Protection S2 - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

Protection S2

t
S2
I5
t5
103 | © 2013 ABB | 1SDH001000R0002 - L7804
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Function
The protection S2:
• It protects against a selective short circuit, as for the function S.
• This is independent of protection S: dual protection of type S allows you to widen the level
of protection against a selective short circuit.
When the activation threshold is exceeded, the protection trips within a fixed time. The user
can set the activation threshold and the tripping time.
I
Parameters
The following is a description of the parameters:
Parameter
Enabling
Threshold (I5)
Time (t5)
Protection S2 has Trip Enable, Zone Selectivity, Startup Enable, see page 109.
Description
Activates/deactivates the protection.
It defines the current value that if exceeded activates the protection
(in reference to the above curve, it is the part of the curve parallel
to the ordinate).
It is represented both as an absolute value (Ampere) and as a
relative value (In, nominal value defined by the Rating Plug).
IMPORTANT: The I5 threshold set must be higher than
the I1 threshold. An incorrect configuration returns
an error on the display and the programming session
doesn't conclude, with consequent rejection of the
changes made to the parameters.
This is the delay time between the exceeding of the I5 threshold
and the sending of the opening command
ABB | SACE Emax 2
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