Functions
2.1 General
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
36
Up to four function groups are available for the synchronization function (only one for 7SJ62). The parameters
161 25 Function 1 to 164 25 Function 4 indicate whether a synchronization function is Disabled or
Enabled. The latter is determined by selecting the operating mode ASYN/SYNCHRON (closing takes place for
asynchronous and synchronous conditions) or SYNCHROCHECK (corresponds to the classical synchrocheck
function). 7SJ62 only provides the function SYNCHROCHECK.
For the circuit-breaker maintenance function, several options are available under address 172 52 B.WEAR
MONIT. Irrespective 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 protec-
tion functions.
When selecting the ΣI
x
procedure, the sum of all tripping current powers is formed and issued as a reference
value. The 2P procedure continuously calculates the remaining lifespan of the circuit breaker.
With the I
2
t procedure, the square fault current integrals are formed via arc time and are issued as a reference
value.
For more detailed information about the circuit breaker maintenance procedures, see Section 2.23.2.
At address 181 L-sections FL you can set the number of different line sections (max. three) to be taken
into consideration by the fault locator.
When using trip circuit supervision, address 182 74 Trip Ct Supv allows you to select whether this function
should work with two (2 Binary Inputs) or only one binary input (1 Binary Input) or if the function is
Disabled.
If you want to detect an ambient temperature or a coolant temperature and send the information e.g. to the
overload protection, specify the port to which the RTD-box is connected in address 190 RTD-BOX INPUT. In
7SJ62/64 port C (service port) is used for this purpose; in 7SJ64 it can be either port C (service port) or port D
(additional port). The number and transmission type of the temperature detectors (RTD = Resistance Temper-
ature Detector) can be specified in address191 RTD CONNECTION: 6 RTD simplex or 6 RTD HDX (with one
RTD-box) or 12 RTD HDX (with two RTD-boxes). Implementation examples are given in the Appendix (under
"Connection Examples"). The settings in address 191 have to comply with those at the RTD-box (see Section
2.20.2, side title „RTD-box Settings“).
The flexible protection functions can be configured via the FLEXIBLE FUNC. parameter. Up to 20 functions
can be created. This is done by setting checkmarks at the functions (see the example in Section 2.18). If the
checkmark of a function is removed, all settings and configurations made previously will be lost. After re-select-
ing the function, all settings and configurations are in default setting. Setting of the flexible function is done in
DIGSI under „Parameters“, „Additional Functions“ and „Settings“. The configuration is done as usual under „Pa-
rameters“ and „Configuration“.
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