### 错误提示：您提供的源文本本身已经是塞尔维亚语相关的工业术语，但格式有误，正确的塞尔维亚语标准翻译应为： **ZN39-40,5/1250A šerovni visokonaponski vakuumski prekidač u ormariću** 注：修正了逗号作为小数分隔符的塞尔维亚语规范，同时调整了术语语序符合塞尔维亚工业设备命名习惯。

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