We specialize in Current Sensors, CT Sensors, and Measuring Instruments.

Io/Ior Leakage Clamp Meter

MCL-400IR+ Digital Ior Leakage Current Clamp TesterIor AC Leakage Clamp Meter φ40mm

Ior Leakage Current


・About Ior Leakage Current
Recently, the leakage current clamp meter is widely used for insulation control of low voltage circuit as the supplementary method of the insulation resistance measurement. The control of leakage current has the advantages to enable the prediction of insulation condition in the electrical power line without having to shut off the power. The leakage current (Io) includes the capacitive leakage current (Ioc)originated in the capacitance and the resistive leakage current (Ior) originated in the insulation resistance each related to the ground. It is considered that the measurement of resistive leakage current (Ior) is the very useful and effective method for the insulation control of low voltage circuit. However, it was difficult to measure the resistive leakage current (Ior)with traditional leakage current clamp meter. MCL-400IR new digital clamp tester enabled the measurements of the resistive leakage current (Ior)without voltage input(phase detection).
Measuring method Dual slope integration mode
Display 3.5 digit LCD, max. reading of 4000
Measuring ranges AC 0-40mA, 400mA, 4A, 40A, 300A,
AC 0~500V
Accuracy 23℃±5℃ 80%RH or less (50/60Hz)
AC Current/40mA/0.01mA/±1.0%rdg±8dgt
AC Current/400mA/0.1mA/±1.0%rdg±8dgt
AC Current/4A/0.001A/±1.0%rdg±8dgt
AC Current/40A/0.01A/±1.0%rdg±8dgt
AC Current/300A/0.1A/±1.0%rdg±1%FS
AC Voltage/500V/0.1V/±1.0%rdg±8dgt
Accuracy for Harmonics Current and Voltage Fundamental, 3rd, 5th, 7th : 1%rdg±5dgt±AC current and voltage accuracy
11th and 13th Harmonics : 2%rdg±5dgt±AC current and voltage accuracy
(Min. fundamental input current : more than 2% of each current)
AC Conversion Average sensing rms reading
Input Frequency 45-65Hz
Influence of external magnetic field Less than 5mA (nearby 100A conductor)
Inside diameter of CT φ40mm
Withstanding voltage AC 2200V/1 minute
Limitation of circuit voltage Less than AC 500V
Over range indication "OL" mark on LCD
Data hold indication "DH" mark on LCD
Low battery indication "Battery" icon on LCD
Sampling rate 2 times/sec
Operating temperature 0~40℃, < 80%RH (without condensation)
Storage temperature -10~60℃, < 70%RH (without condensation)
Power supply 1.5V ("AAA" sixe, um-4)x3
Dimension 70(W)×223(H)×34(D)mm
Weight Approx. 440g
Accessories Carrying case, Batteries, Test lead, Instruction manual