Control Elements - GE Multilin G650 Manual

6.2 STATUS
6.2.4.1 FREQUENCY
G650 units incorporate three overfrequency and three underfrequency units as well as three frequency rate of change
units. For each of them there are two magnitudes pickup and trip (operation).
Frequency elements are often used in generating plants, as well as in the connection of substations to the main system.
Frequency monitoring is the base for synchronous machines protection application, with a couple of setting levels, as well
as for the development of automatic shedding functions and underfrequency reset.
This screen shows the activation of all frequency elements available in the G650. It can be accessed from the menu:
Actual> Status > Control Elements >Frequency, and it includes the following signaling LEDs.
Table 6–13: FREQUENCY ACTUAL VALUES
6
6.2.4.2 SYNCHROCHECK
This screen can be accessed at Actual> Status > Control Elements > Synchrocheck, and it includes the following
signaling LEDs for the synchronism check function:
Table 6–14: SYNCHROCHECK ACTUAL VALUES
Synchrocheck BLK INP:
Synchrocheck OP:
6-12
OVERFREQUENCY ACTUAL VALUES
OVERFREQ1 PKP
OVERFREQ1 OP
OVERFREQ2 PKP
OVERFREQ2 OP
OVERFREQ3 PKP
OVERFREQ3 OP
FREQUENCY RATE OF CHANGE
ACTUAL VALUES
FREQ RATE1 PKP
FREQ RATE1 OP
FREQ RATE2 PKP
FREQ RATE2 OP
FREQ RATE3 PKP
FREQ RATE3 OP
SYNCHROCHECK ACTUAL VALUES
Synchrocheck BLK INP
Synchrocheck OP
SYNCHK CLOSE PERM
Synchrocheck COND OP
DL-DB OPERATION
DL-LB OPERATION
LL-DB OPERATION
SLIP CONDITION
BUS FREQ > LINE FREQ
BUS FREQ < LINE FREQ
VOLTAGE DIFFERENCE
FREQUENCY DIFFERENCE
Block signal for the synchrocheck unit, configurable at Setpoint > Relay
Configuration > Protection Elements
Closing permission signal in live line-live bus conditions with open breaker.
G650 Generator Protection & Control System
UNDERFREQUENCY ACTUAL VALUES
UNDERFREQ1 PKP
UNDERFREQ1 OP
UNDERFREQ2 PKP
UNDERFREQ2 OP
UNDERFREQ3 PKP
UNDERFREQ3 OP
6 ACTUAL VALUES

6.2.4 CONTROL ELEMENTS

GEK-113285A