首页>
外国专利>
Device for jam of voltage transformers on their fasttranslator - and angular errors by comparison with normal wall learn, in which an auxiliary voltage is switched on secondary which, according to magnitude and phase vera is sufficient
Device for jam of voltage transformers on their fasttranslator - and angular errors by comparison with normal wall learn, in which an auxiliary voltage is switched on secondary which, according to magnitude and phase vera is sufficient