KR20220101528A - A Automatic Transfer Switch - Google Patents

Abstract

The present invention relates to an automatic switching switch. Either normal power (NP) or emergency power (EP) is connected. Accordingly, when NP is out of power, an immediate switch to EP is made to supply power to a load (LP). When NP is restored, EP immediately switches to NP to supply power to the load. More specifically, the automatic switching switch includes a W-shaped cam or a heart-shaped camshaft. Accordingly, when a power outage occurs or power is restored, either NP or EP is connected. Thus, when NP is out of power, an immediate switch to EP is made to supply power to the load. When NP is restored, EP immediately switches to NP to supply power to the load.

Description

Automatic Transfer Switch {A Automatic Transfer Switch}

The present invention relates to an automatic changeover switch including a movable member including a W-shaped cam shaft, and more particularly, by connecting any one of the commercial power (NP) and the emergency power (EP) to the Automatic including a control unit that immediately converts the emergency power to the emergency power when the commercial power is out and supplies power to the load, and immediately converts the emergency power to the commercial power when the commercial power is restored and supplies power to the load (LP) In the changeover switch (ATS), the automatic changeover switch (ATS) has a W-shaped cam shaft for switching from the commercial power to the regular emergency power or from the emergency power to the commercial power at the time of the conversion. a movable element including; and a solenoid coil integrally configured inside the automatic changeover switch driven by a driving signal of the control unit; It relates to an automatic changeover switch configured to further include a brush mover connecting rod for connecting the mover unit and the solenoid coil.

In general, large buildings, factories, hospitals, etc. receive commercial power from a power supply such as Korea Electric Power and use it, and when an abnormality occurs in the commercial power supply, such as a power outage, emergency power is generated using the power generation facilities provided in the building. create and use In such large buildings, factories, and hospitals, normal power supply (NP) is connected to the load side to supply power to the load side (Load Power; LP), and when an abnormality occurs in the commercial power supply, emergency A high-voltage closed water switchboard equipped with an automatic power switching device including an automatic switching switch that connects an Emergency Power Supply (EP) to the load side and provides emergency power to the load side is installed.

As such, a power conversion device for selectively connecting two different power sources, such as commercial power and emergency power, to the load side has been developed and used in various forms according to its capacity or use. For example, in large buildings or factories that receive and use large-capacity power, a power conversion device is provided to selectively connect the commercial power supplied from the power supply source or the emergency power that is replaced in case of an abnormality in the commercial power to the load side. .

When explaining this in detail, first, FIG. 1 is a circuit configuration diagram of a power switching device of a conventional switchboard.

As shown in Figure 1, looking at the configuration of the circuit for switching power including the automatic changeover switch of the switchboard, commercial power (Normal Power, NP) normally supplied from KEPCO and emergency power supplied from the generator (Emergency Power, EP) and an automatic transfer switch (ATS, 4) for supplying power from the commercial power 1 or the emergency power 2 to the load 3 (Load Power, LP) installed.

Here, the automatic changeover switch (4) is normally transferred to the commercial power (1) to supply power to the load (3), and when the commercial power (1) is cut off, it is transferred to the emergency power (2) to the load (3) side. power was supplied to Therefore, this configuration has a form in which one automatic changeover switch 4 is installed between the commercial power source 1 and the emergency power source 2 and the load 3, so that when the commercial power supply 1 is cut off, an emergency Contact switching of the automatic changeover switch (4) for supplying the power (2) is performed.

This is a state in which the supply state of the commercial power input from the automatic changeover switch 4 is recognized, and the cutoff of the inputted commercial power 1 induces the operation of the automatic changeover switch 4 .

Figure 2 shows the general form of the conventional automatic changeover switch (4).

As can be seen from FIG. 2, each contact for connecting the commercial power contact (6) and the emergency power contact (7) is configured. When the commercial power (1) is cut off, it is transferred to the emergency power (2) and the load (3) When power is supplied to the side and the commercial power is restored, it includes a mover (5) for switching from the emergency power (2) to the commercial power (1), and a load contact ( 8) is included.

In addition, when switching from commercial power to emergency power or from emergency power to commercial power, an instantaneous arc is generated at the contact point, and an arc chamber 9 is included as an erasing space for erasing it.

On the other hand, in the conventional automatic changeover switch, a solenoid coil for simultaneously controlling a plurality of automatic changeover switches is formed outside, and the volume of the solenoid coil formed outside is bulky to help control a plurality of automatic changeover switches. It is achieved by the control of the control signal by the large solenoid coil of For this reason, there is a problem that the entire automatic changeover switch is replaced as a single part rather than individually when replacing the automatic telephone switch.

In addition, although the contact point of the automatic changeover switch has to be changed according to the power outage or power recovery of commercial power, serious problems such as returning to the original contact point again when the contact point is changed during power failure or power recovery are occurring.

Korean Patent Laid-Open Patent No. 10-2009-0084111 (August 05, 2009) Domestic Registered Utility Model No. 20-0371173 (December 23, 2004)

The present invention has been devised to solve the above-mentioned problems, and when the power is to be switched to either commercial power (NP) or emergency power (EP), the commercial power to the regular emergency power or from the emergency power It consists of a W-shaped cam shaft to help the conversion to commercial power and a mover including a spring to support it, and a small solenoid coil including a solenoid coil inside the automatic changeover switch The purpose is to provide an automatic transfer switch including.

According to the present invention for achieving the above object,

When the commercial power is cut off by connecting any one of the commercial power (NP) terminal and the emergency power (EP) terminal, it is immediately switched to the emergency power (EP) to supply power to the load and also the commercial power (NP) In the automatic changeover switch (ATS) including a control unit for supplying power (LP) to the load by immediately switching from the emergency power (EP) to the commercial power (NP) when this is returned, the automatic changeover switch (ATS) is A movable part including a movable bus bar and a W-shaped cam shaft for switching from the commercial power to the regular emergency power or from the emergency power to the commercial power at the time of the conversion; and a drive signal from the control unit a solenoid coil integrally formed inside the driven automatic changeover switch; and a brush mover connecting rod for connecting the mover unit and the solenoid coil; and a brush mover restoration spring for restoring the brush mover connecting rod.

In addition, the mover part selects any one of the commercial power (NP) and the emergency power (EP) at the time of the switching, and a mover spring for maintaining the selected movable bus bar; and the mover part by holding the midpoint of the mover part a pusher spring on the left and right sides of the mover part for switching the mover part to either the commercial power or the emergency power when the midpoint of It characterized in that it further comprises a mover center guide part connected to the; and a W cam moving spring to help the operation when the W cam is moved.

In addition, the solenoid coil is configured in the housing of the automatic changeover switch; characterized in that.

In addition, the movable bus bar comprises two movable bus bars (41a, 41b) as a pair; characterized in that.

In addition, when 2 to 4 of the automatic changeover switches are connected, the electrical connection with the solenoid coils inside the automatic changeover switch is connected using either a series connection or a parallel connection; characterized in that.

As described above, the automatic changeover switch according to the present invention has the advantage of easily changing the contact point when the center is broken despite a small external force using a W-type camshaft.

In addition, according to the present invention, it is possible to use a small volume solenoid coil because the external force by the solenoid acts small according to the W-type camshaft, so that it is possible to manufacture a low-cost automatic changeover switch.

In addition, according to the present invention, by configuring the solenoid coil integrally inside the automatic changeover switch, there is an advantage that can be replaced and repaired individually.

In addition, according to the present invention, the change of the contact point is reliably made according to the W-type camshaft, so that the input to the previous contact point is prevented in case of power failure or power recovery when the contact point is changed.

In addition, according to the present invention, by installing a movable bus bar using a plurality of movable bus bars in the mover part to easily increase the current capacity of the automatic changeover switch, it is possible to easily change the design according to the change in the current capacity of the automatic changeover switch. There are advantages that can be

1 is a circuit configuration diagram of a power switching device of a conventional switchboard.
Figure 2 is a conventional automatic changeover switch.
3 is an automatic changeover switch of a temporary example of the present invention.
Figure 4 is an automatic changeover switch including two movable bus bars.
5 is an operating principle of the W cam of the present invention.
6 is a process of switching from commercial power (A) to emergency power (B).
7 is a process of switching from emergency power (B) to commercial power (A).
8 is a serial force connection of automatic changeover switches according to the type of control power.
9 is a parallel connection of automatic changeover switches according to the type of control power.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

3 shows an embodiment of the automatic changeover switch 10 of the present invention. An attachment plate 11 in which various components of the automatic changeover switch 10 can be installed is provided on one side of the automatic changeover switch 10, and a shaft hole (not shown) is formed in the approximate center of the attachment plate 11 has been The automatic changeover switch 10 of the present invention is largely divided into three components. First, the first is the configuration of the contact point of the movable bus bar 41 for selecting and connecting any one of the commercial power (NP) contact (20) and the emergency power (EP) contact (30). The second is the configuration of the movable element unit 40 including the cable 81 for connecting to the movable bus bar 41 and passing current, the contact 80 for supplying power to the load, and the W cam 42 . And the third is designed by dividing the brush mover restoration spring (49), the brush mover connecting rod (50), and the solneroid coil (60) into three parts.

Among them, the main shaft 44 of the mover body 43, which is substantially switched, is inserted through the shaft hole of the movable member 40, and one end is formed in a rectangular shape corresponding to the shaft hole and coupled thereto, the main shaft 44 ) has a movable bus bar 41 installed so that one of the commercial power (hereinafter referred to as A.) and emergency power (hereinafter referred to as B.) is connected to the load, so that the main shaft 44 of the mover body 43 is When this is rotated, the contact point of the movable bus bar 41 for connecting the power is designed to be switched. It is configured to further include an arc chamber 70 for extinguishing an electric arc generated when the movable bus bar 41 is switched.

In addition, FIG. 4 shows means for easily increasing the current capacity of the automatic changeover switch 10 and reducing the size of the movable bus bar 41 by easily changing the contact point of the movable bus bar 41 . Fig. 4 (a) shows only the movable member including the W cam and the brush movable member connecting rod 50, and shows two movable bus bars 41a and 41b. Figure 4 (b) shows the overall configuration of the automatic changeover switch 10 including two movable bus bars (41a, 41b). As can be seen from FIG. 4 , the movable bus bar 41 is divided into two and installed to increase the current capacity and reduce the size of the movable bus bar 41 .

In addition, as can be seen from FIG. 3 , the mover unit 40 includes a mover spring set 45 , a mover body 43 , a pusher spring 46 , a mover center guide 47 , and an alphabetic W (W) shape. It is configured to include a W cam moving spring 48 and a W cam 42 . Among them, the mover spring set 45 serves as an auxiliary for maintaining the contact point of the mover, and is configured to help the contact point to be continuously maintained.

First, the mover body 43 of the mover unit 40 is configured to function as an intermediary for loading the input power and allowing the mover to move to switch between commercial power and emergency power in order to switch the power on the input side.

The pusher spring 46 grabs the midpoint of the movable part 40 and converts the contact point of the movable bus bar 41 to commercial power and emergency power when the midpoint of the movable member part collapses, and at the same time, the contact point of the movable bus bar 41 is ensured It plays a role in helping to keep

When the position of the movable bus bar 41 changes, the mover center guide 47 reciprocates with each other and serves to help the mover move smoothly with commercial power and emergency power.

The W Cam moving spring 48 is configured to serve to set the position of the W Cam 42 inner body so that the W Cam 42 operates smoothly.

And, one of the main components of the present invention, the W cam 42 (or called heart cam.), is switched to the emergency power connection state when the contact point of the movable bus bar 41 is connected in the commercial power contact connection state, or Alternatively, the operation is performed to move the entire center of the mover unit 40 from the emergency power contact connection state to the commercial power connection state.

In addition, the solenoid coil unit is configured to include a solenoid coil (60), a brush mover restoration spring (49) and a brush mover connecting rod (50).

In the solenoid coil part, a current flows in the solenoid coil according to a control signal applied from an external controller (not shown), and a force (F) is generated according to the current ( i ) and the flux linkage (B) inside the solenoid coil. will do The generated force pulls the brush actuator connecting rod 50 toward the lower end, and the brush actuator 50 is operated by the pulled force. And when the current does not flow in the solenoid coil, the brush actuator returns to its initial position by the action of the brush actuator restoration spring 49 and the W cam transfer spring 47.

At this time, the brush mover connecting rod 50 serves to change the principle of motion from linear motion to rotational motion by the solenoid coil 60 and the brush mover restoration spring 49 .

In addition, the solenoid coil 60, which is one of the important components of the automatic changeover switch 10 of the present invention, is integrally located inside the automatic changeover switch 10 to reduce the volume of the automatic changeover switch 10. In addition to being carried out, it is configured to include the Double You Cam 49, so that when the input side commercial power to emergency power is switched from emergency power to commercial power, the movement of the movable bus bar 41 contact can be made quickly and accurately. It has the characteristics to be

5 is to show the operating principle of the W Cam 42, which is an important component of the present invention, and shows a case in which emergency power (EP) is switched to commercial power (NP). First, in Figure 5 (a), the control signal is not applied from the external control unit (not shown), the central axis of the W cam 42 is directed in the direction of the emergency power. 5 (b) is a case in which a control signal is applied from the outside. A current flows in the solenoid coil 60 by the control signal applied from the outside, and the downward direction according to the action of the solenoid coil 60 with the flux linkage. force is generated. By this generated force, the brush mover connecting rod 50 is pulled downward, and at this time, the central axis of the W cam 42 is moved by the brush mover connecting rod 50 pulling in the downward direction. 5( c ) shows that the control signal is not applied again from the external control unit (not shown), and the brush mover connecting rod 50 is pushed to its initial position and restored by the brush mover restoring spring 49 . Accordingly, it can be seen that the contact of the automatic changeover switch 10 is switched by the operation of the W cam 42 of the present invention.

6 and 7 each show a process in which the input power is converted from commercial power to emergency power or from emergency power (B) to commercial power (A). As stated in FIG. 3, when it is necessary to switch the commercial power or emergency power on the input side, when the contact on the input side switches to A-->B or B-->A, the current by the external controller in the solenoid coil 60 flows and the resulting force is generated, so the brush mover connecting rod 50 converts a linear motion into a reciprocating motion, and the W cam 42 breaks the center of the mover part 40 and moves it, so that the input side power is switched. It shows a case where it will happen.

8 and 9 show a form in which power is supplied by a series connection and a parallel connection when a plurality of automatic changeover switches 10 according to the type of power of the external control unit (not shown) are connected. 8 shows a case in which the voltage of the power applied from the outside is high, and the automatic changeover switch 10 is connected in series to show a case in which a plurality of automatic changeover switches change their contacts at the same time. On the other hand, Figure 9 shows a case where the voltage of the externally applied power is low, and the automatic changeover switch 10 is connected in parallel to show a case in which the contacts of a plurality of automatic changeover switches are switched at the same time. Therefore, it can be seen that the automatic changeover switch of the present invention can be easily changed and connected to a series or parallel connection according to the type of power supplied from the outside.

10: automatic changeover switch 11: mounting plate
20: commercial power contact
30: emergency power contact
40: movable part 41, 41a, 41b: movable bus bar
42: W (W) cam 43: movable body
44: main shaft 45: mover spring set
46: push spring 47: mover center guide
48: W cam moving spring 49: brush mover restoration spring
50: brush roller connecting rod
60: solenoid coil
70: arc chamber
80: Contact for supplying power to the load 81: Cable

Claims (5)

When the commercial power is cut off by connecting any one of the commercial power (NP) terminal and the emergency power (EP) terminal, it is immediately switched to the emergency power (EP) to supply power to the load and also the commercial power (NP) In the automatic changeover switch (ATS) including a control unit for supplying power (LP) to the load by immediately switching from the emergency power (EP) to the commercial power (NP) when this is returned,
The automatic changeover switch (ATS) includes a movable bus bar and a W-shaped cam shaft for switching from the commercial power to the regular emergency power or from the emergency power to the commercial power at the time of the conversion; Wow
A solenoid coil integrally configured inside the automatic changeover switch driven by the driving signal of the control unit; and
a brush mover connecting rod for connecting the mover unit and the solenoid coil; and a brush mover restoration spring for restoring the brush mover connecting rod. According to claim 1,
The mover part selects any one of the commercial power (NP) and the emergency power (EP) at the time of the switching and a mover spring for maintaining the selected movable bus bar; and
Left and right sides of the movable member for holding the midpoint of the movable member and switching the movable member to either the commercial power or the emergency power when the midpoint of the movable member is moved and maintaining the selected contact point by the switching push spring on; and
The mover center guide part connected to the end of the pusher spring; and
Automatic changeover switch, characterized in that; further comprising a W Cam moving spring to help the operation when the W Cam is moved. 3. The method of claim 2,
The automatic changeover switch, characterized in that the solenoid coil is configured inside the housing of the automatic changeover switch. According to claim 1,
The movable bus bar comprises two movable bus bars (41a, 41b) as a pair; automatic changeover switch, characterized in that. 4. The method of claim 3,
When 2 to 4 of the automatic changeover switches are connected, the electrical connection with the solenoid coils inside the automatic changeover switch is connected using either a series connection or a parallel connection; automatic changeover switch, characterized in that.

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