AZT-9
ZPrAE Sp. z o.o.
19
4.14. Energy storage test.
If the AZT-9 device is equipped with an optional MTT-10 test module it is possible to
check the energy storage condition directly from the device panel.
To perform the test change the position of the main MTT-10 module switch into the
“TEST” position. In this position the outputs of energy storages are disconnected from the
switch off coil of the circuit breaker and switched over to an external load of MTT-10
module which prevents accidental operation of the circuit breaker during the test.
After selecting the “Perform storage test” option and pressing button a message
will be displayed which indicates that it is necessary to change the position of the main
MTT-10 module switch into TEST position and enter the password. A window asking to
confirm the energy storage test will then be displayed. Activation of storages takes place
after confirming the message and holding down button for 5 seconds. If the condition of
storages is good “Storage 1 OK” and “Storage 2 OK” LEDs will be on after the test is
completed. If the condition of any storage is bad a respective LED will remain off.
Thanks to the test connectors on the front panel which are connected to current
inputs (connector no. 1…8) and storage outputs (connector no. 9…11) the MTT-10 module
enables performance of extensive tests of protection functions without the need to modify
cabling of ATZ-9 device. In the “TEST” position external current circuits are closed and the
test terminals of MTT-10 module are connected to the measurement current inputs of the
protection device. Thanks to the additional switch “auxiliary power supply” at the bottom
part of the MTT-10 module it is possible to disconnect the auxiliary power supply to check
the autonomous power supply of the device using current circuit of the testing device.
Warning!
Execution of energy storage test without the MTT-10 module installed or its
execution in the “OPERATION” position will lead to the actuation of the main circuit
breaker.
