are live. When the fuse failure detection from either set of VTs is active, the sync check
function will be blocked.
SECRSYN1
O:120|T:5|I:1
BLOCK
CL_COMMAND
BYPASS
SYNC_INPRO
SYNC_OK
CL_FAIL_AL
CMD_FAIL_AL
LLDB
LLLB
DLLB
DLDB
OR
O:119|T:2.5|I:19
B1
B2
O
SEQRFUF1_60-1_FUSEF_U
SEQRFUF2_60-2_FUSEF_U SECRSYN1_25_SYNC_OK
GUID-1D6C29B3-4B6A-425C-BBE3-852E0EE9472E V1 EN
Figure 245: Sync check function
3.7.3.5 Functional diagrams for measurement functions
The phase current inputs to the relay are measured by the three-phase current
measurement function CMMXU1. The current input is connected to the X120 card in the
back panel. Similarly, the sequence current measurement CSMSQI1 measures the
sequence current and the residual current measurement RESCMMXU1 measures the
residual current.
The three-phase source 1 (bus 1) voltages side phase voltage and the three-phase source
2 (bus 2) voltages side phase voltage inputs to the relay can be measured by three-phase
voltage measurement VMMXU1 and VMMXU2. The voltage input is connected to the
X130 card in the back panel. The sequence voltage measurement VSMSQI1 and
VSMSQI2 measures the sequence voltage and the residual voltage measurement
RESVMMXU1 measures the residual voltage.
The measurements can be seen from the LHMI and they are available under the
measurement option in the menu selection. Based on the settings, function blocks can
generate low alarm or warning and high alarm or warning signals for the measured current
values.
The frequency measurement FMMXU1 of the power system and the three-phase power
and energy measurement PEMMXU1 are available. Load profile record LDPRLRC1 is
included in the measurements sheet. LDPRLRC1 offers the ability to observe the loading
history of the corresponding feeder.
Section 3 1MAC109016-MB C
REF615 standard configurations
188 REF615 ANSI
Application Manual
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