Waltham-based Excelitas Technologies said Wednesday that it has acquired Kaiser Systems Inc., a privately held Beverly company that designs and manufactures high-voltage power systems.

Terms of the transaction are not being disclosed.

“The addition of Kaiser Systems expands Excelitas’ presence in medical, industrial, and safety and security markets and broadens our portfolio of high-performance, high-reliability power products,” Excelitas Technologies chief executive David Nislick said in a statement.

Kaiser has 62 employees, and Excelitas Technologies has about 3,000 in various countries in North America, Europe, and Asia, its press release said.

Excelitas Technologies products range from medical lighting to analytical instrumentation, clinical diagnostics, industrial, safety and security, and aerospace and defense applications. The company reported 2011 revenues of $325 million.

According to its website, Excelitas Technologies is owned by Veritas Capital, a private equity firm headquartered in New York City.