D52-2042 DIN RAIL Voltmeter Ammeter AC80-300V AC0.1-99.9A Digital AC Voltmeter Voltage Current Meter Led display electric meter Power consumption <0.2VA Range of voltage AC80-300V , AC200-450V Accuracy of voltage 1%+ 2digital Range of current AC0.2-99.9A Active power 0-30000W ( when the voltage AC80-300v) 0-45000W ( when the voltage AC200-450v) Dimension (w)54 x (H)80 x (D)64mm Display Dual LED Display Operating Temperature -10c~ 50c Humidity 2080% Weight 95g /pc D52-2042-rail digital display AC voltage, current Three display table are displayed simultaneously measured AC voltage and AC current PF Active Power on the instrument. The ordered instrument measuring current range within 99.9A no external AC transformer. Simply measuring circuit wires through the small hole on the right side of the instrument can be completed current measurements. Or buy 99.9A external transformer. Applicable to all power distribution equipment table (such as distribution cabinet / household distribution box / appliance repair, etc. especially at home [DZ47 / C45 / air switch] to change the total lines installed by instrumentation, real-time monitoring of home appliances in use (voltage * current = power, thereby calculate the current use of all electrical power is also convenient when you go out to see if there is a large current show, has avoided forget to turn off household appliances when you go out to run some power, thus wasting electricity and resources ) Now home appliances and more, when you see the current meter big, you can selectively shut down a running appliances to avoid overheating the circuit wires to aging wiring and cause air switch trip, the passage of time can cause leakage fires inside and so on.