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For the elements associated with non-directional overcurrent protection 50(N), 51(N) (phase and ground),
various tripping characteristics can be selected at addresses 112 Charac. Phase and 113 Charac.
Ground. If only the definite time Curve is desired, select Definite Time. Alternatively, you can select
between inverse-time curves according to IEC standard (TOC IEC) or ANSI standard (TOC ANSI). The dropout
behavior of the IEC and ANSI curves is specified at address 1210 or 1310 when configuring the time overcur-
rent protection.
Set to Disabled to disable the entire time overcurrent protection.
The direction overcurrent protection Ground is set at 11667N/67N-TOC. Here, the same options are available
as for non-directional overcurrent protection (except the 50N-3 element).
For (sensitive) ground fault detection address 130 S.Gnd.F.Dir.Ch lets you specify the directional charac-
teristic of the sensitive ground fault detection. You can select between cos ϕ / sin ϕ and V0/I0 ϕ mea.
as the measurement procedure. The cos ϕ / sin ϕ procedure (via residual wattmetric current detection) is
set by default.
If the measuring method cos ϕ / sin ϕ is set, select between a definite time characteristic (Definite
Time) and an inverse time characteristic User Defined PU at address 131 Sens. Gnd Fault. V0/I0 ϕ
mea. provides the definite time characteristic Definite Time, inverse time characteristics TOC IEC or TOC
ANSI. When selecting the setting Disabled, the entire function is disabled.
For the intermittent ground fault protection, you can specify the measured quantity (with Ignd, with 3I0 or
with Ignd,sens.) to be used by this protection function at address 133 INTERM.EF.
At address 134 Dir. Interm. EF you can set the directional intermittent ground fault protection to Enabled
or Disabled.
For unbalanced load protection, address 140 46 allows you to specify which tripping characteristics to use. You
can select between Definite Time, TOC ANSI or TOC IEC. If this function is not required, select Disabled.
For overload protection, you can determine at address 142 49 whether the function operates with or without
ambient temperature (With amb. temp. or No ambient temp) or whether the entire function is Disabled.
In address 170 you can set the breaker failure protection to Enabled or Disabled. The setting option
enabled w/ 3I0> subjects the ground current and the negative sequence current to a plausibility check.
For the CB maintenance functions, several options are available under address 172 52 B.WEAR MONIT. Ir-
respective of this, the basic functionality of the summation current formation (ΣI procedure) is always active. It
requires no further configurations and adds up the tripping currents of the trips initiated by the protection func-
tions.
When selecting the ΣI
value. The 2P Procedure continuously calculates the remaining lifespan of the circuit breaker.
2
With the I
t Procedure the square fault current integrals are formed via arc time and output as a reference
value.
Further information concerning the individual procedures of the CB maintenance are given in Section 2.20.2.
You can also disable this function by setting it to Disabled.
Under address 182 74 Trip Ct Supv it can be selected whether the trip-circuit supervision works with two
(2 Binary Inputs) or only one binary input (1 Binary Input), or whether the function is configured
Disabled.
If you have set the function to Enabled at address 190 RTD INPUT, you can specify the number and the trans-
mission type of the measuring points (RTD = Resistance Temperature Detector) at address 191 RTD
CONNECTION. When connecting an RTD box to the serial port B, set 12 RTD HDX. When connecting an RTD
box to port A, select 12 RTD Eth. If the connection is made via the I/O-2 module, select the setting
Int.Temp.Meas.. The Appendix provides some implementation examples in the section „Connection Exam-
ples"). The settings in address have to comply with those at the RTD box (see Section 2.17.2, side title „RTD
box Settings").
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A5, Release date 11.2012
x
-Procedure, the sum of all tripping current powers is formed and output as reference
Functions
2.1 General
31
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