ABB | SACE Tmax XT
120 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Test | 1 - Test
Test
1 - Test
Presentation
The test area can be accessed on the display; the commands available in this area allow certain functions of
the Trip unit to be checked; details of all the commands available in the Test menu are given below (page 34).
Ekip T&P with Ekip Connect has a
Test Protections
section where the presence of current or voltage alarm
signals can be simulated and times and trips can be checked.
Autotest
The Autotest command starts an automatic sequence of the display and leds so as to enable their operation
to be checked.
The sequence comprises the following test phases:
1. Screen with message “www.abb.com”.
2. Darkening of the display.
3. Color sequence with red, green, blue bands, with gradual increase of backlighting
4. Lighting up, for one second, of the Warning and Alarm leds.
NOTE:
auxiliary power supply must be present in order to check the gradual increase of
backlighting
Trip Test
Selection of the
Trip test
command accesses the dedicated page where the operator is asked to press the
iTEST
key to confirm the test operation.
An open command is transmitted to the Trip coil of the CB when the key is released.
IMPORTANT:
•
the open command is sent with the circuit-breaker closed and in the absence of current
•
following a command, the user is responsible for checking the effective change in
status of the actuator and the information displayed: make sure that there are no
alarms on the diagnosis bar before performing the test
NOTE: to reset the TRIP signal, go back to the HOME page and press the iTEST
key
or transmit a TRIP RESET command (via Ekip Connect or remotely)
Test CB
Selection of the
Test CB
command accesses a submenu with the
Open CB
and
Close CB
commands.
The commands allow opening coil YO and closing coil YC to be activated, respectively: a window with the
message "Test Executed" confirms that the command has been transmitted correctly.
Correct operation of the entire command system (Trip unit and opening and closing coils) is checked by
opening and closing the circuit-breaker.
IMPORTANT:
•
the open and close commands of the coils only function when the Trip unit is on and
powered by an auxiliary supply
•
make sure that the coils are connected to the supply source
•
release operation is checked by the commands:
coil faults are not detected by the test
