GW Instek GLC-9000 User Manual - Manual (Page 24)

GLC-9000 User Manual
24
Leakage Current Modes
Definition As illustrated below, the leakage current generated
with a high voltage in an electrical appliance
requires measurement under normal EUT
(Equipment Under Test) conditions and under
single fault conditions. Leakage current can be
categorized into 3 types: Electric current that flows
through the body of someone who touches the
equipment, the current that flows through a
protective grounding wire to earth and the current
that flows through a human body connected to an
applied part.
Leakage current can be composed of either
conduction current that flows thru insulation
resistance, or displacement current that flows thru
distributed capacitance.
Earth Leakage
Current
Earth Leakage Current
EUT
Description Earth Leakage Current Tests measure the current
that flows from a protective grounding wire
through a human body to earth.
Class I equipment requires the protective
grounding wire to be disconnected under single
fault conditions.