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H.7
Date Code 20081022
Instruction Manual
SEL-787 Relay
Synchrophasors
Settings for Synchrophasors
NUMANA
Selects the number of user-definable analog values to be included in the
synchrophasor data stream.
This setting is one of six settings that determine the minimum port SPEED
necessary to support the synchrophasor data packet rate and size—see
Communications Bandwidth on page H.12
for detailed information.
The choices for this setting depend on the synchrophasor system design.
➤
Setting NUMANA := 0 sends no user-definable analog values.
➤
Setting NUMANA := 1–4 sends the user-definable analog
values, as listed in
The format of the user-defined analog data is always floating point, and each
value occupies four bytes.
Table H.3
Synchrophasor Order in Data Stream (Voltages and Currents)
Synchrophasors
a
a
Synchrophasors are included in the order shown (i.e., voltages, if selected, will always
precede currents).
Included When Global Settings Are as Follows:
Polar
Magnitude
Angle
V1
V1
PHDATAV := V1 or ALL
VA
VA
VB
VB
PHDATAV := ALL
VC
VC
I1W1
I1W1
PHDATAI := I1 or ALL
AND
(PHCURR := IW1 or BOTH)
IAW1
IAW1
IBW1
IBW1
PHDATAI := ALL
AND
(PHCURR := IW1 or BOTH)
ICW1
ICW1
I1W2
I1W2
(PHDATAI := I1 or ALL)
AND
(PHCURR := IW2 or BOTH)
IAW2
IAW2
IBW2
IBW2
PHDATAI := ALL
AND
(PHCURR := IW2 or BOTH)
ICW2
ICW2
Table H.4
User-Defined Analog Values Selected by the NUMANA Setting
NUMANA Setting
Analog Quantities Sent
Total Number of Bytes
Used for Analog Values
0
None
0
1
MV29
4
2
Above, plus MV30
8
3
Above, plus MV31
12
4
Above, plus MV32
16
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