CN215733640U

CN215733640U - Control power supply and UPS power supply switching circuit

Info

Publication number: CN215733640U
Application number: CN202121637431.0U
Authority: CN
Inventors: 丁宁; 高明阳
Original assignee: Liaoning Huaxin Switch Electric Appliance Co ltd
Current assignee: Liaoning Huaxin Switch Electric Appliance Co ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2022-02-01
Anticipated expiration: 2031-07-19

Abstract

The utility model discloses a control power supply and UPS power supply switching circuit, which comprises a control power supply uninterrupted system consisting of a secondary small bus, a small air switch, a UPS continuous power supply and an intermediate relay, wherein a power supply PT and a commercial power supply in a cabinet are conducted with an auxiliary switching point of the intermediate relay through the UPS continuous power supply, and the uninterrupted power supply of the power supply PT and the commercial power supply to the control bus is realized through the coil attraction of the intermediate relay. The utility model can be switched to the mains supply even if the power supply PT in the field cabinet stops supplying power, and can still supply power for more than half an hour after the mains supply and the power supply PT stop supplying power, and ensure the opening circuit breaker for more than three times.

Description

Control power supply and UPS power supply switching circuit

Technical Field

The utility model relates to a switching circuit, in particular to a control power supply and UPS power supply switching circuit.

Background

With the vigorous development of science and technology in China, the requirements of people on life quality are increasingly improved, the requirements on power supply reliability are increasingly multiplied, the requirements on power quality are stricter, and continuous power supply and distribution requirements are continuously provided, so that the uninterrupted power supply of a control power supply of a power distribution system is scheduled, the realization of the uninterrupted power supply is imperative, and the safety of the power supply and distribution system is remarkably improved.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide a circuit for controlling the switching between a power supply and a UPS power supply, which adopts a scheme of more reliably and more reasonably controlling the uninterrupted power supply, can be switched to the power supply of commercial power even if a power supply PT in a field cabinet stops supplying power, can still supply power for more than half an hour after the commercial power and the power supply PT stop supplying power, and ensures a brake-separating circuit breaker for more than three times.

The utility model is realized by the following technical scheme: the utility model provides a control power supply and UPS power supply switching circuit, includes the uninterrupted system of control power supply that the little generating line of secondary, little sky open, UPS lasts power and auxiliary relay constitute, and power PT and commercial power in the cabinet switch on through UPS lasting power and auxiliary switching point of auxiliary relay, and the coil actuation through auxiliary relay realizes that power PT and commercial power supply are to the uninterrupted power supply of control generating line.

Preferably, the small-space mining uses more than one alternating-current small-space switch, which comprises a small-space switch 2ZK, a small-space switch 3HK and a small-space switch 2HK, wherein the power supply PT in the cabinet supplies power, the power supply passes through the small-space switch 2ZK, reaches the closing point of the intermediate relay KA, and passes through the small-space switch 3HK and the small-space switch 2HK and is uploaded to the small bus.

The utility model has the beneficial effects that: the utility model adopts the switching circuit, even if the power supply PT in the field cabinet stops supplying power, the power supply PT can be switched to the commercial power supply, and when the commercial power and the power supply PT stop supplying power, the power supply can still supply power for more than half an hour, and the opening circuit breaker is ensured for more than three times.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of the electrical principle of power switching between a cabinet power supply PT and a mains supply and a UPS;

fig. 2 is a schematic diagram of the electrical principle of power switching between the cabinet power supply PT and the UPS.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly

In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The utility model relates to a control power supply and UPS power supply switching circuit, which comprises a control power supply uninterrupted system consisting of a secondary small bus, a small air switch, a UPS continuous power supply and an intermediate relay, wherein a power supply PT and a commercial power supply in a cabinet are conducted with an auxiliary switching point of the intermediate relay through the UPS continuous power supply, and the uninterrupted power supply of the power supply PT and the commercial power supply to the control bus is realized through the coil attraction of the intermediate relay.

The power PT in the cabinet provides power, passes through the small air switch 2ZK, reaches the intermediate relay KA closing point, and is uploaded to the small bus through the small air switch 3HK and the small air switch 2 HK.

As shown in figure 1, under the normal operation condition, the power supply PT in the cabinet is used for providing power, and the power supply PT passes through the small air switch of 2ZK and reaches the closing point of the KA intermediate relay, and is uploaded to the small bus through the small air switch of 3HK and 2 HK. When power PT damaged and the condition of overhauing appear, the commercial power opened to UPS and charges and output power through the little sky of 1ZK, KA auxiliary relay coil got electric this moment, the coil actuation, the auxiliary point changes, KA auxiliary relay auxiliary point on point becomes the off point, the power passes to 3HK, the little sky of 2HK is opened and is passed to little generating line, the KA auxiliary relay auxiliary point on the PT side of this moment becomes the on point, cut off power PT power supply, accomplish the automatic switch-over of power. The whole process is completely automatic switching, and the uninterrupted switching of the control power supply can be completed under the condition that no person is on duty.

As shown in fig. 2, under the normal operation condition, the power supply PT in the cabinet is used for providing power, the power supply PT passes through the 2Q small space switch and respectively enters the UPS and the KA intermediate relay, when the UPS power supply has no fault, the output port outputs voltage, the coil of the KA intermediate relay is electrified, the coil is attracted, the auxiliary point is changed, the on point of the auxiliary point of the KA intermediate relay is changed into the off point, and the power supply is transmitted to the small bus. When the UPS fails, the output port cannot output power, the coil of the KA intermediate relay cannot be electrified, the coil cannot be attracted, the auxiliary point is not changed, the power is directly transmitted to the small bus through the closed point of the KA intermediate relay, and automatic switching of the power is completed.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. A control power supply and UPS power supply switching circuit is characterized in that: the UPS uninterrupted power supply system comprises a secondary small bus, a small air switch, a UPS continuous power supply and an intermediate relay, wherein a power supply PT and a mains supply in a cabinet are conducted with an auxiliary switching point of the intermediate relay through the UPS continuous power supply, and the coil attraction of the intermediate relay is used for realizing the uninterrupted power supply of the power supply PT and the mains supply to the control bus.

2. The control power supply and UPS power switching circuit of claim 1, wherein: the small-space mining is with more than one interchange small-space switch, and it includes that the small-space switches 2ZK, the small-space switches 3HK, the small-space switches 2HK, and power PT provides the power in the cabinet, through the small-space switches 2ZK, to the auxiliary relay KA closing point, through the small-space switches 3HK, the small-space switches 2HK uploads to the little generating line.