GE Multilin W650, Instruction Manual

Page: 163 / 622

GEK-113032A W650 Wind Generator Protection System 5-23
5 SETTINGS 5.3 SYSTEM SETUP
5
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.
5.3.3.2 BREAKER MAINTENANCE
To consider used breakers, the relay allows to set initial I
2
t values as well as an initial number of operations, in order to take
into account previous breaker operations, as well as operations produced during testing. Breaker maintenance parameters
can be set in the breaker maintenance menu.
BREAKER MAINTENANCE ( Setpoint > System Setup > Breaker > Breaker Maintenance )
Table 5–24: BREAKER MAINTENANCE SETTINGS
In this group of settings, the start values of the breaker Counters can beset.
These Counters allow the breaker Maintenance. They are used to accumulate the breaker aging produced by a trip or a
breaker opening. In order to incorporate the breaker’s history, in case of used breakers, the system allows assigning an
initial value to accumulated amperes, and to the number of opening and closing operations.
To supervise breaker aging,
Σ
(KI)
2
t accumulated values are calculated and stored for each phase in each opening. If the
rated current is not exceeded, as in the case of a manual opening command, without fault current, the relay uses the rated
current instead of the measured value.
(KI)
2
t value is accumulated and maintained in independent Counters for each phase. Counters can be accessed through
the local HMI as well as through the EnerVista 650 Setup software. The element incorporates a setting to select the
integration time ((KI)
2
t Integ. Time).
The signals associated to the opened or closed status of the breaker can be monitored at “ Actual > Status > Breaker ”
Table 5–25: BREAKER STATUS
The signals associated to breaker maintenance can be monitored at “ Actual > Status > Records Status > Breaker
Maintenance ”, and they are as follows:
Table 5–26: BREAKER MAINTENANCE STATUS
SETPOINT > SYSTEM SETUP > BREAKER > BREAKER MAINTENANCE
setting Description Name Default Value Step Range
(KI)
2
t Counter Phase A (KI)
2
t BKR Ph A Cnt
0.00
0.01 (KA)
2
s
[0.00 : 9999.99]
(KI)
2
t Counter Phase B (KI)
2
t BKR Ph B Cnt
0.00
0.01 (KA)
2
s
[0.00 : 9999.99]
(KI)
2
t Counter Phase C (KI)
2
t BKR Ph C Cnt
0.00
0.01 (KA)
2
s
[0.00 : 9999.99]
Openings counter BKR Openings Cnt 0 1 [0 : 9999]
Closings counter BKR Closings Cnt 0 1 [0 : 9999]
BREAKER STATUS DESCRIPTION
BREAKER OPEN Breaker in open position.
BREAKER CLOSED Breaker in close position
BREAKER UNDEFINED Breaker undefined
BREAKER MAINTENANCE DESCRIPTION
(KI)
2
t PHASE A ALARM
This signal activates when the set value for phase A is exceeded.
(KI)
2
t PHASE B ALARM
This signal activates when the set value for phase B is exceeded.
(KI)
2
t PHASE C ALARM
This signal activates when the set value for phase C is exceeded.
BKR OPENINGS ALARM Relay total Number of Openings alarm
BKR OPEN 1 HOUR ALRM Relay total Number of Openings in one hour alarm