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6-6
Control Functions
Blocking Matrix
Controllable Objects
857-UM001A-EN-P – July 2009
By means of a blocking matrix, the operation of any protection stage
can be blocked. The blocking signal can originate from the digital
inputs DI1 to DIn (see chapter order code), or it can be a start or trip
signal from a protection stage or an output signal from the user's
programmable logic. In the block matrix Figure 6.2 an active
blocking is indicated with a black dot (•) in the crossing point of a
blocking signal and the signal to be blocked.
Figure 6.2 – Blocking Matrix and Output Matrix
The relay allows controlling of six objects, that is, circuit-breakers,
disconnectors and earthing switches. Controlling can be done by
"select-execute" or "direct control" principle.
The logic functions can be used to configure interlocking for a safe
controlling before the output pulse is issued. The objects 1...6 are
controllable while the objects 7...8 are only able to show the status.
Controlling is possible by the following ways:
through the local HMI
through a remote communication
through a digital input
The connection of an object to specific output relays is done via an
output matrix (object 1-6 open output, object 1-6 close output).
There is also an output signal "Object failed", which is activated if
the control of an object fails.
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