1. Power supply incoming cabinet: The main power supply incoming cabinet is equipped with a main circuit breaker.
2. Outgoing cabinet: an outgoing switchgear for the distribution system, equipped with lower level electrical equipment.
3. Metering cabinet: a meter used to measure and record the amount of electricity supplied, simply put, it is an electricity meter used for collecting money. (Inside are PT, CT, and electricity meter).
4. Mother Union Cabinet: When the system has two power supply incoming lines and the two lines are mutually backup, it is necessary to connect the main mother lines of the two power supplies. The switchgear that connects the two sections of the bus is called a mother Union Cabinet. Note that the mother Union Cabinet and the two incoming cabinets are generally prohibited from being closed at the same time.
5. PT cabinet: installation of measuring devices and transformers.
6. ZRTBB capacitor compensation cabinet: a capacitor cabinet generally connected to the main busbar of the system, used for centralized reactive power compensation. Its main function is to improve power factor, enhance the transmission capacity of the line and transformer, and reduce line loss. It is generally installed in parallel with the incoming cabinet (the system has a PT cabinet, which should be a high-voltage system, and the low-voltage system does not have a PT cabinet - the PT cabinet is equivalent to a step-down transformer).
7,The function of the contact cabinet:
(1)The communication cabinet is used to connect several rows of low-voltage cabinets carried by several transformers, that is, when one transformer fails, another can be used to carry several rows of low-voltage cabinets.
(2)In terms of operation mode, under normal conditions, the connection is disconnected and the two transformers operate independently. When one of them malfunctions, disconnect its main circuit switch and close the contact switch, and the load power supply will be provided by the other one.
8. Ring main unit (switchgear): Ring main unit is a commonly used term, originally referring to load switchgear used for ring network power supply. Nowadays, it is often used as a synonym for load switchgear, regardless of whether it is used for ring network power supply.
9. Battery cabinet: equivalent to a battery, storing power,The battery cabinet has two functions:
(1)Make backup operation power supply.
(2)As the main power source for closing the circuit. When the switch is closed, a very large current is required, and the rectifier circuit cannot meet the needs of the closing coil. However, the battery has the characteristic of allowing short-term high current discharge, which makes up for the shortcomings of the rectifier circuit and enables the closing circuit to operate reliably.
10. DC screen (charging screen): converts AC power into DC power.
Components: Charging cabinet - Charging module - Monitoring module - Battery pack
11. Variable frequency cabinet: Ordinary power cabinets or control cabinets have been changed from traditional drag methods to variable frequency drag methods. In short: Apply a frequency converter to drive the control cabinet of the power device.
12. High voltage switchgear
13. Mid mounted switchgear: also known as armored type removable mid mounted metal enclosed switchgear, with a three-layer structure:
Upper level: busbar and instrument room
Middle layer: Circuit breaker room
Lower level: Cable room
Due to the fact that the circuit breaker is located in the middle layer, it is called an armored movable mid mounted metal enclosed switchgear, abbreviated as a mid mounted cabinet.
14. Power cabinet: A cabinet that provides power to rotating machines such as water pumps and generators in terms of its function.