Example of emergency power system wiring

Synchronous motors and induction motors (also known as asynchronous motors) are two common types of AC motors, which have their own characteristics and are suitable for different application scenarios. The following are detailed descriptions of the most suitable application areas for synchronous and induction motors:Synchronous motorPeculiarity Constant speed: When the synchronous motor is operating under rated load, its speed is proportional to the frequency of the grid, so it can maintain a co

Harmonics in electrical systems are caused by nonlinear loads that produce non-sinusoidal waveforms of current or voltage in alternating current systems. Harmonics are sine wave components with integral multiples of frequencies other than fundamental frequencies. The following are some of the main causes of harmonics in electrical systems:Nonlinear loadNonlinear loads are those in which the current is not linearly related to the voltage. This type of load is common in the power system, and the m

Lighting distribution system wiring diagram （Emergency lighting power supply and High-rise building)When the building is a Class A high-rise building, the two power supplies are the main power supply and the emergency power supply. When it is a class II high-rise building, it is appropriate to supply power with double circuits. The emergency lighting distribution box should be set according to the fire protection zone

The Voltage Drop allowed in a circuit is the reduction in voltage due to the presence of resistance when a current passes through a wire or circuit element. The size of the voltage drop depends on the specific application and design criteria of the circuit. Different applications and national standards have different regulations on the allowable voltage drop. Below are some common voltage drop requirements:Home and commercial buildingsIn the electrical wiring of homes and commercial buildings, i

Lighting distribution system wiring diagram （Low-voltage power supply and Multi-storey building）Use trunk type supply, the main distribution box installed in the bottom

Pure inductance circuit and pure resistance circuit are two basic circuit models, which respectively represent the ideal case of only inductance or only resistance components in the circuit. The following describes the two circuit models and their characteristics:Pure Resistor CircuitDefinitionA pure resistance circuit is a circuit that contains only resistance components (R) and no other types of components (such as inductors L or capacitors C). Resistance elements are used to represent the par

Lighting distribution system wiring diagram powered by an external lineEmergency lighting is cross-powered by two main lines

Lighting distribution system wiring diagram with two transformer and two trunk

Applications in power systemsResidential area power supplyIn residential areas, the voltage introduced from the high-voltage distribution network (such as 10kV) needs to be reduced by the transformer before it can be supplied to residents. The low-voltage transformer will reduce the 10kV voltage to 380V/220V three-phase four-wire low-voltage electricity to meet the electricity demand of home lighting, electrical equipment (such as TV, refrigerator, air conditioning, etc.). This low-voltage power