CN219659474U

CN219659474U - More stable incoming line circuit

Info

Publication number: CN219659474U
Application number: CN202321144786.5U
Authority: CN
Inventors: 李文婷; 黄风乐; 徐高权; 王钦成; 江占斌
Original assignee: Jiangxi Taihao Intelligent Power Technology Co ltd
Current assignee: Jiangxi Taihao Intelligent Power Technology Co ltd
Priority date: 2023-05-12
Filing date: 2023-05-12
Publication date: 2023-09-08
Anticipated expiration: 2033-05-12

Abstract

A more stable incoming line circuit comprises a first incoming line cabinet, a second incoming line cabinet, a generator incoming line cabinet and a contact cabinet, wherein a self-switching controller is arranged in the generator incoming line cabinet; a first transformer T1 is arranged in the first incoming line cabinet, the first transformer T1 is connected with a first bus, and the first bus is used for supplying power to a load; the generator inlet wire cabinet is provided with a power generation transformer T3, the power generation transformer T3 is connected with a second bus, the second bus is used for supplying power to a load, and the first bus is connected with the second bus; the second incoming line cabinet is provided with a second transformer T2, the second transformer T3 is connected with a third bus, and the third bus is connected with the second bus; one end of the contact cabinet is connected with the second bus, and the other end of the contact cabinet is connected with the third bus; the first transformer T1 is connected with the power generation transformer T3 through a first bus, a switch K1 and a switch K2, the second bus is connected with a third bus through a switch K4, and the third bus is connected with the second transformer T2 through a switch K3.

Description

More stable incoming line circuit

Technical Field

The utility model relates to the field of power distribution cabinets, in particular to a more stable incoming line circuit.

Background

The existing two-wire and one-bus system realizes electrical interlocking through two-wire and one-bus, and a connecting cabinet is normally open under the general condition, so that the two-wire and one-bus system is a standby power supply system, and can only ensure half of loads to supply power under the condition of overhauling or encountering unexpected faults, and can still temporarily cut off power when one-wire fails.

Disclosure of Invention

In order to solve the problems, the technical scheme provides a more stable incoming line circuit.

In order to achieve the above purpose, the technical scheme is as follows:

a more stable incoming line circuit comprises a first incoming line cabinet, a second incoming line cabinet, a generator incoming line cabinet and a connection cabinet, wherein a self-switching controller is arranged in the generator incoming line cabinet;

a first transformer T1 is arranged in the first incoming line cabinet, the first transformer T1 is connected with a first bus, and the first bus is used for supplying power to a load;

the generator inlet wire cabinet is provided with a power generation transformer T3, the power generation transformer T3 is connected with a second bus, the second bus is used for supplying power to a load, and the first bus is connected with the second bus;

the second incoming line cabinet is provided with a second transformer T2, the second transformer T3 is connected with a third bus, and the third bus is connected with the second bus;

one end of the contact cabinet is connected with the second bus, and the other end of the contact cabinet is connected with the third bus;

the first transformer T1 is connected with the power generation transformer T3 through a first bus, a switch K1 and a switch K2, the second bus is connected with a third bus through a switch K4, and the third bus is connected with the second transformer T2 through a switch K3.

In some embodiments, a current transformer is disposed across the switch K1.

In some embodiments, one end of the switch K4 is provided with a current transformer.

In some embodiments, one end of the switch K3 is provided with a current transformer.

The utility model has the beneficial effects that:

according to the system of the two incoming lines, the connecting cabinet and the generator incoming line, which are used by the control loop, the automatic switching controller is arranged on the generator incoming line cabinet, so that functions of automatic switching, automatic non-switching and the like can be realized, overload operation of any transformer can be avoided, the two incoming lines can operate simultaneously, the power supply stability is greatly improved, the system can be applied to primary power supply load places such as large hospitals, rescue centers, military command centers, national major political conference centers, large banks and the like, and the power supply stability is ensured.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are required to be used in the description of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an embodiment of the present utility model.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1, a more stable incoming circuit includes a first incoming cabinet, a second incoming cabinet, a generator incoming cabinet and a contact cabinet;

Further, current transformers are arranged at two ends of the switch K1.

Further, one end of the switch K4 is provided with a current transformer.

Further, one end of the switch K3 is provided with a current transformer.

Working principle: the circuit control diagram of the utility model is shown in the figure. K1, K2, K3, K4 are 1# inlet wire, generator inlet wire, 2# inlet wire, tie cabinet switch respectively, at generator inlet wire cabinet installation 1 spare power automatic switching controller, can realize following logic function:

(1) Self-casting and non-self-resetting: normally, the two incoming lines have the pressure K1 and K3 combined, and the K2 and K4 separated. When the incoming line 1 is in voltage loss and the incoming line 2 is in voltage, dividing into K1 and K4; when the incoming line 2 is in voltage loss and the incoming line 1 has voltage, K3 and K4 are separated. When the incoming lines 1 and 2 are not pressed, K1 and K3 are divided, the generator is started to detect that the output of the generator is pressed within 60 seconds, and K2 is combined, but K4 is not combined

(i.e. the generator only ensures the supply of the low voltage side of the T1 transformer). After 60 seconds, the starting time-out automatic switching failure of the non-voltage generator is realized, and the standby automatic switching is withdrawn and can be put into operation only by resetting.

(2) Self-casting and self-resetting: when the incoming line 1 is restored under pressure, the generator is stopped to be divided into K2 and K1 and K4; when the incoming line 2 is restored under pressure, the generator is stopped, and K2 and K3 and K4 are separated; when the incoming lines 1 and 2 are recovered simultaneously, the generator is stopped to divide K2, and K4 is divided and then K1 and K3 are combined; the automatic casting process is the same as the automatic casting process and is not repeated.

In order to ensure that any one transformer does not overload when running independently, if and only if the K1 and K3 switches are switched on, the switches of all the air conditioner power consumption loops can be switched on (realized by controlling the under-voltage coils of the switches of the air conditioner power consumption loops through the series connection of the K1 and K3 normally open contacts), and meanwhile, the standby power automatic switching device sets a contact switch K4 to switch on in a delayed mode (the delay time is 0.1s-99.9s adjustable).

The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the utility model, but rather is presented in the claims.

Claims

1. A more stable incoming line circuit is characterized by comprising a first incoming line cabinet, a second incoming line cabinet, a generator incoming line cabinet and a contact cabinet;

2. A more stable incoming circuit according to claim 1, characterized in that: and current transformers are arranged at two ends of the switch K1.

3. A more stable incoming circuit according to claim 2, characterized in that: one end of the switch K4 is provided with a current transformer.

4. A more stable incoming circuit according to claim 3, characterized in that: one end of the switch K3 is provided with a current transformer.