7.3.4 Type G Or R Rccbs - Gossen MetraWatt PROFITEST MBASE MTECH Operating Instructions Manual

7.3.4 Type G or R RCCBs

In addition to standard RCCBs and selective RCDs, the special
characteristics of the type G RCCB can also be tested with the
instrument.
The type G RCCB is an Austrian specialty and complies with the
ÖVE/ÖNORM E 8601 device standard. Erroneous tripping is
minimized thanks to its greater current carrying capacity and
short-term delay.
Select the Measuring Function
I
N
Set Parameters – Type G/R (VSK)
Type 1:
Contact voltage and time to trip can be measured in the
G/R-RCD selector switch position.
Note
It must be observed that time to trip for type G RCCBs
may be as long as 1000 ms when measurement is made
at nominal residual current. Set the corresponding limit
value.
Ð Then select 5 x I
in the menu and repeat the tripping test
N
with the positive half-wave at 0° and the negative half-wave at
180°. The longer of the two tripping times is decisive regard-
ing the condition of the tested RCCB.
Set Parameters – Positive or Negative Half-Wave
Waveform:
Negative half-wave
Positive half-wave
Negative direct current
Positive direct current
GMC-I Messtechnik GmbH
Set Parameters – 5 Times Nominal Current
X times tripping current:
5 times tripping current
Note
The following limitations apply when selecting X times
tripping current relative to nominal current:
300 mA: 1 x I , 2 x I
N
500 mA: 1 x I
N
Start Measurement
In both cases, tripping time must be between 10 ms (minimum
delay time for type G RCCBs!) and 40 ms.
Type G RCCBs with other nominal residual current values must
be tested with the corresponding parameter setting under menu
item I . In this case as well, the limit value must be appropriately
N
adjusted.
Note
The parameter setting RCD
suitable for type G RCCBs.
N
G / R
S
for selective RCCBs is not
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