Bayt.com

Communiquez avec les autres et partagez vos connaissances professionnelles

Inscrivez-vous ou connectez-vous pour rejoindre votre communauté professionnelle.

Suivre

Why you add contactors in PLC controlled system while PLC has built-in contactors?

Mechatronics Electrical Controls
user-image
Question ajoutée par محمود الطيب
Date de publication: 2014/04/26
Apprécier (1) Vues (10) Suiveurs (1) Réponses (5) Report Question
Ajoutez Une Réponse
Inscrivez-vous ou connectez-vous pour répondre.
Danyal Shahzad
par Danyal Shahzad , Maintenance Executive , Tapal Tea (Pvt) Ltd

main reason is to isolate PLC

Ali Hassan Ali Osman
par Ali Hassan Ali Osman , Production and Maintenance Manager , Loviseberg Presseri AB

Plc has contactors with low load thats why we isolate the output by external contactors to protect the plcs contact and increase its lifetime. Also in case of running3 phase motors we will only need a single signal from one relay (contactor) to activate that external contactor for that motor.

Md. Noman Ahammed

to run a three phase (high rated) load we must need a3 phase cotactor which can be powered by PLC. single phase low power rated load may be directly powered by PLC.

Ahmed Alam Khan Bangash
par Ahmed Alam Khan Bangash , Senior Manager Electrical & Instrumentation, Reliability Centered Maintenance at (Cement and Power) , MAPLE LEAF CEMENT FACTORY AND POWER PLANT

PLC contact are of very low rating thatswhy external contactor are used, which could be of very high ratings. 

sohail zaman
par sohail zaman , Engineer - Instrumentation and Automation , National Petroleum Services Co.

there is no contactors in PLC .

Ecrivez Votre Réponse
More Questions Like This

Avez-vous besoin d'aide pour créer un CV ayant les mots-clés recherchés par les employeurs?

Obtenir de l'aide