. /.WORLD TRADE
ORGANIZATIONG/TBT/Notif.00/508
20 October 2000
(00-4367)
Committee on Technical Barriers to Trade
NOTIFICATION
The following notification is being circulated in accordance with Article 10.6.
1. Member to Agreement notifying:   THAILAND
If applicable, name of local government involved (Articles 3.2 and 7.2):           
2. Agency responsible:   Thai Industrial Standards Institute, Ministry of Industry
Agency or authority designated to handle comments regarding the notification shall be
indicated if different from above:           
3. Notified under Article 2.9.2 [ X], 2.10.1 [    ], 5.6.2 [    ], 5.7.1 [    ], other:           
4. Products covered (HS or CCCN where applicable, otherwise national tariff heading.
ICS numbers may be provided in addition, where applicable):   HS Chapter 8507,
Applications of information technology (ICS:  35.240)
5. Title, number of pages and language(s) of the notified document:   TIS 1291-2538
(1995) Uninterruptible Power Systems (38 pages, in Thai)
6. Description of content:   The Thai Industrial Standards Institute (TISI) has proposed to
enforce TIS 1291-2538(1995) as a mandatory standard.  The standard applies to single-
phase uninterruptible power systems (UPS) having rated output power not exceeding
75 kVA/single UPS unit and three-phase uninterruptible power systems having rated output
power not exceeding 1,000 kVA/single UPS unit.  Classifies UPS into three types, i.e.single UPS unit, parallel configurations for capacity and redundant UPS.  Specifies service
conditions, rated value and performance.  Prescribes requirements for UPS switch,
supervisory and control devices, and battery.  Includes marking and labelling, sampling and
criteria for conformity, testing.
7. Objective and rationale, including the na ture of urgent problems where applicable:
Safety and Consumer Protection.
8. Relevant documents:
1. Reference document:
- ANSI/NEMA PE 1-1983 Uninterruptible Power Systems (Approved
16 October 1986);
- IEC 146(1973) Semiconductor convertors;
- IEC 14-2(1974) Semiconductors convertors Part 2:  Semiconductor
self-commutated convertors;
- ANSI S 1.2-1979 Method for Physical Measurement of Sound;
- ANSI S 1.4-1983 Sound Level Meters;
- ANSI IEEE C 37.90.1-1988 Surge Withstand Capability (SWC) Tests for
Protective Relays and Relay Systems.G/TBT/Notif.00/508
Page 2
- Comité International Spécial des Perturbations Radioélectriques (CISPR) II
(1990) Limits and methods of measurement of electromagnetic disturbance
characteristics of industrial, scientific and medical (ISM) radiofrequency
equipment;
- TIS 416-2525(1982) The classification of electrical insulating materials;- TIS 1292-2538(1995) Self-commutated inverters for interruptible power
systems;
- TIS 1293-2538(1995) Battery chargers.
2. Publication in which the Notification is published when adopted:
- Government Gazette.
9. Proposed date of adoption:
Proposed date of entry into force: }To be determined.
10. Final date for comments:   60 days from the WTO circulation date
11. Texts available from:  National enquiry point [ X] or address, e-mail and telefax
number of the other body:           