53
5.5.
Digital input test
This section describes how the availability of signals connected to the digital inputs
can be tested.
To monitor the status of the digital inputs, navigate in the HMI menu as follows:
1. Press an arrow button to access the main menu.
2. Use
or
to select
CONFIGURATION
in the main menu and press
. The
cursor is at the first menu item,
FUNCTION TEST/DI
. Press
again to enter
the test menu.
3. Use
or
to select
DI STATUS
and press
to see the status of
DI1
.
4. Use
and
to monitor the state of the other four digital inputs.
5. Press
to return the display to the idle mode.
It is also possible to read the state of the digital inputs via serial
communication.
5.6.
Testing protection functions
The maximum continuous voltage withstand 2 × U
n
(3 × U
n
for
maximum of 10 seconds) must not be exceeded.
The overvoltage and residual voltage protection functions in the relay can be tested
with the setting values used during normal operation. If other settings are used
during testing, make sure that the original settings are re-entered after the test is
completed.
The test is performed as a secondary test, by applying voltage to the voltage
energizing inputs. To enable secondary testing without accidentally blocking other
relays or tripping circuit breakers in the system, the relay has to be disconnected.
5.6.1.
Testing overvoltage protection
During the test, the overvoltage protection stage U>> should be set to
be based on phase-to-phase voltage measurement.
Voltage Protection Relay
Operator's Manual
REU 610
REU 610
1MRS755770
