Electrical Principles

 

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http://furutec.com.my BUSBAR / BUS WAY Email: furutec@eita.com.my
http://multib.com.my/ Tel: +603 5635 7088
Fax: +603 5635 6099
http://www.naxso.com

saju-01755-660068

info@abxbdltd.com

naxsonaxso@icloud.com
http://www.graziadio.it Hashem Electric Co. Ltd. (HEC) http://www.hecbd.com/ info@graziadio.it

hec@hecbd.com

http://www.eae.com.tr BUSBAR / BUS WAY
http://www.dbts-ind.com BUSBAR / BUS WAY
http://multib.com.my BUSBAR / BUS WAY
http://www.xelon.gr BUSBAR / BUS WAY
http://www.dtmbusbar.com Engr.AJM Nasir Uddin

01717328481

 info@regencypower.com.bd
http://www.LNTEBG.com BUSBAR / BUS WAY
http://woehner.com BUSBAR / BUS WAY
http://www.klibo.com info@klibo.de PLC Parker
http://elecpart.com/ Electrical
http://www.altechcorp.com Electrical
http://www.westshorecontrols.com/ Electrical
http://www.invertekdrives.com/ Electrical plc
https://www.erico.com/
BUSBARS
http://www.elsteel.com/ busbar cabinat.
 http://www.deltaelectric.ws  United Arab Emirates

Director : md@deltaelectric.ws
Sales office : salesauh1@deltaelectric.ws

 busbar cabinat./ UAE
 http://www.busbare.com  busbar
 http://www.klmgroup.ru/  sales@klmgroup.ru  busbar

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JIANGSU HUACHEN TRANSFORMER CO.,LTD.

http://www.transformer-hc.com/contact.html

CONTACT US

+86- 516-66697333
+86-13813479855
86- 516-82300676
info@hcbyq.com
Tongshan Economic Development Zone Industrial Park , No. 2 Qianjiang Road, Xuzhou, Jiangsu Province.

CONTACT US

GENERAL INDUSTRIAL CONTROLS PRIVATE LIMITED.

T – 107, MIDC Bhosari,
Pune 411026
Maharashtra, INDIA.
Fax : +91-20 27122574

Marketing & Sales:
Tel : +91-20 30680003
+91-20 30680004
+91-20 30680011
+91-20 30680031
Materials:

Tel : +91-20 30680009

HR & Administration:

Tel : +91-20 30680023

Accounts:

Tel : +91-20 30680005

 

 

 

Langir® Electric Co.,LTD.

langir-logo (1)

http://www.sunshinele.com/contact.html

4F, No.188 Liuqing North Road,
Liushi, Wenzhou, China
325604

Telephone: 86-577-62737672

Fax: 86 (577) 62737671

Website: http://www.langir.com
Piezo Swtiches: http://www.piezo-switch.com
Vandal Resistant Switch: http://www.vandal-resistant-switch.com

http://www.hagerelectro.com.au/e-catalogue/energy-distribution/main-switches/h3-mccb-features/4583.htm

DesignBig

 

sb

http://www.chinamorsun.com/index.asp

Nsx-MCCB

David Chang

Managing Director

Morning Sun Electric Co.,Ltd

Add:No.358,Liujiang rd,,liushi town,yueqing city,zhejiang province,China

Tel:0086-577-61586783

Fax:0086-577-61586785

MSN:morsun18@hotmail.com

GMAIL:morsun818@gmail.com

SKYPE:morsun818

Yhaoo messenger:morsun818@yahoo.com.cn

 

 

 

s160-sj_3p_fw_-diagonal-2576x3117

http://www.terasaki.com/

logotera_azul (1)

 

http://www.electric-find.com/manufacturers/manufacturers.htm

Electrical Manufacturers

Manufacturers1186 – Alphabetically Listing

 A  H  O  V  B  I  P  W   C  J  Q  X  D  K 

 R  Y  E  L  S  Z  F  M  T   G  N  U  

HomeLightingManufacturersPowerMfg. RepsUPS SystemsSuppliersControlsEngineersAlarmsContractorsCommunicationsAssociationsDatacomPublicationsRacewaysCode/ListingFittingsLicensingWire/CableSearch EnginesDevicesAdd Your SiteHeat/FansDefinitionsMotors

 

CMC MANCUFACTURING CO PVT LTD

85 Netaji Subhas Road, 1st floor
Kolkata – 700001
West Bengal
India

Phone No:
+91 9830045610
Office: +91 33 2243 3433
Fax: +91 33 2337 9333
Email: cmc@cmcpl.co.incmc.kolkata85@gmail.com

http://www.cmcpl.co.in/

 

 

 

 

logo (1)

http://www.efen-sales.com/en/Measurement-and-Communication/Low-Voltage-Current-Transformers/

 

 

-: Electrical Manufacturing Company China:-

Zhejiang CHINT Electrics Co.Ltd.
End:No.1, CHINT Road, CHINT Industrial Zone, North Baixiang, Yueqing, Zhejiang Province.
Tel: 86-577-62777777
E-mail: global-sales@chint.com

Fax:+86-577-62763717
E-mail: global-sales@chint.com
Website: http://www.chint.net.

www.chintelectrics.es

www.chint-sy.com

Corporate Office

No. 332/2, Galle Road,
Colombo – 3.
Sri lanka.

Tel : 011 2 301915 – 011 2 301996
Facsimile : 011 2 301977
Email: info@chintsrilanka.com
Web : http://www.chintsrilanka.com
http://en.chintelectric.com/

http://chint.co.uk

-font-b-CHINT-b-font-CJX2-5011-AC-font-b-Contactor-b-font-Voltage-380V

 

catalog nueva_tarifa2014

2014 Chint catalogue

Chint product list -mccb

CHINT – Current Transformer & Potential Transformer

keyu-LOGO
Kangyu Electrical CO.,LTD.
  NO.136-138,XinGuang Road,XinGuang Industrial Zone, Liushi,Yueqing, Wenzhou, Zhejiang, China
 Tel: +86-0577-27870130/62729766
 E-mail: kayal@kayal.cc
 Fax: +86-0577-27870888

3Pole-110V-220V-380V-9A-22A-32A

http://jvele.com/

 

Address: Building A3,Fandouyan Industrial,
liushi,Yueqing,Wenzhou,China

Tel: 086-0577-62870351

Fax: 086-0577-62895580

Website: http://www.jvele.com

Email: jv@jvele.com

Skype:lynnliu8568

Skype:bruce.li15067740790

 

 

Add: Building A3,Fandouyan Industrial, Liushi,Yueqing,Wenzhou,China

Tel: 086-0577-62870351

Fax: 086-0577-62895580

Website: http://www.jvele.com

Email: jv@jvele.com

 

 

Meba Electric Co.,Ltd

Add:Huancheng Rd,

Liushi,Wenzhou,China.

Tel:+86-577-27866868 Fax:+86-577-27866767

Email: info@meba.net

http://www.meba.net/category/switchboard/

 

http://www.ipricelist.in/schneider-electric-price-list/

 

BUS BAR TRUNKING

 

DTM Elektroteknik San. Tic. A.S.
Catalmese Mah. Sultansuyu Cad. No.: 119;   81270

Alemdar – İstanbul, Turkey
Tel.: +90 216 – 429 51 74 (pbx)
Fax: +90 216 – 429 47 88
E – Mail: info@dtm-enclosures.com

 

 

http://www.eae-web.com/pages/230/229/t/en-US/Busbar_General.aspx

http://www.eae.com.tr/EAE-ENG/

EAE ELEKTRİK A.Ş 
Akçaburgaz Mah. 119. Sok. No:10 34510 Esenyurt – İstanbul / TÜRKİYE
Tel:   0212 – 866 20 00
Faks: 0212 – 886 24 20
EAE AYDINLATMA A.Ş
İkitelli Org.San.Bölg. Ziya Gökalp Mah. Eski Turgut Özal Cd.No:20
34490 Başakşehir – İstanbul / TÜRKİYE
Tel:   0212 – 549 97 13 (pbx)
Faks: 0212 – 549 37 90
http://www.eaeaydinlatma.com/
EAE ELEKTROTEKNİK A.Ş
İkitelli Org.San.Bölg. Ziya Gökalp Mah. Eski Turgut Özal Cd.No:20
34490 Başakşehir – İstanbul / TÜRKİYE
Tel:  0212 – 549 26 39
Fax: 0212 – 549 37 91
http://www.eae-et.com.tr
EAE MAKİNA A.Ş.
İkitelli Organize Sanayi Bölg. Ziya Gökalp Mh. Eski Turgut Özal Cd. No:20
34490 Başakşehir -İSTANBUL / TÜRKİYE
Tel:  0212 549 95 66 / 549 95 67
Fax: 0212 549 95 68
http://www.eaemachinery.com/
EAE İTALYA Srl.
SEDE LEGALE
Via Visconti di Modrone 18 20122 Milano – Italy
SEDE COMMERCIALE Via Degli Alpini 14 20090 Segrate (MI) – Italy
T. (+39) 02.36555400
F. (+39) 02.36555579
http://www.eaeitalia.it/
EAE ELEKTRİK RUSYA
 Ул.Павловская, д.7 / Москва / Россия
Тел : +7 (495) 510-66-01
Факс: +7 (495) 510-66-01
E-mail: hseferoglu@eae.com.tr

local agents bangladesh

4S Energy System

  • Address:
    HM Plaza(14th Floor), Road No#02, Sector# 03, Uttara C/A, Dhaka-1230, Bngladesh.
  • Phone: +88-02-7913642
  • Email: info@4senergy-bd.com

 

http://graziadio.ru/en/catalogue-and-price-list/gda-plug-in-distribution-busbar-63-2500-a/

logo_graziadio

CONTATTI

Graziadio & C. S.p.A
Via Pellice, 75
10098 Rivoli (To) – Italia
Tel.+390119591991
Fax+390119574273
E-mail: info@graziadio.it

 

Commerciale Estero

Dr. Luca RigazziDirettore vendite
E-mail: luca@graziadio.it
Tel: +39 011 9591991
Fax: +39 011 9574273
luca.rigazzi
Italy United Kingdom(Great Britain) France

Luca

 

 

Dott.sa Debora Basile
E-mail: debora@graziadio.it
Tel: +39 011 9591991 int. 702
Fax: +39 011 9574273
 debora-graziadio
Italy United Kingdom(Great Britain) France
Orario lavoro: Lun-Ven 9.00-12.00 / 12.30-17.30

Debora.B

 

 

Dott.ssa. Olga Rorato

E-mail: commerce@graziadio.it
Tel: +39 011 9591991 int. 704
Fax: +39 011 9574273
olga-graziadio
Italy United Kingdom(Great Britain) France
Orario lavoro: Lun-Ven 9.00-12.00 / 13.00-18.00

 

 

Dott.sa Rugile Fliotovaite
E-mail: rugile@graziadio.it
Tel: +39 011 9591991 int. 791
Fax: +39 011 9574273
rugile-graziadio
Italy Lithuania United Kingdom(Great Britain) rs-lgflag
Orario lavoro: Lun-Ven 9.00-12.00 / 12.30-17.30

Rugile

Ufficio Tecnico

Ing. Mirko Cavatore Ercole
E-mail: tecnico@graziadio.it
Tel: +39 011 9591991 int. 710
Fax: +39 011 9574273
mirko-graziadio
Italy United Kingdom(Great Britain)
Orario lavoro: Lun-Ven 8.00-12.00 / 13.00-17.00

Mirko

 

 

Maurizio Leto
E-mail: maurizio@graziadio.it
Tel: +39 011 9591991 int. 706
Fax: +39 011 9574273
maurizio.leto-graziadio
Italy United Kingdom(Great Britain)
Orario lavoro: Lun-Ven 8.00-12.00 / 13.00-17.00

Maurizio

 

 

Ing. Marco Domenico Nicola
E-mail: gtec@graziadio.it
Tel: +39 011 9591991 int. 708
Fax: +39 011 9574273
marco-graziadiospa
Italy United Kingdom(Great Britain)
Orario lavoro: Lun-Ven 8.00-12.00 / 13.00-17.00

Marco.N

 

 

Alex Piscioneri
E-mail: tecnico2@graziadio.it
Tel: +39 011 9591991 int. 705
Fax: +39 011 9574273
alex-graziadiospa
Italy
Orario lavoro: Lun-Ven 8.00-12.00 / 13.00-17.00

Alex

 

 

Arch. Paola Raguseo
E-mail: produzione2@graziadio.it
Tel: +39 011 9591991 int. 732
Fax: +39 011 9574273
paola-graziadiospa
Italy United Kingdom(Great Britain) France
Orario lavoro: Lun-Ven 8.00-12.00 / 13.00-17.00

Paola

ontact Us

Graziadio UK
Unit 2, 280 Foleshill Road
Coventry, CV6 5AH

02476 706109
02476 706101

sales@graziadio.co.uk

Mon – Fri 8.00 – 17.00
Saturday – Sunday CLOSED

 

_________________________________________________________

ABB-motors-1

Your local ABB Sales Team

Name

Arifuzzaman Kaiser

Address

ABB Limited 121C Gulshan Avenue 3rd Floor; Gulshan 2 1212 Dhaka

Fax

+88 029850906

_________________________________________________________

IMG_2773-788x588

Our office in Bangladesh

14th Floor, East Wing,
Green Delta AIMS Tower, 51-52,
Mohakhali C/A,
Dhaka-1212,
Bangladesh
Tel. +88-02-9850603,

Tel. +88-02-9850560

 

National Distributor

ADEX Corporation Ltd
3rd Floor, Baitul Abed
53, Purana Paltan
Dhaka-1000
Bangladesh
Website: www.adexbd.com
Email: adex@dhaka.net
Email: info@adexbd.com
Tel. 88-02-9559868
Tel. 88-02-9560626
Area of focus: Motor Control
& Protection Component,
MCCB & ACB

MIR Trading Ltd.
House – 55/1, Road – 8/A,
Dhanmondi, Dhaka – 1209,
Bangladesh
Email: mir.minhaz@gmail.com
Tel. +88-02-9134705
Tel. +88-02-8112800
Area of focus: Wiring devices,
MCCB, Final distribution
component – MCB, SPD, etc.
PFI Component, meter,
signaling component, EVOLIS-VCB,
Protection relay ACB

Packard Engineering Ltd.
Suite No. 901
8th Floor, Shabbir Tower
3/4 A, Purana Paltan
Dhaka – 1000
Bangladesh
Website: www.packardbd.com
Email: packardengineeringltd@gmail.com
Tel. +88-02-956 5298
Area of focus: Motor control
& protection component, MCCB,
ACB final distribution
component – MCB, SPD, etc.

GreenPower Electrical & Electronics
Suite No. 901
8th Floor, Shabbir Tower
3/4 A, Purana Paltan
Dhaka – 1000
Bangladesh
Email: gulzer@greenpower.com.bd
Tel. +88-02-8032647
Tel. +88-02-8032648
Tel. +88-02-9007247
Area of focus: VCB, Protection relay,
ACB, MCCB, MCB & PFI component

Specialized Distributor

ADEX Corporation Ltd.
3rd Floor, Baitul Abed
53, Purana Paltan
Dhaka-1000
Bangladesh
Email: info@adexbd.com
Email: adex@dhaka.net
Tel. +88-02-9559868
Tel. +88-02-9560626
Website: www.adexbd.com
Area of focus: Busbar Trunking System

MIR Trading Ltd.
House – 55/1, Road – 8/A,
Dhanmondi, Dhaka – 1209,
Bangladesh
Email: mir.minhaz@gmail.com
Tel. +88-02-8112800
Tel. +88-02-9134705
Area of focus: Low voltage assembly, Tested Panel- Prisma iPM

XEBEC Trading Services
Happy Rahman Plaza, Kazi Nazrul
Islam Avnue, Banglamotor, Dhaka-1000
Email: didarulislam@gmail.com;
Tel. +880 2 9669004
Website: www.xebecbd.com;
Area of focus: Building Management Systems (BMS)

Automation Specialist

Texmate Engineering Ltd.
House-1/6-B
Tolarbagh,Mirpur-1
Dhaka=1216
Bangladesh
Email: texmate_bd@yahoo.com
Tel. +88-02-9021824
Tel. 01713027717
Tel. 01712096121
Tel. 01720195888
Website: www.texmate-bd.com
Area of focus: VSD, SEN, PLC

Energy Efficiency Specialist

System Engineering
House -1
Road -3, Sector -1
Uttara
Dhaka – 1230
Bangladesh
Email: jafar@selbn.com
Email: mahbub@selbn.com
Tel. +88-02-8931497
Tel. +88028963000
Website: www.selbn.com
Area of focus: Remote Energy Management

LCA Specialist

System Engineering
House -1
Road -3, Sector -1
Uttara
Dhaka – 1230
Bangladesh
Email:  jafar@selbn.com
Email: mahbub@selbn.com
Tel. +88-02-8931497
Tel. +88028963000
Website: www.selbn.com
Area of focus: Lighting Control & Automation

Regional Distributor – Chittagong

Mark Engineering Ltd.
House – 87/B, Plot – 35/B
Block- E, Road – 2
Panchlaish R/A
Chittagong – 4000
Bangladesh
Email: info@markengineeringbd.com
Tel. +88-031-2557716
Tel. +88-031-2556944
Area of focus: Wiring devices, MCCB,
Final Distribution Component – MCB, SPD, etc.

GREN Automation Solution
Finlay House (Ground Floor)
11Agrabad C/A, Chittagong- 4100
Email: mahfuz.rahman@unb.ca
Tel. +88-031- 2520005
Tel. +88-031- 2712371
Tel. 01749078255
Area of focus: FD, CTR, MCCB (EZC & NS), ACB, VCB

 

 

 

http://bd.schneider-electric.com/en/

________________________________________________

hyundai_2014

http://www.hyundai-elec.com/index_en.jsp

pelna_gama

http://hyundai-elec.pl/en/page/changelang?lang=ENGLISH

http://zenex.pl/katalogi/hyundai/version_en/wylaczniki_powietrzne_u-acb_ver.en.pdf

http://www.riken.com.tw/Archive/_eng/RAB-A36.jpg

http://www.gersan.com.tr/uploads/image/GS%20BUSBAR.png

https://www.doruk.net.tr/assets/img/veri-merkezi.jpg

http://www.nprsolutions.in/

Quick Contact

Please send your query on following email ,Our support team will  get back to you shortly with answer.

Corporate Office-

Phone : 91-120-4292730

Address : T1-505 SG AlphaTower,, Sec-09 Vashundhra, Ghaziabad (U.P) INDIA Pin-201012

Email : info@nprsolutions.in

 

BUSBAR CHINA

56ff05bc-8cd0-4f67-a3f2-5b9e8848e55c

东莞市正丰电气母线槽公司

全国统一服务热线:4008-777-581

热线电话:0769-82251558

传真:0769-82251555

Q Q:1371672045

E-mail:dgzenfon@163.com

网址:www.dgzenfon.com

Bus bar malaysia

http://multib.com.my/

 

You are here:Home » Contact

Email
sales@multib.com.my

Telephone Number
+603-6028 1818

Fax
+603-6028 4899

Contact Person
Mr Chong Wah Hong

Website
www.multib.com.my

Address
Lot 53, Jalan Jasmine 2, Bandar Bukit Beruntung, 48300 Serendah, Selangor Darul Ehsan.

 

 

© Copyright 2015 MULTI-B SDN BHD ~ Manufacturer for Busduct, Busbar Trunking System | Managed by Krishna

http://www.dbts-ind.com/products-lv.html

http://lectron.ec/pdfs_catalogos/002.pdf

View DBTS Industries Sdn Bhd in a larger map
DBTS INDUSTRIES SDN BHD

Lot 2199, Jalan Nuri, Kg. Batu 9, Kebun Baru, 42500,
Telok Panglima Garang, Selangor Darul Ehsan, Malaysia

Tel :+603-3122 2008 / +603-3122 8676

Fax :+603-3122 2307

E-mail : enquiry@dbts-ind.com / dbtsind@gmail.com
Website : www.dbts-ind.com

 

 

 

 

swift-three-phase-transformer-oil-filled-distribution-transformer1

Nepal Ekarat Engineering Co. (P) Ltd.
Jaycess Marg,Thapathali
Kathmandu, Nepal, PO Box 1939,
Phone: 4243436, 4244857
Fax: +977-1-4253612
Email: info@neek-transformer.com

http://www.neek-transformer.com/docs/pdf/neek_2014.pdf

 

An enterprise of
Bangladesh Steel & Engineering Corporation
company_name

Telephone: 88-031-2501160; 88-031-2501161. Fax: 88-031-2501162 E-mail: gemcobd@yahoo.com. Transformer. Distribution Transformer. 3 Phase 11/.415KV

ISO 9001-2008 Certified

North Patenga, Chittagong-4204, Bangladesh.
Telephone: 88-031-2501160; 88-031-2501161
Fax: 88-031-2501162 E-mail: gemcobd@yahoo.com

http://mampower.net/

 

Superior Centre
Address: 416/1, Tejgaon Industrial Area,
Dhaka-1208, Bangladesh.
Phone : +88 02 8891764-66
Fax: +88 02 8891675
E-mail: sbel@agni.com

Chittagong Branch Office:

“ANCHOR”
House# 15(3rd floor),
Road#1, Block#H
Halishohor H/A, Chittagong

 

S A Traders and Co.

Head Office : 
121, Motijheel C/A (2nd Floor), Dhaka-1000
Tel : +880-2-9558340, +880-2-9565492, +880-2-7171689, 06662607106
Fax: +880-2-9565726
E-mail : satcobd@gmail.com, satco@msnbd.net
Website: http://www.satcogroupbd.com

Chittagong Office & Showroom : 
Kader Tower (1st & 3rd Floor), 128/2, Jubilee Road, (Tinpoller Matha), Chittagon-4000
Tel : +880-31-619374, +880-31-06663040196

Dhaka Showroom : 
Satco Electric, 110, BCC Road, Noorjahan Electric Market, Nawabpur, Dhaka-1100
Tel : +880-2-7123233, +880-2-7174110, Cell : 01711-3911789

 

http://www.venturegrp.net/evl.php

Address 

Mumtaz Plaza (5th Floor),
House No: 7, Road No: 4,
Dhanmondi R/A, Dhaka–1205, Bangladesh .

Telephone No : 880-2-8615888, 8619045 and 8615625.
Fax No : 880-2-8618054.
E-Mail :

Factory :

Natun Nagar, Savar, Dhaka , Bangladesh .

 

 

http://www.betelco.com/Company_Profile.html

betelco-power

batelco

 

ts_logo1

http://www.tstransformers.com/contact.html

TS TR
ANSFORMERS LIMITED
PT. TS TRANSFORMER INDONESIA
Head Office (Bangladesh)
Head Office (Indonesia)
Level # 13B, House # 21
JL. Anggrek Rasliana VII/63
Road # 17, Banani C/A
Slipi-Jakarta Barat
Dhaka – 1213, Bangladesh
Jakarta, Indonesia
Tel : +88 02 989 2590, 886 0793-4
Tel : +62 21 536 522 04
Fax : +88 02 882 8502, 988 2462
Fax : +62 21 536 522 04
E-mail : infotransformer@tstransformers.com    infoctpt@tstransformers.com

 

 

Confidence Electric Limited

OFFICE ADDRESS:

UNIQUE TRADE CENTRE, LEVEL 7, 8 PANTHOPATH, KARWAN BAZAR, DHAKA – 1215, BANGLADESH.

TEL: 02 – 9102543, 9102618, 9102847, 9102862;

FAX: 0088-02-9104584

 

 

 

http://www.tnsbd.com/contact_us.php

Head Office : Plot : 159, Road : 12/1, Suit : 1-B, Block : G, South Banasree, Dhaka-1219 , Bangladesh. Email : info@tnsbd.com , Tel : +88 02 7811848, Cell : +88 01613 215 051-67,+88 01613 215 069-76.
Chittagong Office: 42 M.M Ali Road, Haque View Market (Ground Floor),Lalkhan Bazar (WASA Circle) Chittagong. Email : ctg@tnsbd.com , Tel : 0316 33866, Cell : +88 01613 215 055
Webmail: info@tnsbd.com
Facebook : www.facebook.com/tnsengineering
Twitter : https://www.twitter.com/tnsbd
Customer care 24 x 7 :

 

Factory :

+88 01613 215 060,+88 01613 215 066, +88 01613 215 072

 

Hemayetpur, Savar, Dhaka, Bangladesh.

 

 

 

http://www.shaktibd.com/contact.html

E-mail:
info@shaktibd.com

Head Office:
Progoti Tower (1st Floor), Kha-214/E, Progoti Soroni, Merul Badda,
Gulshan-1, Dhaka-1212, Bangladesh
Tel: (880-2) 984-9029, 984-1870, 986-1135, 882-9029
Cell: +880-18-4103- 4467, +880-18-4111-7905

Fax: (880-2)986-1128


Manufacturing Plant:
Kudabo, Merer Bazar, Pubail, Gazipur, Bangladesh.
Tel: +880-18-1141 231

 

 

http://www.gurababd.com/profile.html

Hot line
Cell : +88 01670 886738 01971487222
Phone : +88 02 8081195, 8081196
M

anaging Director

: Engr. Mahabur Rahman
Cell : +88 01670886738
E-mail : mahabur.rahman@gurababd.com
Director ( Technical ) : Engr. Ariful Rahman Sarker
Cell : +88 01678 136679
E-mail : arifur.rahman@gurababd.com
Director (Marketing & Sales) : Engr. Safiqul Islam
Cell: +88 01713 045192
E-mail : safiqul.islam@gurababd.com
Year of Establishment : 2002
Primary Business Type : Manufacturers and Trading business
Estimated Annual Sales (BDT) : Below. 10 Core
Number of Employees : Below 4070

 

http://www.etbgroup.net/Contact.aspx

Contact Us
We have a 24 hour customer service and a user-friendly web site: www.etbgroup.net to make reaching us easy. Please feel free to contact any of our staff should a need arise. May, we thank you for your patronage in the past, and look forward to serving you again, in the future.

Company Address

Corporate Office:
House-08, Road-04, Sector-10, Uttara, Dhaka-1230.
Phone: 02-8931719, 02-8931532
Client Service: 01822-828541
E-mail : info@etbgroup.net
Website : www.etbgroup.net

Factory:
1 no. Uttar Vadam, Tongi, Gazipur, Bangladesh.
Contact: 01822828540

Sylhet Office:
Shuvechha- 4, Sunamgonj Road, Amberkhana, Sylhet.
Contact: 01822828534

Energy System Company

Corporate Office :

63 / 1 , Siddeshawri ( 2nd Floor) ,

New Circular Road , Mouchak , Dhaka-1217,

Bangladesh.

Tel: +88 02 9359065 ,

cell: +88 01713 40 27 44

E-mail : info@ensyscobd.com

 

 

Hashem Electric Co. Ltd. (HEC)

http://www.hecbd.com/contact.php

Contact information

Address:
House no. 60/B, Road no. 130, Gulshan-1.Dhaka-1212


Factory Address:
Pagar, Tongi, Gazipur, Bangladesh


Phone number:
Phone number:(8802) 8831102 Fax: (8802) 8834077


E-mail:
E-mail: hec@hecbd.com


We are open:
Everyday 9 AM – 6 PM

 

IMG_20150812_171833_v_1439382602Star Connection for three-phase motors

How to change the Rotation Direction and Wire Configuration – Star or Delta – of Electric Motors

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The direction of rotation of an electric motor can be changed anytime and easily at the motor terminals. In three-phase motors, the winding configuration can easily be changed from a star or Y connection to a delta or mesh connection at the motor terminal box.
Three-phase Electric Motors
The windings of AC motors can either be connected in star(Y)-connection or in delta(Δ)-connection.The standard that deals with this winding connection and designated marking of the terminal box is IEC 60034-8. According to this standard, the phases of motor windings are defined by W, U, V
Star or Y Connection
For a motor with terminal markings as W1, U1, V1 and W2, U2, V2 respectively, proceed as follows:
Short-circuit the terminals W2, U2 and V2 and connect the mains to the W1, U1 and V1 to get a star(Y)-connection. See diagram below:

Delta(Δ) Connection
When connecting the end of a phase to the start of another phase you get a delta(Δ)-connection. Connect W2 to U1, U2 to V2, V1 to W1 as shown below:

How to Change the Rotation of a Three-phase Electric Motor
The direction of rotation for the motor shaft of an AC motor is defined in IEC 60034-8 as either CW (clockwise) or CCW (counter-clockwise), when looking into the motor shaft. The direction of rotation of a three-phase AC motor can be changed at the terminal box. This is done by interchanging two of the line cables, e.g switch L1 and L2.
When dealing with a single-phase motor, YOU MUST ALWAYS CHECK the wiring diagram from the manufacturer’s manual to get direction on how to change the direction of rotation of the motor.

 

Delta Connection for three-phase motorsDelta-Connection

02206

 

 

How To Test and Check Single phase Electric Motors

 Single Phase Motor Windings
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There are several types of single phase motors. What is however common to them all is that they have a Start Winding, a Run Winding, and a Common connection between them as shown below:
Testing of single phase motors is pretty easy if certain basic steps are followed. The objective of any AC motor test is to determine the health status of the motor. The basic steps in ascertaining the health of any motor are given below
(a) General Inspections
(b) Earth Continuity and Resistance Test
(c) Power Supply Test
(d) AC Motor Winding Resistance Test
(e) Insulation Resistance Test
(f) Running Amps Test
General Inspections
For the single phase motor, do the following:

(1) Check the appearance of the motor. Check for burnt, damage to body or cooling fan or shaft.
(2) Manually rotate motor shaft to examine bearing condition. Look out for smooth and free shaft rotation. If shaft rotation is free and smooth, bearing is possibly in good condition, otherwise consider replacing.
(3) As with all testing and inspections, the motor name plate provides valuable information that will help to ascertain the true health of the motor. Examine the name plate thoroughly.

Earth Continuity and Resistance Test
With a multimeter, measure the resistance between motor frame (body) and earth. A good motor should read less than 0.5 ohms. Any value greater 0.5 ohms indicate trouble with the motor.

Power Supply Test
For single phase motors, the expected voltage is about 230V or 208V depending whether you are using the UK or America voltage system. Check that the correct voltage is applied to the motor.

AC Motor Winding Resistance Test
Check the motor winding resistance or ohms reading with a multimeter. Since there are three terminals – S, C, R –in a single phase motor, measure winding resistance:
C to S, C to R and S to R. Measured Value S to R should be = C to S + C to R
As a rule to single phase motors, the following applies:
(1) Ohms reading between S and R should give the maximum reading of resistance
(2) Ohms reading between C and R should give the lowest reading of resistance
(3) Ohms reading between C and S should give some intermediate value between that for S to R and C to R
Any deviation signifies a possibly bad electric motor or a motor that requires repairs.

Insulation Resistance Test
Insulation resistance failure of an electric motor is one of the first signs that the motor is about to fail. Insulation resistance is usually measured between motor windings and earth using an insulation tester or megometer. Set the voltage setting of the insulation resistance tester to 500V and check motor windings to earth. Check C to E, S to E, R to E. Minimum test value for a good electric motor is at least 1MΩ

Running Amps Test
With the motor running, check the full load amps (FLA) with a suitable meter or preferably a clamp on meter and compare with the motor name plate FLA. Deviations from rated FLA could signify problems with the motor under test.

 

 

How To Test Three – Phase AC Motors

The basic steps in ascertaining the health of a three-phase AC motor are given below:
(a) General Inspections
(b) Earth Continuity and Resistance Test
(c) Power Supply Test
(d) AC Motor Winding Continuity Test
(e) AC Motor Winding Resistance Test
(f) Insulation Resistance Test
(g) Running Amps Test

General Inspections
For the three-phase motor, do the following:

(1) Check the appearance of the motor. Check for burnt, damage to body or cooling fan or shaft.
(2) Manually rotate motor shaft to examine bearing condition. Look out for smooth and free shaft rotation. If shaft rotation is free and smooth, bearing is possibly in good condition, otherwise consider replacing, repair or carry out further diagnosis.
(3) As with all testing and inspections, the motor name plate provides valuable information that will help to ascertain the true health of the motor. Examine the name plate thoroughly and compare values of running amps test (see below) with name plate value

Earth Continuity and Resistance Test
With a multimeter, measure the resistance between motor frame (body) and earth. A good motor should read less than 0.5 ohms. Any value greater 0.5 ohms indicate trouble with the motor. Further troubleshooting maybe required

Power Supply Test
For three phase motors, the expected voltage for a 230/400V system is 230V phase to neutral and 400V between each of the three phase supply lines. Check that the correct voltage is applied to the motor using a multimeter.  Ensure the terminal for power supply is in good condition. Check the connection bar for terminal (U, V, and W). For three phase motors, connection type is either Star (Y) or Delta

AC Motor Winding Continuity Test
Using a multimeter, check the continuity of motor winding from phase to phase ( U to V, V to W , W to U ).Each phase to phase must have a continuity if winding is OK. If any particular phase fails the continuity test, your motor is probably burnt.
Please see how to identify three phase windings for proper winding identification. U, V, W is a European winding designation.

AC Motor Winding Resistance Test
Check the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal ( U to V,V to W ,W to U ).The ohms reading for each winding must be the same (or nearly the same). Remember that the three phases have identical windings or nearly so!

Insulation Resistance Test
Insulation resistance failure of an electric motor is one of the first signs that the motor is about to fail. For a three phase motor, insulation resistance is usually measured between each motor winding or phase and between each motor phase and motor frame (earth) using an insulation tester or megger. Set the voltage setting of the insulation resistance tester to 500V.  Check from phase to phase (U to V, V to W, W to U). Check from phase to motor frame (earth) (U to E, V to E , W to E ). Minimum test value of motor insulation resistance is 1 Meg Ohm (1 MΩ). See how to measure insulation resistance of Electric Motor

Running Amps Test
With the motor running, check the full load amps (FLA) with a suitable meter or preferably a clamp on meter and compare with the name plate FLA. Deviations from rated FLA could signify problems with the motor under test.

 

imagesstar-delta-connection-13862720

 

STAR DELTA connection Diagram and Working principle

 

 

 

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  • STAR DELTA connection Diagram and Working principle
  • image01
  •  Descriptions: A Dual starter connects the motor terminals directly to the power supply. Hence, the motor is subjected to the full voltage of the power supply. Consequently, high starting current flows through the motor. This type of starting is suitable for small motors below 5 hp (3.75 kW).Supply reliability and reserve power generation dictates the use of reduced voltage or not to reduce the starting current of an induction motor the voltage across the motor need to be reduced. This can be done by 1. Autotransformer starter, 2.Star-delta starter or 3. Resistor starter. Now-a-days VVVF drive used extensively for speed control serves this purpose also.
    In dual starter the motor is directly fed from the line and in star delta starter then motor is started initially from star and later during running from delta. This is a starting method that reduces the starting current and starting torque. The Motor must be delta connected during a normal run, in order to be able to use this starting method.
    More: Star/Delta starters are probably the most common reduced voltage starters in the 50Hz world. (Known as Wye/Delta starters in the 60Hz world). They are used in an attempt to reduce the start current applied to the motor during start as a means of reducing the disturbances and interference on the electrical supply.How it works?In operation, the Main Contactor (KM3) and the Star Contactor (KM1) are closed initially, and then after a period of time, the star contactor is opened, and then the delta contactor (KM2) is closed. The control of the contactors is by thetimer (K1T) built into the starter. The Star and Delta are electrically interlocked and preferably mechanically interlocked as well. In effect, there are four states:
  • There are two contactors that are close during run, often referred to as the main contactor and the delta contactor. These are AC3 rated at 58% of the current rating of the motor. The third contactor is the star contactor and that only carries star current while the motor is connected in star. The current in star is one third of the current in delta, so this contactor can be AC3 rated at one third of the motor rating.
  • Component: The Star/Delta starter is manufactured from three contactors, a timer and a thermal overload. The contactors are smaller than the single contactor used in a Direct on Line starter as they are controlling winding currents only. The currents through the winding are 1√3 = 0.58 (58%) of the current in the line. this connection amounts to approximately 30% of the delta values. The starting current is reduced to one third of the direct starting current.
  • The received starting current is about 30 % of the starting current during direct on line start and the starting torque is reduced to about 25 % of the torque available at a D.O.L start.
  • Reduced-voltage starters are employed with motors above 5 hp. Although Dual motor starters are available for motors less than 150kW on 400 V and for motors less than 1 MW on 6.6 kV.
  • OFF State. All Contactors are open
  • Star State. The Main and the Star contactors are closed and the delta contactor is open. The motor is connected in star and will produce one third of DOL torque at one third of DOL current.
  • Open State. The Main contactor is closed and the Delta and Star contactors are open. There is voltage on one end of the motor windings, but the other end is open so no current can flow. The motor has a spinning rotor and behaves like a generator.
  • Delta State. The Main and the Delta contactors are closed. The Star contactor is open. The motor is connected to full line voltage and full power and torque are available.

This type of operation is called open transition switching because there is an open state between the star state and the delta state.

 

 

 

Forward / Reverse start of 3-phase AC motor

Forward / Reverse start of 3-phase AC motor

he speed of a three-phase AC electric motor is defined in rotations per minute (rpm). For example, if the motor’s declared speed is 1500 rpm, that means that when the motor is running in the stacionary mode of operation it has 1500 rotations per minute in a given direction. The direction of the rotation of the motor can be clockwise or vice versa. If we send three phases R, S and T on the poles of the motor, then the motor will be running in one given direction. To change the direction of rotation of the motor we need to change two phases of the motor. So, if the voltage poles of the motor are A, B, and C, and if we provide phase R to pole A, phase S to pole B and phase T to pole C, than the rotation of the motor will be in one given direction, which we call forward direction of rotation (for example, clockwise direction). Now, if we change (switch) any two phases of the motor, we will change the direction of the rotation. If we provide phase R to pole C, phase S to pole B and phase T to pole A (switch the phases of poles A and C), the rotation of the motor will be opposite from the previous. For this purpose, we need two contactors. The connection of the energy contacts of the contactors is shown on Picture 1.

Picture 1: Forward / Reverse connection of 3-phase AC motor


The schematic of this energy circuit is classic. All three phases R, S and T are protected with fuses e1, e2 and e3. Usualy, these fuses are slow, and the nominal current for which they break off the circuit is chosen according to the nominal current of the motor for the given supply voltage. After fuses, the phases are send through the proper connection of the energy contacts of contactors c1 and c2, which will provide forward/reverse rotation of the motor. In this circuit, the motor is also protected with overcurrent protection e4 (thermal overload relay or motor starter protector). The energy contacts of the contactors, 1-2, 3-4 and 5-6 are normally open, and if the voltage is provided on the contactors coils (a-b), the energy contacts are closed and the current is passing through them. In order to achieve a forward/reverse rotation of the motor, the energy contacts are connected as follow: when contactor c1 is ON and c2 is OFF, the phase R is sent to the first pole of the motor through the energy contact 2-1 of the contactor c1, the phase S is sent to the second pole of the motor through contact 4-3, and the phase T is sent through the contact 6-5 to the third pole of the motor. In this case, the motor is running in forward rotation. When contactor c1 is OFF and c2 is ON, the phases R and T switched their places, so now, phase R is sent to the third pole of the motor through the contact 2-1 of the contactor c2, the phase S is sent to the second pole through the contact 4-3 (remains the same), and the phase T is sent to the first pole through the contact 6-5. So, in this case, we have switched the first and third phase on the motor, thus the motor is running in reverse rotation. Here is good to mention that contactors c1 and c2 need to operate in some kind of blockade mode, which means when the contactor c1 is ON, the c2 must be OFF, and vice versa, when the c2 is ON, the c1 must be OFF. This way, we prevent the short-circuiting of two phases. The control circuit for this energy system can be implemented in different ways. On Picture 2 is shown one configuration of the control circuit.

.The control circuit is very simple and it provides basic functionality and protection for the forward/reverse connection of 3-phase AC motor. First, the fuse e5 provides over-current protection of the control circuit. Here, the control circuit has working voltage of 230 V AC (50 Hz), which means that the contactor coils are 230 V AC operated. In case of use of the DC voltage operating contactors (for example, contactor with 24 V DC coil voltage), the control circuit should remains the same, but the only change will be power supply voltage for the circuit (instead of phase R there will be + 24 V DC voltage, and instead of null N there will be 0 V DC or ground). Depending on power supply voltage (current) for operating with contactor coils, the proper fuse e5 should be chosen. After fuse e5, the control signal is passed through the NC contact from the motor overcurrent protection e4. This contact is closed when the protection relay is off, which means that the current that motor consumes is not above the maximum. If the motor start to consume current which is greater than its nominal current and it is above the value that is set on the motor protector, then the protection relay is activated, and the contact e4 in control circuit will be open. Thus, the control circuit will be interrupted, so, the motor is out of power and it is protected from over-current. After the contact from protection e4, the control signal is passed through the switch b1. This switch is for starting the motor. Actually, the motor can be started with one of the key switches b2 or b3, but first, the switch b1 must be in position I (ON). The rest of the control circuit, is the most interesting and important part. The coils of the contactors c1 and c2 are combined with their NO/NC contacts and key switches b2 and b3 in the way that motor can be run only in forward or only in reverse direction of rotation. In this part of the control circuit is implemented the bockade between the contactors c1 and c2. The first line of this circuit provides operating voltage to the coil of the contactor c1 (a-b). The line starts with parallel connection of the key switch b2 and the normally open contact of c1 (13-14). Then the line continues with the normally closed contact of the contactor c2 (11-12) and ends with the coil of the contactor c1. The second line provides operating voltage to the coil of the contactor c2 (a-b). This line starts with parallel connection of the key switch b3 and the normally open contact of c2 (13-14). Then the line continues with the normally closed contact of the contactor c1 (11-12) and ends with the coil of the contactor c2.

Now let’s see how this control circuit works. The protection relay is set to a given maximum current for the motor and the contact is closed, so, the control voltage is provided to the switch b1, which is in position 0 (off). If we turn on the switch (position I), we provide the control voltage to the parallel lines with coils of c1 and c2, which are both off at this moment. Now, we can start the motor in forward or in reverse direction of rotation. To start the motor in forward direction we should press the key switch b2. For this short time interval when b2 is pressed, the voltage is provided to the coil of c1, the c1 is turn on, and it will remains on through its own NO contact (13-14), which is now closed because c1 is ON. Now, if we want to change the direction of the motor from forward to reverse, before pressing the key switch b3 we should turn off the motor with turning the switch b1 into position 0, and then put back in position I. Otherwise, if we don’t do Off -> On operation with switch b1 first, then pressing the key switch b3 during the motor is running in forward direction of rotation will change nothing in energy circuit, because the contactor c2 is blocked with the NC contact (11-12) from the contactor c1, which in this case is open because c1 is ON. The same principle of operation applies in the opposite situation when the motor is running in reverse direction.

Finally, the only bad thing about this control circuit is that every time when we want to change the direction of rotation of the motor we must first turn it off, and then turn it on again and start with the proper direction. This can be solved with adding the extra logic in the control circuit, but that is another discussion. Here, the point was to implement correct system for forward/reverse start of 3-phase AC motor, which will be functional and simple. Of course, things can always be improved.

 

How a transformer works

  1. What is transformer? Definition & Working Principle of Transformer.

Definition of Transformer

Electrical power transformer is a static device which transforms electrical energy from one circuit to another without any direct electrical connection and with the help of mutual induction between two windings. It transforms power from one circuit to another without changing its frequency but may be in different voltage level.
This is a very short and simple definition of transformer, as we will go through this portion of tutorial related to electrical power transformer, we will understand more clearly and deeply “what is transformer ?” and basic theory of transformer.

Working Principle of Transformer

 The working principle of transformer is very simple. It depends upon Faraday’s law of electromagnetic induction. Actually, mutual induction between two or more winding is responsible for transformation action in an electrical transformer.

Faraday’s Laws of Electromagnetic Induction

  According to these Faraday’s laws,
“Rate of change of flux linkage with respect to time is directly proportional to the induced EMF in a conductor or coil”.

Basic Theory of Transformer

 Say you have one winding which is supplied by an alternating electrical source. The alternating current through the winding produces a continually changing flux or alternating flux that surrounds the winding. If any other winding is brought nearer to the previous one, obviously some portion of this flux will link with the second. As this flux is continually changing in its amplitude and direction, there must be a change in flux linkage in the second winding or coil. According to Faraday’s law of electromagnetic induction, there must be an EMF induced in the second. If the circuit of the later winding is closed, there must be an current flowing through it. This is the simplest form of electrical power transformer and this is the most basic of working principle of transformer.

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For better understanding, we are trying to repeat the above explanation in a more brief way here. Whenever we apply alternating current to an electric coil, there will be an alternating flux surrounding that coil. Now if we bring another coil near the first one, there will be an alternating flux linkage with that second coil. As the flux is alternating, there will be obviously a rate of change in flux linkage with respect to time in the second coil. Naturally emf will be induced in it as per Faraday’s law of electromagnetic induction. This is the most basic concept of the theory of transformer.
The winding which takes electrical power from the source, is generally known as primary winding of transformer. Here in our above example it is first winding

 The winding which gives the desired output voltage due to mutual induction in the transformer, is commonly known as secondary winding of transformer. Here in our example it is second winding.

The above mentioned form of transformer is theoretically possible but not practically, because in open air very tiny portion of the flux of the first winding will link with second; so the current that flows through the closed circuit of later, will be so small in amount that it will be difficult to measure.
The rate of change of flux linkage depends upon the amount of linked flux with the second winding. So, it is desired to be linked to almost all flux of primary winding to the secondary winding. This is effectively and efficiently done by placing one low reluctance path common to both of the winding. This low reluctance path is core of transformer, through which maximum number of flux produced by the primary is passed through and linked with the secondary winding. This is the most basic theory of transformer.

Main Constructional Parts of Transformer

 The three main parts of a transformer are,

  1. Primary Winding of transformer – which produces magnetic flux when it is connected to electrical source.
  2. Magnetic Core of transformer – the magnetic flux produced by the primary winding, that will pass through this low reluctance path linked with secondary winding and create a closed magnetic circuit.
  3. Secondary Winding of transformer – the flux, produced by primary winding, passes through the core, will link with the secondary winding. This winding also wounds on the same core and gives the desired output of the transformer

 

Electrical Power Transformer & Definition and Types of Transformer

Definition of Transformer

  A transformer is a static machine used for transforming power from one circuit to another without changing frequency. This is a very basic definition of transformer

 

History of Transformer

 The history of transformer was commenced in the year 1880. In the year 1950, 400KV electrical power transformer was introduced in high voltageelectrical power system. In the early 1970s, unit rating as large as 1100MVA was produced and 800KV and even higher KV class transformers were manufactured in year of 1980.

Use of Power Transformer

 Generation of electrical power in low voltage level is very much cost effective. Hence electrical power is generated in low voltage level. Theoretically, this low voltage level power can be transmitted to the receiving end. But if the voltage level of a power is increased, the current of the power is reduced which causes reduction in ohmic or I2R losses in the system, reduction in cross sectional area of the conductor i.e. reduction in capital cost of the system and it also improves the voltage regulation of the system. Because of these, low level power must be stepped up for efficient electrical power transmission. This is done by step up transformer at the sending side of the power system network. As this high voltage power may not be distributed to the consumers directly, this must be stepped down to the desired level at the receiving end with the help of step down transformer. These are the uses of electrical power transformer in the electrical power system.

 Two winding transformers are generally used where ratio between high voltage and low voltage is greater than 2. It is cost effective to use auto transformer where the ratio between high voltage and low voltage is less than 2. Again three phase single unit transformer is more cost effective than a bank of three single phase transformer unit in a three phase system. But still it is preferable to use than the later where power dealing is very large since such large size of three phase single unit power transformer may not be easily transported from manufacturer’s place to work site.

Types of Transformer

 Transformers can be categorized in different ways, depending upon their purpose, use, construction etc. The types of transformer are as follows,

1:  Step Up Transformer & Step Down Transformer – Generally used for stepping up and down the voltage level of power in transmission and distribution power network.

  1. 2: Three Phase Transformer & Single Phase Transformer – Former is generally used in three phase power system as it is cost effective than later but when size matters, it is preferable to use bank of three single phase transformer as it is easier to transport three single phase unit separately than one single three phase unit.

    3:  Electrical Power Transformer, Distribution Transformer & Instrument Transformer – Transformer is generally used in transmission network which is normally known as power transformer, distribution transformer is used in distribution network and this is lower rating transformer and current transformer & potential transformer, we use for relay and protection purpose in electrical power system and in different instruments in industries are called instrument transformer.

     4: Two Winding Transformer & Auto Transformer – Former is generally used where ratio between high voltage and low voltage is greater than 2. It is cost effective to use later where the ratio between high voltage and low voltage is less than 2.

    4: Outdoor Transformer & Indoor Transformer – Transformers that are designed for installing at outdoor are outdoor transformers and transformers designed for installing at indoor are indoor transformers.

 

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Electrica Cad Softwear

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http://www.cadprofi.com/main/en/products/cadprofi/cadprofi-electrical

http://www.cadprofi.com/main/en/support/download/manufacturer-catalogs

 

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