Functionality; Operation Principle - ABB RELION 630 Series Technical Manual

Section 3
Basic functions
3.13.2
3.13.3
74

Functionality

When the Test mode functionality TESTMODE is activated, all the protection
functions in the IED are automatically blocked. It is then possible to unblock every
function(s) individually from the LHMI to perform the required tests.
When leaving TESTMODE, all blockings are removed and the IED resumes normal
operation. However, if during TESTMODE operation, power is removed and later
restored, the IED remains in TESTMODE with the same protection functions blocked
or unblocked as before the power was removed. All testing is done with the actually
set and configured values within the IED. No settings are changed to avoid mistakes.

Operation principle

IED functions can be tested in test mode. The IED can be set to test mode either by
activating the input SIGNAL on the function block TESTMODE, or setting TestMode
to "On" in the LHMI.
When the IED is in test mode, the ACTIVE of the function block TESTMODE is
activated. The outputs of the function block TESTMODE show the cause of the Test
mode is set to "On" state, that is, input from configuration (OUTPUT output is
activated) or setting from LHMI (SETTING output is activated).
When the IED is in test mode, the yellow STARTLED flashes and all functions are
blocked. Any function can be unblocked individually regarding functionality and
event signalling.
Forcing of binary output signals is only possible when the IED is in test mode.
Most of the IED functions can be individually blocked by local HMI settings. To
enable blockings, the IED must be in test mode (output ACTIVE is activated). When
leaving the test mode and entering the normal mode, the blockings are disabled and
everything is set to normal operation. In the test mode, all testing can be done with the
actually set and configured values within the IED. If any setting values are changed
during the testing, they should be changed back to original values before entering the
normal mode.
The blocked functions are still blocked next time entering the test mode, if the
blockings are not reset.
The blocking of a function concerns all the output signals from the actual function, so
no outputs are activated.
When a binary input is used to set the IED in test mode and a parameter
that requires restart of the application, is changed, the IED re-enters
test mode and all functions are blocked, also the functions that were
unblocked before the change. During the re-entering to test mode, all
functions are temporarily unblocked for a short time, which may lead
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