Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

QOU230VH Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers

Part # QOU230VH
Description  QOU Miniature Circuit Breakers and Switches Unit Mount (Cable-in/Cable-out)
Download  32 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ETC2 [List of Unclassifed Manufacturers]
Direct Link  
Logo ETC2 - List of Unclassifed Manufacturers

QOU230VH Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers

Back Button QOU230VH Datasheet HTML 5Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 6Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 7Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 8Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 9Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 10Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 11Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 12Page - List of Unclassifed Manufacturers QOU230VH Datasheet HTML 13Page - List of Unclassifed Manufacturers Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 32 page
background image
QOU Miniature Circuit Breakers and Switches
Application Information
9
09/2005
© 2005 Schneider Electric All Rights Reserved
Ambient Temperature Rating
To meet the requirements of UL 489 and the Canadian Standards Association, thermal-magnetic
circuit breakers are designed, built and calibrated for use on 50/60 Hz ac systems in a 104° F (40° C)
ambient temperature. Time/current characteristic trip curves are drawn from actual test data that meets
UL 489 testing requirements.
The ambient temperature is the temperature of the air surrounding the circuit breaker. Thermal-
magnetic circuit breakers are temperature-sensitive devices, and their rated continuous current
carrying capacity is based on a UL specified 104° F (40° C) calibration temperature. The ambient
temperature can affect the performance characteristics of the circuit breaker. Thus, when applying a
circuit breaker at temperatures other than 104° F (40° C), it is necessary to determine the circuit
breaker’s actual current carrying capacity under this condition. Further, it may be necessary to rerate
the circuit breaker to compensate for these ambient conditions. See Figure 3:
Thermal-magnetic circuit breakers use bimetal strips that bend in response to temperature changes.
Current flowing through the circuit breaker creates most of the heat that causes the tripping action. The
ambient temperature surrounding the circuit breaker either adds to or subtracts from this available
heat. Conductors are sized using the ampacity rerating factors shown on the bottom of NEC Table
310-16 when designing systems for ambient temperatures other than 40° C.
Rerating of Thermal-magnetic Circuit Breakers for Ambient Conditions
Square D thermal-magnetic circuit breakers are to be applied in ambient temperatures within the range
of 14° F to 140° F (-10° C to 60° C). Use the following rerating guidelines:
Ambient Temperatures Between 77° F and 104° F (25° C and 40° C):
— No rerating is necessary.
Ambient Temperatures Between 14° F and 75° F (-10° C and 24° C):
— Thermal-magnetic circuit breakers operating within this ambient temperature range will carry
more than their continuous current rating without tripping. Conductor and equipment damage
can result if they are not in the same low ambient environment as the circuit breaker.
— Nuisance tripping will not be a problem. However, if closer protection of the equipment and
conductor is required, the increased current carrying capacity of the circuit breaker at the lower
ambient temperature should be taken into consideration.
Ambient Temperatures Between 106° F and 140° F (41° C and 60° C):
— Thermal-magnetic circuit breakers operating within this ambient temperature range will carry
less than their continuous current rating and must be carefully selected to prevent nuisance
tripping.
To determine the continuous current carrying capacity of a thermal-magnetic circuit breaker at an
ambient temperature other than 104° F (40° C), perform the following steps:
1. Choose the ambient rerating curve in Figure 3 for the specific amperage rating of the circuit breaker
you wish to apply. Note that the curve crosses the 104° F (40° C) ambient temperature line at the
circuit breaker’s rated continuous current carrying capacity (Circuit Breaker Handle Rating on the
curve).
2. Follow this curve to the appropriate ambient temperature.
3. Read the adjusted continuous current carrying capacity at this point (on the left axis).
4. Add in any other applicable factors, such as continuous loading, per the NEC requirement.


Similar Part No. - QOU230VH

ManufacturerPart #DatasheetDescription
logo
Schneider Electric
QOU230VH1201 SCHNEIDER-QOU230VH1201 Datasheet
98Kb / 2P
   QOU Miniature Circuit Breaker, 30A, 2P, 120/240V, 22kA, Aux Switch
QOU230VH5283 SCHNEIDER-QOU230VH5283 Datasheet
95Kb / 2P
   QOU Miniature Circuit Breaker, 30A, 2P, 120/240V, 22kA, Ring Terminal
More results

Similar Description - QOU230VH

ManufacturerPart #DatasheetDescription
logo
ABB
S200 ABB-S200 Datasheet
7Mb / 100P
   Miniature circuit breakers
Rev. A
logo
List of Unclassifed Man...
V4-T1-6 ETC2-V4-T1-6 Datasheet
2Mb / 98P
   Miniature Circuit Breakers and Supplementary Protectors
logo
Siemens Semiconductor G...
5SX2 SIEMENS-5SX2 Datasheet
1Mb / 64P
   Miniature Circuit-Breakers (MCBs)
2.1 2001
logo
Altech corporation
H1COL ALTECH-H1COL Datasheet
5Mb / 16P
   Miniature Molded Case Circuit Breakers
2229.0 ALTECH-2229.0 Datasheet
312Kb / 2P
   Miniature Circuit Breakers / Manual Motor Controllers DIN Rail and Panel Mount Terminal Blocks
2800.0 ALTECH-2800.0 Datasheet
366Kb / 2P
   Miniature Circuit Breakers / Manual Motor Controllers DIN Rail and Panel Mount Terminal Blocks
logo
PHOENIX CONTACT
TMC81C01A PHOENIX-TMC81C01A Datasheet
790Kb / 13P
   Thermal magnetic UL 489 miniature circuit breakers
logo
Weidmuller
BR1C10UC WEIDMULLER-BR1C10UC Datasheet
4Mb / 32P
   UL 489 and UL 1077 DIN-Rail Miniature Circuit Breakers
logo
PHOENIX CONTACT
3644 PHOENIX-3644 Datasheet
790Kb / 13P
   Thermal magnetic UL 489 miniature circuit breakers
2016-06-14
logo
NTE Electronics
R58 NTE-R58 Datasheet
496Kb / 1P
   Circuit Breakers
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com