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 Table H.4.
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
1MV29 4
2 Above, plus MV30 8
3 Above, plus MV31 12
4 Above, plus MV32 16
To Next Page
Loading...
