Protection Rv; Protection Rq - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

Protection RV

t
RV
U22
t22

Protection RQ

RQ
Q24; Q25; Kq; Kq2
t24
Q24; Q25; Kq; Kq2
113 | © 2013 ABB | 1SDH001000R0002 - L7804
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Function
The protection RV protects against loss of insulation (residual voltage).
NOTE: the protection is activated and available for four-pole circuit-breakers or three-
pole circuit-breakers equipped with an external Neutral.
When the residual voltage exceeds the activation threshold U22, the protection trips within a
fixed time t22.
V
Parameters
It is possible to modify various parameters:
Parameter
Enabling
Threshold (U22)
Time (t22)
Protection RV has Trip Enable, see page 93.
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t
Function
The protection RQ protects against the reversal of reactive power, with an adjustable threshold
according to the parameter Sn (= √3 x Vn x In).
When the reverse reactive power drops below activation threshold Q24, the protection trips
within a fixed time t24.
Adjustment of the constant Kq allows you to vary the tripping threshold of the protection: with
Kq = 0 the threshold is constant, while with Kq different to 0 the threshold has a slope, as
illustrated in the following image.
Description
Activates/deactivates the protection.
It defines the voltage value that if exceeded activates the
protection (in reference to the curve, it is the part parallel to the
ordinate).
It is represented both as an absolute value (Volts) and a relative
value (Vn, nominal value defined on the release).
This is the delay time between the exceeding of the U22 threshold
(determined by the voltage value read) and the sending of the
opening command (in reference to the curve, t22 affects the entire
curve, moving it along the vertical axis).
Q
TRIP
ABB | SACE Emax 2
P
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Ekip Touch protection release | 12 - G Touch protections