Connecting To Grid, Test Of String Voltage - Hyundai HPC-250HT User Manual

USER MANUAL of HPC-250HT

3.3.1.6 Connecting to Grid, Test of String Voltage

The output power delivery capability of the network of solar arrays is tested in this step of the
HPC-250HT start sequence. The network of solar arrays is loaded and input voltage drop is
measured. The measured voltage level (factory-determined voltage level, always below the
value set in the "Start Voltage" textbox on the "Setting 1" tab page) on the input of the HPC-
250HT determines the next step of the start sequence.
The system can get into this state
- From the "Grid Voltage and Frequency Test" state if the utility network parameters
are within the ranges defined on the "Setting 2" tab page.
The system can leave this state
- If the measured input voltage level of the HPC-250HT during the String Voltage Test
is above a factory-set safety value, the AC Contactor (-K1) turns ON, the system
connects to the utility network and system state switches to "Feeding to the Grid"
- If the measured input voltage level of the HPC-250HT during the String Voltage Test
is below a factory-set safety value, the system state switches to "Waiting after Low
power Stop"
- By holding the Start / Stop Key Operated Spring-Return Switch (-S1) in "Stop"
condition for more than three seconds the system switches to "Shut Down" state
PE07019-022-B Page 17 of 69