ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

ABB | SACE Emax 2
Ekip Touch protection release | 13 - G Hi-Touch protections
121 | © 2013 ABB | 1SDH001000R0002 - L7804
Protection RQ2
Q24; Q25; Kq; Kq2
t
t24
RQ2
Q24; Q25; Kq; Kq2
Path
Main page - Menu - Advanced protections
Function
Protection RQ2:
• It protects against the reversal of reactive power, with an adjustable threshold according
to the active power value.
• It is a variant of the RQ protection available with Ekip G Hi-Touch releases.
When the reverse reactive power drops below activation threshold, the protection trips within
a fixed time t24.
The parameters Q24 and Q25, with the respective constants Kq and Kq2, allow you to
characterize the response curve with a dynamic behavior.
In particular, the adjustment of the constants Kq and Kq2 allows you to vary the tripping
threshold of the protection: with Kq and Kq2 = 0 the threshold is constant, while with Kq and
Kq2 different to 0 the threshold has a slope, as illustrated in the following image.
Q
P
kq2 kq
Q25
Q24
TRIP
Parameters
It is possible to modify various parameters:
Parameter Description
Enabling Activates/deactivates the protection.
Threshold (Kq) It defines the course (slope) of the protection function.
Threshold (Kq2) It defines the course (slope) of the protection function.
Threshold (Q24)
Defines the reactive power value for which the protection is
activated.
It is represented both as an absolute value (kVAR) and a relative
value (Sn, referring to the rated voltage set on the release).
NOTE: the threshold expressed in Sn is preceded by the
sign “- “ in order to indicate that it refers to reverse power.
Threshold (Q25)
Defines the reactive power value for which the protection is
activated.
It is represented both as an absolute value (kVAR) and a relative
value (Sn, referring to the rated voltage set on the release).
NOTE: the threshold expressed in Sn is preceded by the
sign “- “ in order to indicate that it refers to reverse power.
Time (t24)
This is the delay time between the exceeding of the tripping
threshold and the sending of the opening command
Protection RQ2 has Trip Enable, see page 93.

ABB SACE Emax 2 Series Specifications

General

Breaking capacity	Up to 150kA
Number of poles	3 or 4 poles
Communication protocols	Modbus, Profibus
Standards	IEC 60947-2
Type	Air circuit breaker
Mounting	Fixed, Withdrawable