Special Tests For Systems And Rccbs; Testing Systems And Rccbs With Rising Residual Current - Gossen MetraWatt ProFiTEST C-GB int. Operating Instructions Manual

6.3

Special Tests for Systems and RCCBs

6.3.1 Testing Systems and RCCBs with Rising Residual Current

Measuring Method
The instrument generates a continuously rising residual current I
0.3 to 1.3) within the system for RCD testing.
The contact voltage and tripping current values which prevail at the
moment the RCCB is tripped are stored to memory and displayed by the
instrument.
The operator can select between two different contact voltages,
U = 25 V or U = 50 V, for measurement with rising residual current.
L L
Connection
R
F
22
Measuring Sequence
(from
N
➭
➭
L1
➭
L2
L3
➭
N
After the measuring sequence has been started, test current generated by
PE
the instrument rises starting at a value of 0.3 nominal residual current until
the RCCB is tripped. This can be observed at the sine symbol. Tripping
current I
If contact voltage reaches the selected limit value (U
before the RCCB is tripped, safety shutdown ensues. The U
up red.
If the RCCB is not tripped before the rising current reaches nominal
residual current I
Select measurement with rising residual current with the I
Set nominal residual current for the utilized RCCB with the IN key.
If the contact voltage limit value deviates from 50 V, or if a selective
RCCB is involved, the corresponding value must first be selected by
activating the TYPE key.
Start the measurement with the START key.
is displayed at the LCD.

, the RCD/FI lamp lights up red.
N
START
key.

= 50 V or 25 V)
L
lamp lights
L
GMC-I Messtechnik GmbH