Feature and application: ZC-7 Megger is suitable for measuring a variety of transformers, motors, cables, electrical equipment and insulation materials insulation resistance. Main Specification Specification effective range accuracy class nominal voltage Upper range limit 100V 500MΩ 0.5~20MΩ 10 200MΩ 0.5~20MΩ 100MΩ 0.5~20MΩ 250V 1000MΩ 1~50MΩ 10 500MΩ 1~50MΩ 250MΩ 0.5~20MΩ 500V 2000MΩ 2~100MΩ 10 1000MΩ 2~100MΩ 500MΩ 1~50MΩ 1000V 5000MΩ 5~200MΩ 10 2000MΩ 5~200MΩ 1000MΩ 2~100MΩ 2500V 10000MΩ 10~500MΩ 20 5000MΩ 10~500MΩ 2500MΩ 5~200MΩ 5000V 10000MΩ 50~2000MΩ 20 5000MΩ 50~2000MΩ