MA-041
–
DGA 900 Plus - Installation & Commissioning Manual - Rev 1.1
4-Mar-22
Page 88 of 99
Figure 10-22: Voltage Measurement
10.4.3
C1% Measurement
To ensure that the configuration is correct for this system:
▪
Select
BMT > Live Measurement
as shown in Figure 10-23 and ensure that the
‘
Expected Current mA
’
for each phase is within 10% of the measured current mA
reading.
Troubleshooting Tip
: If there is a ±40% difference between the expected and
measured C1 values, the likely reason for this is an incorrect ‘Operational Voltage
Format’ (see Section
10.4.1 and check with the customer to confirm Peak to ground
or RMS).
Figure 10-23: Bushing
Note:
R
efer to ‘Section
10: Bushing & PD Monitor
’ in the ‘MA
-040
–
DGA 900 Plus
–
Operator Guide’
for operational guidance on the settings below.
▪
Select
BMT > Configuration
and ensure that the Bushing Profiles Nameplate
nominal values are correct and assigned to the correct bushing.
▪
Select
BMT > General Settings
and ensure that the Primary Operational voltage is
correct.
▪
Select
BMT > Calibration
and ensure that the Bushing Adaptor Calibration Data load
impedance is set correctly for each bushing profile.
