolyser. The setting of the device is adjusted for module age/condition such that at normal operating conditions the relative voltage of the two blocks is zero volts. Typically a hard wired Wheatstone Bridge circuit will be used for this duty but this function could also be performed within a DCS. The voltage deviation alarm should be set at +/- 0.25 volts, and the maximum number of modules in one block is 10.
5.3.3 Feed brine and feed caustic high temperature to Electrolyser (essential)
Measurement and alarm on Electrolyser feed brine and caustic temperatures, set at maximum allowable temperature consistent with Electrolyser and plastic pipework limits. Setting should be 89C. If common heat exchangers are used to control feed temperatures, single alarm on common feeds will suffice.
2014.8.18