KYORITSU 5406A - Manual (Page 12)

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● RCD type S = Selective type (with trip out time-delay), this RCD is
specially designed for electrical installation where the selectivity
characteristic is necessary.
In order to assure successful protection on an electrical installation using
RCD's, they should be checked testing:
● Trip out time t⊿
● And in some cases also the Tripping current I⊿.
Trip out time t⊿ is time needed by the RCD to trip at rated residual operative
current I⊿N. Typically RCD rated residual operative currents I⊿n are:
10mA, 20mA, 30mA, 200mA, 300mA, 500mA
The standard values of tripping time defined by IEC 61009 (EN61009) and
IEC 61008 (EN 61008) are listed in the table below (for I⊿n and 5I⊿n):
This tripping time values are concerning the RCD's correctly mounted
following the manufacturer's specifications.
The RCD tester Model 5406A continues driving test current until RCD trips
or up to max test time.
This test is named Trip test (×1 I⊿n) or Fast trip test (×5I⊿n).
NOTE:
There are special protection devices called "Adjusted RCD" where the
tripping time and tripping current are adjustable, in these cases the above
table should not be considered.
Type of RCD
General (G)
Selective (S)
I⊿n
300ms
max. allowed value
500ms
max. allowed value
130ms
min. allowed value
5I⊿n
40ms
max. allowed value
150ms
max. allowed value
50ms
min. allowed value