| Electrical substations | Apparent Power | Short-circuit voltage | Coupling | Primary voltage (RMS) | secondary voltage (RMS) | secondary current (RMS) |
| Domestic (Kalley-East) | 630 kVA | 4% | Dyn11 | 20 kV | 410 V | 909 A |
| Hospital (HNL) | 1000 kVA | 5% | Dyn11 | 20 kV | 400 V | 1443 A |
| Industrial (ORIBA) | 1260 kVA | 5.5% | Dyn11 | 20 kV | 410 V | 1306.3 A |