Multiple Settings Groups; Measurement And Self-Test - GE GEK-106273L Instruction Manual

Date and time
Model
Number of oscillo
Ia, Ib, Ic and In currents in the moment of the oscillography trigger
Active table in the moment of the oscillography trigger
Unit's settings when retrieving the oscillography record.
The number of oscillo is a circular counter that increases with each generated oscillo. This value appears on the relay
status and is used only for informative purposes.
The oscillography record is stored in a capacitor backed up RAM memory.
The whole MIF functionality related to oscillography is performed from the ENERVISTA MII SETUP program. The
oscillography record obtained is stored on the PC in a COMTRADE-IEEE C37.111-1991 format.
There are four possible causes that can produce an oscillography trigger:
Pickup of one of the protection functions
Trip of one of the protection functions
Oscillography trigger by communications
Oscillography trigger by digital input
In the ADVANCED SETTINGS group, there is a sub-group called OSCILLOGRAPHY MASKS, from where the above
mentioned causes can be masked. They are detailed in the SETTINGS section.
*Protection functions: 50PH, 50PL, 50NH, 50NL, 51P, 51N, 49, general
2.9

MULTIPLE SETTINGS GROUPS

Two independent Settings Groups are available in the permanent (non-volatile) memory of the MIF relay. Only one of
the two is active at a given time. User can select which settings group is active using a setting, sending a command
to the relay from the communications program, or by a digital input in OPTION 1 and OPTION 2 models.
Settings are divided in two different categories: Main Settings and Advanced Settings. This makes setting the relay
extremely simple for those users who want to use just the Main functions of the MIF relay. For those users who need
to use the full functionality of the relay, the Advanced Settings must be used.
2.10

MEASUREMENT AND SELF-TEST

Measurement
The MIF provides actual values for phase and ground currents and for the Thermal Image. The accuracy is 1% at In,
and 3% in the complete range.
Self-Test
The self-monitoring tests are carried out both when the unit is started up and during normal operation. Any internal
problem detected by the self-monitoring function will issue an alarm and the READY output contact will be activated,
meaning that a critical failure has occurred.
2-12
PRODUCT DESCRIPTION
MIF Digital Feeder Protection GEK-106273L