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Starting of RCD Test
5.2.1
Information regarding RCD testing
The instrument TELARIS RCD Analyzer allows the
measurement of trip times for standard RCDs and
selective RCDs for different residual currents. Ad-
ditionally, the ground resistance and the contact
voltage can be measured without RCD tripping. The
additional ramp function allows determination of
the exact residual current and trip time. The instru-
ment is equipped with an automatic RCD function
to carry out fully automatic RCD tests.
Table 1 and 2 informs about the type of cur-
rent to be selected and about multiplication fac-
tors of nominal residual current.The multipli-
cation factors may not be selected within all
measurement functions and are in these cases
disabled for the user.
The nominal residual current selection also al-
lows selection of selective RCDs (not possible
for RCD TEST I∆/ta/UB). When selecting the
selective RCD, the symbol "S" (7) appears on
the display.
To carry out a complete socket test, the contact
electrode PE (21) must be touched. If the sym-
bol socket error (4) appears, a PE error is pre-
sent.
I∆N:
If the instrument is switched off using function
selection switch or if the instrument automati-
cally switches off due to the automatic power
off function, the pre-set nominal residual cur-
rent value is maintained. Parameters such as
phase position (0°, 180°), current type (AC, DC
Plus, DC) and the nominal residual current
multiplication factor are reset to the standard
(default) values (0°, AC, x1).
10
If many measurements are carried out inter-
rupted only by short breaks, the built-in over-
temperature protection of the RCD Analyzer
might respond, and the thermometer symbol
(15) appears on the display. Subsequent mea-
surements can only be carried out, once the in-
strument has cooled down and the thermome-
ter symbol has gone out, thus avoiding any
instrument damage. Any tests at nominal resi-
dual currents 10mA / 30mA may be started
even if the thermometer symbol is on, as these
currents do not lead to a heating up of the in-
strument.
I∆N:
If the RCD trips during testing, the socket error
symbol (4) is displayed. This symbol is also
displayed if the RCD is not in order and an in-
correct tripping has been caused!
I∆N:
The "Attention Symbol" indicates that one measure-
ment unit has exceeded a limit value. When calling
up the measurement data using "Display" key (18),
the "Limit" symbol (2) or "UB>UL" (3) appears for
the respective measurement unit.
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