The transformer that blew up Saturday in Heredia was not one of the white cylinders found on a utility pole. This was a 138,000-volt device at the San Miguel substation in Santo Domingo de Heredia. The Instituto Costarricense de Electricidad said that repairs would cost 81 million colons, about $153,000.
The outage involved customers of the Compañía Nacional de Fuerza y Luz and those of Empresa de Servicios Públicos de Heredia. Service was out from about 7 p.m. Saturday until 1:30 a.m. Sunday, the state power company said.
The explosion damaged other parts of the substation, and repairs will be completed in about two weeks, estimated the Instituto Costarricense de Electricidad.