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Voltage & Frequency Database
What Is a Generator Voltage Frequency by Country Database?
A reference table that maps every country to its nominal mains electricity standard — the single-phase voltage, three-phase voltage, frequency (Hz), and plug type. It is the specification input for any generator sold or installed outside its manufacturing country.
Voltage
Alternator Configuration
A 230 V single-phase system and a 400 V three-phase system require different alternator windings and different generator models.
Frequency
Engine Speed
A 50 Hz set runs at 1,500 rpm on a four-pole alternator; a 60 Hz set runs at 1,800 rpm. The frequency determines the engine's governed speed.
Plug Type
Connection Hardware
Two countries can share 230 V, 50 Hz and use different sockets. The plug type varies independently of voltage and frequency.
Why This Database Exists
The generic "mains voltage by country" tables online answer the consumer question. This database answers the generator question: it pairs every country standard with the build that produces it, so the lookup flows straight into a specification. Three values matter most to a generator buyer — voltage, frequency, and plug type — and this database delivers all three in one searchable reference.
Built for Exporters & Engineers
Search, Filter, Export
01
200+ Countries Covered
Every nation with a published grid standard. Single-phase and three-phase voltages, frequency, and plug type included.
02
Search by Country, Frequency or Voltage
Filter to see all 50 Hz countries, all 60 Hz countries, or every market that accepts a 400 V three-phase build.
03
Reverse Lookup
Enter a voltage and frequency — such as 400 V at 50 Hz — and the tool returns every country that matches, confirming one generator model serves an entire export region.
04
Downloadable Chart
Export the full dataset as Excel, CSV, or PDF for your export documentation, engineering handoffs, and project records.
Searchable Database
Generator Voltage Frequency by Country Database: Searchable Lookup
Filter by country name, by frequency (50 Hz or 60 Hz), or by voltage band. The tool returns matching grid standards for export specification. The full dataset covers 200+ countries.
| Country | 1-Phase V | 3-Phase V | Frequency | Plug |
|---|---|---|---|---|
| United States | 120 | 208 / 480 | 60 Hz | A / B |
| Canada | 120 | 208 / 480 | 60 Hz | A / B |
| Mexico | 127 | 220 | 60 Hz | A / B |
| United Kingdom | 230 | 400 | 50 Hz | G |
| France | 230 | 400 | 50 Hz | C / E |
| Germany | 230 | 400 | 50 Hz | C / F |
| China | 220 | 380 | 50 Hz | A / C / I |
| Japan | 100 | 200 | 50 / 60 Hz | A / B |
| Saudi Arabia | 230 | 400 | 60 Hz | G |
| United Arab Emirates | 230 | 400 | 50 Hz | G |
| Australia | 230 | 400 | 50 Hz | I |
| India | 230 | 400 | 50 Hz | C / D / M |
| Brazil | 127 / 220 | 380 | 60 Hz | C / N |
| Nigeria | 230 | 400 | 50 Hz | D / G |
| Philippines | 220 | 380 | 60 Hz | A / B / C |
| Russia | 220 | 380 | 50 Hz | C / F |
| Cuba | 110 / 220 | 190 / 220 | 60 Hz | A / B / C / L |
| South Korea | 220 | 380 | 60 Hz | C / F |
| Italy | 230 | 400 | 50 Hz | C / F / L |
| Spain | 230 | 400 | 50 Hz | C / F |
| South Africa | 230 | 400 | 50 Hz | C / D / M / N |
| Egypt | 220 | 380 | 50 Hz | C / F |
| Pakistan | 230 | 400 | 50 Hz | C / D / G |
| Malaysia | 230 | 400 | 50 Hz | G |
Footnote: Nominal values vary locally. Dual-voltage regions exist inside many countries, and tolerance bands (plus or minus 6% to 10%) are normal. For a complete list of 200+ countries, download the chart or use the searchable database. For full model ratings that match each standard, see the diesel generator specifications database.
Global Divide
The Global Divide: 50 Hz vs 60 Hz Countries
Frequency splits the world into two camps, and the boundary follows history more than geography. The decision of whether your generator must run at 1,500 rpm (50 Hz) or 1,800 rpm (60 Hz) determines the engine speed, the governor, and the alternator configuration.
01
50 Hz Countries
50 Hz countries include most of Europe, Asia, Africa, Australia, and New Zealand, plus Russia and the CIS. The 230 V, 50 Hz standard dominates this camp, with 220 V and 240 V as older or regional variants. If you export to Africa, the Middle East, Southeast Asia, or the European market, the default build is 50 Hz.
A complete 230V 50Hz countries list runs from the United Kingdom and Germany through China, India, Nigeria, and Australia, with the 220 V variant across Russia and the CIS.
02
60 Hz Countries
60 Hz countries include North America, Central America, parts of South America, the Caribbean, Japan west of the 60 Hz line, South Korea, the Philippines, and Saudi Arabia. The dominant standards are 120 V, 60 Hz and 127 V, 60 Hz single-phase, with 208 V, 480 V, and 220 V three-phase outputs.
A 110V 60Hz countries list begins with the United States, Canada, and Mexico and extends through most of Central America and the Caribbean, with the 127 V variant common across Latin America.
03
Frequency & Engine Speed
The frequency is not arbitrary. It is set by engine speed on a four-pole alternator:
1,500 rpm × 4 ÷ 120 = 50 Hz
1,800 rpm × 4 ÷ 120 = 60 Hz
So "50 Hz vs 60 Hz countries" is really a question of whether your generator must run at 1,500 or 1,800 rpm, and whether your alternator and governor are built for it.
04
Dual‑Standard Countries
Dual‑standard countries complicate the map. Japan runs 100 V on both frequencies: 50 Hz in the east (Tokyo region) and 60 Hz in the west (Osaka region). Brazil uses 127 V or 220 V at 60 Hz depending on the state. Cuba lists 110 V and 220 V, both at 60 Hz.
For these markets, confirm the city‑level standard, not the country‑level one, before you build.
Voltage Standards
Voltage Standards Explained: 110 V, 220 V, 230 V & the Exceptions
Voltage has its own families, and they do not line up neatly with frequency. Understanding the 110–127 V and 220–240 V families — and their exceptions — is essential for specifying the correct generator alternator.
01
110 to 127 V Family
The 110 to 127 V family covers North America, parts of Latin America, and the Caribbean: 110 V, 115 V, 117 V, and 127 V nominal. Jamaica and Barbados use 115 V at 50 Hz — a deliberate exception in a 60 Hz region. Mexico uses 127 V at 60 Hz.
The 110–127 V family is historically tied to early North American electrification and persists across the region.
02
220 to 240 V Family
The 220 to 240 V family covers most of the rest of the world. China, Russia, and much of the CIS list 220 V at 50 Hz. Most of Europe, Asia, Africa, and Oceania list 230 V at 50 Hz, and the United Kingdom and Australia use 230 V as the nominal standard.
The drift from 220 V to 230 V came from a European harmonisation that lifted several countries by 10 V — within the tolerance of most generator alternators.
03
60 Hz Voltage Exceptions
Three 60 Hz voltage exceptions sit inside the 50 Hz world: Montserrat, Saint Kitts and Nevis, and Antigua and Barbuda run 230 V at 60 Hz. A generator built for 230 V, 50 Hz will not directly power them, and a 120 V, 60 Hz build will not either.
These exceptions are rare but critical to identify before quoting an export order.
04
Medium‑Voltage Standards
For large installations, three‑phase output scales past the low‑voltage range. Medium‑voltage standards include 3.3 kV (Japan and Korea), 6.6 kV and 11 kV (much of Asia and the Middle East), and 4.16 kV and 13.8 kV (North America).
Huali builds the high‑voltage generator range across 8–4,000 kVA for these grids, with the transformer and switchgear specified to the site.
How to Configure
How to Configure a Generator for Your Destination Country
The country table tells you the destination standard. Configuring the generator to produce it is a four‑step process — exactly what the engineering team does on every export order.
1
Set Frequency First
50 Hz = 1,500 rpm • 60 Hz = 1,800 rpm. This selects the engine's rated speed, governor, and flywheel — before voltage.
2
Reconnect Alternator
12‑lead alternator reconfigures to 400 V / 230 V, 415 V / 240 V, or 480 V / 277 V for the destination standard.
3
Match V/Hz & Set AVR
400 V ÷ 50 Hz = 8.0 • 480 V ÷ 60 Hz = 8.0. The AVR holds this ratio under load at the destination.
4
Test at Destination
100% load test at the exact voltage and frequency of the destination before shipping. Test record ships with the set.
+
Dual‑Frequency
Switchable set runs 1,500 or 1,800 rpm via electronic governor. One unit serves both 50 Hz and 60 Hz markets.
Configure your build with our engineers. Tell us the destination country and the load, and we will match the frequency, reconnect the alternator, and set the AVR before we ship. Ask our engineers.
The Cost of Getting It Wrong
What Happens If You Use the Wrong Frequency
A mismatched frequency is not a minor nuisance. It damages equipment in three predictable ways, and the fix is not an adapter — it's either a frequency converter or a correctly built generator.
01
Motors Run Slower & Overheat
A 60 Hz motor fed with 50 Hz power runs roughly 17% below rated speed. Cooling fans slow, heat builds. A 50 Hz motor on 60 Hz runs 20% fast, accelerating wear.
02
Transformers Overheat
A transformer sized for one frequency experiences higher core flux density on the other, raising losses and core temperature. A silent failure mode that shortens life.
03
Centrifugal Loads Overload
Fans, pumps, and blowers are cube‑of‑speed loads. A small speed change produces a large power change — a load can draw far more than the generator is rated for.
The fix is not an adapter. Rotary frequency converters handle roughly 30 to 3,000 kVA; static converters cover roughly 20 to 400 kVA with higher efficiency. Both add cost, complexity, and a point of failure. For a permanent installation, the correct answer is a generator built to the destination frequency — which is why the country lookup comes first.
Let's talk
Download the Complete Voltage & Frequency Chart
Get the full generator voltage and frequency by country database in Excel, CSV, or PDF — 200+ countries with single and three-phase voltages, 50 Hz / 60 Hz, and plug types. Also receive a free factory-direct quote for a generator configured to your destination grid.
Frequently Ask Questions
Q: What voltage and frequency does the United States use?
A: The United States uses 120 V single-phase and 208 V or 480 V three-phase, at 60 Hz. This is the anchor of the 60 Hz world, and North American generators are built to it.
Q: What voltage and frequency does the United Kingdom use?
A: The United Kingdom uses 230 V single-phase and 400 V three-phase, at 50 Hz, with a type G socket. Note the 415 V / 240 V variant for some industrial three-phase installations.
Q: Can I run a 50 Hz generator on a 60 Hz grid?
A: No, not directly. The frequencies are incompatible, and the equipment on the load side is built for one or the other. A frequency converter or a correctly built generator is required. Confirm the country standard in the database before ordering.
Q: Can a 60 Hz motor run on 50 Hz?
A: Not without derating. The motor slows by roughly 17%, cooling suffers, and full-load torque demand can overload it. For constant-speed or centrifugal loads, treat a frequency change as a redesign, not a setting.
Q: What frequency do diesel generators produce?
A: A diesel generator produces the frequency set by its engine speed and alternator pole count. On a four-pole alternator, 1,500 rpm produces 50 Hz and 1,800 rpm produces 60 Hz. The generator frequency by country determines which speed you order.
Q: Why do some countries use 110 V and others use 230 V?
A: The split traces to early electrical history. North America standardized around 110 V for incandescent lighting and kept it as the nominal 120 V standard. Europe and much of the rest of the world standardized higher voltages, which transmit more power for the same copper, and settled on 220 V to 240 V. The two families persist today in the standards table.
Q: How do I configure a generator for export?
A: Match the destination in four steps: set the frequency via governor speed (1,500 rpm for 50 Hz, 1,800 rpm for 60 Hz), reconnect the alternator for the destination voltage, hold the correct V/Hz ratio with the AVR, and factory-test at the destination standard. Huali does all four on every export order.
Q: What is a dual-frequency generator?
A: A dual-frequency generator runs at either 1,500 or 1,800 rpm through an electronic governor and programmable ECU, holding the V/Hz ratio at both speeds. It serves mixed 50 Hz and 60 Hz markets from one unit, which suits distributors and contractors with work across regions.