Functions
6-377SA6 Manual
C53000-G1176-C156-2
settings which determine the geometry of the current/voltage characteristic. The an-
gle-dependent area which is shaded dark grey within the short-circuit angle area can
either have an effect in forward direction (in direction of line) or in both directions (set-
table).
Figure 6-20 U/I/ϕ characteristic
Loop pick-up will drop off if the signal falls below 95 % of the respective current value
or exceeds 105 % of the respective voltage value. A hysteresis of 5° applies to phase-
angle measuring.
Pickup Modes As the U/I/ϕ fault detection represents an extension of the U/I fault detection according
to Section 6.2.2.2 the same program options apply. Tables 6-3 to 6-6 also apply for
single–phase pick-up.
6.2.2.4 Applying the Function Parameter Settings
Pickup Mode
Depending on the ordered version, the 7SA6 distance protection has a series of pick-
up modes from which the one matching the respective network conditions best can be
selected (also see order data in the Appendix).
If the device does not have an explicit pick-up function or, if you set
DIS ANR = Im-
pedance
(address 114) for pick-up type when configuring the protection functions
(Section 5.1), all settings dealt with in this section are irrelevant and cannot be select-
ed.
Available pick-up modes are described in Section 6.2.2.1 and 6.2.2.2 in detail. If the
device has several alternative pick-up modes, one option has been selected when
configuring in address
114 (see Section 5.1). Below, parameters are given and dis-
cussed for all pick-up modes. With the following settings, only those parameters will
appear that apply for the selected pick-up mode.
With the U/I(/
ϕ) pick-up mode you have the option to determine the voltage measuring
and, if applicable, the phase-angle measuring for phase–to–earth measuring units,
123
10
20
30
40
50
60
U
V
I
I
N
U(Iϕ>)
U(I>>)
U(I>)
Iph> Iϕ> Iph>>
Short-circuit angle
area ϕ>
Load area
Short-circuit
area at ϕ<
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