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TIS 1291-2545 (2002) Uninterruptible power systems(英文).pdf
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TIS
1291-2545
2002
Uninterruptible
power
systems英文
1291
2545
2002
systems
英文
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Unofficial Translation
In the event of any doubt or misunderstanding arising from this translation, the standard in Thai will be held to be authoritative
Notification of the Ministry of Industry
(No.3049)B.E.2545(2002)
issued under the Industrial Product Standards Act B.E. 2511(196
Subject: Amending to Thai Industrial Standard for
Uninterruptible Power Systems(Amendment No. 1
Standara rorc, Whereas it is deemed expedient appropriate to revise the Thai Industrial
By virtue of Section 15 of the Industrial Product Standards Act BE2511
(1968), the Minister of Industry hereby issues a notification amending the Thai Industrial
Standard for Uninterruptible Power Systems(TIS 1291-2538)which is attached to the
Notification of Ministry of Industry No 2062, dated 8 September, BE2538(199 )as follows
1. The number of the standard is amended fromts1291-2538 to S
1291-2545.
2. The statement in clause 1.2 is withdrawn and replaced with the following
statement.
1.2 This standard covers single phase uninterruptible power systems of
output power not exceeding 20 KVA per single UPS unit and three
phase uninterruptible power systems of output power not exceeding
75 KVA per single UPS unit
Such ministerial notification shall come into force upon their publication in the Government
Gazette
Given on 30 April B E2545(2002)
Minister of Industry
Published in the Government Gazette Vol. 119, Special Part 98 ngor, dated 10 October, BE2545(2002
G/TBT/Notif. 00.508
TIS1291-2538
THAI INDUSTRIAL STANDARD
FOR
UNINTERRUPTIBLE POWER SYSTEMS
1. Scope
1.1 This standard defines configurations. service conditions. rated values and
performances, characteristic requirements, marking and labelling, sampling and
criteria for conformity and testing for the uninterruptible power systems
1.2 This standard covers single phase uninterruptible power systems of output
power not exceeding 75 KVA per single UPS unit and three phase
uninterruptible power systems of output power not exceeding 1000 KVA per
single UPS unit
1. 3 This standard covers only the uninterruptible power systems which are
designed for electronically converting a.c. supply and capable of storing
converted d. cpower for use in supplying load, either single or three phase, with
regulated output voltage and frequency
2. Definitions
The meaning of terms used In this standard are as follows
2.1 Short-circuit Output Current means the current Which flows from the UPS into
zero impedance load
2.2 Inrush or Inrush current means a current higher than its steady state value
drawn by a device when energized or activated
2.3 Walk-in means a controlled power increase by the UPS from the ac input into
the UPS
2.4 Burn-in means the operation of units or systems prior to their ultimate
application intended to stabilize their characteristics and to identify early
failures
2.5 Load Sharing means the simultaneous supplying of power to a load from two o
more sources
2.6 Variation means the change in the value of a quantity from its mean or typica
value
2.7 Frequency Modulation means the cyclic or random dynamic variation, or both
of instantaneous frequency about a mean frequency during steady-state electric
system operation
2.8 Periodic Output
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