Pay attention to the current polarity. Make sure that the connection of input and
output current terminals and the connection of the residual current conductor is
correct. Check that the input and output logical signals in the logic diagram for the
function under test are connected to the corresponding binary inputs and outputs of
the IED under test.
4.5
Releasing the function to be tested
Release or unblock the function to be tested. This is done to ensure that only the
function or the chain of functions to be tested are in operation and that other
functions are prevented from operating. The user can release the tested function(s)
by setting the corresponding
Blocked
parameter under Function test modes to
No
in
LHMI.
When testing a function in this blocking feature, remember that not only the actual
function must be activated, but the whole sequence of interconnected functions
(from measuring inputs to binary output contacts), including logic and so on.
Before starting a new test mode session the user should scroll through every
function to ensure that only the function to be tested (and the interconnected ones)
have the parameters
Blocked
and eventually
EvDisable
are set to
No
and
Yes
respectively. Remember that a function is also blocked if the BLOCK input signal
on the corresponding function block is active, which depends on the configuration.
Ensure that the logical status of the BLOCK input signal is equal to 0 for the
function to be tested. Event function blocks can also individually be blocked to
ensure that no events are reported to a remote station during the test. This is done
by setting the parameter
EvDisable
to
Yes
.
Any function is blocked if the corresponding setting in LHMI under
Main menu/Tests/Function test modes
menu remains
On
, that is
the parameter
Blocked
is set to
Yes
and the parameter
TestMode
under the
Main menu/Tests/IED test mode
remains active. All
functions that were blocked or released from a previous test mode
session, that is the parameter
Test mode
is set to
On
, are reset when
a new test mode session is started.
Procedure
1.
Browse to the
Function test modes
menu.
The Function test modes menu is located in LHMI under
Main menu/Tests/
Function test modes
.
2.
Browse to the function instance that should be released.
3.
Set parameter
Blocked
for the selected function to
Yes
.
Section 4
1MRS756801 A
Testing IED operation
26
630 series
Commissioning Manual
