ASTM F1669M船上电气系统绝缘监控器规格（米制）
日期:2012-02-08 13:40
devices.
1.1.1 Type I is an ac device intended as a permanently installed unit for use in the detection of ohmic insulation faults to ground in active ac ungrounded electrical systems up to 1000 VAC, having dc components up to 1500 VDC.
1.1.2 Type II is a dc device intended as a permanently installed unit for use in the detection of ohmic insulation faults to ground in dc ungrounded electrical systems up to 1500 VDC.
1.2 Limitations - This specification does not cover devices that are intende
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