General Information
Overview
The interface module IFC is used for communication between protection equipment and SWT 3000.
The following versions are available:
•
Interface Command Direct tripping (IFC-D) module (heavy-duty version)
•
Interface Command Permissive tripping (IFC-P) module (normal version)
•
Interface Command Signaling (IFC-S) module (signaling)
Exclusively Analog Transmission Interface or Analog Secondary Path
You can insert only IFC-D or IFC-P modules into slot IFC-1 and IFC-3 in the subrack. Slot IFC-2 and IFC-4 can
also be equipped with the IFC-D/P modules or alternatively with the IFC-S module.
If using 2 IFC-D/P modules, only the output relays of the module at the IFC-2 or IFC-4 slot are used for contact
doubling. The inputs are not used because the maximum number of commands is 4. In this case, activate the
function Contact doubling in the Special allocation list box.
Exclusively Digital Transmission Interfaces
You can insert only IFC-D or IFC-P modules into slot IFC-1 and IFC-3 in the subrack. Slot IFC-2 and IFC-4 can
also be equipped with the IFC-D/P modules or alternatively with the IFC-S module.
If using 4 IFC-D/P modules, there are 16 inputs and outputs available (in operating mode 5D).
Description of Operation
Overview
IFC-D
The IFC-D module has 4 binary inputs for receiving contact information from the protection
devices. Up to 4 circuit breaker coils can also be operated with this module. It is thus possible
to implement the trigger commands directly from a distant station, for example, without a
protection device. This module is preferably used for direct tripping mode but the use in
protection systems with permissive tripping is also possible.
IFC-P
The IFC-P module is preferably used in protection systems with permissive tripping. When
observing the maximum switching current of the relays, direct tripping of circuit breaker
coils is also possible (refer to Technical Data). There are similarly 4 binary inputs and 4
command contact outputs available. The contact rating of the output relays is lower
compared to the IFC-D module but operating times are shorter. IFC-D and IFC-P modules are
pin-compatible.
IFC-S
The IFC-S is used for signaling. Each command input as well as each command output in the
corresponding IFC-D/P is activating a relay on the IFC-S. If there are digital transmission
paths, it can be necessary to use 2 IFC-S cards.
The IFC-S module is used for:
•
Signaling commands that are entered (binary inputs)
•
Signaling commands that are output (binary output)
8.1
8.1.1
8.1.2
8.1.3
8.1.4
8.1.4.1
Interface Command Module
8.1 General Information
318
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
C53000-G6040-C605-1, Edition 03.2020
