ABB RELION REX640 Technical Manual page 1448

Protection and control

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Measurement functions

Phase current demand values in volts are for connecting to Load profile recorder

(LDPRLRC) through outputs I_DMD_A, I_DMD_B and I_DMD_C.

Analog channel configuration

VMMXU has one analog group input which must be properly configured.

Table 1369: Analog inputs

There are a few special conditions which must be noted with the configuration.

Table 1370: Special conditions

U3P connected to real measurements

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.

VMMXU Input signals

Table 1371: VMMXU Input signals

See the preprocessing function blocks in this document for the possible

signal sources.

Three-phase voltages

The function requires that at least one volt-

age channel is connected if

ses is set to "1 out of 3".

The function requires that at least two volt-

age channels are connected if

phases is set to "2 out of 3".

The function requires that all three voltage

channels are connected if

ses is set to "3 out of 3".

Three-phase voltages

Block signal for all bi-

nary outputs

1MRS759142 F

Num of start pha-

Num of start

Num of start pha-

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