industry news
Subscribe Now

Vacuum Interrupters Introduces RVI-WL-23338 Replacement Vacuum Interrupter for Westinghouse R-4 Vacuum Circuit Breakers

Vacuum Interrupters, a leading manufacturer of replacement vacuum interrupters, pole assemblies, parts, and components for medium-voltage vacuum circuit breakers and contactors, introduces the RVI-WL-23338 replacement vacuum interrupter.

This direct fit-and-function replacement unit for Westinghouse WL-23338 vacuum interrupters meets original equipment ratings and is intended for use in Westinghouse R-4 vacuum circuit breakers. The RVI-WL-23338 offers 2000 A RMS-rated current, 15.5 kV RMS maximum voltage, 110 kV peak impulse withstand, and 25 kA short-circuit breaking current.

The replacement vacuum interrupter features Cu-Cr contacts for excellent high-voltage insulation and breaking performance, fine alumina ceramic construction for superior vacuum seal integrity, and exclusive internal torsion control for reliable operation.

Standard features include impulse testing and AC withstand testing to ANSI C37 standards and high cumulative and breaking capacity performance. Each unit undergoes stringent testing protocols to ensure high reliability and comes with a full one-year warranty.

Comprehensive Testing

The MAC-TS4 vacuum interrupter test set uses patented magnetron atmospheric condition (MAC) testing to evaluate vacuum interrupters in the field, shop, or laboratory. MAC testing goes beyond pass/fail results with trendable lifecycle data for each vacuum interrupter, preventing unnecessary downtime and damage to vacuum circuit breakers and contactors.

The RVI-WL-23338 is available immediately from Vacuum Interrupters. For more information about replacement vacuum interrupters and testing services, click here or call 214-442-5877.

About Vacuum Interrupters
Vacuum Interrupters, developer of the magnetron atmospheric condition
vacuum interrupter test set (MAC-TS4), the CBT-1203 circuit breaker timer, and the VITS60M vacuum integrity tester, provides replacement vacuum interrupters, pole assemblies, and components for virtually all medium-voltage vacuum circuit breakers and vacuum contactors. It also offers a high voltage test lab and has SF6 interrupter rebuild/replacement capabilities.

Leave a Reply

featured blogs
May 6, 2026
Hollywood has struck gold with The Lord of the Rings and Dune'”so which sci-fi and fantasy books should filmmakers tackle next?...

featured paper

Quickly and accurately identify inter-domain leakage issues in IC designs

Sponsored by Siemens Digital Industries Software

Power domain leakage is a major IC reliability issue, often missed by traditional tools. This white paper describes challenges of identifying leakage, types of false results, and presents Siemens EDA’s Insight Analyzer. The tool proactively finds true leakage paths, filters out false positives, and helps circuit designers quickly fix risks—enabling more robust, reliable chip designs. With detailed, context-aware analysis, designers save time and improve silicon quality.

Click to read more

featured chalk talk

Analog Output, Isolated Current, & Voltage Sensing Using Isolation Amplifiers
Sponsored by Mouser Electronics and Vishay
In this episode of Chalk Talk, Simon Goodwin from Vishay and Amelia Dalton chat about analog output, and isolated current and voltage sensing using isolation amplifiers. Simon and Amelia also explore the fundamental principles of current and voltage sensing and the variety of voltage and current sensing solutions offered by Vishay that can get your next design up and running in no time.
Apr 27, 2026
15,620 views