ABB RET 543 - Page 63

Table 31: Measurement functions
Types of measurement IEC Symbol Measurement function Function block code
General measurement/
analog input or analog
output
mA/V/C/ General measurement/
analog input on
RTD/analog module
MEAI1...8
mA Analog output on
RTD/analog module
MEAO1...4
Current 3I Three-phase current
measurement, stage A
MECU3A
3I Three-phase current
measurement, stage B
MECU3B
Io Neutral current
measurement, stage A
MECU1A
Io Neutral current
measurement, stage B
MECU1B
Voltage 3U Three-phase voltage
measurement, stage A
MEVO3A
3U Three-phase voltage
measurement, stage B
MEVO3B
Uo Residual voltage
measurement, stage A
MEVO1A
Uo Residual voltage
measurement, stage B
MEVO1B
Energy / Power E, P, Q, pf Three-phase power and
energy measurement
MEPE7
Frequency f System frequency
measurement
MEFR1
Recording Transient disturbance
recorder
MEDREC16
Transformer Terminal RET 541, RET 543, RET 545
1MRS755543
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Table 32: Control functions
Types of control Symbol Control function Function block code
Circuit breaker 0 1 Circuit breaker 1 (2 state
inputs / 2 control outputs)
COCB1
0 1 Circuit breaker 2 (2 state
inputs / 2 control outputs)
COCB2
0 1 Direct open for CBs via
HMI
COCBDIR
Disconnector 0 1 Disconnector 1...5
(2 state inputs / 2 control
outputs)
CODC1...CODC5
0 1 Three state disconnector
1 (3 state inputs/ 4 control
outputs)
CO3DC1
0 1 Three-state disconnector
2 (3 state inputs/ 4 control
outputs)
CO3DC2