Three phase line choke. Connected in the mains supply to the inverter. This will help to reduce harmonics that are caused when the mains is rectified to create a DC link. They will also reduce the peak currents drawn by the inverter or other device. They also help to protect the input rectifier from some mains problems. Harmonics can cause premature failure of input rectifiers and phase correction capacitors.
Buy three phase line chokes here.
Specification and prices below:
| Typical Inverter Power | Model Number | Description | Unit Price |
| 0.4kW, 0.75kW, 1.5kW | CHO-R-4A0-LINE | 7.51mH 3ph 3.9A | £48.74 |
| 2.2kW | CHO-R-6A0-LINE | 4.90mH 3ph 6.0A | £56.12 |
| 3.0kW, 4.0kW | CHO-R-10A-LINE | 2.94mH 3ph 10A | £62.03 |
| 5.5kW | CHO-R-16A-LINE | 1.84mH 3ph 16A | £78.29 |
| 7.5kW, 11kW | CHO-R-25A-LINE | 1.18mH 3ph 25A | £97.48 |
| 15kW, 18.5kW | CHO-R-40A-LINE | 0.46mH 3ph 40A | £101.91 |
| 22kW | CHO-R-50A-LINE | 0.37mH 3ph 50A | £134.40 |
| 30kW | CHO-R-60A-LINE | 0.31mH 3ph 60A | £143.25 |
| 37kW | CHO-R-80A-LINE | 0.23mH 3ph 80A | £150.66 |
| 45kW | CHO-R-100A-LINE | 0.18mH 3ph 100A | £180.21 |
| 55kW | CHO-R-120A-LINE | 0.15mH 3ph 120A | £196.44 |
| 75kW, 90kW | CHO-R-160A-LINE | 0.11mH 3ph 160A | £245.18 |
| 110kW | CHO-R-200A-LINE | 0.09mH 3ph 200A | £273.22 |
| 132kW | CHO-R-250A-LINE | 0.07mH 3ph 250A | £329.36 |
| 160kW | CHO-R-300A-LINE | 0.06mH 3ph 300A | £341.17 |