Date Code 20081022
Instruction Manual
SEL-787 Relay
Appendix K
Analog Quantities
Instructi on Manual
The SEL-787 Transformer Protection Relay contains several analog quantities
that can be used 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 and 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 500 ms and may not be suitable for fast-response control and protection
applications.
lists analog quantities that can be used in the following specific
functions:
➤
SEL
OGIC
control equations (see
➤
Display points (see
Section 8: Front-Panel Operations
)
➤
Load profile recorder (see
Section 5: Metering and Monitoring
➤
DNP (see
Appendix D: DNP3 Communications
➤
Appendix C: SEL Communications Processors
For a list of analog quantities available for Modbus communications, see
Appendix E: Modbus RTU Communications
Table K.1
Analog Quantities
(Sheet 1 of 6)
Label
Description
Units
Display
Points
SEL
OGIC
Load
Profile
DNP
Fast
Meter
Fundamental Instantaneous Metering
IAW1_MAG
Winding 1 current, A-phase, magnitude
A pri
x
x
x
x
x
IAW1_ANG
Winding 1 current, A-phase, angle
degrees
x
x
x
x
IBW1_MAG
Winding 1 current, B-phase, magnitude
A pri
x
x
x
x
x
IBW1_ANG
Winding 1 current, B-phase, angle
degrees
x
x
x
x
ICW1_MAG
Winding 1 current, C-phase, magnitude
A pri
x
x
x
x
x
ICW1_ANG
Winding 1 current, C-phase, angle
degrees
x
x
x
x
IAVW1MAG
Winding 1 average current, magnitude
A pri
x
x
x
x
IGW1_MAG
Winding 1 current, calculated-residual,
magnitude
A pri
x
x
x
x
IGW1_ANG
Winding 1 current, calculated-residual, angle
degrees
x
x
x
x
3I2W1MAG
Winding 1 current, negative-sequence,
magnitude
A pri
x
x
x
x
IAW2_MAG
Winding 2 current, A-phase, magnitude
A pri
x
x
x
x
x
IAW2_ANG
Winding 2 current, A-phase, angle
degrees
x
x
x
x
Summary of Contents for SEL-787
Page 1: ...20081022 SEL 787 Transformer Protection Relay Instruction Manual PM787 01 NB ...
Page 6: ...This page intentionally left blank ...
Page 12: ...This page intentionally left blank ...
Page 18: ...This page intentionally left blank ...
Page 78: ...This page intentionally left blank ...
Page 206: ...This page intentionally left blank ...
Page 280: ...This page intentionally left blank ...
Page 334: ...This page intentionally left blank ...
Page 376: ...This page intentionally left blank ...
Page 388: ...This page intentionally left blank ...
Page 474: ...This page intentionally left blank ...
Page 508: ...This page intentionally left blank ...