2-10
MIB High Impedance Bus Differntial Relay
GEK-106426B
2.5 CALCULATION OF SETTINGS
2 PRODUCT DESCRIPTION
2
Figure 2–6: MOV VOLTAGE & CURRENT CHARACTERISTICS
EVENTS
MIB stores an historical record with the last 24 events. Each event contains the event description, date and time (4 ms
accuracy), the current values in phases and ground at that moment, and a summary of the status signals that can produce
events, and whether they were active or not in that moment.
In ENERVISTA MII SETUP there is an “EVENTS” menu, where the user can check how many events have been produced
since the last time the Events were deleted. If this number is higher than 24 (maximum number of events stored), this
means that only the last 24 will be stored.
This event record is stored in a capacitor backed up RAM memory. Events functionality in MIB is performed via the
ENERVISTA MII SETUP software.
Inside the ADVANCED SETTINGS group, there is a sub-group called EVENT MASKS, from where the different causes that
can produce events can be masked. They are detailed in the SETPOINT – SETPOINT – ADVANCED SETTINGS – EVENT
MASK section. The following table shows a list of all possible events:
Table 2–1: LIST OF EVENTS
NAME
VALUE
87 1 Pickup/Drop out
Yes
87 2 Pickup/Drop out
Yes
General PIckup
Yes
87 1 Trip
Yes
87 2 Trip
Yes
General trip
Yes
87 1 Disable by input
Yes
MOV Voltage & Current Characteristics
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