ABB RELION REX640 Technical Manual page 1482

Measurement functions
PEMMXU provides pulse outputs EAFPULSE, EARPULSE, ERFPULSE and ERRPULSE
which are activated based on the calculated values of forward and reverse, active
and reactive accumulated energy. The activation of the pulse depends on the
quantity setting. For example, if Pulse quantity is set as "10000" Wh, EAFPULSE is
activated every time accumulated energy EA_FWD_ACM increases by 10000 Wh. The
pulse-on and -off time duration can be set using the
time settings.
Instantaneous three-phase power and power factor measurements are available for
application configurations through output S_INST, P_INST, Q_INST and PF_INST.
Three-phase power and power factor demand values (S_DMD, P_DMD, Q_DMD and
PF_DMD) are provided as outputs. These outputs are dedicated for Load profile
recorder (LDPRLRC).
8.1.13.4 Analog channel configuration
PEMMXU has two analog group inputs which all must be properly configured.
Table 1429: Analog inputs
Input
I3P
U3P
There are a few special conditions which must be noted with the configuration.
Table 1430: Special conditions
Condition
U3P connected to real meas-
urements
Improper analog channel configuration causes a validation error if the analog
channels are not completely configured or they do not match with certain settings.
For troubleshooting, check the contents of this chapter and also the preprocessing
blocks in this document. The configuration can be written to the protection relay
once the mismatch is corrected.
8.1.13.5 Signals
1482
Description
Three-phase currents
Three-phase voltages
See the preprocessing function blocks in this document for the possible
signal sources.
Description
The function can work with the corresponding one voltage
channel connected if
"PhsBC" or "PhsCA".
The function can work with the corresponding two voltage
channels connected if
"PhsB" or "PhsC".
The function requires that all three voltage channels are con-
nected for the other measurement modes.
Pulse on time and Pulse off
Measurement mode is set to "PhsAB",
Measurement mode is set to "PhsA",
Technical Manual
1MRS759142 F
Pulse
REX640