Feeder Terminal REF 541, REF 543, REF 545.
1MRS750443-MBG
18
1) These functions are only supported in the feeder termi-
nal revisions of Release 1.5 or later
2) These functions are only supported in the feeder termi-
nal revisions of Release 2.0 or later.
Measurement function settings
MEFR1 f f System frequency measurement
MEPE7 PQE PQE Three-phase power and energy measurement
MEVO1A Uo Uo Residual voltage measurement, stage A
MEVO1B
2)
Uo_B Uo_B Residual voltage measurement, stage B
MEVO3A 3U 3U Three-phase voltage measurement, stage A
MEVO3B
2)
3U_B 3U_B Three-phase voltage measurement, stage B
Table 5: Measurement functions
Function ANSI
device no.
IEC
symbol
Description
General measurement/ analogue input on RTD/analogue module, MEAI1...8 (AI1...AI8)
The general measurement function blocks can be used to measure general purpose dc or ac voltage
signals with a sensor input. They also include a REAL type input which can be used to monitor any internal
REAL type IEC 61131-3 based signal, e.g. input data from the RTD/analogue module.
GE1…3 (V dc/ac)
General REAL type input
-10000.00000...10000.00000
-10000.00000...10000.00000
Neutral current measurement, MECU1A and MECU1B (Io, Io_B)
Io (A)
Io (%)
0.0…20000.0 A
0.0…80.0% In
Three-phase current measurement, MECU3A and MECU3B (3I, 3I_B)
IL1
IL2
IL3
IL1
IL2
IL3
IL1 demand
IL2 demand
IL3 demand
IL1 demand
IL2 demand
IL3 demand
0.0…20000.0 A
0.0…20000.0 A
0.0…20000.0 A
0.0…1000.0% In
0.0…1000.0% In
0.0…1000.0% In
0.0…20000.0 A
0.0…20000.0 A
0.0…20000.0 A
0.0…1000.0% In
0.0…1000.0% In
0.0…1000.0% In
Transient disturbance recorder for 16 analogue channels, MEDREC16 (DREC)
The transient disturbance recorder MEDREC16 is used for recording the current and voltage waveforms,
as well as the status data of internal IEC 61131-3 based logic signals and digital inputs connected to the
feeder terminals. The maximum number of analogue inputs and logic signals is 16. One fundamental cycle
contains 40 samples.
Operation mode
Pre-trg time
Over limit ILx
Over limit Io
Over limit Iob
Over limit Uo
Over limit Ux
Over limit Uxy
Over limit U12b
Over limit ILxb
Under limit Ux
Under limit Uxy
AI filter time
Saturation
Overwrite
Extension
0…100%
0.00…40.00 x In
0.00…40.00 x In
0.00…40.00 x In
0.00…2.00 x Un
0.00…2.00 x Un
0.00…2.00 x Un
0.00…2.00 x Un
0.00…40.00 x In
0.00…2.00 x Un
0.00…2.00 x Un
0.000…60.000 s
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