ABB | SACE Emax 2
72 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Ekip Touch protection trip unit | 9 - Touch protections
Continued from the previous page
Protection blocks
With Ekip Connect software six blocks are available for some protections, useful for deactivating the protection
based on programmable events.
In particular, four blocks are associated with the programmable states A, B, C and D:
• BlockOnProgStatusA
• BlockOnProgStatusB
• BlockOnProgStatusC
• BlockOnProgStatusD
One block is associated to the startup (present for protections that have a StartUp function):
• BlockOnStartUp
and one block, not present for frequency protections, is associated with the checking of the measured
frequency:
• BlockOnOutOfFrequency
Each block is independent and has its own activation command (Block On).
The protection is deactivated for a time equal to the duration of the event itself:
• If the programmed event occurs (true), in the case of state-based blocks.
• If the StartUp function is active and the startup threshold is exceeded (block active for the startup time
that has been set), in the case of blocking from StartUp.
• If at least one frequency measured is outside the range 30…80 Hz, in the case of a frequency-based block.
IMPORTANT: the blocks can cause:
•
Increase of the tripping times of the protections (max: + 30 ms), due to the occurrence
of the event in question (example: frequency check).
•
undesired deactivation of the protection, if the block is associated to states or signals
from modules on the local bus and the auxiliary power supply is absent. In this case,
it can be useful to program the event also taking account of the state of the auxiliary
power supply (Supply from Vaux).
•
undesired deactivation of the protection, if the block is associated to frequency
measurements, and the voltage is less than the minimum calculation threshold (30 or
60 V, see page
).
IMPORTANT: during startup, if the function is activated, the blocks are deactivated.
Содержание SACE Emax E1.2
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