S2 Protection - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

S2 Protection

t
S2
I5
t5
82 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Path
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Function
S2 protection:
• It protects against a selective short circuit, as the S function.
• It is independent from S protection: it is therefore possible to program thresholds and functions of the two
protections in order to have different installation solutions (for example: signalling with S and trip with S2,
or vice versa, or S and S2 both for signalling or trip).
When the activation threshold is exceeded, the protection trips within a fixed time. The user can set the
threshold and the tripping time.
I
Parameters
Here is a list of the available parameters:
Parameter
Enable
Threshold I5
Time t5
S2 protection has Trip Enable, Zone Selectivity, Startup Enable, see page 88.
Via Ekip Connect it is also possible to access the blocking functions, see page 72.
Description
To activate/deactivate the protection.
It defines the current value that activates the protection when exceeded (with
reference to the figure above, the threshold is the part of the curve parallel to
the y-axis).
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 gives 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.
Ekip Touch protection trip unit | 11 - Hi-Touch protections
ABB | SACE Emax 2