5.3.7 Short circuit, and short circuit close attempts
You can connect the breaker's short circuit detection to the controller.
Hardware
Configure this input under Configure > Input/output. Select the hardware module, then select the input to configure.
Table 5.20
Breaker configuration
Function I/O Type Details
Breakers > [Breaker] >
Feedback > [*B] short
circuit
Digital input Continuous
Required for short circuit detection, when the breaker is tripped
independently due to a short circuit. One input is required for each breaker.
The breaker activates this input when it detects a short circuit. The controller
then activates the [Breaker] short circuit alarm
.
Short circuit close attempt parameters
In exceptional circumstances, where a short circuit input is configured, this function allows a breaker to attempt to close during a
blackout even though another breaker in the system was tripped by a short circuit. This may only be done in systems that are
designed for this type of operation. If you choose to attempt to close the breaker even though a short circuit input was activated,
this is your own responsibility.
DANGER!
Closing a breaker after a short circuit is extremely risky.
Configure the parameter under Configure > Parameters > Power management rules > Configuration # > Blackout > Short
circuit close attempts, where # is 1 to 8.
INFO
The Short circuit close attempts function is only active when there is a blackout.
Parameter Range Default Notes
Set point 0 to 1 0
0 close attempts: The power management system will not close a breaker to connect to a system
where a short circuit was detected. The breaker must first be reset and the [Breaker] short circuit
alarm deactivated and acknowledged.
1 close attempt: In exceptional circumstances, you may change this parameter to allow a breaker
to attempt to close once, even though a short circuit was detected by another breaker.
5.3.8 Breaker state outputs
You can configure outputs for the breaker state.
Inputs and outputs
Assign the breaker state outputs under Configure > Input/output. Select the hardware module, then select the output to configure.
The outputs are not part of the breaker configuration and are optional.
DESIGNER'S HANDBOOK 4189340911K UK Page 151 of 521
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