ABB SACE Emax 2 Series - Protection UF2

ABB | SACE Emax 2
106 | © 2013 ABB | 1SDH001000R0002 - L7804
Ekip Touch protection release | 11 - Hi-Touch protections
Protection UF2
f17
t
t17
f
UF2
Path
Main page - Menu - Advanced protections
Function
Protection UF:
• Trips when the line frequency drops below the set threshold, like the protection UF.
• It is independent from the UF protection: dual protection of type UF allows you to widen
the level of protection against drops in frequency.
If the line frequency drops below the activation threshold, the protection trips within a fixed
time set by the user.
Parameters
The following is a description of the parameters:
Parameter Description
Enabling Activates/deactivates the protection.
Threshold (f17)
Defines the frequency value below 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).
Time (t17)
The delay time between the exceeding of the f17 threshold and the
sending of the opening command (in reference to the curve, it is
the part parallel to the abscissa).
Protection UF2 has Trip Enable, see page 109.