[James_H._Harlow]_Electric_Power_Transformer_Engin(BookSee.org)

The developer of a standard is presented with a range of options in pursuing the document’s acceptance
as an American national standard. All methods require prior, or standing, approval until organization
scope is changed from ANSI. The canvass method provides the greatest flexibility for the developer but
places a greater involvement in assembling the necessary balloting group and, therefore, latitude in
determining voting participants. For a developer outside an organization, the canvass list and the ASC
methods provide the greatest and quickest access. The ASO route is not a normal venue for outsiders,
or nonmembers, without special arrangements or agreements from the sponsoring ASO, particularly, if
the document falls outside the scope of the organization’s accreditation.
FIGURE 3.14.2 ANSI accredited-standards-committee approval process for C57.
3.14.2 The International Electrotechnical Commission (IEC)
The International Electrotechnical Commission (IEC) is composed of a central office and approximately
100 technical committees and subcommittees. The IEC central office is located in Geneva, Switzerland.
All balloting of technical documents is conducted through the central office.
The national committees of each country are responsible for establishing participation status on the
various technical committees and subcommittees as well as casting votes on the respective ballots.
Participation status by a national committee of a country can be in one of three categories:
• P-member: participates actively in the work, with an obligation to vote on all questions formally
submitted for voting within the technical committee or subcommittee, to vote on enquiry drafts
and final draft international standards, and whenever possible, to participate in meetings.
• O-member: follows the work as an observer and, therefore, receives committee documents and
has the right to submit comments and to attend meetings.
• Nonmember: has neither the rights nor obligations described above for the work of a particular
committee. Nevertheless, all national bodies — irrespective of their status within a technical
committee or subcommittee — have the right to vote on enquiry drafts and on final-draft international
standards. All ballots are cast by the national committees of the respective countries, with
one vote per country.
The U.S. national committee is a committee of the American National Standards Institute (ANSI),
with headquarters in New York City. U.S. technical interface with IEC TCS/SCS is via a technical advisory
group (TAG) and a technical advisor (TA). TAGs are administered by an organizational TAG administrator.
TAs are appointed by the U.S. National Committee Executive Committee (EXCO) to represent
U.S. interests on the various technical committees and subcommittees. TA appointments are based on
technical experience and capability. TAs are responsible for establishing TAGs to develop consensus
positions of technical issues and to assist the TA in technical representation. This includes the nomination
of working-group experts.
As stated above, all balloting of technical documents is conducted through the central office of the
IEC. The ballots are first distributed to the national committees. The national committees next send the
ballots to the appropriate technical experts for input. Within the U.S., ballots are submitted to the TA/
TAG. The TA/TAG administrator has the responsibility to distribute the ballot to the TAG for direction
and/or comment. A consensus process is used to be certain that votes are truly representative of the U.S.
position.
The TA/TAG administrator sends all recommended actions to the secretary of the USNC. The secretary
then sends the official U.S. vote to the IEC central office. Figure 3.14.4 shows a flow diagram of the IEC
ballot process.
3.14.3 Relevant Power Transformer Standards Documents
There are numerous issued documents that apply to the specifications and performance requirements
for the various power transformers in the industry today. This section organizes them in ascending order
of power ratings, in the following categories:
© 2004 by CRC Press LLC
© 2004 by CRC Press LLC