Siemens siprotec 7SA6 User Manual

Functions
6-517SA6 Manual
C53000-G1176-C156-2
current transformers600 A/5 A
voltage transformers110 kV/0.1 kV
The resulting minimum load impedance is therefore:
When applying the settings with a personal computer and DIGSI
®
4 these values may
be entered as primary values. The conversion to secondary values is
when applying a security margin of 10 % the following is set:
primary:
R load (Ø-E) = 97.98 Ω or
secondary:
R load (Ø-E) = 10.69 Ω.
The spread angle of the load trapezoid
ϕ load (Ø-E)(address 1242)andϕ load (Ø-
Ø) (address
1244) must be greater (approx. 5°) than the maximum arising load angle
(corresponding to the minimum power factor cos
ϕ).
Calculation example:
minimum power factor
cos
ϕ
min
=0.63
ϕ
max
=51°
Setting
ϕ load (Ø-E) = ϕ
max
+5°=56°.
6.2.3.3 Settings
Note:
The indicated secondary current values and values of impedance for setting
ranges and default settings refer to I
N
= 1 A. For the nominal current 5 A the current
values are to be multiplied by 5. The values of impedance are divided by 5.
Addresses which have an „A“ attached to its end can only be changed with DIGSI
®
4
in “
Additional Settings“.
R
Load prim
U
min
3 I
Lmax
⋅
-------------------------
0.9 110 kV⋅
3 525 A
⋅
--------------------------
108.87 Ω== =
R
Load sec
N
CT
N
VT
----------
R
Load prim
⋅
600 A/5 A
110kV/0.1kV
--------------------------------------
108.87 Ω⋅ 11.88 Ω== =
Addr. Setting Title Setting Options Default Setting Comments
1201 FCT Distance ON
OFF
ON Distance protection is
1202 Minimum Iph> 0.10..4.00 A 0.10 A Phase Current threshold for
dist. meas.
1215 Paral.Line Comp NO
YES
YES Mutual coupling parall.line
compensation
1232 SOTF zone with Pickup (non-directional)
with Zone Z1B
Inactive
Inactive Instantaneous trip after Swit-
chOnToFault
1241 R load (Ø-E) 0.100..250.000 Ohm; ∞∞Ohm R load, minimum Load Impe-
dance (ph-e)

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English