Description
2.8 Communication and system connection
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
155
Position signaling switch module (PSS COM)
The position signaling switch module (PSS COM) can be installed in the guide frame of a
communication-capable 3WA withdrawable circuit breaker as an option.
It signals the following additional positions of the circuit breaker in the guide frame (see
Chapter Racking the circuit breaker in the guide frame (Page 42)):
• DISC, Disconnect S48
• ABS, Absent S49
The positions are only transmitted to the communications module with module role
selector switch position A, which is connected to the position signaling switch module.
Note
Use of two communications modules
When using two communications modules, the position
signaling switch module on the
communications module must be connected to the communications module with role A.
The information of the "Disconnected" and "Absent" positions is then available on all
communications modules.
By default, the "connected position" and "test position" are determined by the BSS200
Breaker Status Sensor in the circuit breaker and transmitted to the communications
module. Signals about the withdrawable position do not exist for fixed-mounted circuit
breakers.
Remote Switching Protection (RSP)
Remote Switching Protection (RSP) prevents the circuit breaker from opening and
closing via the communications interfaces by means of an open/close command.
It consists of a terminal whose pins must be connected to each other for deactivation.
Remote Switching Protection is active by default and must be deliberately deactivated.
It is connected to the communications module with the role A and is then effective for
communications module A and optionally also for a second communications module B.
Further information on remote switching protection can be found in Chapter Remote
Switching Protection (Page 165)
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