GE Multilin G650, Manual

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GEK-113285A G650 Generator Protection & Control System 5-23
5 SETTINGS 5.3 SYSTEM SETUP
5
5.3.3 BREAKER
There are two types of breaker settings:
Breaker settings:
These settings correspond to the switchgear configured as a breaker in the G650; this switchgear is
used in the recloser functions, breaker failure and synchronism.
Breaker Maintenance:
These settings correspond to the initialization of the (KI)
2
t counters, and the counting of the
number of openings and closings of the switchgear configured as a breaker.
5.3.3.1 BREAKER SETTINGS (SETPOINT > SYSTEM SETUP > BREAKER > BREAKER SETTINGS)
Table 5–22: BREAKER SETTINGS
Breaker settings are as follows:
Number of switchgear:
This is the Number of the Switchgear that is configured as a breaker. It is the reference for
breaker failure (50BF) and synchronism (25) elements. The selected switchgear in the
breaker settings must be previously configured at
Setpoint > Relay Configuration >
Switchgear
. The relay allows to configure up to 16 switchgear elements, but the one
configured as a breaker will be the reference for (KI)
2
t, openings and closings counters.
Maximum (KI)
2
t:
This is the maximum set value for the square of the current multiplied by the breaker
opening time. There is a separate counter for each phase, but the value stored as the
maximum is a single value for the three phases.
(KI)
2
t Integration Time:
This is the integration time taken as the base (fixed opening time) for the calculation of
(KI)
2
t.
Maximum Openings:
This is the maximum number of openings allowed in the relay, with a limit of 9999; once
this value is exceeded, the relay will produce an alarm. When the limit 9999 is reached the
maximum openings counter will start from zero.
Maximum Openings in 1 hour:
This is the maximum number of openings allowed in the relay during one hour; once this
value is exceeded, the corresponding alarm signal will be activated; this value is updated
and reset after one hour.
Snapshot Events:
This setting enables or disables the snapshot event generation for the breaker signals.
The interrupted current limit setting, fixes the Maximum breaker capacity (this value is set depending on the information
provided by the breaker manufacturer); the relay incorporates a (KI)
2
t counter for each phase, when a breaker opening
occurs, the counter increases its value (in primary values). If the flowing current is lower than the rated current, the relay will
take the rated current value for its calculations. When the accumulated counter for each phase reaches or exceeds the set
value, the corresponding alarm signal will be activated.
The purpose of this function is to provide closer information of the current status of the breaker’s internal contacts. This is,
in order to ensure appropriate breaker maintenance, and to decrease the risk of damage when the breaker has suffered
severe operations during a long time. Once the breaker has been operated, and the preventive maintenance is in place, the
accumulated I
2
t values and the number of operations are reset to zero.
SETPOINT > SYSTEM SETUP > BREAKER > BREAKER SETTINGS
Setting Description Name Default
Value Step Range
Number of Switchgear selected as breaker Number of Switchgear 1 1 [1 : 16]
Maximum value of (KI)
2
t Maximum (KI)
2
t
9999.99
0.01(KA)
2
s
[0.00 : 9999.99]
(KI)
2
t integration time (KI)
2
t Integ. Time
0.03 0.01s [0.03 : 0.25]
Maximum number of openings Maximum Openings 9999 1 [0 : 9999]
Maximum Openings in one hour Max.Openings 1 hour 40 1 [1 : 60]
Snapshot Event generation Snapshot Events ENABLED N/A [DISABLED – ENABLED]