ABB SR91C790 1MRK002239-BBR01 Power Supply Module

Description

The 1MRK002239-BBR01 is an internal hardware power supply module (PSM) engineered to supply stable, low-noise DC power rails across the backplane layout of protective relays. This 1MRK002239-BBR01 switching power supply module accepts a high-voltage input spectrum ranging from 90 to 250 VDC, converting the bulk raw utility or substation battery source into regulated voltage steps required by downstream processing elements, binary I/O boards, and analog input sampling cards. Built for high-availability substation automation networks, the module features robust electrical isolation, high-frequency line filters, and internal energy storage capabilities to ensure uninterrupted protective relaying logic and control functionality during brief network voltage sags or source transitions.

Regarding technical nomenclature, the specific designation 1MRK002239-BBR01 represents the spare part assembly kit version or commercial packaging index of the core product ID 1MRK002239-BB. Both codes reference identical hardware architecture, electrical parameters, environmental ratings, and physical chassis footprint dimensions.

Features

• Wide high-voltage auxiliary input range accommodating 90 to 250 VDC substation battery networks.
• Strict electromagnetic compatibility (EMC) attenuation preventing high-frequency noise infiltration into logic cards.
• Slide-in board architecture for precise mechanical slot mating inside compatible protection terminal chassis.
• Regulated low-voltage internal DC bus outputs providing power to multi-channel processor modules.

Applications

• System auxiliary power infrastructure for 650 series protection and control IED racks.
• Power supply subsystems for RET650 transformer protection terminals.
• Modular power management inside integrated substation automation bay control arrays.

Technical Specifications

Installation Guidelines

• Slot Verification: Identify the precise hardware slot designation allocated for the Power Supply Module (PSM) within the specific protection IED rack manual prior to mechanical mounting.
• Source Isolation: Ensure the external 90-250 VDC input distribution line breaker is completely disengaged, locked out, and tagged before introducing the component to the chassis rack.
• Mechanical Alignment: Slide the printed circuit board assembly carefully along the internal card rails until the rear multi-pin connector seats firmly into the passive backplane. Fully hand-tighten the front faceplate retention screws.
• Chassis Earthing: Verify the master IED enclosure maintains a low-impedance substation ground connection to ensure integrated transient filters operate efficiently.
• Termination Security: Tighten all auxiliary supply wire connections to the designated terminal block specification to minimize connection resistance and prevent localized thermal stress.