| c | Commutation | f | Fault |
| T | Transformer | r | Rectifier side |
| i | Inverter side | g | Ground |
| ac | Alternating current | dc | Direct current |
| sm | Smoothing reactor | min | Minimum |
| c | Commutation | f | Fault |
| T | Transformer | r | Rectifier side |
| i | Inverter side | g | Ground |
| ac | Alternating current | dc | Direct current |
| sm | Smoothing reactor | min | Minimum |