 |
| Russian | English |
| коэффициент первичной энергии | primary energy coefficient (25banderlog) |
| первичная энергетика | primary energy production (igisheva) |
| первичное регулирование частоты | primary frequency control (MichaelBurov) |
| резерв первичного регулирования частоты | primary frequency reserve (Therefore a closer operation to the maximum efficiency point can be realized while the whole primary frequency response reserve is being preserved.  so-ups.ru rafail) |