KYORITSU 5410 - Manual (Page 20)

● Earth – Line
Connect the “PRIMARY” of the Connector Block to Earth, and the
“SECONDARY” of the Connector Block to Line of the load of RCD.
DANGER
Extra caution should be taken when applying current to EARTH for
tests since the other RCDs (see Fig.10) may operate and damage the
devices connected to the instrument and cause accidents.
8-5 Operating time
Tripping time is the time needed by the RCD to trip at a rated residual
operating current of IΔn. The standard values of tripping time are defined
by IEC 61009 and IEC 61008 are listed in the table below for IΔn and
5IΔn.
Type of RCD IΔn(x1) 5IΔn(x5)
General(G) 300ms
max allowed value
40ms
max allowed value
500ms
max allowed value
150ms
max allowed value
Selective(S)
130ms
min allowed value
50ms
min allowed value
KEW 5410
Leakage
LINE
NEUTRAL
EARTH
RCD(A)
RCD(B)
Leakage currents may flow to RCD (A),
which is installed in the power supply of the
RCD (B) under test, when current flows to
the EARTH; so RCD (A) may trip as well.
current
Connection using Earth
POWER
RED
LOAD
Test lead with
alligator clip
Fig.9
Fig.10