Harm3Level
: This is the set level of 3
rd
harmonic with respect to fundamental signal at which
the
DelI>
should be modified. Typical setting is 15% of fundamental signal.
StValGrad
: This setting is used to modify the
DelI>
based on 3
rd
harmonic level. Typical setting
is 10% to modify the
DelI>
.
11.5 Delta supervision of real input DELSPVC
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11.5.1 Identification
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Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Delta supervision of real input DELSPVC – –
11.5.2 Application
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Delta supervision of real input DELSPVC is a general processed input delta supervision. It is
used to configure any processed inputs such as:
• Power (S)
• Active power (P)
• Reactive power (P)
• Thermal heat content (ɸ)
• Energy
The change over time of these quantities with respect to the old value can be supervised with
this function.
11.5.3 Setting guidelines
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Operation
: This setting is used to enable/disable the delta supervision function.
MinStVal
: The minimum start level of the function. If the input is below this level, the function
will be blocked. It should be set depending on the input connected.
DelSt>
: This setting is used to set the start value for delta detection.
DeltaT
: This setting defines the number of execution cycles of old data to be used for delta
calculation. That is, if
DeltaT
setting is set as 6 for a 3 ms function, an 18 ms old value will be
used to compare the change against.
tHold
: This setting defines the pulse length for the start signal. A typical value of this setting is
100 ms.
Section 11 1MRK 505 370-UEN D
Secondary system supervision
248 Busbar protection REB670
Application manual
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