61--MILES CITY CONVERTER THYRISTOR ASSEMBLIES

Form / Attachment / Pricing Sheet

This document provides detailed technical specifications for Miles City HVDC Converter Thyristor assemblies. It is intended to define the performance characteristics and limits for these components, likely for direct replacement or procurement purposes.

• Component Description: Single and double stack thyristor assemblies suitable for phase control of HVDC valves, with a 125mm size and 1.4" ceramic package thickness.
• Ratings: Specified for 5000V/5000A.
• Heatsink Profiles: Mentions matched heatsink profiles for direct replacement, referencing Miles City Eupec single and double stack assemblies.
• Test Parameters: Details various tests including VDM/IDM, VRM/IRM, IGT/VGT, IGTN/VGTN, VTM, Vdcrit, IREC, di/dt, Turn-off Time, and Blocking Stability.
• Conditions: Specifies test conditions such as R.T. (Room Temperature), 105°C, and 145°C, along with specific pulse conditions and bias voltages.
• Limits: Provides the acceptable limits for each test parameter under the specified conditions.

This document is crucial for bidders to understand the exact technical specifications required for the HVDC converter thyristor assemblies. It allows vendors to verify if their proposed products meet or exceed these stringent performance requirements, ensuring compatibility and suitability for the intended application. Bidders must ensure their offerings align with these detailed test parameters and limits to be considered compliant.

Other / Unclassified

This document is a "Brand Name Only/ Single Source Justification" for the Western Area Power Administration (WAPA). It outlines the rationale for restricting competition for the procurement of direct replacement single and double thyristor assemblies for HVDC valve modules at the Miles City HVDC Converter.

This document is relevant to potential bidders as it explains why the procurement is being conducted as a sole source. The thyristor assemblies are integral to a GE-designed power system, and GE is no longer in that business. Southern States is identified as the only manufacturer capable of providing a direct replacement thyristor assembly that meets the specific electrical, heat dissipation, and cooling efficiency requirements for the existing system. The justification cites FAR 12.102(a) as the authority for this sole-source determination, indicating that only genuine brand-name parts will fulfill the government's needs.