MarelliMotori MEC-100 Manual De Instrucciones página 93


Enable Protection: protection activation flag; click on this button to activate the generator over-voltage protection function.

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.
Generator Undervoltage (see Par. 3.6.4):

Voltage Threshold (%): enter in this field the minimum generator voltage level value which corresponds to the activation of
the relevant protection. It is expressed in percentage with respect to the generator rated voltage value (0 to 100%, with
minimum increase of 1%).

Time Delay (s): enter in this field the time interval value during which the MEC-100 is authorized to supply a voltage lower
than or equal to the Voltage Threshold value, before the activation of the relevant protection (0 to 300s, with minimum
increase of 1s).

Enable Protection: protection activation flag; click on this button to activate the generator under-voltage protection function.

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.
Loss of Sensing (see Par. 3.6.6):
 Shutdown/FCR: protection type selection. If Shutdown is selected, an instantaneous de-excitation of the generator will be
operated when the loss of sensing occurs, if FCR is selected, an instantaneous switch to FCR Mode will be operated when
the loss of sensing occurs.

Enable Protection: protection activation flag; click on this button to activate the loss of sensing protection function.

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.
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).
963857137_G
Fig. 5.7.8.a
Generator Protection Parameter Area
MEC-100
93