Mains pro 1.6.1 Global Guide
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400 V - this range applies in case of "delta" connection of the 3-phase system using nominal 400V phase to
phase. Overshoot by 30% up to 520V is possible for this measurement range. For this case, set the setpoint
to 230/400V. MainsPro will adjust automatically the measurement method, to assure the
defined accuracy for the measured voltage 400 V.
120 V - this range is applicable in countries using 120 V nominal voltage phase to neutral. Another
application is for the high-voltage and other applications, using voltage transformers from rated voltage to
100 V. The guaranteed accuracy applies to both ranges 100 and 120 V. Overshoot by 30% up to 156V is
possible for this measurement range. For this case, set the setpoint
to 120V.
3.6 Wiring examples
This chapter provides examples of possible wiring of MainsPro which can be used as a preparation concept of
wiring scheme.
Note:
ComAp bears no responsibility of functionality of the solution where these concepts are applied.
1. Under normal conditions the undervoltage coil is powered. In case of fault, the voltage is lost and the breaker
undervoltage coil opens.
2. Under normal conditions the Off coil is not powered and contacts are open. In case of failure, the contacts
(12) close and the voltage is applied on the Off coil, therefore auxiliary power supply (e.g.UPS) is necessary
to provide voltage for the Off coil.
