Danfoss DLX 4.6 Guida Utente Scaricare il pdf (Pagina 49)

User Guide DLX Series L00410623-1 49

5.3.2. Voltage Monitoring

First, the overvoltage monitoring is checked. The voltage trip level is ramped down from

the maximum allowed voltage level, 276 V

, and decreased until it equals the current grid

voltage. The time it takes from equalization of the voltage to when the inverter

disconnects from the grid is measured.

AC max

Maximum allowed voltage; trip level

AC off

Disconnection voltage level; equalization

max

Maximum allowed disconnection time

off

ime from equalization to disconnection

PASS

he first sequence is successfully carried out

FAIL

irst sequence has failed – try again later

Second, the undervoltage monitoring is checked. The trip level is ramped up from the

minimum allowed voltage level, 184 V

, and increased until it equals the current grid

voltage. The time it takes from equalization to disconnection is measured.

AC min

Minimum allowed voltage; trip level

AC off

Grid voltage level

max

Maximum allowed disconnection time

off

ime from equalization to disconnection

PASS

he second sequence is successfully carried out

FAIL

he second sequence has failed – try again later

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Danfoss DLX 4.6 Guida Utente Pagina 49