目前，因锅炉汽包水位保护系统不可靠引起的事故屡有发生，造成较大的安全隐患和经济损失。
At present, accident caused by unreliability of drum water-level function system occurs from time to time, which leads to security risks and economic losses.
文章主要讨论了锅炉汽包水位高低保护系统逻辑判断回路的自动切换。
The paper mainly discusses the automatic switching of the logic estimation circuit of the drum boiler's water level protection system.
因此，维持锅炉汽包水位在给定范围内是保护锅炉安全运行的必要条件，也是锅炉正常运行的主要指标之一。
Therefore, the maintenance of the boiler water level in a given range is the protection necessary for safe operation of boilers, boiler properly one of the key indicators of.
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