The Interface Modules Ifc; General; Exclusively Analog Transmission Interface Or Analog Secondary Path; Exclusively Digital Interfaces - Siemens SWT-3000 Equipment Manual

SWT 3000 Equipment Manual

The interface modules IFC

General:

The interface module IFC is used for communication between protection equipment and the
SWT 3000. The following versions are available:

Exclusively analog transmission interface or analog secondary path:

Modules IFC-D and IFC-P are inserted at slot IFC./1 (directly next to the PU3) in the subrack. Slot
IFC./2 is provided for inserting module IFC-S. It is also possible to equip this slot with an additional
module IFC-P or IFC-D. In this case the output relays of the module at slot IFC./2 are used for con-
tact doubling, while the inputs are not used.

Exclusively digital interfaces:

Modules IFC-D and IFC-P are inserted at slot IFC./1 (directly next to the PU3) in the subrack. Slot
IFC./2 is provided for inserting module IFC-S, or for an additional IFC-P or IFC-D module. If an IFC-
P or IFC-D is inserted then 8 inputs and outputs are available (in operating mode 5D).

Description of operation:

IFC-D:
IFC-P:
IFC-S:
© SIEMENS AG 2008
Module IFC-D for Interface Command Direct tripping
Module IFC-P Normal version (Interface Command Permissive tripping)
Module IFC-S Signaling (Interface Command Signaling)
The module IFC-D has four binary inputs for receiving contact information
from the protection devices. Up to four circuit breaker coils can also be
operated with this module. It is thus possible to implement the trigger
commands directly from a distant station, i.e. without a protection device.
This module is preferred used for direct tripping mode but the use in pro-
tection systems with permissive tripping is also possible.
The module IFC-P is preferred used in protection systems with permis-
sive tripping. When observing the max. switching current of the relays di-
rect tripping of circuit breaker coils is also possible (ref. to technical data).
There are similarly four binary inputs and four command contact outputs
available. The contact rating of the output relays is lower compared to the
IFC-D module but operating times are significantly shorter. Modules IFC-
D and IFC-P are pin-compatible.
Module IFC-S is used for signaling of commands that are acquired (bi-
nary inputs) or output (relay outputs) by modules IFC-D and IFC-P.
Edition p3_3_2x 08/09
Interface Modules
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