Type G Rccbs - Gossen MetraWatt ProFiTEST C-GB int. Operating Instructions Manual

Trip Test
➭
Press the START key. The RCCB is tripped. The clock appears at the
display, followed by time to trip t
START
Note
Selective RCCBs have a delayed breaking response. Breaking
response is influenced for a brief period (up to 30 s) by pre-loading
during measurement. In order to eliminated pre-loading caused by
the measurement of contact voltage, a pretest waiting period is
required before the trip test can be started. After the measuring
sequence has been started (trip test), a clock appears at the
display.
Time to trip values of up to 1000 ms are permissible.
GMC-I Messtechnik GmbH
and earthing resistance R .
T E

6.4.2 Type G RCCBs

In addition to common selective RCCBs, the special characteristics of the
type G RCCB can also be tested with the PROFiTEST
➭
First set the instrument to the indicated nominal residual current I
➭
Measure contact voltage and time to trip as you would for normal
RCCBs.
➭
Then select 5·I in the TYPE sub-menu and perform the trip test
with the positive half-wave.
Repeat the trip test with the negative half-wave after selecting 5·I
The longer time to trip is decisive regarding the condition of the tested
RCCB.
In both cases, time to trip must lie within a range of 10 ms (minimum delay
time for the type G RCCB!) to 40 ms.
Type G RCCBs with different nominal residual current values must be
tested under menu item I with the function selector switch in the
N
appropriate setting.
Note
Menu selection S for selective RCCBs is not suitable for type G
RCCBs.
®
C test instrument.
.
N
.
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