Protection Of2 - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

Protection OF2

t
f18
OF2
t18
107 | © 2013 ABB | 1SDH001000R0002 - L7804
Path
Main page - Menu - Advanced protections
Function
Protection OF2:
• Trips when the line frequency rises above the set threshold, like the protection OF.
• It is independent from the OF protection: dual protection of type OF allows you to widen
the level of protection against frequency peaks.
If the line frequency rises above the activation threshold, the protection trips within a fixed time
set by the user.
f
Parameters
The following is a description of the parameters:
Parameter
Enabling
Threshold (f18)
Time (t18)
Protection OF2 has Trip Enable, see page 109.
Description
Activates/deactivates the protection.
Defines the frequency value above which the protection is
activated (in reference to the curve, it is the part parallel to the
ordinate).
It is represented both as an absolute value (Hertz) and a relative
value (Fn, nominal value defined on the release).
The delay time between the exceeding of the f18 threshold and the
sending of the opening command (in reference to the curve, it is
the part parallel to the abscissa).
ABB | SACE Emax 2
Ekip Touch protection release | 11 - Hi-Touch protections