MarelliMotori MEC-100 Manuel De L'utilisateur page 95

5.7.9. Diode Monitoring
In Fig. 5.7.9.a the diode monitoring parameters configuration area is shown.
Low Level (see Par. 3.6.7):
❑
Maximum Ripple (%): enter in this field the maximum allowed excitation current ripple related to the following Time Delay,
and expressed in percentage with respect to the generator rated excitation current value (0 to 100%, with minimum
increase of 1%).
❑
Delay (s): enter in this field the time interval value during which the MEC-100 is authorized to work at/over Maximum
Ripple, before the activation of the relevant protection (0 to 100s, with minimum increase of 1s).
High Level (see Par. 3.6.7):
❑
Maximum Ripple (%): enter in this field the maximum allowed excitation current ripple related to the following Time Delay,
and expressed in percentage with respect to the generator rated excitation current value (0 to 100%, with minimum
increase of 1%).
❑
Delay (s): enter in this field the time interval value during which the MEC-100 is authorized to work at/over Maximum
Ripple, before the activation of the relevant protection (0 to 10s, with minimum increase of 1s).
Protection Options (see Par. 3.6.7):

Enable Monitoring: protection activation flag; click on this button to activate the diode monitoring function.

Enable Shutdown: shutdown activation flag; click on this button to activate the shutdown option for High Level monitoring.
SHUTDOWN OPTION CAN BE USED ONLY ASSOCIATED TO HIGH LEVEL OF FAILURE.
Low Level can be only associated to external annunciation.
Alarm Options (see Par. 3.6.7):
High Level:

Apply to Relay 1: relay 1 assignment flag; click on this button to assign the protection intervention signal to relay 1.

Apply to Relay 2: relay 2 assignment flag; click on this button to assign the protection intervention signal to relay 2.
Low Level:

Apply to Relay 1: relay 1 assignment flag; click on this button to assign the protection intervention signal to relay 1.

Apply to Relay 2: relay 2 assignment flag; click on this button to assign the protection intervention signal to relay 2.
BY DEFAULT, PROTECTIONS ARE INITIALLY DISABLED. Pay particular attention, when configuring the MEC-
100, to the activation of all concerned protections
963857137_M
Fig. 5.7.9.a
Diode Monitoring Parameter Area
MEC-100 – Marelli Motori
95