Parameter name Enum name Value
Load shed mode None 0
Load shed mode Instantaneous 1
Load shed mode Voltage base 2
Load shed mode Time base 3
The active transfer mode that carries out the transfer action is provided by Transfer
mode output.
Table 1607
shows the calculation for Transfer mode recorded data
parameter and priority order in case multiple modes are active for bus transfer.
Table 1607: Transfer mode output calculation
Priority order
Cause of Transfer Transfer mode output
1 Fast transfer completed &
Transfer cause > 0
1=Fast transfer
2 FBBM transfer completed &
Transfer cause > 0
2=FBBM
3 1
st
phase coincidence trans-
fer completed & Transfer
cause > 0
3=Phase coincidence
4 Residual voltage transfer
completed & Transfer cause >
0
4=Res Voltage transfer
5 Time delay transfer comple-
ted & Transfer cause > 0
5=Time delay transfer
6 None 0=None
The transfer direction from feeder 1 to feeder 2 or vice – versa is recorded by
Transfer direction recorded data parameter.
The maximum rate of change of busbar voltage, the maximum rate of change of
frequency and frequency difference between stand-by feeder and busbar, busbar
frequency, busbar voltage, phase angle difference between stand-by feeder and
busbar are provided by Max dv/dt, Max df/dt, Bus frequency, Bus voltage, Phase
Diff recorded data parameters respectively at the instance transfer complete is
activated.
9.12.6 Application
The High speed transfer device is utilized where the availability of a safe voltage
supply is important and where a breakdown of the electrical energy supply would
mean an interruption in production and thus lead to costs and/or damages as a
result.
The usual areas of installation include, for example:
1. Auxiliary distributions in power stations, for example
1MRS759142 F
Control functions
REX640
Technical Manual
1787
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