ABB eVM1 Installation And Service Instructions Manual page 61

Fig. 47
When the Block signal is active the protections to be blocked are reset, put in PASSIVE status
and are temporarily disabled; all internal registers and timers are cleared. The protection function
will then remain in the idle state until the Block signal goes low.
When the Block signal disappears the blocked protections are re-enabled.
Blocking a protection function always implies a delay in protection operation; only when the block
Note
signal is released does the protection become active and, if the start conditions are true, begins to
count. After the block release, the set protection time delay has to expire before the protection trips.
BLOCK from Motor Start protection
Each active protection function can be blocked by the Motor Start protection in the Motor Start
configuration pop-up window.
The active protections have a selectable box. When the Motor Start protection enters the START
status all the ticked protection functions will be put into PASSIVE status and are temporarily
disabled; all internal registers and timers are cleared.
In the example below, the Motor Start blocks overcurrent protection DT1.
Fig. 48
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