The water-cooled variable frequency speed regulating device (hereinafter referred to as the inverter) adopts a unique soft charging technology to precharge the power unit capacitor in the inverter by controlling the power supply, effectively eliminating the excitation inrush current. It does not affect the upper-level high-voltage switch cabinet or the DC capacitor in the power unit, extending the service life and reliability of the capacitor.
| project | Parameter selection | |
| Enter | Input voltage | 3, 3.3, 6, 6.6, 10KV(*) |
| Allowable voltage fluctuation range | Full load operation, voltage fluctuation ±10% | |
| Frequency variation range | 50Hz±10% | |
| Input current harmonics | ≤3%, in line with IEEE519-1992 and GB/T14549-93 standards | |
| Output | Output voltage range | 3, 3.3, 6, 6.6, 10KV(*) |
| Maximum output capacity | 30000KVA | |
| Overall efficiency power factor | Forced air cooling ≥0.965, water cooling variable frequency≥0.98 | |
| Output frequency range | 0-50Hz(*) | |
Double waterway parallel design
Reasonable waterway direction
Using high-voltage power devices
Online plugging and unplugging of waterway connectors
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