JUPITER
IT - 24
5.8. TEST ON A AND AC RCDS
This function is performed in compliance with standard IEC/EN61557-6 and allows
measuring the tripping time and the current of the
instant general
RCDs of the system
(see § 9.1). The following operating modes are available:
AUTO
the instrument automatically carries out a sequence of six measurements with a
leakage current equal to half, once or five times the set value of rated current
and with a leakage current in phase with the positive and negative half-wave of
the mains voltage. Recommended mode
x½
the instrument performs measurement with a leakage current equal to half the
set value of rated current
x1
the instrument performs measurement with a leakage current equal to once the
set value of rated current
x5
the instrument performs measurement with a leakage current equal to five times
the set value of rated current
the instrument performs measurement with an increasing leakage current. This
mode is recommended to determine the real tripping current of the RCD.
CAUTION
The maximum input AC voltage is 690V to earth and between inputs. Do
not measure voltages exceeding the limits given in this manual.
Exceeding voltage limits could result in electrical shocks to the user and
damage to the instrument.
Testing the RCDs
’
tripping time causes the RCDs
’
tripping.
Therefore
check
that there are NO users or loads connected downstream of the RCD
being tested which could be damaged by a system downtime.
Disconnect all loads connected downstream of the RCD as they could
produce leakage currents further to those produced by the instrument, thus
invalidating the results of the test.
Fig. 29: Use of the instrument for RCD test on single-phase system with cable provided
with Schuko plug