... if over 100A, meters can be contacted current transformer with secondary current 5A or 1A 96, 72 ... , if over 600V, meters can be connected potential transformer with secondary voltage 100V 96 Moving Coil instrument ... over 15A, meters can be contacted external current transformer, which secondary current is 5A or 1A 96 ... over 600V, meters can be connected potential transformer with secondary voltage 100V