Breaker Failure To Open (Only Option 2 Models); I 2 Counter (Only Option 2 Models) - GE GEK-106273L Instruction Manual

2.5

BREAKER FAILURE TO OPEN (ONLY OPTION 2 MODELS)

This unit produces an alarm if the breaker does not open after a tripping command.
This unit can be enabled independently from having an input that indicates the breaker health:
If a breaker health input is enabled:
After a trip, the following conditions are checked:
1. If the breaker is closed, the BREAKER FAILURE function is started.
2. If the breaker is open, the unit checks the current. If the highest current is over 8% of the rated current, the
BREAKER FAILURE function is started.
After the BREAKER FAILURE pickup, a timer is started. When the timer countdown finishes, if the function is not
disabled, the FAILURE TO OPEN status signal is activated, and the corresponding event is generated.
The Breaker Failure to Open signal is reset when once the breaker has been opened, it gets closed again.
If a breaker health input is not enabled:
After a trip, the unit checks whether the highest current value is over 8% of the rated current. In this case, a timer is
started. When the timer countdown finishes, if the current value has not fallen below 4% of the rated current, the
FAILURE TO OPEN status signal is activated, and the corresponding event is generated.
The Breaker Failure to Open signal is reset when the current value rises above 8% of the rated current after having
fallen below 4% of it.
The settings associated to BREAKER FAILURE TO OPEN are the function permission and the timer value. They are
included in the ADVANCED SETTINGS group. They will be described in the SETTINGS section.
2
2.6 I COUNTER (ONLY OPTION 2 MODELS)
This counter is intended for breaker maintenance. It accumulates the breaker ageing produced by a trip or a breaker
opening. In order to incorporate the breaker history, in case of second-hand breakers, the system allows assigning an
initial value to the accumulated Amps and to the number of opening operations.
2
There is one I 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 I2 ALARM signal will be produced in the unit status,
and the corresponding event will be generated.
There is also a Breaker Opening counter available, only for information purposes.
2
The I counter, and the number of openings counter are stored in capacitor backed up RAM memory.
The setting associated to the I
setting is included in the ADVANCED SETTINGS group, and is described in detail in the SETTINGS section.
2
Both the I 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 fields. The valid range for the I
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.
GEK-106273L
PRODUCT DESCRIPTION
2
COUNTER is the limit value of the counter that will produce the I
MIF Digital Feeder Protection
2
ALARM. This
2
2-9