SlideShare a Scribd company logo
Sec2 25
Commercial and industrial solutions for 3 phase distribution
Energy let through 2
I2
t Energy let through
The energy let through by a
breaker determines the
minimum size of the
downstream cable.
Minimum cable size required based on I2
t let through energy of breaker and cable value k=115
Maximum prospective 2 4 5 6 10 15 20 25 30 36 50 65 70 100
fault level in kA
MCB’s
SQO 3/6A 1 1 1 1 - - - - - - - - - -
SQO 10A 1 1.5 1.5 1.5 - - - - - - - - - -
SQO 16/20/25A 1 1.5 1.5 1.5 - - - - - - - - - -
SQO 32/40A 1 1.5 1.5 2.5 - - - - - - - - - -
SQO 50/63A 1.5 1.5 2.5 2.5 - - - - - - - - - -
KQ 6A 1 1 1 1 1 1.5 - - - - - - - -
KQ 10A 1 1.5 1.5 1.5 2.5 2.5 - - - - - - - -
KQ 16/20/25A 1 1.5 1.5 1.5 2.5 2.5 - - - - - - - -
KQ 32/40A 1 2.5 2.5 2.5 2.5 2.5 - - - - - - - -
KQ 50/63A 1.5 2.5 2.5 2.5 2.5 4 - - - - - - - -
KQ 80A 1.5 2.5 2.5 2.5 4 4 - - - - - - - -
KQ 100A 2.5 2.5 2.5 4 4 4 - - - - - - - -
MCCB’s
CDAE/CDLE up to 100A 6 6 6 6 6 6 6 6 - - - - - -
CNAE/CNLE up to 250A 10 10 10 10 10 10 10 10 10 10 - - - -
CHAE/CHLE up to 250A 10 10 10 10 10 10 10 10 10 10 10 - - -
SLA/SLAL up to 400A 16 16 16 35 35 35 35 50 50 50 - - - -
DHLE up to 630A 16 16 16 16 16 16 16 16 16 16 16 - - -
LI/LCL/LIL up to 600A 10 10 10 10 10 10 16 16 16 16 16 16 16 16
SNA/SNAL up to 1250 50 50 50 50 50 50 50 70 70 70 70 - - -
SMA/SMAL/SMHL up to 1000A 25 25 25 25 25 25 25 35 35 70 70 - - -
PA/SPA/SPH up to 2000A 50 50 50 50 50 50 50 70 70 70 70 - - -
Table 31
Current limiting circuit
breakers let through less
energy, therefore the cable
sizes are not an indication of
continuous current ratings.
SQD5727 Electrical App. Sec 2 10/8/05 10:09 pm Page 25
Sec2 27
Commercial and industrial solutions for 3 phase distribution
Cascading - Square D MCCB/MCB 2
Cascading chart
Cascading permits the
installation of a circuit breaker
having a breaking capacity
lower than the prospective at
its point of installation. The
upstream breaker, which must
have the required breaking
capacity, limits the fault
current to that which may
safely be interrupted by the
downstream breaker. In the
case of a high fault current
both breakers may operate.
For example: a LoadCentre KQ
breaker rated at 10kA may be
used at a point in the network
having a prospective fault
current of 40kA provided that
it is protected by a CH
breaker rated 100A (50kA).
Upstream breaker
Downstream breaker
Ref
Rating
Icu
6kA
6kA
10kA
25kA
36kA
36kA
CD
100A
25kA
25
25
25
CN
100A
36kA
25
25
25
36
CN
250A
36kA
30
36
CH
100A
50kA
40
50
50
CH
250A
50kA
30
50
50
SLA
400A
36kA
36
DH
630A
50kA
50
50
SMAL
1000A
50kA
36
50
50
SPAF
2000A
50kA
36
50
50
Reference
SQO
DOM
KQ
CD
CN
SLA
Rating
3 - 63A
3 - 50A
3 - 63A
100A
250A
400A
Table 32
SQD5727 Electrical App. Sec 2 10/8/05 10:09 pm Page 27
Sec2 39
Commercial and industrial solutions for 3 phase distribution
LoadCentre KQ industrial MCB performance figures 2
Type B MCB’s
Rating (A) Zs ohm @ 230V ac R2
5s 0.4s ohms
3 15 15 3.33
6 8 8 1.67
10 5 5 1.00
16 3 3 0.63
20 2.3 2.3 0.50
25 1.8 1.8 0.40
32 1.4 1.4 0.31
40 1.2 1.2 0.25
50 0.9 0.9 0.20
63 0.73 0.73 0.16
Type C MCB’s
Rating (A) Zs ohm @ 230V ac R2
5s 0.4s ohms
6 8 4 1.67
10 5 2.3 1.00
16 3 1.4 0.63
20 2.3 1.2 0.50
25 1.8 0.9 0.40
32 1.4 0.7 0.31
40 1.2 0.6 0.25
50 0.9 0.5 0.20
63 0.73 0.37 0.16
Table 47
Earth loop impedance values.
Type D MCB’s
Rating (A) Zs ohm @ 230V ac R2
5s 0.4s ohms
6 8 2.7 1.67
10 5 1.6 1.00
16 3 1.0 0.63
20 2.3 0.8 0.50
25 1.8 0.7 0.40
32 1.4 0.5 0.31
40 1.2 0.4 0.25
50 0.9 0.3 0.20
63 0.73 0.26 0.16
Type C 80 and 100A MCB’s
Rating (A) Zs ohm @ 230V ac R2
5s 0.4s ohms
80 0.58 0.29 0.13
100 0.46 0.23 0.10
Table 48
SQD5727 Electrical App. Sec 2 10/8/05 10:09 pm Page 39

More Related Content

Similar to sqd-app-guide-2-25c.pdf

Catalogue thiet bi dien abb mccb abb
Catalogue thiet bi dien abb mccb abbCatalogue thiet bi dien abb mccb abb
Catalogue thiet bi dien abb mccb abb
Dien Ha The
 
Cable sizing to withstand short-circuit current - Example
Cable sizing to withstand short-circuit current - ExampleCable sizing to withstand short-circuit current - Example
Cable sizing to withstand short-circuit current - Example
Leonardo ENERGY
 
Thông số MCB LS
Thông số MCB LSThông số MCB LS
Mc74 hc4051 d
Mc74 hc4051 dMc74 hc4051 d
Mc74 hc4051 d
Hugo Alaniz
 
Cataloge schneider catalogue schneider
Cataloge schneider catalogue schneiderCataloge schneider catalogue schneider
Cataloge schneider catalogue schneider
Dien Ha The
 
Cataloge schneider catalogue schneider-dienhathe.vn
Cataloge schneider catalogue schneider-dienhathe.vnCataloge schneider catalogue schneider-dienhathe.vn
Cataloge schneider catalogue schneider-dienhathe.vn
Dien Ha The
 
Cataloge schneider catalogue schneider
Cataloge schneider catalogue schneiderCataloge schneider catalogue schneider
Cataloge schneider catalogue schneider
Dien Ha The
 
Cataloge schneider catalogue schneider
Cataloge schneider catalogue schneiderCataloge schneider catalogue schneider
Cataloge schneider catalogue schneider
Dien Ha The
 
Dtafile2011923105530890
Dtafile2011923105530890Dtafile2011923105530890
Dtafile2011923105530890
maianhbao_6519
 
WEG Contactors Oveload Relays
WEG Contactors Oveload RelaysWEG Contactors Oveload Relays
WEG Contactors Oveload Relays
Allan Bernardino
 
ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...
ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...
ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...
Thorne & Derrick International
 
RK Engineering Load Break Switches.pdf
RK Engineering Load Break Switches.pdfRK Engineering Load Break Switches.pdf
RK Engineering Load Break Switches.pdf
RK Engineering
 
Business Continuity Plans.pptx
Business Continuity Plans.pptxBusiness Continuity Plans.pptx
Business Continuity Plans.pptx
RadenBrahim
 
Bảng giá mitsubishi 2020
Bảng giá mitsubishi 2020Bảng giá mitsubishi 2020
Bảng giá mitsubishi 2020
PhmAnhHuy
 
Bang gia thiet_bi_dien_chint-01-10-2012
Bang gia thiet_bi_dien_chint-01-10-2012Bang gia thiet_bi_dien_chint-01-10-2012
Bang gia thiet_bi_dien_chint-01-10-2012
Lãng Quên
 
Cataloge ge 2.industrial components_dienhathe.com-1_record_plus
Cataloge ge 2.industrial components_dienhathe.com-1_record_plusCataloge ge 2.industrial components_dienhathe.com-1_record_plus
Cataloge ge 2.industrial components_dienhathe.com-1_record_plus
Dien Ha The
 
Cataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plusCataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plus
Thuan Kieu
 
Cataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plusCataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plus
Dien Ha The
 
ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17
ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17
ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17
Thorne & Derrick International
 
Eaton-Product-Aid
Eaton-Product-AidEaton-Product-Aid
Eaton-Product-Aid
Joe Galuska
 

Similar to sqd-app-guide-2-25c.pdf (20)

Catalogue thiet bi dien abb mccb abb
Catalogue thiet bi dien abb mccb abbCatalogue thiet bi dien abb mccb abb
Catalogue thiet bi dien abb mccb abb
 
Cable sizing to withstand short-circuit current - Example
Cable sizing to withstand short-circuit current - ExampleCable sizing to withstand short-circuit current - Example
Cable sizing to withstand short-circuit current - Example
 
Thông số MCB LS
Thông số MCB LSThông số MCB LS
Thông số MCB LS
 
Mc74 hc4051 d
Mc74 hc4051 dMc74 hc4051 d
Mc74 hc4051 d
 
Cataloge schneider catalogue schneider
Cataloge schneider catalogue schneiderCataloge schneider catalogue schneider
Cataloge schneider catalogue schneider
 
Cataloge schneider catalogue schneider-dienhathe.vn
Cataloge schneider catalogue schneider-dienhathe.vnCataloge schneider catalogue schneider-dienhathe.vn
Cataloge schneider catalogue schneider-dienhathe.vn
 
Cataloge schneider catalogue schneider
Cataloge schneider catalogue schneiderCataloge schneider catalogue schneider
Cataloge schneider catalogue schneider
 
Cataloge schneider catalogue schneider
Cataloge schneider catalogue schneiderCataloge schneider catalogue schneider
Cataloge schneider catalogue schneider
 
Dtafile2011923105530890
Dtafile2011923105530890Dtafile2011923105530890
Dtafile2011923105530890
 
WEG Contactors Oveload Relays
WEG Contactors Oveload RelaysWEG Contactors Oveload Relays
WEG Contactors Oveload Relays
 
ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...
ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...
ABB Medium Voltage Indoor Fuses - ABB CEF-S High Voltage Current Limiting Fus...
 
RK Engineering Load Break Switches.pdf
RK Engineering Load Break Switches.pdfRK Engineering Load Break Switches.pdf
RK Engineering Load Break Switches.pdf
 
Business Continuity Plans.pptx
Business Continuity Plans.pptxBusiness Continuity Plans.pptx
Business Continuity Plans.pptx
 
Bảng giá mitsubishi 2020
Bảng giá mitsubishi 2020Bảng giá mitsubishi 2020
Bảng giá mitsubishi 2020
 
Bang gia thiet_bi_dien_chint-01-10-2012
Bang gia thiet_bi_dien_chint-01-10-2012Bang gia thiet_bi_dien_chint-01-10-2012
Bang gia thiet_bi_dien_chint-01-10-2012
 
Cataloge ge 2.industrial components_dienhathe.com-1_record_plus
Cataloge ge 2.industrial components_dienhathe.com-1_record_plusCataloge ge 2.industrial components_dienhathe.com-1_record_plus
Cataloge ge 2.industrial components_dienhathe.com-1_record_plus
 
Cataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plusCataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plus
 
Cataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plusCataloge ge 2.industrial components-1_record_plus
Cataloge ge 2.industrial components-1_record_plus
 
ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17
ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17
ABB KON-17 Medium Voltage MV Outdoor Current Transformers CT's - ABB KON-17
 
Eaton-Product-Aid
Eaton-Product-AidEaton-Product-Aid
Eaton-Product-Aid
 

More from Nafir Anas

dokumen.tips_500-kv-substation-grounding-presentation.pdf
dokumen.tips_500-kv-substation-grounding-presentation.pdfdokumen.tips_500-kv-substation-grounding-presentation.pdf
dokumen.tips_500-kv-substation-grounding-presentation.pdf
Nafir Anas
 
D.pdf
D.pdfD.pdf
D.pdf
Nafir Anas
 
1694355611974.pdf
1694355611974.pdf1694355611974.pdf
1694355611974.pdf
Nafir Anas
 
ITEP-2021-03-FCL Expertise.pdf
ITEP-2021-03-FCL Expertise.pdfITEP-2021-03-FCL Expertise.pdf
ITEP-2021-03-FCL Expertise.pdf
Nafir Anas
 
330377138-Conf-Tested-Assemblies-Iec-61439.pdf
330377138-Conf-Tested-Assemblies-Iec-61439.pdf330377138-Conf-Tested-Assemblies-Iec-61439.pdf
330377138-Conf-Tested-Assemblies-Iec-61439.pdf
Nafir Anas
 
PPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).ppt
PPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).pptPPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).ppt
PPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).ppt
Nafir Anas
 
231896.ppt
231896.ppt231896.ppt
231896.ppt
Nafir Anas
 
5010566.ppt
5010566.ppt5010566.ppt
5010566.ppt
Nafir Anas
 
1VGA671004 - UniGear ZVC Standard Product.ppt
1VGA671004 - UniGear ZVC Standard Product.ppt1VGA671004 - UniGear ZVC Standard Product.ppt
1VGA671004 - UniGear ZVC Standard Product.ppt
Nafir Anas
 
3.-Invar.pdf
3.-Invar.pdf3.-Invar.pdf
3.-Invar.pdf
Nafir Anas
 
acsr-standard.pdf
acsr-standard.pdfacsr-standard.pdf
acsr-standard.pdf
Nafir Anas
 
150110188-SUBSTATION-AUTOMATION.pdf
150110188-SUBSTATION-AUTOMATION.pdf150110188-SUBSTATION-AUTOMATION.pdf
150110188-SUBSTATION-AUTOMATION.pdf
Nafir Anas
 

More from Nafir Anas (12)

dokumen.tips_500-kv-substation-grounding-presentation.pdf
dokumen.tips_500-kv-substation-grounding-presentation.pdfdokumen.tips_500-kv-substation-grounding-presentation.pdf
dokumen.tips_500-kv-substation-grounding-presentation.pdf
 
D.pdf
D.pdfD.pdf
D.pdf
 
1694355611974.pdf
1694355611974.pdf1694355611974.pdf
1694355611974.pdf
 
ITEP-2021-03-FCL Expertise.pdf
ITEP-2021-03-FCL Expertise.pdfITEP-2021-03-FCL Expertise.pdf
ITEP-2021-03-FCL Expertise.pdf
 
330377138-Conf-Tested-Assemblies-Iec-61439.pdf
330377138-Conf-Tested-Assemblies-Iec-61439.pdf330377138-Conf-Tested-Assemblies-Iec-61439.pdf
330377138-Conf-Tested-Assemblies-Iec-61439.pdf
 
PPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).ppt
PPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).pptPPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).ppt
PPT-Surge-Protection-Technical-Background-and-Basics-Presentation_1 (1).ppt
 
231896.ppt
231896.ppt231896.ppt
231896.ppt
 
5010566.ppt
5010566.ppt5010566.ppt
5010566.ppt
 
1VGA671004 - UniGear ZVC Standard Product.ppt
1VGA671004 - UniGear ZVC Standard Product.ppt1VGA671004 - UniGear ZVC Standard Product.ppt
1VGA671004 - UniGear ZVC Standard Product.ppt
 
3.-Invar.pdf
3.-Invar.pdf3.-Invar.pdf
3.-Invar.pdf
 
acsr-standard.pdf
acsr-standard.pdfacsr-standard.pdf
acsr-standard.pdf
 
150110188-SUBSTATION-AUTOMATION.pdf
150110188-SUBSTATION-AUTOMATION.pdf150110188-SUBSTATION-AUTOMATION.pdf
150110188-SUBSTATION-AUTOMATION.pdf
 

Recently uploaded

[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
Vietnam Cotton & Spinning Association
 
06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus
Timothy Spann
 
一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理
一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理
一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理
eoxhsaa
 
A gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented GenerationA gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented Generation
dataschool1
 
Call Girls Hyderabad (india) ☎️ +91-7426014248 Hyderabad Call Girl
Call Girls Hyderabad  (india) ☎️ +91-7426014248 Hyderabad  Call GirlCall Girls Hyderabad  (india) ☎️ +91-7426014248 Hyderabad  Call Girl
Call Girls Hyderabad (india) ☎️ +91-7426014248 Hyderabad Call Girl
sapna sharmap11
 
Senior Engineering Sample EM DOE - Sheet1.pdf
Senior Engineering Sample EM DOE  - Sheet1.pdfSenior Engineering Sample EM DOE  - Sheet1.pdf
Senior Engineering Sample EM DOE - Sheet1.pdf
Vineet
 
一比一原版(uob毕业证书)伯明翰大学毕业证如何办理
一比一原版(uob毕业证书)伯明翰大学毕业证如何办理一比一原版(uob毕业证书)伯明翰大学毕业证如何办理
一比一原版(uob毕业证书)伯明翰大学毕业证如何办理
9gr6pty
 
Drownings spike from May to August in children
Drownings spike from May to August in childrenDrownings spike from May to August in children
Drownings spike from May to August in children
Bisnar Chase Personal Injury Attorneys
 
Sid Sigma educational and problem solving power point- Six Sigma.ppt
Sid Sigma educational and problem solving power point- Six Sigma.pptSid Sigma educational and problem solving power point- Six Sigma.ppt
Sid Sigma educational and problem solving power point- Six Sigma.ppt
ArshadAyub49
 
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
Timothy Spann
 
Interview Methods - Marital and Family Therapy and Counselling - Psychology S...
Interview Methods - Marital and Family Therapy and Counselling - Psychology S...Interview Methods - Marital and Family Therapy and Counselling - Psychology S...
Interview Methods - Marital and Family Therapy and Counselling - Psychology S...
PsychoTech Services
 
[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024
Vietnam Cotton & Spinning Association
 
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
oaxefes
 
一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理
一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理
一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理
zoykygu
 
一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理
一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理
一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理
nyvan3
 
一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理
一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理
一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理
ywqeos
 
一比一原版(UO毕业证)渥太华大学毕业证如何办理
一比一原版(UO毕业证)渥太华大学毕业证如何办理一比一原版(UO毕业证)渥太华大学毕业证如何办理
一比一原版(UO毕业证)渥太华大学毕业证如何办理
bmucuha
 
一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理
ugydym
 
Senior Software Profiles Backend Sample - Sheet1.pdf
Senior Software Profiles  Backend Sample - Sheet1.pdfSenior Software Profiles  Backend Sample - Sheet1.pdf
Senior Software Profiles Backend Sample - Sheet1.pdf
Vineet
 
Call Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance Payment
Call Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance PaymentCall Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance Payment
Call Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance Payment
prijesh mathew
 

Recently uploaded (20)

[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics May 2024
 
06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus06-18-2024-Princeton Meetup-Introduction to Milvus
06-18-2024-Princeton Meetup-Introduction to Milvus
 
一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理
一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理
一比一原版多伦多大学毕业证(UofT毕业证书)学历如何办理
 
A gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented GenerationA gentle exploration of Retrieval Augmented Generation
A gentle exploration of Retrieval Augmented Generation
 
Call Girls Hyderabad (india) ☎️ +91-7426014248 Hyderabad Call Girl
Call Girls Hyderabad  (india) ☎️ +91-7426014248 Hyderabad  Call GirlCall Girls Hyderabad  (india) ☎️ +91-7426014248 Hyderabad  Call Girl
Call Girls Hyderabad (india) ☎️ +91-7426014248 Hyderabad Call Girl
 
Senior Engineering Sample EM DOE - Sheet1.pdf
Senior Engineering Sample EM DOE  - Sheet1.pdfSenior Engineering Sample EM DOE  - Sheet1.pdf
Senior Engineering Sample EM DOE - Sheet1.pdf
 
一比一原版(uob毕业证书)伯明翰大学毕业证如何办理
一比一原版(uob毕业证书)伯明翰大学毕业证如何办理一比一原版(uob毕业证书)伯明翰大学毕业证如何办理
一比一原版(uob毕业证书)伯明翰大学毕业证如何办理
 
Drownings spike from May to August in children
Drownings spike from May to August in childrenDrownings spike from May to August in children
Drownings spike from May to August in children
 
Sid Sigma educational and problem solving power point- Six Sigma.ppt
Sid Sigma educational and problem solving power point- Six Sigma.pptSid Sigma educational and problem solving power point- Six Sigma.ppt
Sid Sigma educational and problem solving power point- Six Sigma.ppt
 
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
06-20-2024-AI Camp Meetup-Unstructured Data and Vector Databases
 
Interview Methods - Marital and Family Therapy and Counselling - Psychology S...
Interview Methods - Marital and Family Therapy and Counselling - Psychology S...Interview Methods - Marital and Family Therapy and Counselling - Psychology S...
Interview Methods - Marital and Family Therapy and Counselling - Psychology S...
 
[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024
[VCOSA] Monthly Report - Cotton & Yarn Statistics March 2024
 
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
一比一原版卡尔加里大学毕业证(uc毕业证)如何办理
 
一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理
一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理
一比一原版(heriotwatt学位证书)英国赫瑞瓦特大学毕业证如何办理
 
一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理
一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理
一比一原版英国赫特福德大学毕业证(hertfordshire毕业证书)如何办理
 
一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理
一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理
一比一原版(lbs毕业证书)伦敦商学院毕业证如何办理
 
一比一原版(UO毕业证)渥太华大学毕业证如何办理
一比一原版(UO毕业证)渥太华大学毕业证如何办理一比一原版(UO毕业证)渥太华大学毕业证如何办理
一比一原版(UO毕业证)渥太华大学毕业证如何办理
 
一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理一比一原版南昆士兰大学毕业证如何办理
一比一原版南昆士兰大学毕业证如何办理
 
Senior Software Profiles Backend Sample - Sheet1.pdf
Senior Software Profiles  Backend Sample - Sheet1.pdfSenior Software Profiles  Backend Sample - Sheet1.pdf
Senior Software Profiles Backend Sample - Sheet1.pdf
 
Call Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance Payment
Call Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance PaymentCall Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance Payment
Call Girls Hyderabad ❤️ 7339748667 ❤️ With No Advance Payment
 

sqd-app-guide-2-25c.pdf

  • 1. Sec2 25 Commercial and industrial solutions for 3 phase distribution Energy let through 2 I2 t Energy let through The energy let through by a breaker determines the minimum size of the downstream cable. Minimum cable size required based on I2 t let through energy of breaker and cable value k=115 Maximum prospective 2 4 5 6 10 15 20 25 30 36 50 65 70 100 fault level in kA MCB’s SQO 3/6A 1 1 1 1 - - - - - - - - - - SQO 10A 1 1.5 1.5 1.5 - - - - - - - - - - SQO 16/20/25A 1 1.5 1.5 1.5 - - - - - - - - - - SQO 32/40A 1 1.5 1.5 2.5 - - - - - - - - - - SQO 50/63A 1.5 1.5 2.5 2.5 - - - - - - - - - - KQ 6A 1 1 1 1 1 1.5 - - - - - - - - KQ 10A 1 1.5 1.5 1.5 2.5 2.5 - - - - - - - - KQ 16/20/25A 1 1.5 1.5 1.5 2.5 2.5 - - - - - - - - KQ 32/40A 1 2.5 2.5 2.5 2.5 2.5 - - - - - - - - KQ 50/63A 1.5 2.5 2.5 2.5 2.5 4 - - - - - - - - KQ 80A 1.5 2.5 2.5 2.5 4 4 - - - - - - - - KQ 100A 2.5 2.5 2.5 4 4 4 - - - - - - - - MCCB’s CDAE/CDLE up to 100A 6 6 6 6 6 6 6 6 - - - - - - CNAE/CNLE up to 250A 10 10 10 10 10 10 10 10 10 10 - - - - CHAE/CHLE up to 250A 10 10 10 10 10 10 10 10 10 10 10 - - - SLA/SLAL up to 400A 16 16 16 35 35 35 35 50 50 50 - - - - DHLE up to 630A 16 16 16 16 16 16 16 16 16 16 16 - - - LI/LCL/LIL up to 600A 10 10 10 10 10 10 16 16 16 16 16 16 16 16 SNA/SNAL up to 1250 50 50 50 50 50 50 50 70 70 70 70 - - - SMA/SMAL/SMHL up to 1000A 25 25 25 25 25 25 25 35 35 70 70 - - - PA/SPA/SPH up to 2000A 50 50 50 50 50 50 50 70 70 70 70 - - - Table 31 Current limiting circuit breakers let through less energy, therefore the cable sizes are not an indication of continuous current ratings. SQD5727 Electrical App. Sec 2 10/8/05 10:09 pm Page 25
  • 2. Sec2 27 Commercial and industrial solutions for 3 phase distribution Cascading - Square D MCCB/MCB 2 Cascading chart Cascading permits the installation of a circuit breaker having a breaking capacity lower than the prospective at its point of installation. The upstream breaker, which must have the required breaking capacity, limits the fault current to that which may safely be interrupted by the downstream breaker. In the case of a high fault current both breakers may operate. For example: a LoadCentre KQ breaker rated at 10kA may be used at a point in the network having a prospective fault current of 40kA provided that it is protected by a CH breaker rated 100A (50kA). Upstream breaker Downstream breaker Ref Rating Icu 6kA 6kA 10kA 25kA 36kA 36kA CD 100A 25kA 25 25 25 CN 100A 36kA 25 25 25 36 CN 250A 36kA 30 36 CH 100A 50kA 40 50 50 CH 250A 50kA 30 50 50 SLA 400A 36kA 36 DH 630A 50kA 50 50 SMAL 1000A 50kA 36 50 50 SPAF 2000A 50kA 36 50 50 Reference SQO DOM KQ CD CN SLA Rating 3 - 63A 3 - 50A 3 - 63A 100A 250A 400A Table 32 SQD5727 Electrical App. Sec 2 10/8/05 10:09 pm Page 27
  • 3. Sec2 39 Commercial and industrial solutions for 3 phase distribution LoadCentre KQ industrial MCB performance figures 2 Type B MCB’s Rating (A) Zs ohm @ 230V ac R2 5s 0.4s ohms 3 15 15 3.33 6 8 8 1.67 10 5 5 1.00 16 3 3 0.63 20 2.3 2.3 0.50 25 1.8 1.8 0.40 32 1.4 1.4 0.31 40 1.2 1.2 0.25 50 0.9 0.9 0.20 63 0.73 0.73 0.16 Type C MCB’s Rating (A) Zs ohm @ 230V ac R2 5s 0.4s ohms 6 8 4 1.67 10 5 2.3 1.00 16 3 1.4 0.63 20 2.3 1.2 0.50 25 1.8 0.9 0.40 32 1.4 0.7 0.31 40 1.2 0.6 0.25 50 0.9 0.5 0.20 63 0.73 0.37 0.16 Table 47 Earth loop impedance values. Type D MCB’s Rating (A) Zs ohm @ 230V ac R2 5s 0.4s ohms 6 8 2.7 1.67 10 5 1.6 1.00 16 3 1.0 0.63 20 2.3 0.8 0.50 25 1.8 0.7 0.40 32 1.4 0.5 0.31 40 1.2 0.4 0.25 50 0.9 0.3 0.20 63 0.73 0.26 0.16 Type C 80 and 100A MCB’s Rating (A) Zs ohm @ 230V ac R2 5s 0.4s ohms 80 0.58 0.29 0.13 100 0.46 0.23 0.10 Table 48 SQD5727 Electrical App. Sec 2 10/8/05 10:09 pm Page 39