Date Code 20170814
Instruction Manual
SEL-700G Relay
Appendix K
Instruction Manual
Analog Quantities
The SEL-700G Relay contains several analog quantities that you can use for
more than one function. The actual analog quantities available depend on the
part number of the relay used. Analog quantities are typically generated and
used by a primary function, such as, metering. Selected quantities are made
available for one or more supplemental functions, for example, the load
profile.
Note that all analog quantities available for use in SEL
OGIC
are processed
every 100 ms and may not be suitable for fast-response control and protection
applications. Analog quantities for rms data are determined through the use of
data averaged over the previous 8 cycles.
Table K.1 lists analog quantities that you can use in the following specific
functions:
➤
Display points (see Section 8: Front-Panel Operations.)
➤
SEL
OGIC
control equations (see Section 4: Protection and
➤
Load profile recorder (see Section 5: Metering and
Monitoring.)
➤
DNP (see Appendix D: DNP3 Communications.)
➤
Fast Meter (see Appendix C: SEL Communications
Processors.)
For a list of analog quantities available for Modbus communications, see
Appendix E: Modbus RTU Communications. For a list of analog quantities
available for IEC61850 communications, refer to the logical nodes
information in Appendix F: IEC 61850 Communications.
NOTE:
Quantities that contain X
(e.g., IAX_MAG) refer to the X side;
quantities that contain Y (e.g.,
IAY_MAG) refer to the Y side.
Table K.1
Analog Quantities
(Sheet 1 of 9)
Label
Description
Units
Di
s
p
la
y
Po
in
ts
SE
L
OGIC
Lo
ad
Pr
o
fi
le
DN
P
Fa
s
t
Me
te
r
Fundamental Instantaneous Metering
IAX_MAG
A-phase line current
A primary
x
x
x
x
x
IAX_ANG
Angle of the A-phase line current
degrees
x
x
x
x
IBX_MAG
B-phase line current
A primary
x
x
x
x
x
IBX_ANG
Angle of the B-phase line current
degrees
x
x
x
x
ICX_MAG
C-phase line current
A primary
x
x
x
x
x
ICX_ANG
Angle of the C-phase line current
degrees
x
x
x
x
IGX_MAG
Calculated-residual current
A primary
x
x
x
x
IGX_ANG
Angle of the calculated-residual current
degrees
x
x
x
x
I1X_MAG
Positive-sequence current
A primary
x
x
x
x
I1X_ANG
Angle of the positive-sequence current
degrees
x
x
x
x
Summary of Contents for SEL-700G Series
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