MainsPro G99TT 1.0.0 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.
Configuration of automatic fault reset timer by setpoint Auto FR Del [s] (page 55) defines a 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 gets out of the preset
limits, MainsPro G99TT terminates the automatic fault reset count-down and goes back into fault indication
state. The automatic fault reset timer is reset and started again in the moment when all measured values are
back within limits again. When the automatic fault reset timer elapses, the unit performs automatic Fault
reset (page 32) and terminates the TRIP (page 31) status.
9.2 Binary switches
MainsPro G99TT allows basic remote control by means of binary signals wired from an external device to
MainsPro G99TT binary switches. The signals may be also provided remotely, e.g. through radio or GSM
communicator devices. As an example of such a device, see the uGATE communicator below. Ask for more
information about this product at support@comap-control.com.
This feature enables the user to easily control the MainsPro G99TT unit functionality remotely. All four binary
switches may be enabled or disabled by the appropriate setpoints in the group Basic.
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