Demand Values - ABB REU 610 Technical Reference Manual

REU 610
5.1.9.
5.1.10.
5.1.11.
5.1.11.1.
52
Voltage Relay
Technical Reference Manual - ANSI Version

Demand values

The relay provides three different kinds of demand values.
The first value shows the average voltage of all three phase-to-phase voltages
measured during one minute. The value is updated once a minute.
The second value shows the average voltage during an adjustable time range,
ranging from 0 to 999 minutes, with an accuracy of one minute. This value is
updated at the expiration of each time range.
The third value shows the highest one-minute average voltage value
measured during the previous time range. However, if the time range is set to
zero, only the one-minute and the maximum average voltage value is shown.
The maximum value is the highest one-minute mean value since the last reset.
The average voltage values can be set to zero through serial communication
using SPA parameter V102. The average voltage values are also reset if SPA
parameter V105 is changed or the relay is reset.
Commissioning tests
The following two product functions can be used during the commissioning
of the relay: function test and digital input test.
The function test is used for testing the configuration as well as the
connections from the relay. By selecting this test, the internal signals from the
protection elements, the external trip signal and the IRF function can be
activated one by one. Provided that the signals have been set to be routed to
the output contacts (PO1...PO3 and SO1...SO5) with the switches of SGR1...
SGR8, the output contacts are activated and their corresponding event codes
are generated when the test is run. However, activation of the internal signals
from the protection elements, the external trip signal and the IRF function do
not generate an event code.
The digital input test is used for testing the connections to the relay. The state
of the digital inputs can be monitored via the HMI.
Refer to the Operator's Manual for instructions on how to perform the tests.
Disturbance recorder
Function
The relay features an integrated disturbance recorder which continuously
captures the curve forms of the voltages as well as the status of both internal
signals and the external digital input signals and stores these in the memory.
1MRS755972