GE IS2020SSRKG2 VMIC RACK MPS

Part Number IS2020SSRKG2 Manufacturer General Electric Country of Manufacture As Per GE Manufacturing Policy Series Mark VI/VIe Function Module Availability In StockIS2020SSRKG2 is a VME Rack Main Power Supply developed by GE. It is a part of Mark VI control system. The SSRKG2 stands as a vital component within the Mark VI control system, serving as the VME Rack Main Power Supply developed by GE. Positioned on the right side of the VME control racks and interface, this power supply unit plays a crucial role in ensuring consistent and reliable power distribution within the system. PHYSICAL CONFIGURATION AND CONNECTIVITY Mounting Position: Positioned on the right side of the VME control racks and interface. Connectors: Equipped with two connectors, PSA and PSB, situated along the top edge. These connectors are specifically designed to link with a cable harness, facilitating the transmission of power to the VME rack. Output Specifications: It operates as a 300-watt 24 VDC power supply, featuring three +28V PSA outputs, with a combined 300W output rating.

Additionally, it includes a Status ID output. Redundancy Support: Designed to support redundant operations, ensuring continuous and uninterrupted power supply in critical scenarios. The power supply unit is encased with a faceplate secured by screws at multiple locations. This faceplate design allows for secure closure while providing access to several panels, enabling convenient accessibility for maintenance or inspection purposes. SPEED (PULSE RATE) INPUTS MONITORING The VTUR card oversees four-speed inputs derived from passive magnetic sensors. Additionally, the servo card VSVO manages two-speed inputs (pulse rate), compatible with both passive and active speed sensors. These pulse rate inputs within the VSVO card commonly facilitate flow-divider feedback within servo loops. The frequency range supported for these inputs spans from 2kHz to 14kHz, exhibiting ample sensitivity at 2Hz, enabling the detection of zero speed from a 60-toothed wheel. Furthermore, the Backup Protection Module, divided into three sections, accommodates the monitoring of two additional passive speed sensors.

This function primarily serves emergency overspeed protection for turbines lacking a mechanical overspeed bolt. For data communication and exchange between the Backup Protection Module and the Control Module(s), including cross-tripping capability, IONet serves as the underlying communication protocol. It's important to note that despite the IONet's communication capabilities, both modules retain the ability to independently initiate system trips without relying solely on the IONet interface.

POWER SUPPLY REMOVAL Loosen the PSA/PSB Bracket Captive Fastener: Begin by loosening the captive fastener located at the top front of the PSA/PSB bracket assembly. This fastener secures the bracket to the power supply module (RPSM), and loosening it allows for disassembly. Separate the PSA/PSB Bracket Assembly: Once the captive fastener is loosened, separate the PSA/PSB bracket assembly from the RPSM. This step involves gently pulling the bracket assembly away from the power supply module to create space for further disconnection. Disconnect the Bottom Connectors: With the bracket assembly separated, proceed to disconnect the bottom connectors.

These connectors are typically located at the bottom of the power supply module and are responsible for electrical connections. Loosen the Front Sheet Metal Bracket Captive Fasteners: Next, loosen the captive fasteners securing the front sheet metal bracket. These fasteners are typically located at the front of the power module assembly and hold the bracket in place. Pull the Sheet Metal Bracket/Power Module Assembly Forward: Once the front sheet metal bracket captive fasteners are loosened, carefully pull the sheet metal bracket/power module assembly forward. This movement creates space for accessing the rear side connectors.

Disconnect the Rear Side Connectors: With the assembly pulled forward, proceed to disconnect the four rear side connectors. These connectors are typically located at the rear of the power module assembly and facilitate electrical connections. Slide the Assembly Off of the Control Rack: After disconnecting the rear side connectors, slide the sheet metal bracket/power module assembly off of the control rack. This step involves gently maneuvering the assembly to release it from the rack's mounting points. Remove the Mounting Screws: Finally, locate and remove the four mounting screws that secure the RPSM to the bracket. These screws hold the power supply module in place and must be removed to fully disengage the module from the bracket.