EH0200-CAL-DOC_v3
Inverter protection settings
Disclaimer
Information in this document is for general purposes only. While we make every effort to ensure accuracy, we make no guarantees and reserves the right to change details without notice. For the latest information, please contact us or visit our website.
Primary protection functions
Over/Under voltage Protection
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
Ur < 0.2 pu | 1 s | Grid-connected contactor trips, DC switch trips, converter disconnects from grid, startup prohibited | Flexible configuration possible; settings modification (0.01–7200 s configurable) |
0.2 pu ≤ Ur < 0.9 pu | 5 s | Same as above | same as above |
0.9 pu ≤ Ur < 1.1 pu | Long-term operation | — | — |
1.1 pu ≤ U < 1.25 pu | 20 s | Grid-tie contactor trips, DC switch trips, converter disconnects from grid, startup prohibited | Flexible configuration possible; settings modification (0.01–7200 s configurable) |
1.25 pu ≤ U < 1.3 pu | 2 s | Same as above | same as above |
1.3 pu ≤ Ur | 800 ms | Same as above | same as above |
Over/Under frequency
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
f ≤ 46 Hz | 200 ms | Grid-tie contactor trips, DC switch trips, converter disconnects from grid, startup prohibited | Flexible configuration available in background; settings modification (0.01–7200 s configurable) |
46 Hz < f ≤ 53 Hz | Continuous operation | — | |
f > 53 Hz | 200 ms | Grid-tie contactor trips, DC switch trips, converter disconnects from grid, startup prohibited |
AC Over current
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
IRMS Max > 1.28 pu | 30 s | Grid-tie contactor tripped, DC switch tripped, converter disconnect from grid, and startup is prohibited | 15 min |
IRMS Max > 1.3 pu | 15 s | — |
Grid voltage imbalance
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
Difference in line voltage RMS < 0 | — | Power-on not permitted | 5 s |
Reverse Grid Phase Sequence
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
Reverse grid phase sequence | 1 s | Power-on prohibited | 5 s |
Main Phase Loss
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
Main phase loss fault | 5 s | Power-on prohibited | 10 s |
Anti Islanding
Protection Condition | Protection Time | Protection Action | Recovery Time |
|---|---|---|---|
Powered by grid connected to converter → Power interruption | 2 s | Grid-tie contactor opens, DC switch opens, converter disconnects from grid, and restart is prohibited | 2 s |