When there is no room for BAM: Mesis®
当没有空间用于BAM：Mesis®
The Mesis® safety concept was developed initially for low-inductance DC capacitors. E68 Mesis® makes it available for AC filter capacitors. The special low-loss and low-inductance design makes these capacitors particularly insensitive to high frequency harmonics and allows them to remain "cool" even with high operating currents.
Mesis®安全概念最初是为低感直流电容器开发的。E68 Mesis®使其适用于交流滤波电容器。特殊的低损耗和低感设计使这些电容器对高频谐波特别不敏感，并且即使在高工作电流下也能保持“冷却 ”。
Just like our tried-and-tested BAM fuses, the innovative Mesis® overpressure switch reacts mechanically to the internal pressure increase that is usually associated with the failure of film capacitors. As Mesis® - unlike the BAM device - does not require an external extension of the housing, the capacitor can be permanently installed and connected to rigid bus bars without impairing the function of the switch.
与我们经过验证的BAM保险丝一样，创新的Mesis®超压开关通过机械方式对内部压力增加作出反应，这种压力增加通常与薄膜电容器的故障有关。由于Mesis®不像BAM设备那样需要外部扩展外壳，因此电容器可以永久安装并连接到刚性母线上而不影响开关的功能。
Unlike capacitors with BAM fuses, Mesis® capacitors do not disconnect themselves from the mains. Instead, the signal from the overpressure protection can be used on site or at a central detection point to immediately disconnect one or more affected capacitors. Particularly in filters, where a change in capacitance has an immediate effect on the resonant circuit and therefore on the filter frequency, the autonomous (and therefore initially unnoticed) disconnection of conventional BAM capacitors would sometimes lead to subsequent reactions due to altered filter behaviour or asymmetries. In contrast, the targeted transmission of a switch-off signal by Mesis® enables immediate corrective measures to be initiated, e.g. shutdown and maintenance.
与带有BAM保险丝的电容器不同，Mesis®电容器不会从主电源断开。相反，过压保护信号可以在现场或中央检测点使用，以立即断开一个或多个受影响的电容器。特别是在滤波器中，电容的变化会立即影响共振电路，从而影响滤波频率，因此传统BAM电容器的自主（最初未被注意）断开有时会导致由于滤波器行为改变或不对称而产生的后续反应。相比之下，Mesis®有针对性地传输关机信号，可以立即启动纠正措施，例如关闭和维护。
Like our filter capacitors in the E62 family, the E68 Mesis® are also tightly sealed with metal cans and lids, providing excellent protection against environmental influences such as moisture and contamination from pollutants. Temporary condensation of these capacitor is therefore permissible. They also pass climatic tests under extreme conditions with 85%RH at 85°C. The sealed housing fulfils the requirements of hazard level HL3 in accordance with railway standard EN 45545 (fire behaviour of materials and components).
与E62系列的滤波电容器一样，E68 Mesis®也采用金属罐和盖子紧密密封，提供了出色的防护，防止湿气和污染物的侵入。因此，这些电容器在短时间内出现凝露是可以接受的。它们还通过了极端条件下（85%湿度，85摄氏度）的气候测试。密封外壳符合铁路标准EN 45545（材料和组件的防火行为）中危险等级HL3的要求。
