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ABB Network Partner AB
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Page
Function:
1 Application
Fast, reliable supervision of different analogue quantities is of vital impor-
tance during the normal operation of a power system.
Operators in the control centres can, for example:
• Continuously follow active and reactive power flow in the network
• Supervise the busbar voltages
• Check the temperature of power transformers, shunt reactors
• Monitor pressure in circuit breakers
Different measuring methods are available for different quantities. Cur-
rent and voltage instrument transformers provide the basic information on
measured phase currents and voltages in different points within the power
system. At the same time, currents and voltages serve as the input measur-
ing quantities to power and energy meters, protective devices and so on.
Further processing of this information occurs within different control,
protection, and monitoring terminals and within the higher hierarchical
systems in the secondary power system.
The REx 5xx protection, control, and monitoring terminals have a built-in
option to measure and further process information about up to five input
currents and five input voltages. The number of processed alternate meas-
uring quantities depends on the type of terminal and built-in options.
Additional information is also available:
• Mean values of measured currents I in the first, three current-mea-
suring channels
• Mean values of measured voltages U in the first, three voltage-mea-
suring channels
• Three-phase active power P as measured by the first, three current-
and voltage-measuring channels
• Three-phase reactive power Q as measured by the first, three current-
and voltage-measuring channels
• Frequency f
The accuracy of measurement depends on the requirements. Basic accu-
racy satisfies the operating (information) needs. An additional calibration
of measuring channels is necessary and must be ordered separately when
the requirements on accuracy of the measurement are higher. Refer to the
technical data and ordering particulars, for the particular terminal.
The information on measured quantities are then available to the user on
different locations:
• Locally by means of a built-in, man-machine interface (MMI) unit
• Locally by means of a front-connected personal computer (PC)
• Remotely over the LON bus to the station control system (SCS)
• Remotely over the SPA port to the station monitoring system (SMS)
7
Measurement of alternating
quantities
1MRK 580 159-XEN
Version 1.0-00
October 1996
Optional
Summary of Contents for REC 561
Page 19: ...ABB Network Partner AB Introduction REC 561 Version 1 0 00 1MRK 580 146 XEN Page 2 14 ...
Page 31: ...ABB Network Partner AB Requirements and basic technical data REC 561 Version 1 0 00 Page 2 26 ...
Page 49: ...ABB Network Partner AB Page IV ...
Page 121: ...ABB Network Partner AB Menu tree Appendix Version 1 0 00 1MRK 580 158 XEN Page 3 72 ...
Page 139: ...ABB Network Partner AB Terminal identification Version 1 0 00 1MRK 580 160 XEN Page 4 4 ...
Page 143: ...ABB Network Partner AB Activation of setting group Version 1 0 00 1MRK 580 162 XEN Page 4 8 ...
Page 175: ...ABB Network Partner AB Configurable logic Version 1 0 00 1MRK 580 161 XEN Page 4 40 ...
Page 385: ...ABB Network Partner AB Apparatus control Version 1 0 00 1MRK 580 150 XEN Page 6 100 ...
Page 495: ...ABB Network Partner AB Interlocking Version 1 0 00 1MRK 580 151 XEN Page 6 210 ...
Page 515: ...ABB Network Partner AB Event function Version 1 0 00 1MRK 580 140 XEN Page 6 230 ...
Page 519: ...ABB Network Partner AB Page IV ...
Page 561: ...ABB Network Partner AB Time synchronisation Version 1 0 00 1MRK 580 135 XEN Page 7 42 ...
Page 569: ...ABB Network Partner AB Internal events Version 1 0 00 1MRK 580 134 XEN Page 7 50 ...
Page 599: ...ABB Network Partner AB Index Version 1 0 01 1MRK 580 175 XEN Page 8 6 ...
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