Siemens 7SJ85 - Information List; Usage Information for Detection of Intermittent Ground Faults

Addr. Parameter C Setting Options Default Setting
_:13021:10 Trans.Gnd.flt1:Blk. by
meas.-volt. failure
•
no
•
yes
yes
_:13021:107 Trans.Gnd.flt1:Blk. after
fault extinction
•
no
•
yes
yes
_:13021:108 Trans.Gnd.flt1:Operate
functionality
•
no
•
yes
no
_:13021:106 Trans.Gnd.flt1:Direc-
tional mode
•
forward
•
reverse
forward
_:13021:103 Trans.Gnd.flt1:V0>
threshold value
0.300 V to 200.000 V 15.000 V
_:13021:105 Trans.Gnd.flt1:Maximum
operational V0
0.300 V to 200.000 V 3.000 V
_:13021:104 Trans.Gnd.flt1:3I0>
threshold value
1 A @ 100 Irated 0.000 A to 35.000 A 0.030 A
5 A @ 100 Irated 0.00 A to 175.00 A 0.15 A
1 A @ 50 Irated 0.000 A to 35.000 A 0.030 A
5 A @ 50 Irated 0.00 A to 175.00 A 0.15 A
1 A @ 1.6 Irated 0.000 A to 1.600 A 0.030 A
5 A @ 1.6 Irated 0.000 A to 8.000 A 0.150 A
_:13021:6 Trans.Gnd.flt1:Operate
delay
0.00 s to 60.00 s 0.50 s
_:13021:7 Trans.Gnd.flt1:Dropout
delay
0.00 s to 60.00 s 0.00 s
Information List
No.
Information Data Class
(Type)
Type
Trans.Gnd.flt1
_:13021:81 Trans.Gnd.flt1:>Block stage SPS I
_:13021:54 Trans.Gnd.flt1:Inactive SPS O
_:13021:52 Trans.Gnd.flt1:Behavior ENS O
_:13021:53 Trans.Gnd.flt1:Health ENS O
_:13021:302 Trans.Gnd.flt1:Ground fault ACD O
_:13021:55 Trans.Gnd.flt1:Pickup ACD O
_:13021:56 Trans.Gnd.flt1:Operate delay expired ACT O
_:13021:57 Trans.Gnd.flt1:Operate ACT O
Usage Information for Detection of Intermittent Ground Faults
The stage type 3I0> with cos φ or sin φ measurement is suited for directional detection of intermittent
ground faults. Many years of field experience and field tests have shown that the direction determination of
this stage type reliably determines the direction of the current peaks. Between the current peaks, the direction
is detected as unknown . To generate a tripping or an alarm, you can analyze the individual pickups of a stage
(each directional pickup corresponds to a current peak) in a time-based way or count them via an additional
user logic (CFC chart).
You can also ensure the result in the user logic via a 2nd directional stage that works in the backward direc-
tion, as well as a V0 stage.
You can operate a 3rd directional stage in parallel for detection of permanent ground faults.
6.15.5.4
6.15.6
Protection and Automation Functions
6.15 Sensitive Ground-Fault Detection
SIPROTEC 5, Overcurrent Protection, Manual 585
C53000-G5040-C017-8, Edition 07.2017