Electricity supply categories
SES are assembled sources and all systems for changing, redistributing and transmitting electric power. But there are requirements to such systems:
- Reliability;
- Continuity of current supply;
- Security of service of all components of SES;
- Standardization;
- Energy saving, energy efficiency;
- Safety for the environment;
- Ergonomics;
All power supply systems are divided into different characteristics. Classify by:
- Type of energy origin;
- Location;
- Nature and current frequency;
- Neutral organizations;
- Security of supply;
- Intended use;
- Mobility;
- Accessories for the main user.
The SES form is a schematic position of the input sources of energy, distribution, transmission, transformation.
Power supply categories for reliability
Power supply categories are divided into three types, according to electric receivers that are directly involved in receiving energy. So, the category 1 electric receiver is such receivers, as a result of which a break may have serious consequences: material damage, a threat to life, disruptions in the work of communications, damage to expensive equipment, etc.2 category - with the break of which there is a failure of machines, mechanisms, apparatus, the vital activity of the population, the shipment of goods, the idle time of equipment and workers. By category 3, all other electricians.
Each system has its own protection against various contingency situations. This protection is relay. There are three main modes of operation of the SES:
- Normal: Provides trouble-free access to energy users, in the right amount and the appropriate quality.
- . Emergency: knocks down the natural mode and lasts until the damaged element is turned off. Emergency mode only short-time
- Post-emergency: the mode after the accident lasts until the first mode of the
has been fully restored. It should be noted that the category of supplying the consumer's electricity can be changed if necessary. Well, of course, it all depends on the purpose of this object. For houses, the third category is assigned, and for the first or second production.
Power supply for the first category
For users of the 1st category of electricity supply security, it is necessary to implement power supply from 2 power sources. Power sources must be independent of each other. This is necessary to prevent and minimize the risks of accidents and emergency shutdowns. In the event of an accident at one source, electricity will be supplied from the second.
Allocate a special group among consumers of this category of security. Receivers of this special group are characterized by the fact that their work without interruptions is needed to stop production without an accident. Moreover, the supply of a special group must be from a third independent source( generator, batteries).In the absence of a power reserve, it is acceptable to use a smooth stop process.
It is worth remembering that a normal life support for any person is not easy to imagine without electricity. Uninterrupted supply of such resources is necessary for the work of everything that surrounds us and for control over buildings.
