| 1. North America | Distribution systems commonly use 15–38 kV-class equipment, depending on the network. | Outdoor pole-mounted vacuum reclosers are widely used; single- and three-phase configurations are available in the market. | Check applicable ANSI/IEEE requirements, protection-setting flexibility, and the utility’s SCADA protocol requirements. | Overhead feeder protection, sectionalizing, and utility distribution automation. |
| 2. Europe | Medium-voltage distribution commonly includes 10–20 kV networks, with other classes used by country. | Vacuum interruption is common in current MV designs. IEC 62271-111 covers AC automatic circuit reclosers within its stated scope. | Confirm IEC conformity, utility-specific protection practices, and required communications interfaces. | Compact MV networks and feeder automation where local grid-code compliance is central. |
| 3. China | Common distribution classes include 10 kV and 20 kV; higher MV classes are also used in some networks. | Vacuum-interruption outdoor reclosers are a common modern configuration; exact ratings are model-dependent. | Evaluate local type-test documentation, protection functions, and compatibility with the utility’s automation system. | Urban and rural distribution feeders with a focus on local standards and network integration. |
| 4. India | 11 kV and 33 kV are widely used distribution voltage levels; 22 kV is also used in some areas. | Vacuum reclosers are available for overhead distribution applications, with ratings selected for the local system. | Check utility specifications, environmental ratings, protection coordination, and remote-monitoring requirements. | Long rural feeders and distribution networks where fast fault isolation can improve service continuity. |
| 5. Japan | 6.6 kV is a common distribution voltage; other voltage levels are used in particular network segments. | Compact, outdoor vacuum equipment is a common modern approach for distribution switching and protection. | Assess utility-specific requirements, equipment footprint, protection settings, and communications interfaces. | Space-conscious distribution installations and networks requiring dependable remote operation. |
| 6. South Korea | 22.9 kV is a widely used distribution voltage level. | Vacuum-interruption reclosers are a common choice for MV overhead feeder protection. | Compare control functions, remote-operation capability, and compliance with local utility specifications. | Distribution automation and rapid fault isolation on overhead feeders. |
| 7. Brazil and Latin America | Distribution systems use a range of MV levels, including 13.8 kV and 34.5 kV in some networks. | Outdoor vacuum reclosers are commonly specified for overhead feeders; exact system ratings vary by country and utility. | Confirm local certification, climatic suitability, protection coordination, and available communications options. | Rural and extensive overhead networks where remote control and feeder segmentation are valuable. |
| 8. Australia and New Zealand | Common MV distribution classes include 11 kV and 22 kV; 33 kV is also used in some networks. | Outdoor vacuum reclosers are widely used for overhead distribution and remote feeder locations. | Verify network-specific standards, remote-control requirements, and protection settings used for local operating conditions. | Long rural feeders and remote assets; utilities may require settings suited to local vegetation and fire-risk policies. |
| 9. Middle East | 13.8 kV and 33 kV are among the MV classes used in regional distribution networks. | Outdoor vacuum equipment is available across relevant MV ratings; enclosure and insulation choices depend on site conditions. | Pay particular attention to ambient-temperature ratings, dust protection, corrosion exposure, and utility-approved tests. | Substations and overhead feeders exposed to high temperatures, dust, or coastal environments. |
| 10. Africa and Southeast Asia | 11 kV, 22 kV, and 33 kV are common distribution classes across many networks, with local variation. | Outdoor vacuum reclosers are used for overhead MV protection; product selection depends on fault levels and network design. | Check humidity, lightning exposure, service access, spare-parts support, communications availability, and local standards. | Rural, tropical, and developing distribution networks where ruggedness and maintainability can be key selection factors. |