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ASHRAE's Handbook Committee maintains an Authors and Revisers Guide, which can be obtained freely via the Handbook portion of the ASHRAE Web site. While each new or revised chapter manuscript is to be reviewed for technical content by each TC voting and corresponding member before publication, there are often many other pre- and post ...
HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state.
IEEE 200-1975 or "Standard Reference Designations for Electrical and Electronics Parts and Equipments" is a standard that was used to define referencing naming systems for collections of electronic equipment. IEEE 200 was ratified in 1975. The IEEE renewed the standard in the 1990s, but withdrew it from active support shortly thereafter.
IEC 60255 Measuring relays and protection equipment; IEC 60258 Direct acting recording electrical measuring instruments and their accessories; IEC 60261 Sealing test for pressurized waveguide tubing and assemblies; IEC 60263 Scales and sizes for plotting frequency characteristics and polar diagrams; IEC 60264 Packaging of winding wires
A relay Electromechanical relay principle Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple ...
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