Taking systems on ISS offline to perform servicing on the Powered Remote Power Controller Module (RPCMs) introduces operational risks. A task was initiated and lead by the NASA Engineering and Safety Center (NESC) to assess the safety of performing on orbit replacement of RPCMs without powering down.

2019年3月21日 · The common circuit protection device on the ISS is the Remote Power Controller (RPC), a commandable "smart circuit breaker". An RPC monitors the current passing through it and opens the circuit if the current exceeds a limit for a specified amount of time.

2021年7月1日 · Onboard ISS, taking systems off-line when powering down to perform servicing on Remote Power Control Modules (RPCMs) introduces operational risk. An investigation lead by the NASA Engineering...

RPCMs are boxes with multiple switches with several different load ratings to route power to user loads. The RPCMs provide remote switching of loads and over-current protection. An RPCM can also feed other RPCMs and can feed Russian power converters, outlet panels, etc.

2014年4月21日 · There are thee tiers of MDMs on the ISS: Tier 1. C&C (Command and Control) MDMs. Three fully redundant MDMs that are always powered on, with one operating as primary. Processes commands sent form MCC-H, provide telemetry to ground based flight controllers, and manage S-band, Ku-band, and other data links. Interface for robotics work station.

The DDCU receives primary power from the DCSU, converts into secondary power and sends it back to Remote Power Controller Modules (RPCMs) (see next section) for distribution. The RPCMs are housed within the DCSU as shown in Figure 3-5.

When major International Space Station (ISS) systems, such as the central active thermal control system, are powered down for a Remote Power Controller Module (RPCM) removal and replacement (R&R) there is operational risk both during the powered down duration and when bringing the system back on line.

Secondary power distribution assemblies (SPDAs) [2] - consist of remote power controller modules (RPCMs), power and data connections (central utility rail), and a cold plate. They control, protect, and isolate secondary distribution lines. RPCMs are electronic switches that control, protect, and isolate secondary distribution lines.

Onboard ISS, taking systems off-line when powering down to perform servicing on Remote Power Control Modules (RPCMs) introduces operational risk. An investigation lead by the NASA Engineering and Safety Center (NESC) was performed by a multi-center team to assess the safety of performing on-orbit replacement of RPCMs without powering down.

Onboard ISS, taking systems off-line when powering down to perform servicing on Remote Power Control Modules (RPCMs) introduces operational risk. An investigation lead by the NASA Engineering...