Voltage and Frequency by Country: The Global Reference Table for Power Station Projects
Selecting the wrong generator frequency is one of the most expensive mistakes a power project can make. A 60Hz gas turbine landed at a 50Hz site cannot simply be switched on, and the retrofit adds months to a schedule and hundreds of thousands of dollars to a budget. Voltage and Frequency by Country is therefore the first technical filter applied to any equipment shortlist, ahead of capacity, fuel type, or price. USP&E Global has designed, built, and operated power stations across 35+ countries, and every one of those projects began by confirming the grid standard at site. The table below is the working reference our sales engineers use, published so your team can use it too.
Why Voltage and Frequency by Country Determines Your Power Station Design
Frequency governs the rotational speed of the prime mover. A four pole alternator turns at 1,500 RPM for 50Hz and 1,800 RPM for 60Hz, which changes rated output, cooling duty, and the specification of every downstream item. Voltage determines transformer selection, switchgear ratings, cable sizing, and grid interconnection design.
Approximately 80 percent of the world operates at 50Hz. The 60Hz group is concentrated in North America, much of Central and South America, Saudi Arabia, South Korea, the Philippines, and parts of West Africa including Liberia. Frontier markets add a further complication: published national standards frequently differ from what is measured at a remote mine site, where private grids, legacy plant, and voltage drop over long feeders are common. The International Energy Agency identifies unreliable supply as a primary constraint on African industrial productivity, and World Bank energy data shows the same pattern across low access markets.
| Market Group | Voltage and Frequency by Country | Common Generator Setup |
| Western and Southern Africa | 220V to 230V, 50Hz | 1,500 RPM diesel or HFO gensets, 11kV or 33kV step up |
| Liberia and Guyana | 120V to 240V, 60Hz | 1,800 RPM units, scarce secondary market supply |
| Gulf and Middle East | 220V to 240V, 50Hz, Saudi Arabia at 60Hz | Gas turbines and gas reciprocating sets |
| North America | 120V to 240V, 60Hz | 1,800 RPM gas turbines and gas engines for data centres |
| Southern Africa mining | 230V, 50Hz | Hybrid diesel, HFO, and solar configurations |
50Hz and 60Hz: What Frequency Conversion Actually Involves
Conversion is possible, but not uniform across equipment types. Many 1,500 and 1,800 RPM reciprocating gensets convert between 50Hz and 60Hz with governor, alternator, and derating changes, and mobile aeroderivative units such as the GE TM2500 switch relatively quickly. Heavy frame industrial gas turbines often require gearbox or generator changes that make conversion uneconomic against buying correctly rated equipment.
Derating is the point most budgets miss. Converting a 60Hz machine to 50Hz service reduces available output, so a plant sized on nameplate figures arrives undersized. USP&E therefore treats fuel specification, ambient conditions, elevation, and grid standard as a single design input during power plant engineering.
Global Voltage and Frequency by Country Reference Table
Figures below are nominal single phase supply values and should be confirmed against the local utility or a site survey before procurement. Japan is the notable split market, running 50Hz in the east and 60Hz in the west.
| Country or Territory | Nominal Voltage | Frequency |
| Afghanistan | 220V | 50Hz |
| Albania | 230V | 50Hz |
| Algeria | 230V | 50Hz |
| American Samoa | 120V | 60Hz |
| Andorra | 230V | 50Hz |
| Angola | 220V | 50Hz |
| Anguilla | 110V | 60Hz |
| Antigua | 230V | 60Hz |
| Argentina | 220V | 50Hz |
| Armenia | 230V | 50Hz |
| Aruba | 127V | 60Hz |
| Australia | 240V | 50Hz |
| Austria | 230V | 50Hz |
| Azerbaijan | 220V | 50Hz |
| Azores | 230V | 50Hz |
| Bahamas | 120V | 60Hz |
| Bahrain | 230V | 50Hz |
| Balearic Islands | 230V | 50Hz |
| Bangladesh | 220V | 50Hz |
| Barbados | 115V | 50Hz |
| Belarus | 230V | 50Hz |
| Belgium | 230V | 50Hz |
| Belize | 110/220V | 60Hz |
| Benin | 220V | 50Hz |
| Bermuda | 120V | 60Hz |
| Bhutan | 230V | 50Hz |
| Bolivia | 230V | 50Hz |
| Bosnia | 230V | 50Hz |
| Botswana | 230V | 50Hz |
| Brazil | 110/220V | 60Hz |
| Brunei | 240V | 50Hz |
| Bulgaria | 230V | 50Hz |
| Burkina Faso | 220V | 50Hz |
| Burundi | 220V | 50Hz |
| Cambodia | 230V | 50Hz |
| Cameroon | 220V | 50Hz |
| Canada | 120V | 60Hz |
| Canary Islands | 230V | 50Hz |
| Cape Verde | 230V | 50Hz |
| Cayman Islands | 120V | 60Hz |
| Central African Republic | 220V | 50Hz |
| Chad | 220V | 50Hz |
| Channel Islands | 230V | 50Hz |
| Chile | 220V | 50Hz |
| China | 220V | 50Hz |
| Colombia | 110V | 60Hz |
| Comoros | 220V | 50Hz |
| Congo, Democratic Republic (DRC) | 220V | 50Hz |
| Cook Islands | 240V | 50Hz |
| Costa Rica | 120V | 60Hz |
| Cote d’Ivoire | 220V | 50Hz |
| Croatia | 230V | 50Hz |
| Cuba | 110/220V | 60Hz |
| Cyprus | 230V | 50Hz |
| Czech Republic | 230V | 50Hz |
| Denmark | 230V | 50Hz |
| Djibouti | 220V | 50Hz |
| Dominica | 230V | 50Hz |
| Dominican Republic | 110V | 60Hz |
| East Timor | 220V | 50Hz |
| Ecuador | 127V | 60Hz |
| Egypt | 220V | 50Hz |
| El Salvador | 115V | 60Hz |
| Equatorial Guinea | 220V | 50Hz |
| Eritrea | 230V | 50Hz |
| Estonia | 230V | 50Hz |
| Eswatini (Swaziland) | 230V | 50Hz |
| Ethiopia | 220V | 50Hz |
| Faeroe Islands | 230V | 50Hz |
| Falkland Islands | 240V | 50Hz |
| Fiji | 240V | 50Hz |
| Finland | 230V | 50Hz |
| France | 230V | 50Hz |
| French Guiana | 220V | 50Hz |
| Gabon | 220V | 50Hz |
| Gambia | 230V | 50Hz |
| Gaza | 230V | 50Hz |
| Germany | 230V | 50Hz |
| Ghana | 230V | 50Hz |
| Gibraltar | 230V | 50Hz |
| Greece | 230V | 50Hz |
| Greenland | 230V | 50Hz |
| Grenada | 230V | 50Hz |
| Guadeloupe | 230V | 50Hz |
| Guam | 110V | 60Hz |
| Guatemala | 120V | 60Hz |
| Guinea | 220V | 50Hz |
| Guinea-Bissau | 220V | 50Hz |
| Guyana | 240V | 60Hz |
| Haiti | 110V | 60Hz |
| Honduras | 110V | 60Hz |
| Hong Kong | 220V | 50Hz |
| Hungary | 230V | 50Hz |
| Iceland | 230V | 50Hz |
| India | 240V | 50Hz |
| Indonesia | 230V | 50Hz |
| Iran | 230V | 50Hz |
| Iraq | 230V | 50Hz |
| Ireland | 230V | 50Hz |
| Isle of Man | 230V | 50Hz |
| Israel | 230V | 50Hz |
| Italy | 230V | 50Hz |
| Jamaica | 110V | 50Hz |
| Japan | 100V | 50/60Hz |
| Jordan | 230V | 50Hz |
| Kazakhstan | 220V | 50Hz |
| Kenya | 240V | 50Hz |
| Kiribati | 240V | 50Hz |
| Korea, South | 220V | 60Hz |
| Kuwait | 240V | 50Hz |
| Kyrgyzstan | 220V | 50Hz |
| Laos | 230V | 50Hz |
| Latvia | 230V | 50Hz |
| Lebanon | 230V | 50Hz |
| Lesotho | 220V | 50Hz |
| Liberia | 120V | 60Hz |
| Libya | 127/230V | 50Hz |
| Liechtenstein | 230V | 50Hz |
| Lithuania | 230V | 50Hz |
| Luxembourg | 230V | 50Hz |
| Macau | 220V | 50Hz |
| Macedonia | 230V | 50Hz |
| Madagascar | 127/220V | 50Hz |
| Madeira | 230V | 50Hz |
| Malawi | 230V | 50Hz |
| Malaysia | 240V | 50Hz |
| Maldives | 230V | 50Hz |
| Mali | 220V | 50Hz |
| Malta | 230V | 50Hz |
| Martinique | 220V | 50Hz |
| Mauritania | 220V | 50Hz |
| Mauritius | 230V | 50Hz |
| Mexico | 127V | 60Hz |
| Micronesia | 120V | 60Hz |
| Moldova | 230V | 50Hz |
| Monaco | 230V | 50Hz |
| Mongolia | 230V | 50Hz |
| Montserrat Islands | 230V | 60Hz |
| Morocco | 220V | 50Hz |
| Mozambique | 220V | 50Hz |
| Myanmar (Burma) | 230V | 50Hz |
| Namibia | 220V | 50Hz |
| Nauru | 240V | 50Hz |
| Nepal | 230V | 50Hz |
| Netherlands | 230V | 50Hz |
| Netherlands Antilles | 127/220V | 50Hz |
| New Caledonia | 220V | 50Hz |
| New Zealand | 230V | 50Hz |
| Nicaragua | 120V | 60Hz |
| Niger | 220V | 50Hz |
| Nigeria | 240V | 50Hz |
| Norway | 230V | 50Hz |
| Okinawa | 100V | 60Hz |
| Oman | 240V | 50Hz |
| Pakistan | 230V | 50Hz |
| Palmyra Atoll | 120V | 60Hz |
| Panama | 110V | 60Hz |
| Papua New Guinea | 240V | 50Hz |
| Paraguay | 220V | 50Hz |
| Peru | 220V | 60Hz |
| Philippines | 220V | 60Hz |
| Poland | 230V | 50Hz |
| Portugal | 230V | 50Hz |
| Puerto Rico | 120V | 60Hz |
| Qatar | 240V | 50Hz |
| Reunion Island | 230V | 50Hz |
| Romania | 230V | 50Hz |
| Russian Federation | 230V | 50Hz |
| Rwanda | 230V | 50Hz |
| Saudi Arabia | 127/220V | 60Hz |
| Senegal | 230V | 50Hz |
| Serbia and Montenegro | 230V | 50Hz |
| Seychelles | 240V | 50Hz |
| Sierra Leone | 230V | 50Hz |
| Singapore | 230V | 50Hz |
| Slovakia | 230V | 50Hz |
| Slovenia | 230V | 50Hz |
| Somalia | 220V | 50Hz |
| South Africa | 230V | 50Hz |
| Spain | 230V | 50Hz |
| Sri Lanka | 230V | 50Hz |
| St. Kitts and Nevis | 230V | 60Hz |
| St. Lucia | 240V | 50Hz |
| St. Vincent | 230V | 50Hz |
| Sudan | 230V | 50Hz |
| Suriname | 127V | 60Hz |
| Sweden | 230V | 50Hz |
| Switzerland | 230V | 50Hz |
| Syria | 220V | 50Hz |
| Tahiti | 110/220V | 60Hz |
| Taiwan | 110V | 60Hz |
| Tajikistan | 220V | 50Hz |
| Tanzania | 230V | 50Hz |
| Thailand | 220V | 50Hz |
| Togo | 220V | 50Hz |
| Tonga | 240V | 50Hz |
| Trinidad and Tobago | 115V | 60Hz |
| Tunisia | 230V | 50Hz |
| Turkey | 230V | 50Hz |
| Turkmenistan | 220V | 50Hz |
| Uganda | 240V | 50Hz |
| Ukraine | 230V | 50Hz |
| United Arab Emirates | 220V | 50Hz |
| United Kingdom | 230V | 50Hz |
| United States | 120/240V | 60Hz |
| Uruguay | 220V | 50Hz |
| Uzbekistan | 220V | 50Hz |
| Venezuela | 120V | 60Hz |
| Vietnam | 220V | 50Hz |
| Virgin Islands | 110V | 60Hz |
| Western Samoa | 230V | 50Hz |
| Yemen | 230V | 50Hz |
| Zambia | 230V | 50Hz |
| Zimbabwe | 220V | 50Hz |
USP&E Global does not supply equipment, spare parts, or services into sanctioned jurisdictions, including Iran and Russia. Entries above are published for technical reference only, and all enquiries are screened against OFAC and FCPA requirements before a proposal is issued.
Frequently Asked Questions
What is the difference between 50Hz and 60Hz power?
Frequency describes how many times per second the alternating current changes direction. A 50Hz alternator runs at 1,500 or 3,000 RPM and a 60Hz alternator at 1,800 or 3,600 RPM. Motors, pumps, and transformers built for one frequency run hot or inefficiently on the other, so confirm the site standard before ordering.
Can a 60Hz generator be converted to 50Hz?
Many reciprocating diesel and gas gensets convert between 50Hz and 60Hz through governor, control, and alternator changes, and mobile aeroderivative turbines switch relatively quickly. Heavy frame industrial turbines are far more complex and often uneconomic to convert. Expect a derate and request a written performance guarantee.
Which African countries use 60Hz?
Liberia is the main 60Hz market in West Africa at 120V. The large majority of the continent, including Mali, Burkina Faso, Togo, Ghana, Nigeria, Mozambique, Tanzania, and South Africa, operates at 50Hz with nominal voltages between 220V and 240V.
Does voltage and frequency by country affect project cost?
Yes. Grid standard determines whether equipment can be sourced from the global used and surplus market or must be newly manufactured. In 60Hz markets with limited secondary supply, lead times and capital cost both rise. Confirming the standard early protects both the schedule and the budget.
How does USP&E confirm the correct grid standard at site?
Confirmation comes from a site survey, utility interconnection data, and third party fuel and load analysis carried out during feasibility and conceptual engineering. USP&E then matches available diesel, natural gas, and HFO equipment to the confirmed specification.
Summary: Key Takeaways for Power Project Decision Makers
- Voltage and Frequency by Country is the first filter in equipment selection, ahead of capacity and price.
- Roughly 80 percent of the world runs at 50Hz. The 60Hz group includes North America, much of Latin America, Saudi Arabia, South Korea, and Liberia.
- Conversion between 50Hz and 60Hz is feasible on many reciprocating and mobile aeroderivative units, and rarely economic on heavy frame turbines.
- Every conversion carries a derate. Size the plant on converted output, not nameplate output.
- Published national figures should always be verified by site survey before procurement.
- USP&E Global has delivered 150+ projects across 35+ countries with 350+ engineers, ISO 9001:2015 and ISO 45001:2018 certification, and zero lawsuits in 25 years. See our project experience and operations and maintenance
Ready to Power Your Project? Talk to USP&E’s Engineers Free.
USP&E Global offers a complimentary 4-hour engineering consultation for qualified power station, EPC, and O&M projects. Whether you are in early feasibility or ready to mobilize, our team of 350+ engineers across 35+ countries is ready to guide your project to success with speed and without excuses.
USP&E Global. Powering Possibility. Built for the Frontier.
ISO 9001:2015 | ISO 45001:2018 | 150+ Projects | 35+ Countries | Zero Lawsuits