Sices D-PRO, Техническое руководство

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D-PRO Protection relay Technical Manual 33
(1) See diagram 27T - Time-dependent minimum voltage.
This protection can be used individually or together with 27, having another intervention
threshold when at least one of the genset voltages decreases below the threshold set in
P.0321 (percentage of P.0102) for the time configured in P.0322.
(2) See diagram 27 + 27T - Time-dependent minimum voltage combined with minimum
voltage.
Type: Alarm
Related parameters: P.0380 Maximum active power threshold (% compared with P.0106)
P.0381 Maximum active power delay
To disable: P.0381 =0
The protection is enabled only in case of absence of the disabling digital input (usually
combined to the circuit breaker status).
(1) - Diagram
27T
P.0326
Genset voltage
In
te
rv
e
n
tio
n
t
im
e
(2) - Diagram
27 + 27T
P.0322
P.0321
P.0326
Genset voltage
In
te
rv
e
n
tio
n
t
im
e