Rick,
The booklet World Electricity Supplies, 5th Edition published by
BSi in April 1989 says:
* Japan (East):
- 50+/-0.2Hz
- Household voltages 200/100(K), 100(L)
- Commercial voltages 200/100(H)(K)
- Industrial voltages 6.6kV, 200/100(H), 200(G)(J)
- Voltage tolerance +/-10%
* Japan (West):
- 60+/-0.1Hz
- Household voltages 210/105(K), 200/100(K), 100(L)
- Commercial voltages 210/105(H)(K), 200/100(K), 100(L)
- Industrial voltages 22kV, 6.6kV, 210/105(H), 200/100(H)
- Voltage tolerance +/-10%
(G) is three-phase delta; four-wire; earthed mid point of phase
(H) is three-phase open delta; four-wire; earthed mid point of phase
(J) is three-phase open delta; three-wire; earthed junction of phases
(K) is single-phase; three-wire; earthed mid point (same as we use in
the United States)
(L) is single-phase; two-wire; earthed end of phase
This booklet is one of the very few sources that discusses the topology
of various countries' electrical power distribution systems. It costs
65 English pounds, and you can order it from BSi at
http://www.bsi-global.com/Technical+Information/Publications/
_Publications/tig38.xalter
This is one of the 60 sources that Oscar Overton and I used to compile
our web pages:
* INTERNATIONAL POWER, PLUGS, AND LANGUAGES, at
http://www.dbicorporation.com/internat/intpower.htm
(summary covering 240 countries, 60KB, 9 pages printed out)
* INTERNATIONAL PRIMARY POWER, PLUGS, LANGUAGES, APPROVAL MARKS, AND
APPROVAL AGENCIES, at
http://www.dbicorporation.com/internat/internat.htm
(full database covering 300 countries, 360KB, 50+ pages printed out).
I am incorporating INTERNATIONAL POWER, PLUGS, AND LANGUAGES
into the book that I am writing for Kluwer, Robust Electronic Design
Reference , to be published late this year.
If you spot any errors or major omissions in it, please let me know so
that I can fix them.
Thanks!
John Barnes KS4GL, PE, NCE, ESDC Eng, SM IEEE
dBi Corporation
http://www.dbicorporation.com/
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