Raytech mini-ATOS Instruction Manual page 53

Rated Voltages Wizard
In the Rated Voltages Wizard, there are two calculation methods:
First/Last method
Figure 32: Rated Voltage Wizard, First/Last method
In this method, we have to enter the first tap and the last tap Ph-Ph nominal voltage. Figure 32
shows how to fill the form for the secondary side of the example.
Some transformers have tap changer changeover with more than one tap with the same voltage in
the middle. In such cases, the number of changeover positions with the same voltage has to be
also entered.
To match the calculated values to nameplate values, it is also possible to say the wizard how to
round the calculated values. The default value is 1, which means that all calculated values round to
the nearest natural number.
Preliminary
90297-0.24 Instruction Manual mini-ATOS Page 53 of 125