Settings - Siemens 7SC80 Manual

The time multiplier can also be set to ∞. After pickup the element will then not trip. Pickup, however, will be
signaled. If the inverse time element is not required at all, address 140 46 should be set to Definite Time
during the configuration of protection functions (Section
ANSI Curves (Inverse Time Tripping Curve)
Behavior of a machine due to negative sequence current can be closely replicated by means of an inverse time
tripping curve. In address 4007 the 46 ANSI CURVE, select out of four ANSI curves provided by the device
the curve which is most similar to the thermal unbalanced load curve provided by the manufacturer. The trip-
ping curves of the protective relay, and the formulas on which they are based, are given in the Technical Data.
It must be noted that a safety factor of about 1.1 has already been included between the pickup value and the
setting value when an inverse time characteristic is selected. This means that a pickup will only occur if an
unbalanced load of about 1.1 times the setting value is present. If Disk Emulation was selected at address
4011 46-TOC RESET, reset will occur in accordance with the reset curve as described in the Functional
Description.
The unbalanced load value is set at address 4008 46-TOC PICKUP. The corresponding time multiplier is
accessible via address 4009 46-TOC TIMEDIAL.
The time multiplier can also be set to ∞. In this case, the element will not trip after pickup. However, pickup,
will be signaled. If the inverse time element is not required at all, address 140 46 should be set to Definite
Time during configuration of the protection functions (Section

Settings

2.9.4
Addresses which have an appended "A" can only be changed with DIGSI, under "Additional Settings".
The table indicates region-specific presettings. Column C (configuration) indicates the corresponding secon-
dary nominal current of the current transformer.
Addr. Parameter
4001 FCT 46
4002 46-1 PICKUP
4003 46-1 DELAY
4004 46-2 PICKUP
4005 46-2 DELAY
4006 46 IEC CURVE
4007 46 ANSI CURVE
4008 46-TOC PICKUP
4009 46-TOC TIMEDIAL
4010 46-TOC TIMEDIAL
4011 46-TOC RESET
4012A 46 T DROP-OUT
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
C Setting Options
OFF
ON
1A 0.10 .. 3.00 A
5A 0.50 .. 15.00 A
0.00 .. 60.00 sec; ∞
1A 0.10 .. 3.00 A
5A 0.50 .. 15.00 A
0.00 .. 60.00 sec; ∞
Normal Inverse
Very Inverse
Extremely Inv.
Long Inverse
Extremely Inv.
Inverse
Moderately Inv.
Very Inverse
1A 0.10 .. 2.00 A
5A 0.50 .. 10.00 A
0.50 .. 15.00 ; ∞
0.05 .. 3.20 sec; ∞
Instantaneous
Disk Emulation
0.00 .. 60.00 sec
2.9 Negative Sequence Protection 46
2.1.1.2 Setting Notes).
2.1.1.2 Setting Notes).
Default Setting Comments
OFF 46 Negative Sequence
Protection
0.10 A 46-1 Pickup
0.50 A
1.50 sec 46-1 Time Delay
0.50 A 46-2 Pickup
2.50 A
1.50 sec 46-2 Time Delay
Extremely Inv. IEC Curve
Extremely Inv. ANSI Curve
0.90 A 46-TOC Pickup
4.50 A
5.00 46-TOC Time Dial
0.50 sec 46-TOC Time Dial
Instantaneous 46-TOC Drop Out
0.00 sec 46 Drop-Out Time Delay
Functions
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