For distribution of bus power to spacecraft equipments an Equipment Power Distribution (EPD) Module is available. The module provides sixteen Latching Current Limiters (LCL) that can be configured to individual load current classes. Each switch function can be commanded on / off via a dual command & monitoring bus, distributed by a backplane interface. Each switch provides telemetry of switch status and load current. Each LCL can be configured to load classes in the range from 0.5 to 5 ampere. Two or more LCL’s can be operated in parallel for higher load current classes. In case of overload or short circuit, the output current is instantly limited to protect the upstream main power bus. When exceeding a predefined delay the LCL will automatically switch off. The voltage drop for each switch function is compatible with requirements for a regulated 28 or 50 volt bus.
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Last updated: 2020-04-25