ZC25型、ZC11型絕緣電阻表由手搖發(fā)電機(jī)磁電式及磁電式雙動(dòng)圈流比計(jì)組成，而ZC7型由手搖交流發(fā)電機(jī)及整流系統(tǒng)，磁電系流比計(jì)組成。ZC29B型和ZC8型是根據(jù)電位計(jì)原理設(shè)計(jì)，由手搖交流發(fā)電機(jī)，相敏整流放大器、電位器、電流互感器及檢流計(jì)構(gòu)成。三、型號(hào)及量程ZC25-1100V100M ZC25-2250V250M ZC25-3500V500M ZC25-41000V1000M ZC11-102500V2500M ZC11-1100V500M ZC11-2250V1000M ZC11-3500V2000M ZC11-41000V5000M ZC11-52500V10000M ZC11-6100V20M ZC11-7250V50M ZC11-8500V100M ZC11-950V200M ZC7-1500V500M ZC7-21000V1000M ZC7-32500V2500M ZC7-42500V5000M 接地電阻測(cè)試儀ZC8-10-10-100-1000 ZC8-20-1-10-100 ZC29B-10-10-100-1000 ZC29B-20-1-10-100