High Voltage, INC
High Voltage, Inc. designs and manufactures high voltage test equipment used for proof testing, diagnostic testing, high voltage breakdown testing, and preventative maintenance testing. The company produces VLF AC technology test sets, AC dielectric test sets, DC hipots-megohmmeters, oil dielectric test sets, cable fault locators, aerial lift testers, HV AC/DC dividers, neutral resistance testers, and OEM HV supplies. The equipment serves industries including cable testing, motor generator testing, apparatus testing, and component/production testing.
Their plant
| Facility | City | State | Employees | Status |
|---|---|---|---|---|
| High Voltage, INC | Copake | NY | 20–99 | ACTIVE |
Compiled from federal records — EPA, OSHA, SAM.gov and the U.S. Census — and from the company’s own website. Federal source data is public domain. Each plant’s page names the source of every field.


