Siemens 7SC80 Manual page 129

signaled. If the 67-1 element is not required at all, the pickup value 67-1 PICKUP should be set to ∞. This
setting prevents from tripping and the generation of a pickup message.
Directional Overcurrent Element 67N-1 (ground)
The pickup value 1604 67N-1 PICKUP of the 67N-1 overcurrent element should be set below the minimum
anticipated ground fault current.
The delay is set at address 1605 67N-1 DELAY and should be based on system coordination requirements for
directional tripping. For ground currents in a grounded system a separate coordination chart with short time
delay is often used.
The selected time is only an additional time delay and does not include the operating time (measuring time,
dropout time). The delay can be set to ∞. After pickup the element will then not trip. Pickup, however, will be
signaled. If the 67N-1 element is not required at all, the pickup value 67N-1 PICKUP should be set to ∞. This
setting prevents from tripping and the generation of a pickup message.
Pickup Stabilization (67/67N Directional)
The pickups can also be stabilized via parameterizable dropout times under address 1518 67 T DROP-OUT or
1618 67N T DROP-OUT.
Directional Element 67-TOC with IEC, ANSI or Recloser Characteristics (phases)
Having set address 115 67/67-TOC = TOC IEC, TOC ANSI or Recloser Curves when configuring the
protection functions (Section
also be available.
If address 115 67/67-TOC was set to TOC IEC, you can select the desired IEC characteristic (Normal
Inverse, Very Inverse, Extremely Inv. or Long Inverse) at address 1511 67- IEC CURVE.
If address 115 67/67-TOC was set to TOC ANSI, you can select the desired ANSI characteristic (Very
Inverse, Inverse, Short Inverse, Long Inverse, Moderately Inv., Extremely Inv. or Defi-
nite Inv.) at address 1512 67- ANSI CURVE.
If address 115 67/67-TOC was set to Recloser Curves, you can select the desired Recloser characteristic
(Curve A (101), Curve B (117), Curve C (133), Curve D (116), Curve E (132), Curve K
(162), Curve N (104), Curve R (105), Curve W (138), Curve 2 (135), Curve 3 (140), Curve
8 (113), Curve 8* (111), Curve 9 (131) or Curve 11 (141))) at address 1526 Recloser
Curves.
If the inverse time tripping characteristic is selected, it must be noted that a safety factor of about 1.1 has
already been included between the pickup value and the setting value. This means that a pickup will only
occur if a current of about 1.1 times the setting value is present. If Disk Emulation was selected at address
1510 67-TOC Drop-out, reset will occur in accordance with the reset curve as described in Section
2.2 Overcurrent Protection 50, 51, 50N,
The current value is set in address 1507 67-TOC PICKUP. The setting is mainly determined by the maximum
anticipated operating current. Pickup due to overload should never occur since in this mode, the device oper-
ates as fault protection with correspondingly short tripping times and not as overload protection.
The corresponding time multiplier for an IEC or Recloser characteristic is set at address 1508 67 TIME DIAL
and in address 1509 67 TIME DIAL for an ANSI characteristic. It must be coordinated with the time coordi-
nation chart of the system.
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 67-TOC element is not required at all, address 115 67/67-TOC should be set to Defi-
nite Time during protection function configuration (see Section
Directional Elements 67-TOC-1, 67-TOC-2, 67-TOC-3, 67-TOC-4 with All Curves Characteristics (phases)
Having set address 115 67/67-TOC = All Curves when configuring the protection functions (Section
2.1.1.2 Setting
curve type IEC, ANSI, or Recloser indivitually. For each element, you select one of tree parameters. The other
two parameters must be set to NO.
For example, for the element 67-TOC-1 you can select:
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
2.1.1 Functional
51N. Recloser curves don't support disk emulation.
Notes), the elements 51-1, 51-2, 51-3, 51-4 are available. For each element, you can select the
2.3 Directional Overcurrent Protection 67, 67N
Scope), the parameters for the inverse time characteristics will
2.1.1 Functional
Functions
Scope).
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