Je4C3151测二次回路的绝缘应使用多大的兆欧表?其绝缘电阻的标准是多少?
["\u7b54\uff1a\u6d4b\u4e8c\u6b21\u56de\u8def\u7684\u7edd\u7f18\u7535\u963b\u6700\u597d\u4f7f\u7528LkV\u5146\u6b27\u8868\uff0c\u5982\u679c\u6ca1\u6709LkV\u7684\u4e5f\u53ef\u4ee5\u7528500V\u5146\u6b27\u8868\u3002\u7edd\u7f18\u7535\u963b\u7684\u6807\u51c6\u662f\uff1a\u8fd0\u884c\u4e2d\u7684\u7edd\u7f18\u7535\u963b\u4e0d\u5e94\u4f4e\u4e8e1M\u03a9\uff0c\u65b0\u6295\u5165\u7684\u5ba4\u5185\u7edd\u7f18\u7535\u963b\u4e0d\u4f4e\u4e8e20M\u03a9\uff0c\u5ba4\u5916\u7edd\u7f18\u7535\u963b\u4e0d\u4f4e\u4e8e10M\u03a9\u3002"]