GEK-106237P MIFII Digital Feeder Relay 2-15
2 PRODUCT DESCRIPTION 2.9 I2 COUNTER (AVAILABLE ONLY IN OPTION 2 MODELS)
2
2.9I
2
COUNTER (AVAILABLE ONLY IN OPTION 2 MODELS)
This counter is intended for breaker maintenance. It accumulates the breaker aging produced by a trip or a breaker
opening. In order to incorporate the breaker history, in the case of second-hand breakers, the system allows assigning an
initial value to the accumulated Amps and to the number of opening operations.
There is one I
2
counter for the three phases, where every time a trip or a breaker opening is produced, the counter value is
increased (in secondary value). If the tripping current is lower than the rated current, the accumulated value will be the
rated current.
When the counter reaches or exceeds a limit value (setting), an I
2
ALARM signal will be produced in the unit status, and the
corresponding event will be generated.
There is also a Breaker Opening counter available, for informational purposes only.
The I
2
counter, and the number of openings counter are stored in capacitor backed up RAM memory.
The setting associated to the I
2
COUNTER is the limit value of the counter that will produce the I
2
t ALARM. This setting is
included in the ADVANCED SETTINGS group, and is described in detail in the SETTINGS section.
Both the I
2
and the Number of Openings counters can receive an operation command to modify their contents. From the
ENERVISTA MII SETUP program, a valid value can be set for any of these two counters. The valid range for the I
2
counter
is from 0.000 to 999.000, and for the “Number of Openings” counter it is from 0 to 999.
From the keypad and display it is only possible to set both fields to zero.
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