Siemens 7SC80 Manual page 276

Functions
2.14 Automatic Reclosing System 79
Cyclic Control
Control of the overcurrent protection stages takes effect by releasing the cycle marked by the corresponding
parameter. The cycle zone release is signaled by the indications
If the automatic reclosing function is in idle state, the settings for the starting cycle apply. The settings made
here are always in effect when the automatic reclosing system is in idle state.
If you selected IEC, ANSI, or recloser characteristics in the scope of functions for the time overcurrent protec-
tion, you can define one own characteristic type each at Automatic reclosing for the second reclosure, third
reclosure, and fourth-nth reclosure via the parameters 7260 51 IEC 2.C to 7311 67N-T Recl. 4.C. For
this purpose, the associated reclosure setting tabs provide the parameters for the protection elements Phase
non-directional and directional, as well as Ground undirectional and directional. If, for example, for
Charac. Phase DTL/IDMTL: IEC characteristics and at Time overcurrent protection, the characteristic
type Normal Inverse was selected, you can select a different characteristic type for reclosure, for example,
Very Inverse. The characteristic types of the characteristics family specified in the scope of functions (IEC,
ANSI, or recloser) are available. Before the first reclosure, the setting of the characteristic from the respective
protection function applies.
The parameters are released for each following cycle when issuing the close command and starting the
blocking time. Following successful reclosure (blocking time expired) or after returning from blocked condi-
tion, the automatic reclosing function goes into idle state. Control of the protection is again assumed by the
parameters for the starting cycle.
The following figure illustrates the control of the protection elements 50-2 and 50N-2.
276
79 1.CycZoneRel to 79 4.CycZoneRel .
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017