Measuring Equipment Connected To The Power Grid - Ingeteam INGECON SUN PowerMax TL U B 1000 Vdc Series Installation And Operation Manual

Ingeteam
The technical requirements of the auxiliary transformer are:
• The transformer's power should be suitable for the loads connected to it, taking the site environmental
conditions into account. The minimum power value is 4700 VA per inverter.
• The power winding must withstand pulsating voltage components with dU/dt of 500 V/uS. Because of
inverter operation, the voltage between a phase and ground can reach 3/2 of the open circuit voltage of
the PV array.
• Delta connection is advised in the power part and star connection in auxiliary loads.
• We recommend connecting the neutral of the auxiliary loads to ground.

6.9. Measuring equipment connected to the power grid

All measuring devices connected to the power grid (wattmeters, meters, etc.) should be isolated from the grid by
voltage transformers, current transformers, etc.
56
Preparation for installing the unit
ABK2027IQE01_A - Installation and Operation Manual