... ,PC grade;AC33B 3.Warranty 18month JATSN-400A Auto and Manual Change Over Switch 0. Standards and CertificatesStandards: IEC60947-6- ... of JATSN-400A Auto and Manual Change Over Switch 2. Performance benefits of JATSN-400A Auto and Manual Change Over Switch 1) Electirc ... transfer, setting of transfer time delay.2) B type realizes manual or automatic transfer, voltage loss, under-voltage, over-voltage and ...