Siemens 7SJ85 - Page 1450

Threshold value
81
1 A @ 50 and 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
1 A @ 1.6 Irated 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Dropout Disk emulation
Instantaneous
-
Time multiplier 0.05 to 15.00 Increments of 0.01
Number of value pairs for the operate characteristic
curve
2 to 30 Increments of 1
X values of the operate curve 1.00 p.u. to 66.67 p.u. Increments of 0.01 p.u.
Y values of the operate curve 0.00 s to 999.00 s Increments of 0.01 s
Number of value pairs for the dropout characteristic
curve
2 to 30 Increments of 1
X values of the dropout characteristic curve 0.05 p.u. to 0.95 p.u. Increments of 0.01 p.u.
Y values of the dropout characteristic curve 0.00 s to 999.00 s Increments of 0.01 s
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout 95 % of 1.1 ⋅ threshold value
Minimum absolute dropout differential
Protection-class current transformer 15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Reset of the Integration Timer
Instantaneous
With dropout
Disk emulation Approx. < 0.90 ⋅ threshold value
Direction Determination
Type
With healthy voltages
With voltage memory 2 s
Forward range V
ref,rot
±88°
Dropout differential forward/reverse range 1°
Directional sensitivity Unlimited for 1-phase and 2-phase short circuits
Dynamically unlimited, stationary for 3-phase short
circuits
Approx. 13 V phase-to-phase
Times
Operate time with time delay = 0 ms
Approx. 37 ms + OOT
82
at 50 Hz
Approx. 22 ms + OOT at 60 Hz
Extension of the operate time during operation with
transformer inrush-current detection
Approx. 10 ms
81
If you have selected the method of measurement = RMS value, do not set the threshold value under 0.1 l
rated,sec
.
82
OOT (Output Operating Time): additional delay of the output medium used, for example 5 ms with fast relays
Technical Data
12.8 Directional Overcurrent Protection, Phases
1450 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017