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A small, early 1960s-vintage motor control center for 480 volt motors. A motor control center ( MCC ) is an assembly to control some or all electric motors in a central location. It consists of multiple enclosed sections having a common power bus and with each section containing a combination starter, which in turn consists of motor starter ...
Less commonly used colour codes voltage range >50 VDC (0 Hz) 125/250 VAC 277 V >50 VAC, 100–500 Hz 28 VDC common color white orange gray green - common application DC power 125/250 VAC split-phase (2P+N+E), Series II current ratings 277 V Series II current ratings single-phase AC power 115 V 400 Hz aircraft power [9] 28 VDC aircraft power
A color tool or other graphics software is often used to generate color values. In some uses, hexadecimal color codes are specified with notation using a leading number sign (#). [1] [2] A color is specified according to the intensity of its red, green and blue components, each represented by eight bits.
ASME BPVC Code Cases - Boilers and Pressure Vessels; ADDENDA. Addenda, which include additions and revisions to the individual Sections of the Code, are issued accordingly for a particular edition of the code up until the next edition. [9] Addenda is no longer in use since Code Edition 2013. It has been replaced by two years edition period ...
Mullard initially handled semiconductor naming by using the "O" heater code (shifting "Cold Cathode" to a code of "Z"). The second letter broadly indicated the type of device, roughly following the tube designation, without indicating the semiconductor material: A low-power semiconductor diode, e.g. OA7
The Roots blower is one example of a vacuum pump. A vacuum pump is a type of pump device that draws gas particles from a sealed volume in order to leave behind a partial vacuum. The first vacuum pump was invented in 1650 by Otto von Guericke, and was preceded by the suction pump, which dates to antiquity. [1]
Center-tapped delta transformer Center-tapped delta transformer voltages. High-leg delta service is supplied in one of two ways. One is by a three-phase transformer (or three single-phase transformers), having four wires coming out of the secondary, the three phases, plus a neutral connected as a center-tap on one of the windings.
An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...