... the current, voltage, frequency, active& reactive power. PANEL METER Instrumentation Meter The panel metercan measure the current, voltage, frequency, active& ... specified by the manufacturer, the protection provided by the meter may be impaired.Accuracy class:AC, DC Voltmeters and ... class 3.0.The power factor meters and synchroscope meter comply with accuracy class 2.5. Insulation test:Mounting ...