Mains pro 1.6.1 Global Guide
40
9 Application tips
9.1 Automatic return to mains 40
9.2 Binary switches 40
9.3 Counters 41
9.4 Timer 42
9.5 Start trip 42
9.6 TEST mode 42
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9.1 Automatic return to mains
Some utilities require that the protection unit provides an automatic return of the generating unit back to parallel
operation with mains. This automatic return usually does not happen immediately after the mains parameters
are within limits, but with pre-defined time delay. For such case, the unit allows setting a time delay during
which the Fault reset (page 32) can be automatically performed after the set time runs out.
Appropriate setting of automatic fault reset by setpoint Auto FR Del [s] (page 53) timer allows setting the
waiting time reserved for mains parameters to settle in their fault-free conditions after a TRIP (page 31). This
state is indicated by flashing red signal of the TRIP LED. If during this time any measured value reaches out of
the preset limits, MainsPro terminates the automatic fault reset count-down and goes back into fault indication
state. The automatic fault reset is reset and started again in the moment when all measured values are back in
limits again. After automatic fault reset is count down to zero, the unit performs automatic Fault reset (page 32)
and terminates the TRIP (page 31) status.
9.2 Binary switches
MainsPro allows basic remote operation by means of binary signals wired from an external logic to MainsPro
binary switches. The signals may be also provided remotely, e.g. through radio or GSM communicator devices.
As an example for the many similar devices on the market, see the uGATE communicator below. Ask for more
information about this product at protections@comap-control.com.
This way, MainsPro functionality may be simply controlled by a mobile telephone commands. All four binary
switches may be enabled or disabled by the appropriate setpoints in the group Basic.
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