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AC contactor for pump application. A contactor is an electrically controlled switch used for switching an electrical power circuit. [1] A contactor is typically controlled by a circuit which has a much lower power level than the switched circuit, such as a 24-volt coil electromagnet controlling a 230-volt motor switch.
A large number of Indian Standard (IS) codes are available that are meant for virtually every aspect of civil engineering one can think of. During one's professional life one normally uses only a handful of them depending on the nature of work they are involved in. Civil engineers engaged in construction activities of large projects usually have to refer to a good number of IS codes as such ...
Division 41 — Material Processing and Handling Equipment; Division 42 — Process Heating, Cooling, and Drying Equipment; Division 43 — Process Gas and Liquid Handling, Purification and Storage Equipment; Division 44 — Pollution Control Equipment; Division 45 — Industry-Specific Manufacturing Equipment; Division 46 — Water and ...
The construction industry of India is an important indicator of the development as it creates investment opportunities across various related sectors. With a share of around 8.2%, the construction industry has contributed an estimated ₹670,778 crores ( US$ 131 billion) [ 1 ] to the national GDP at factor cost in 2011–12. [ 2 ]
Their product portfolio is divided into four main categories: agricultural equipment, construction equipment, road construction equipment, and earth-moving machinery, [7] mainly catering to Asia-Pacific, Africa and Latin America regions. [8] [9] In 2019, the company was ranked at #223 in Fortune magazine's "Next 500" list of midsized Indian ...
Centrifugal contactors are typical referred to by the diameter of their rotor. Thus, a 5-inch centrifugal contactor is one having a 5-inch diameter rotor. Annular centrifugal contactors are relatively low revolutions-per-minute (rpm), moderate gravity enhancing (100–2000 G) machines, and can therefore be powered by a direct drive, variable ...
The EPC contractor coordinates all design, procurement and construction work and ensures that the whole project is completed as required and in time. They may or may not undertake actual site work. EPC companies are often used in large-scale projects, such as power plants, refineries, chemical processing facilities, infrastructure projects, and ...
The National Association of Relay Manufacturers and its successor, the Relay and Switch Industry Association define 23 distinct forms of electrical contact found in relays and switches. [ 12 ] A normally closed ( NC ) contact pair is closed (in a conductive state) when it, or the device operating it, is in a deenergized state or relaxed state.