Electric power adjustment in glass furnace with varivolt transformer

Use of electric power increases in glass melting. There are several technologies available to adjust electric power delivery in glass melters: off-load or on-load transformers, SCR (Silicon Carbide Rectifiers) or IVR (Induction voltage regulators) and VARIVOLT. BERNARD BONNEFOND founded in 1925 in France is the only manufacturer of VARIVOLT in the world. Since 1968, more than 1700 VARIVOLT have been delivered, and more than 1300 are used in glass industry. Every year BERNARD BONNEFOND manufactures between 70 and 90 VARIVOLT, of which 80% are sold to glass producers and glass engineering companies. © 2021 The American Ceramic Society. Published 2021 by John Wiley & Sons, Inc.