Of2 Protection - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

OF2 Protection

t
f18 OF2
t18
86 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
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.
f
NOTE: the protection is not active for voltages <30V.
Parameters
Here is a list of the available parameters:
Parameter
Enable
Threshold f18
Time t18
OF2 protection has 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 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).
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).
Ekip Touch protection trip unit | 11 - Hi-Touch protections
ABB | SACE Emax 2