ABB Relion 670 series, Technical Reference Manual

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restored, the IED will remain in TESTMODE with the same protection functions
blocked or unblocked as before the power was removed. All testing will be done with
actually set and configured values within the IED. No settings will be changed, thus
mistakes are avoided.
4.6.2 Principle of operation
Put the IED into test mode to test functions in the IED. Set the IED in test mode by
• configuration, activating the input SIGNAL on the function block TESTMODE.
• setting TestMode to Enabled in the local HMI, under Main menu/TEST/IED test
mode .
While the IED is in test mode, the ACTIVE of the function block TESTMODE is
activated. The other outputs of the function block TESTMODE shows the cause of the
"Test mode:
Enabled " state — input from configuration (OUTPUT output is activated)
or setting from local HMI (SETTING output is activated).
While the IED is in test mode, the yellow PICKUP LED will flash and all functions are
blocked. Any function can be unblocked individually regarding functionality and event
signalling.
Most of the functions in the IED can individually be blocked by means of settings from
the local HMI. To enable these blockings the IED must be set in test mode (output
ACTIVE is activated), see example in figure
33 . When leaving the test mode, that is
entering normal mode, these blockings are disabled and everything is set to normal
operation. All testing will be done with actually set and configured values within the
IED. No settings will be changed, thus no mistakes are possible.
The blocked functions will still be blocked next time entering the test mode, if the
blockings were not reset.
The blocking of a function concerns all output signals from the actual function, so no
outputs will be 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
will re-enter test mode and all functions will be blocked, also functions
that were unblocked before the change. During the re-entering to test
mode, all functions will be temporarily unblocked for a short time,
which might lead to unwanted operations. This is only valid if the IED
is put in TEST mode by a binary input, not by local HMI.
The TESTMODE function block might be used to automatically block functions when
a test handle is inserted in a test switch. A contact in the test switch (RTXP24 contact
Section 4
1MRK505222-UUS C
Basic IED functions
100
Technical reference manual