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Section 1 General Rules
Power supply and electrical networks. Scope, definitions
Encyclopedia of radio electronics and electrical engineering / Rules for the installation of electrical installations (PUE)
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1.2.1. This chapter of the Rules applies to all power supply systems.
Power supply systems for underground, traction and other special installations, in addition to the requirements of this chapter, must also comply with the requirements of special rules.
1.2.2. Energy system (energy system) - a set of power plants, electrical and thermal networks, interconnected and connected by a common mode in the continuous process of production, conversion, transmission and distribution of electrical and thermal energy with the general management of this mode.
1.2.3. The electrical part of the power system is a set of electrical installations of power plants and electrical networks of the power system.
1.2.4. Electric power system - the electrical part of the power system and receivers of electrical energy powered by it, united by a common process of production, transmission, distribution and consumption of electrical energy.
1.2.5. Power supply - providing consumers with electrical energy.
Power supply system - a set of electrical installations designed to provide consumers with electrical energy.
Centralized power supply - power supply to consumers of electrical energy from the power system.
1.2.6. Electrical network - a set of electrical installations for the transmission and distribution of electrical energy, consisting of substations, switchgears, current conductors, overhead and cable power lines operating in a certain area.
1.2.7. Electrical energy receiver (electric receiver) - an apparatus, unit, etc., designed to convert electrical energy into another type of energy.
1.2.8. Consumer of electrical energy - an electrical receiver or a group of electrical receivers, united by a technological process and located in a certain territory.
1.2.9. The normal mode of the consumer of electrical energy is the mode in which the specified values of the parameters of its operation are provided.
Post-emergency mode - the mode in which the consumer of electrical energy is located as a result of a violation in the system of its power supply before the establishment of a normal mode after the localization of the failure.
1.2.10. An independent power source is a power source that maintains voltage in the post-accident mode within the regulated limits when it disappears on another or other power sources.
Independent power sources include two sections or busbar systems of one or two power plants and substations, while simultaneously meeting the following two conditions:
1) each of the sections or busbar systems in turn is powered by an independent power source;
2) bus sections (systems) are not interconnected or have a connection that is automatically disconnected when one of the bus sections (systems) malfunctions.
 See other articles Section Rules for the installation of electrical installations (PUE).
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