Go Taps - Raytech mini-ATOS Instruction Manual

11 Go Taps

With go taps, it is possible to perform winding resistance or turns ratio of taps and phases in a
sequence of measurements. This helps to measure faster and easier.
To use this option, in the measuring screen and beside the run button, select Go Taps from the list
of test modes. When you run the test, the Go Taps menu will be first opened as Figure 95. After
adjusting the desired parameters, you can start the measurement by using the play icon on the top
right of the window.
Figure 95: Go Taps menu for turns ratio
Phase
Here, you can select which phase to test. It is possible to test only one phase (e.g. A, B or C), or to
test all three phases (ABC) at each tap position. For winding resistance measurement, there is
ABC,CBA,ABC,... item which is the optimized three phase version which save time in charge and
discharge.
Direction
The tap changing direction should be selected here. You can select either the direction to the first
tap or to the last tap.
Tap Changing: Automatic
For automatic tap changing, the mini-ATOS tap control output must be connected to the tap
changer control unit for both directions. In the transformer profile, Tap Changer tab, the tap control
must be also activated.
During the automatic tap changing, the tap switch window will be shown like Figure 96. In the
automatic tap switch window, there is a countdown timer. The system actually waits, so the tap
changer has time to change the tap position to the next tap. The waiting period is according to the
maximum transition time which was set in the test object profile (Please see chapter 8.1.5). After
the waiting period, system performs the next measurement.
Preliminary
90297-0.24 Instruction Manual mini-ATOS Page 105 of 125