DCM305E Earth Leakage Clamp Meter Ian Bensted Applications Engineer ian.bensted@megger.com

DCM305E Earth Leakage Clamp 0.001 mA resolution Up to 100 A AC TRMS reading Low pass filter to aid stability of readings Auto, data & peak hold Compare feature 40 mm jaw Auto back light Auto power off (switchable)

DCM305E TRMS Current Ranges 6 mA, 60 mA, 600 mA, 6 A, 60 A, 100 A (AC) Manual or Auto ranging 0.001 mA resolution (6 mA range) TRMS meters allow accurate measurements on both pure, undistorted, sinusoidal AC waveforms and non-sinusoidal AC waveforms which can contain triangles, pulse trains and other ragged waves

DCM305E Power On / Battery Check Display of battery condition at switch on Full battery = 100 % Battery replacement = 1 % Power On

DCM305E Display Hold Features Data Hold Freezes display readings Auto Hold Automatically freezes display readings Peak Hold Maintains highest current reading Hold Selection

DCM305E Low Pass Filter Wide response (all frequencies) 50-60 Hz response (low pass filter) Low pass filters pass frequencies lower than cut-off frequency and attenuate frequencies above the cut-off frequency Filters out high frequency harmonics to enable stable measurements Cut-off frequency 100 Hz Attenuation characteristic -24 dB / octave Cut-off frequency Mains Supply Frequency Unwanted (Harmonic) Frequencies Frequency

DCM305E Compare feature Selectable limit values 0.25 mA, 0.5 mA, 3.5 mA Clamp compares measured current with chosen limit value Buzzer activates and display flashes when limit exceeded Compare Feature Compare Limit Selection

DCM305E Range Selection Autorange 6 mA, 60 mA, 600 mA, 6 A, 60 A, 100 A (AC) Manual Range Selection

DCM305E Auto Back Light Auto backlight sensor illuminates display automatically in very poorly illuminated locations Backlight Sensor

DCM305E Single Phase Earth Leakage Phase & Neutral conductors Phase Neutral

DCM305E 3 Phase Earth Leakage 3 Phase conductors L1 L2 L3

DCM305E 3 Phase + Neutral Earth Leakage 3 Phase & Neutral conductors L1 L2 L3 N

DCM305E Earth Conductor Earth Leakage Will only measure leakage in earth conductor not entire installation Earth / Ground Conductor

DCM305E Load Current Phase conductor only Neutral Phase

Questions? Power on At Megger, we understand that keeping the power on is essential for the success of your business. That is why we are dedicated to creating, designing and manufacturing safe, reliable, easy-to-use portable test equipment backed by world-leading support and expertise. We can assist your acceptance, commissioning and maintenance testing for predictive, diagnostic or routine purposes. By working closely with electrical utilities, standards bodies and technical institutions, we contribute to the dependability and advancement of the electrical supply industry.