GE MOV 2000, Instructions Manual, Page: 28 / 78

3. SETTINGS
GEK-106271 MIV Digital Multifunctional Protective Relay 25
3. OSCILLOGRAPHY SETTINGS
3.1 NUMBER OF PRE-FAULT CYCLES
This setting allows to choose the number of pre-fault cycles that the user wishes to store with each
oscillography record. Pre-fault means what has occurred just before the cause that triggered the oscillography.
3.2 Oscillography Trigger Mask
This setting allows to choose the causes that will trigger an oscillography record
4. SWITCHGEAR SETTINGS
4. 1 OPENING TIMER:
When in the general setting 4.3 it is set that the line switch status will be determined by two input contacts
(normally open –A and normally closed –B), the unit verifies that the transition from closed to open does not
exceed the set time.
4.2 CLOSING TIMER
When in the general setting 4.3 it is set that the line switch status will be determined by two input contacts
(normally open –A and normally closed –B), the unit verifies that the transition from open to closed does not
exceed the set time.
4.3 NUMBER OF CONTACTS:
Using this setting we specify the number of input contacts used for establishing the line switch status. In
case of setting a 1, the contact must be normally open (-A). When setting a 2, contact –A (normally open) and
contact –B (normally closed), the unit itself will solve the undetermined status (both contacts energised) and the
opening and closing failure statuses (both contacts deenergized during a time longer than the opening and closing
times).
We must take into account that when this setting is 2 and the switch status is undetermined (not open nor
closed), those functions where the line switch status is necessary will not operate.
PARTICULAR SETTINGS
1. VOLTAGE LEVEL SETTINGS
1.1 UNDERVOLTAGE:
This setting determines the voltage value under which undervoltage is detected.
1.2 VOLTAGE ABSENCE:
This setting determines the voltage value under which voltage absence is determined.
1.3 VOLTAGE PRESENCE:
This setting determines the voltage value over which voltage presence is detected.
1.4 WEAK INFEED:
This setting determines the voltage value under which weak infeed is determined.