Settings - Siemens 7SC80 Manual

Functions
2.8 27/59 Under/Over Voltage for Vx
Select the time settings in such a way that admissible brief voltage peaks generated during switching opera-
tions do not generate a tripping and that stationary overvoltages can be tripped in time.
The dropout thresholds are set at the following addresses:
59-1 Vx DOut R. Address 395
59-2 Vx DOut R. Address 396
The minimum hysteresis is 0.6 V.
Undervoltage Protection
Undervoltage protection includes two elements.
You can set the pickup thresholds at the following addresses:
27-1 Vx Pickup
27-2 Vx Pickup
The times for tripping delay are set at the following addresses:
27-1 Vx Delay
27-2 Vx Delay
The time settings should be selected in such a way that tripping occurs in case of voltage dips that lead to
unstable operating conditions. On the other hand, time delays should be long enough to avoid tripping due to
momentary voltage dips.
The dropout thresholds are set at the following addresses:
27-1 Vx DOut R. Address 385
27-2 Vx DOut R. Address 386
The minimum hysteresis is 0.6 V.

Settings

2.8.3
Addresses which have an appended "A" can only be changed with DIGSI, under "Additional Settings".
Addr. Parameter
380 27 Vx
381 27-1 Vx Pickup
382 27-2 Vx Pickup
383 27-1 Vx Delay
384 27-2 Vx Delay
385A 27-1 Vx DOut R.
386A 27-2 Vx DOut R.
390 59 Vx
391 59-1 Vx Pickup
392 59-2 Vx Pickup
393 59-1 Vx Delay
394 59-2 Vx Delay
395A 59-1 Vx DOut R.
396A 59-2 Vx DOut R.
206
Address 381
Address 382
Address 383
Address 384
Setting Options
OFF
ON
Alarm Only
10 .. 120 V
10 .. 120 V
0.00 .. 60.00 sec; ∞
0.00 .. 60.00 sec; ∞
1.01 .. 3.00
1.01 .. 3.00
OFF
ON
Alarm Only
20 .. 150 V
20 .. 150 V
0.00 .. 60.00 sec; ∞
0.00 .. 60.00 sec; ∞
0.90 .. 0.99
0.90 .. 0.99
Default Setting Comments
OFF 27 Undervoltage prot. for Vx
35 V Undervoltage Vx< pickup
30 V Undervoltage Vx<< pickup
0.50 sec Undervoltage Vx< delay time
0.50 sec Undervoltage Vx<< delay time
1.20 27-1 Vx Dropout Ratio
1.20 27-2 Vx Dropout Ratio
OFF 59 Overvoltage prot. for Vx
140 V Overvoltage Vx> pickup
145 V Overvoltage Vx>> pickup
0.50 sec Overvoltage Vx> delay time
0.50 sec Overvoltage Vx>> delay time
0.95 59-1 Vx Dropout Ratio
0.95 59-2 Vx Dropout Ratio
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017