ABB | SACE Emax 2
86 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
Ekip Touch protection trip unit | 11 - Hi-Touch protections
OF2 Protection
f18
t
t18
f
OF2
Path
Main page - Menu - Advanced
Function
OF2 protection:
• It trips when the line frequency rises above the set threshold, like the OF protection.
• It is independent from OF 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 OF and trip
with OF2, or vice versa, or OF and OF2 both for signalling or trip).
If the line frequency rises above the activation threshold, the protection trips within a fixed time set by the
user.
NOTE:
the protection is not active for voltages <30V.
Parameters
Here is a list of the available parameters:
Parameter
Description
Enable
To activate/deactivate the protection.
Threshold f18
It defines the frequency value above which the protection is activated (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 (Hertz) and a relative value (fn,
nominal value defined on the trip unit).
Time t18
The delay time between the exceeding of the f18 threshold and the sending of
the opening command (with reference to the figure above, the threshold is the
part of the curve parallel to the x-axis).
OF2 protection has
StartUp enable
, see page 88.
Via Ekip Connect it is also possible to access the
blocking functions
, see page 72.
Summary of Contents for SACE Emax E1.2
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