What are the cabinet types of ring network switch cabinet and circuit breaker cabinet? What are the

kyn28-12、sky-12、xgn17-12、xgn15-12

1. KYN44-12 armored removable indoor switchgear, also known as the central cabinet, is used to receive and distribute network power, and to control, protect and detect the circuit. This switchgear has the function of "five proofs", is equipped with VS1 or VD4 high-performance vacuum circuit breaker, and can be equipped with vacuum contactor and load switch.

2. SKY-12 armored removable indoor (double-layer cabinet) has a place for the circuit single bus or double bus segmentation system. The biggest advantage of double-layer cabinets is that one cabinet is worth two cabinets, saving space. Especially in high-rise buildings, where every inch of land is at a premium, it has considerable advantages.

3. XGN15-12 ring main unit is a complete set of supporting devices for 12KV three-phase AC and 50Hz power supply system with SF6 load switch as the main switch.

4. As a power supply unit and terminal equipment, XGN17-12 high-voltage load switch combination cabinet plays a role in the distribution of electric energy and the protection of electrical equipment. The high-voltage load switch combination cabinet is equipped with FN5 load switch (spring operating mechanism). Generally, it is manually operated, reliable and durable, non-burning and dangerous, and has a reliable "five prevention" function.

The following cabinet types are commonly used in ring main units: such as 8DJH

Load switch cabinet (inlet cabinet) r

Load switch + fuse combination electrical cabinet (transformer outlet cabinet) T metering cabinet M circuit breaker cabinet L

What is a ring main unit? What is the difference between it and the general switchgear?

Hello, dear, the ring main unit "is a switch cabinet (outgoing switch cabinet) for each distribution branch, and the bus of this switch cabinet is also a part of the ring trunk. That is to say, the ring trunk is composed of the bus bars of each outlet cabinet connected together. Each outlet cabinet is called "ring main unit".

These ring main units are not large, so the high-voltage switch of the ring main unit generally does not use a circuit breaker with a complex structure but a high-voltage load switch with a high-voltage fuse with a simple structure.

First, the reference is different.

1. Ring main unit: It is a group of electrical equipment for transmission and distribution (high-voltage switchgear) installed in a metal or non-metal insulated cabinet or made into an assembled interval ring network power supply unit.

2. High-voltage switchgear: equipment used for power system power generation, transmission, distribution, power conversion and consumption, which plays the role of on-off, control or protection.

Second, the characteristics are different.

1. Ring main unit: the core part adopts load switch and fuse, which has the advantages of simple structure, small size, low quality, can improve power supply parameters and performance, and power supply safety. Empty wheel chain.

2. High-voltage switchgear: it has the functions of overhead inlet and outlet, cable inlet and outlet, bus connection and so on.

Third, the use is different.

1. Ring main unit: It is widely used in the distribution station and box-type substation of load centers such as urban residential quarters, high-rise buildings, large public buildings, factories and enterprises.

2. High-voltage switchgear: It should be suitable for power plants, substations, petrochemical dousun workers, metallurgical steel rolling, light industry and textiles, factories and mines, residential quarters, high-rise buildings and other different places.

The ring main unit is an important equipment in the power system, which is mainly used to control, protect and distribute electricity. A circuit breaker residual transport plus a load switch can effectively prevent short-circuit currents in the power system, so as to protect the safe operation of the power system. The circuit breaker can automatically cut off the power supply when the short-circuit current occurs, so as to avoid the damage of the electrical equipment. The load switch is resistant and can disconnect the load when needed for maintenance.

In addition, circuit breakers and load switches can control the current in the power system for efficient distribution of power.

2. The main body in the switch cabinet is the switch, which has the function of turning on and cutting off the load current, and at the same time has the function of cutting off the fault current, this function is amazing, because the load current is 1A, the short-circuit current may reach 1000A, if it is easy to make a switch according to 1A, it will be more troublesome to make a 1000A switch; For different uses, people have made switches that can turn on or off the load current, which is low cost and cannot be combined with protection, so people call it "load switch"; It also manufactures a switch that can cut off the short-circuit current, it has arc extinguishing ability, complex structure, high cost, and can be used with protection and automatic devices, people call it "circuit breaker"; Generally speaking, the circuit breaker with arc extinguishing ability is installed in the switch cabinet; The ring main unit is equipped with a load switch that can only be operated manually;

3. Through the above analysis, it can be seen that it is used for medium voltage switchgear with equipment, and the circuit breaker is built-in, because we not only need to operate, but also need protection; For power supply contact or line segmentation control, you can choose a simplified ring main unit, and there is no protection inside; The advantages of choosing a ring main unit are small size, low cost, simple structure, easy maintenance, and sufficient;

4. It should be noted that in recent years, some people have modified the ring main unit, added the protective part, or installed a fuse as a protective element to replace the medium voltage switchgear and used it in the load station, but its internal space is small, the resistance to the arc is limited, the model is incomplete, the measurement is not perfect, and the cost is not low after the transformation.

1. There is basically no switch cabinet for high voltage, because the voltage is too high, so there is a switch, and there is no need to install it in the cabinet; The switchgear you are talking about is a medium-voltage switchgear, and a "simplified" version of the medium-voltage switchgear is used for the connection and distribution between medium-voltage lines, which is the ring main unit, so the ring main unit is a kind of medium voltage cabinet;

2. The main body in the switch cabinet is the switch, which has the function of turning on and cutting off the load current, and at the same time has the function of cutting off the fault current, this function is amazing, because the load current is 1A, the short-circuit current may reach 1000A, if it is easy to make a switch according to 1A, it will be more troublesome to make a 1000A switch; For different uses, people have made switches that can turn on or off the load current, which is low cost and cannot be combined with protection, so people call it "load switch"; It also manufactures a switch that can cut off the short-circuit current, it has arc extinguishing ability, complex structure, high cost, and can be used with protection and automatic devices, people call it "circuit breaker"; Generally speaking, the circuit breaker with arc extinguishing ability is installed in the switch cabinet; The ring main unit is equipped with a load switch that can only be operated manually;

3. Through the above analysis, it can be seen that it is used for medium voltage switchgear with equipment, and the circuit breaker is built-in, because we not only need to operate, but also need protection; For power supply contact or line segmentation control, you can choose a simplified ring main unit, and there is no protection inside; The advantages of choosing a ring main unit are small size, low cost, simple structure, easy maintenance, and sufficient;

4. It should be noted that in recent years, some people have modified the ring main unit, added the protective part, or installed a fuse as a protective element to replace the medium voltage switchgear and use it in the load station, but its internal space is small, the resistance to the arc is limited, the model is incomplete, the measurement is not perfect, and the cost after the transformation is not low.

The ring main unit is a kind of high-voltage switchgear. The ring main unit has a simple structure, a relatively small capacity, and is cheap. In the power grid, the ring main unit is generally used in the terminal, and the upper level of the ring main unit is generally used with other switchgear with higher performance.

The difference between high-voltage switchgear and ring main unit You go to the effect search Someone has done a comparative evaluation.

2. The main copy body in the switch cabinet is the switch, which has the function of turning on and cutting off the load current, and at the same time has the function of cutting off the fault current, this function is amazing, because the load current is 1A, the short-circuit current may reach 1000A, if it is easy to make a switch according to 1A, it is much more troublesome to make a 1000A switch; For different uses, people have made switches that can turn on or off the load current, which is low cost and cannot be combined with protection, so people call it "load switch"; It also manufactures a switch that can cut off the short-circuit current, it has arc extinguishing ability, complex structure, high cost, and can be used with protection and automatic devices, people call it "circuit breaker"; Generally speaking, the circuit breaker with arc extinguishing ability is installed in the switch cabinet; The ring main unit is equipped with a load switch that can only be operated manually;

3. Through the above analysis, it can be seen that it is used for medium voltage switchgear with equipment, and the circuit breaker is built-in, because we not only need to operate, but also need protection; For power supply contact or line segmentation control, you can choose a simplified ring main unit, and there is no protection inside; The advantages of choosing a ring main unit are small size, low cost, simple structure, easy maintenance, and sufficient;

4. It should be noted that in recent years, some people have modified the ring main unit, added the protective part, or installed a fuse as a protective element to replace the medium voltage switchgear and used it in the load station, but its internal space is small, the resistance to the arc is limited, the model is incomplete, the measurement is not perfect, and the cost is not low after the transformation.