VT primary and secondary voltages must match with the connected voltage transformer in addition to
the voltage measurement mode. These settings are then used for scaling the voltage channel input
voltages to primary and per unit values as well as power and energy measurement values if current
measurements are also available.
Frequency
Figure. 4.7 - 44. Frequency submenu.
Frequency measurements use the fixed sampling mode as the default, and "System nominal
frequency" should be set to the desired level. When "Sampling mode" is set to "Tracking", the device
uses the measured frequency value as the system nominal frequency. There are three frequency
reference channels: f Ref1, fRef2 and fRef3. With these parameters it is possible to set up three voltage
or current channels to be used for frequency sampling. Parameter "f.meas in use" indicates which of
the three channels are used for sampling if any.
A
AQ
Q-T215
-T215
Instruction manual
Version: 2.04
43
