How to see the high voltage outlet cabinet and the low voltage outlet cabinet

From the model of the switch, the model of the electrical cabinet starting with G indicates the low-voltage switchgear. GGD is an AC low-voltage distribution cabinet.

The incoming cabinet is a switch cabinet that introduces power from the outside. Generally, the 10kV power supply is introduced from the power supply network, and the 10kV power supply is sent to the 10kV bus through the switch cabinet, and this switch cabinet is the incoming power cabinet.

The outlet cabinet is a switch cabinet that distributes electrical energy from the bus.

From the 10kV bus to the power transformer through the switchgear, this switchgear is one of the 10kV outlet cabinets. Install an outlet switchgear on the low-voltage side of the transformer, send the electric energy to the low-voltage bus through this switchgear, and then install a number of low-voltage switchgear on the low-voltage side to send the electric energy to each power place. These low-voltage switchgear are all outlet cabinets.

If the low-voltage system is introduced from the nearest area, the low-voltage switchgear connected to the incoming line is also the incoming cabinet, but the low-voltage is only. The switch cabinet that leads from the low-voltage bus is also an outlet cabinet.

In the 10 thousand volt system, the former is generally equipped with insulating beads and the latter only has a terminal block, the concept of high and low voltage is relative, for example, 220000V and 10000V are high voltage, but in a transformer system is divided into high voltage and low voltage, but the insulation level of the outlet cabinet is different, and the corresponding distance between the lines and the height of the porcelain column for ground insulation are also different.

According to the national industry standard for AC low-voltage distribution cabinets for new energy-saving products, the voltage of the outgoing voltage of low-voltage distribution cabinets is 380V for three-phase and 220V for single-phase.

The rated current of the low-voltage distribution cabinet is AC 50Hz, the rated voltage of 380V power distribution system, the main role is to distribute power, the voltage through the transformer to each power unit, for the low-voltage distribution system power, lighting power distribution.

Hello:——1,For power transformers in China, the secondary rated output voltage is the standard KV (400 V), which will be clearly marked on the nameplate of the transformer.

Low-voltage distribution cabinetThe distance from the transformer is very close, the normal value of the outlet voltage of the distribution cabinet should be kv (400 V), if it is lower than kv, the tap of the transformer should be adjusted.

It should be more electricity than the home location!

According to the national industry standard for AC low-voltage distribution Qinwang cabinet of new energy-saving products, the voltage of the outlet of low-voltage distribution cabinet is: three-phase is 380 volts; Single-phase is 220 volts.

The main technical performance of the low-voltage distribution cabinet:

Rated working voltage: 380 volts, 660 volts; Frequency of use: 50 Hz; Type Shoushan Rated Current:

1600 to 3150 amps for horizontal bus systems, 400 to 800 amps for vertical bus systems; Rated short-time withstand current: horizontal bus 80 kA, effective value every 1 second, vertical bus 50 kA, effective value every 1 second; Rated peak current: horizontal bus 175 kA, vertical bus 110 kA; Functional unit breaking capacity:

50 kA; Peripherals protection level: IP40.

When power is transmitted: the power side is sent first, and then the load side is sent to the car.

Power Transmission High-voltage power supply--- high-voltage outlet--- ground pressing--- low-voltage outgoing line --- load.

Inlet cabinet: It is a switch cabinet that introduces power supply from the outside, generally from the power supply network to introduce 10kV power supply, and the 10kV power supply sends the electric energy to the 10kV bus through the switch cabinet, and this switch cabinet is the inlet cabinet.

Composition: vacuum circuit breaker, disconnector, three groups of three-coil current transformers, lightning arresters, live displays, voltage transformers, wires and other components.

1.Kaizhenye Closed Station: It is a combination of switchgear with an all-metal seal and a voltage level below 10kV that can operate outdoors;

The 10kV distribution room switch cabinet and its function, the power supply system is used to step down the high voltage through the transformer to the ridge level such as the voltage required by the user, and is equipped with an indoor integrated system of protection, metering and distribution.

Composition: incoming cabinet, metering cabinet, PT cabinet, outlet cabinet, contact cabinet, isolation cabinet.

What is the difference range between the power of the low-voltage inlet cabinet and the low-voltage outlet cabinet? Why is the power supply of the inlet cabinet after the transformer 10% higher than that of the outlet cabinet next to it?

The power difference between the low-voltage inlet cabinet and the low-voltage outlet cabinet should generally not be too large. Under normal circumstances, the power of the incoming and outgoing cabinets should be consistent to ensure the stable and safe operation of the power system. If the power of the incoming cabinet is 10% higher than that of the outgoing cabinet immediately connected to it, this may be related to a number of factors, such as:

1.The incoming cabinet receives power closer to the transformer than the outlet cabinet. Therefore, the power received by the inlet cabinet may be more stable and powerful than that of the outlet cabinet, resulting in a higher power supply of the inlet cabinet than the outlet cabinet.

2.There is a cable hall loss between the inlet cabinet and the outlet cabinet. Circuit resistance causes current loss, which leads to a decrease in charge.

If there is a long distance of cable between the inlet cabinet and the outlet cabinet, the power loss may be large, and the power of the inlet cabinet may be higher than that of the outlet cabinet. 3.The outlet cabinet may be overloaded or faulty.

If the load in the outlet cabinet is too concentrated or there is a fault problem, it may cause the circuit resistance to increase, the current to drop, and the power to decrease, resulting in a higher power supply in the inlet cabinet than the outlet cabinet. In order to ensure the stable and safe operation of the power system, it is necessary to investigate and troubleshoot the power discrepancies. The process requires the involvement of a professional in the power industry, Brother Jane, to ensure that the problem is properly resolved.

What is the difference range between the power of the low-voltage inlet cabinet and the low-voltage outlet cabinet? Why is the power supply of the inlet cabinet after the transformer 10% higher than that of the outlet cabinet next to it?

Hello, it is a pleasure to serve you. The difference in power between the low-voltage inlet cabinet and the low-voltage outlet cabinet mainly depends on the cable resistance, cable length, load power factor and other factors. In general, if the two are directly connected to each other, the difference in power between them is negligible.

As for why the power of the inlet cabinet after the transformer is 10% higher than that of the outlet cabinet next to it, it may be due to the following reasons: different cable lengths: the cable length between the transformer inlet cabinet and the outlet cabinet may be different, and the longer cable will have a certain delay resistance, which will lead to the loss of power.

Different load power factor: If the load power factor behind the transformer is different from the load power factor of the outlet cabinet, then it may lead to the loss of power. For example, if the load power factor behind the transformer is high, then the current size of the incoming cabinet will be larger than that of the outgoing cabinet, resulting in the loss of power.

Different equipment parameters: The inlet cabinet and the outlet cabinet may use different models and specifications of equipment, and their internal circuit parameters may also be different, and these different factors may also affect the difference in power consumption.