CN110085463B - Lock assembly for components of an electrical distribution system - Google Patents
Lock assembly for components of an electrical distribution system Download PDFInfo
- Publication number
- CN110085463B CN110085463B CN201810078788.6A CN201810078788A CN110085463B CN 110085463 B CN110085463 B CN 110085463B CN 201810078788 A CN201810078788 A CN 201810078788A CN 110085463 B CN110085463 B CN 110085463B
- Authority
- CN
- China
- Prior art keywords
- lock
- shaft
- connector
- distribution system
- lock assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/16—Indicators for switching condition, e.g. "on" or "off"
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
- H01H9/281—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock
Abstract
The present invention relates to a lock assembly for a component of an electrical distribution system. An electrical distribution system includes a first lock assembly and a second lock assembly. The first lock assembly includes a first lock rotatable about a first axis and a second lock rotatable about a second axis. The first lock assembly also comprises a first connector arranged to prevent rotation of the first lock when the switching device is in the switching device first position and to prevent rotation of the second lock when the switching device is in the switching device second position. The power distribution system also includes a second lock assembly including a third lock rotatable about a third axis and a fourth lock rotatable about a fourth axis. The second lock assembly also includes a second connector coupled to the indicator. The second connector is arranged to prevent rotation of the third lock when the circuit protection device is in the circuit protection device first position and to prevent rotation of the fourth lock when the circuit protection device is in the circuit protection device second position.
Description
Technical Field
The present application relates generally to power distribution systems and, more particularly, to a lock assembly for components of a power distribution system.
Background
At least some known power distribution systems include a plurality of switchgear arrays, including circuit breakers, coupled to one or more loads. The circuit breaker is configured to interrupt current to the load if the current is outside of acceptable conditions. The circuit breaker is positionable between a first testing position and a second operating position. For example, some power distribution systems include Vacuum Circuit Breakers (VCBs) and positionable VCB carts.
At least some known power distribution systems include switching devices to protect operators from current flowing through the power distribution system. For example, at least some known switching devices are configured to selectively isolate a circuit breaker and allow an operator to safely access and/or remove the circuit breaker. The switching device is positionable between an open position and a closed position.
At least some known power distribution systems include a lock assembly for a circuit breaker and/or a switching device. Sometimes, the lock assembly contains separate locks for different positions of the component. However, it is not readily visible to the operator whether the switching device and/or the circuit breaker is in the first position or in the second position. As a result, an operator may attempt to operate an incorrect lock for the current position of the respective component and/or attempt to override the current position of the component.
Disclosure of Invention
In one aspect, a power distribution system is provided. The power distribution system includes a circuit protection device arranged to interrupt current flowing through a circuit and a switching device coupled to the circuit protection device. The circuit protection device is positionable between a circuit protection device first position and a circuit protection device second position. The switching device is positionable between a switching device first position and a switching device second position. The switching device comprises an actuation mechanism. The power distribution system includes a first lock assembly coupled to the switching device. The first lock assembly includes a first lock rotatable about a first axis and a second lock rotatable about a second axis. The first lock assembly also includes a first connector coupled to the switching device. The first connector extends from the switching device to the first lock and the second lock. The first connector is arranged to prevent rotation of the first lock when the switching device is in the switching device first position and to prevent rotation of the second lock when the switching device is in the switching device second position. The power distribution system also includes a second lock assembly including an indicator arranged to indicate a position of the circuit protection device. The second lock assembly also includes a third lock rotatable about a third axis and a fourth lock rotatable about a fourth axis. The second lock assembly also includes a second connector coupled to the indicator. The second connector is arranged to prevent rotation of the third lock when the circuit protection device is in the circuit protection device first position. The second connector is arranged to prevent rotation of the fourth lock when the circuit protection device is in the circuit protection device second position.
In another aspect, a lock assembly for a circuit protection device of a power distribution system is provided. The lock assembly includes an indicator arranged to indicate the position of the circuit protection device. The lock assembly also includes a first lock rotatable about a first axis and a second lock rotatable about a second axis. The lock assembly also includes a connector coupled to the first lock and the second lock. An indicator is coupled to the connector and arranged to cause the connector to move between a first position of the connector and a second position of the connector. The connector is arranged to prevent rotation of the first lock when the connector is in the connector first position and to prevent rotation of the second lock when the connector is in the connector second position.
Drawings
FIG. 1 is a perspective view of an exemplary power distribution system;
FIG. 2 is a perspective view of a portion of the power distribution system shown in FIG. 1;
fig. 3 is a front perspective view of a first lock assembly of the power distribution system shown in fig. 1 and 2;
FIG. 4 is a rear perspective view of the first lock assembly;
FIG. 5 is a front perspective view of a portion of the first lock assembly;
FIG. 6 is an exploded view of a portion of the first lock assembly;
FIG. 7 is a rear perspective view of a portion of the first lock assembly;
FIG. 8 is a top view of a portion of the first lock assembly;
Fig. 9 is a front perspective view of a portion of a second lock assembly of the power distribution system shown in fig. 1 and 2; and is also provided with
Fig. 10 is a rear perspective view of a portion of the second lock assembly.
Although specific features of various embodiments may be shown in some drawings and not in others, this is for convenience only. Any feature of any figure may be referenced and/or claimed in combination with any feature of any other figure.
Parts list
100. Power distribution system
106. Circuit protection device
110. Switching device
112. First lock assembly
113. Second lock assembly
116. First lock
118. Second lock
120. Connector with a plurality of connectors
122. Protective piece
124. An opening
125. An opening
126. Bracket
128. First shaft
129. Board board
130. An axis line
131. Window
132. Second shaft
134. An axis line
136. Body
138. A first opening
140. A second opening
142. First part
144. Second part
146. First part
148. Second part
150. An axis line
152. Biasing member
153. Arm
154. First connecting rod
155. Gap of
156. Second connecting rod
157. Pin
158. A first opening
160. A second opening
161. Edge of the sheet
162. Biasing member
164. Padlock
166. Actuating mechanism
168. Third lock
170. Fourth lock
172. Connector with a plurality of connectors
174. Protective piece
176. An opening
178. An opening
180. Third shaft
181. An axis line
182. Fourth shaft
183. An axis line
184. Indicator device
185. Connecting rod
186. Body
188. A first opening
190. A second opening
191. An axis line
192. First part
194. Second part
196. First part
198. Second part
202. First connecting rod
204. Second connecting rod
206 L-shaped member
208. Arm
210. A first opening
212. A second opening
214. Arm
216. Gap of
218. Pin
219. Edges.
Detailed Description
In the following specification and claims, reference may be made to a number of terms, which should be defined to have the following meanings.
The singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise.
"optional" or "optionally" means that the subsequently described event or circumstance may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
Approximating language, as used herein throughout the specification and claims, may be applied to modify any quantitative representation that could permissibly vary without resulting in a change in the basic function to which it is related. Accordingly, a value modified by one or more terms, such as "about," "approximately," and "approximately," are not to be limited to a particular precise value. In at least some cases, the approximating language may correspond to the precision of an instrument for measuring the value. Here and throughout the specification and claims, range limitations may be combined and/or interchanged, such ranges can be identified and include all the sub-ranges contained therein unless context or language indicates otherwise.
Exemplary embodiments of power distribution systems and methods of operating power distribution systems are described herein. An exemplary power distribution system includes a plurality of lock assemblies. A first lock assembly of the plurality of lock assemblies includes a guard that restricts access to a switching device of the power distribution system. A second lock assembly of the plurality of lock assemblies includes an indicator that indicates a position of the circuit protection device and restricts access to the circuit protection device when the indicator indicates that the circuit protection device is in the second position. Each lock assembly includes a lock coupled to the connector. The connector provides exclusive operation of the locks within the respective lock assemblies. Furthermore, the lock assembly prevents insertion of the tool when the corresponding lock is in the locked position.
Fig. 1 is a perspective view of a portion of an exemplary power distribution system 100. The exemplary power distribution system 100 includes at least one source (not shown) that provides power to at least one load (not shown) via at least one circuit protection device 106. The electrical power source may include, for example, one or more generators, an electrical grid, or other devices that provide electrical current (and resulting electrical power) to the load. The current may be transferred to the load via the distribution bus. Loads may include, but are not limited to, machines, motors, lighting, and/or other electrical and mechanical equipment that make or generate electricity or distribute facilities.
In some embodiments, at least one circuit protection device 106 is housed in one or more switchgear units. The switchgear unit comprises a rack to which the circuit protection device 106 is mounted within the cabinet. The circuit protection devices 106 that are electrically close to each other may be arranged physically close to each other, e.g. in the same switchgear unit, or physically remote from each other, e.g. in separate switchgear units, in separate rooms, etc. Similarly, the circuit protection devices 106 that are electrically remote from each other may be disposed physically close to each other or physically remote from each other.
In an exemplary embodiment, the power distribution system 100 includes at least one switching device 110. In an exemplary embodiment, the switching device 110 is a ground switch configured to provide ground and isolation for the circuit protection device 106. The switching device 110 is positionable between an open position (broadly, a first position) and a closed position (broadly, a second position). In the first position, the switching device 110 allows current to flow through the circuit protection device 106. In the second position, the switching device 110 isolates the at least one circuit protection device 106 and inhibits current flow to the isolated circuit protection device 106. Thus, the switching device 110 is configured to reduce the risk of shock when an operator approaches portions of the power distribution system 100. For example, in some embodiments, the switching device 110 may be movable between a first position and a second position when the at least one circuit protection device 106 is removed from the power distribution system 100. In the exemplary embodiment, switching device 110 includes an actuation mechanism 166 and is positionable between an open position and a closed position. In alternative embodiments, power distribution system 100 includes any switching device 110 that enables power distribution system 100 to operate as described herein.
In an exemplary embodiment, the circuit protection device 106 includes a circuit breaker configured to trip and interrupt current through a circuit coupled to the circuit protection device 106. Specifically, in the exemplary embodiment, power distribution system 100 includes at least one Vacuum Circuit Breaker (VCB) 106. In alternative embodiments, power distribution system 100 includes any circuit protection device 106 that enables power distribution system 100 to operate as described herein. For example, in some embodiments, the circuit protection device 106 includes, for example and without limitation, one or more other circuit breaker devices and/or arc control devices. Exemplary circuit breaker devices include, for example and without limitation, circuit switches, contact arms, and/or circuit interrupters that interrupt current flowing through the circuit breaker device to a load coupled to the circuit breaker device. An exemplary arc control apparatus includes, for example and without limitation, a control assembly, a plurality of electrodes, a plasma gun, and a trigger circuit that causes the plasma gun to emit ablative plasma into a gap between the electrodes in order to transfer energy from an arc or other electrical fault detected on the circuit into the control assembly.
Fig. 2 is a perspective view of a portion of the power distribution system 100 including a first lock assembly 112 and a second lock assembly 113. Fig. 3 is a front perspective view of the first lock assembly 112 of the power distribution system 100. Fig. 4 is a rear perspective view of the first lock assembly 112. The first lock assembly 112 is coupled to the switching device 110 (shown in fig. 1). The first lock assembly 112 is configured to limit movement of the switching device 110 between the open and closed positions. Further, the first lock assembly 112 limits access to the actuation mechanism 166. Thus, the first lock assembly 112 prevents improper operation of the switching device 110 and prevents current flow through portions of the power distribution system 100 when an operator approaches the power distribution system 100. In alternative embodiments, switching device 110 and first lock assembly 112 have any configuration that enables power distribution system 100 to operate as described herein.
Fig. 5 is a front perspective view of a portion of the first lock assembly 112. Fig. 6 is an exploded view of a portion of the first lock assembly 112. The first lock assembly 112 includes a first lock 116, a second lock 118, a connector 120, and a guard 122. The first lock 116 defines a first keyhole or opening 124 configured to receive a key or tool (not shown) for operating the first lock 116. The second lock 118 defines a second keyhole or opening 125 configured to receive a key or tool (not shown) for operating the second lock 118. In an exemplary embodiment, the first lock 116 and the second lock 118 are positionable between an unlocked position and a locked position. In alternative embodiments, first lock assembly 112 includes any lock that enables first lock assembly 112 to operate as described herein.
Moreover, in the exemplary embodiment, first lock assembly 112 is coupled to bracket 126 and plate 129. Specifically, the first lock 116 and the second lock 118 are coupled to the plate 129. The plate 129, connector 120, and guard 122 are coupled to the bracket 126 such that the bracket 126 supports the plate 129, connector 120, and guard 122. The connector 120 and the guard 122 are arranged to move relative to the bracket 126. Bracket 126 is used to mount first lock assembly 112 within power distribution system 100. At least one of the connector 120, guard 122, bracket 126, and plate 129 defines at least one window 131 to provide a line of sight to at least one of the circuit protection device 106 and the switching device 110. In the exemplary embodiment, support plate 129 and connector 120 define a window 131 to allow an operator to determine the position of switching device 110. In alternative embodiments, first lock assembly 112 supports and/or mounts to power distribution system 100 in any manner that enables power distribution system 100 to operate as described herein.
Also, in the exemplary embodiment, first lock 116 is coupled to a first shaft 128. The first lock 116 and the first shaft 128 are configured to rotate about an axis 130 defined by the first shaft 128. The second lock 118 is coupled to the second shaft 132. The second lock 118 and the second shaft 132 are configured to rotate about an axis 134 defined through the second shaft 132. The axis 134 of the second shaft 132 is parallel to and spaced apart from the axis 130 of the first shaft 128. In the exemplary embodiment, at least a portion of first shaft 128 and second shaft 132 are rectangular cubes and are configured to engage connector 120. The first and second shafts 128, 132 extend through openings defined in the plate 129. In alternative embodiments, first lock assembly 112 includes any first shaft 128 and/or second shaft 132 that enables first lock assembly 112 to operate as described herein. For example, in some embodiments, the first shaft 128 and the second shaft 132 comprise cylindrical portions.
To operate the first lock assembly 112, an operator positions a key or tool (not shown) into the keyhole 124 of the first lock 116 or the keyhole 125 of the second lock 118 and rotates the key to move the first lock 116 or the second lock 118 between the unlocked position and the locked position. In alternative embodiments, first lock 116 and second lock 118 have any configuration that enables first lock assembly 112 to operate as described herein. For example, in some embodiments, the first lock 116 and/or the second lock 118 include members configured to move linearly and not necessarily rotate.
Moreover, in the exemplary embodiment, connector 120 is coupled to switching device 110 (shown in FIG. 2) and extends from switching device 110 to first lock 116 and second lock 118. The connector 120 includes a body 136 defining a first opening 138 configured to receive the first shaft 128 and a second opening 140 configured to receive the second shaft 132. Thus, the connector 120 couples the first lock 116 and the second lock 118 to the switching device 110. In an alternative embodiment, connector 120 is coupled to any component that enables first lock assembly 112 to operate as described herein.
In the exemplary embodiment, first opening 138 of connector 120 includes a first portion 142 and a second portion 144. The first portion 142 is defined by a curved edge and is rounded. Further, the first portion 142 is larger than the first axis 128. Thus, the first portion 142 of the first opening 138 allows the first shaft 128 to rotate relative to the connector 120. The second portion 144 is shaped to resist rotation of the first shaft 128. The second portion 144 is defined by linear edges and has a rectangular shape. In addition, the width of the second portion 144 is less than the diagonal of the rectangular portion of the first axis 128. Thus, the second portion 144 inhibits rotation of the first shaft 128 relative to the connector 120.
Moreover, in the exemplary embodiment, second opening 140 of connector 120 includes a first portion 146 and a second portion 148. The first portion 146 is shaped to allow rotation of the second shaft 132. In particular, the first portion 146 is defined by a curved edge and is circular. Further, the first portion 146 is larger than the second shaft 132. Thus, when the second shaft 132 is positioned in the first portion 146, the first portion 146 of the second opening 140 allows the second shaft 132 to rotate relative to the connector 120. The second portion 148 is shaped to inhibit rotation of the second shaft 132. The second portion 148 is defined by a linear edge and has a rectangular shape. In addition, the width of the second portion 148 is less than the diagonal of the rectangular portion of the second shaft 132. Thus, the second portion 148 of the second opening 140 inhibits rotation of the second shaft 132 relative to the connector 120. In alternative embodiments, connector 120 includes any opening that enables first lock assembly 112 to operate as described herein.
Moreover, in the exemplary embodiment, second opening 140 is a mirror image of first opening 138 about an axis 150 that extends between first opening 138 and second opening 140. In alternative embodiments, first opening 138 and second opening 140 have any configuration that enables first lock assembly 112 to operate as described herein. For example, in some embodiments, the first opening 138 is elongated in a first direction and the second opening 140 is elongated in a second direction that is different from the first direction. In further embodiments, the first opening 138 and the second opening 140 have different shapes.
Fig. 7 is a rear perspective view of a portion of the first lock assembly 112. Fig. 8 is a top view of a portion of the first lock assembly 112. In an exemplary embodiment, the connector 120 of the first lock assembly 112 is positionable between a first position and a second position. During operation of the first lock assembly 112, in the exemplary embodiment, the connector 120 moves linearly between the first position and the second position. When the connector 120 is in the first position, the first shaft 128 is received in the first portion 142 of the first opening 138 and the second shaft 132 is received in the first portion 146 of the second opening 140. When the connector 120 is in the second position, the first shaft 128 is received in the second portion 144 of the first opening 138 and the second shaft 132 is received in the second portion 148 of the second opening 140. Thus, the connector 120 provides a mutual exclusive operation of the first lock 116 and the second lock 118. For example, when the connector 120 is in the first position, the first lock 116 is allowed to move and the second lock 118 is restrained from moving. When the connector 120 is moved to the second position, the second lock 118 is allowed to move and the first lock 116 is restrained from moving. In alternative embodiments, connector 120 has any position that enables first lock assembly 112 to operate as described herein.
Moreover, in the exemplary embodiment, at least one biasing member 152 is coupled to connector 120 and biases connector 120 toward the first position. Accordingly, the connector 120 remains in the first position until a force acts on the connector 120 and overcomes the biasing force of the biasing member 152. In some embodiments, the actuation mechanism 166 is configured to move the connector 120 from the first position to the second position when the switching device 110 (shown in fig. 2) is moved to the open position. In the exemplary embodiment, first lock assembly 112 includes two springs that function as biasing members 152 for connector 120. In an alternative embodiment, first lock assembly 112 includes any biasing member 152 that enables first lock assembly 112 to operate as described herein.
Moreover, in the exemplary embodiment, guard 122 is coupled to first lock 116 by a first link 154. Guard 122 is coupled to the second lock by a second link 156. The guard 122 extends from the first lock 116 and the second lock 118 toward the actuation mechanism 166. The guard 122 is positionable between a first position (wherein the guard 122 permits access to the actuation mechanism 166) and a second position (wherein the guard 122 inhibits access to the actuation mechanism 166). In the exemplary embodiment, guard 122 is arranged to move between a first position and a second position as at least one of first lock 116 and second lock 118 moves between an unlocked position and a locked position. In alternative embodiments, guard 122 may be positioned in any manner that enables guard 122 to function as described herein.
Also, in the exemplary embodiment, guard 122 includes an L-shaped member 121 and an arm 123 coupled to L-shaped member 121. The configuration of the guard 122 facilitates coupling of the guard 122 to the first lock 116 and the second lock 118 and allows the guard 122 to extend across the actuation mechanism 166. In an alternative embodiment, first lock assembly 112 includes any guard 122 that enables first lock assembly 112 to operate as described herein.
Also, in the exemplary embodiment, shield 122 includes a first opening 158 and a second opening 160. The first opening 158 is arranged to receive the first link 154. The second opening 160 is arranged to receive the second link 156. In the exemplary embodiment, each of first link 154 and second link 156 includes a pair of arms 153 that define a gap 155. Thus, the first link 154 and the second link 156 are yoke-shaped. The gap 155 is sized to receive a portion of the guard 122. The pins 157 extend across the gaps 155 between the respective arms 153 to engage the guard 122. The first link 154 and the second link 156 are arranged to engage the guard 122 such that rotational movement of the first lock 116 or the second lock 118 is translated by the arm 153 into linear movement of the guard 122. Thus, the first lock 116 and the second lock 118 move the guard 122 between the first position and the second position. Specifically, as the first link 154 and/or the second link 156 are displaced by movement of the first lock 116 and/or the second lock 118, the first link 154 and the second link 156 contact an edge 161 of the guard 122 and cause the guard 122 to move between the first position and the second position. The biasing member 162 is coupled to the guard 122 and biases the guard 122 toward the first position and toward the first and second links 154, 156. In alternative embodiments, guard 122, first lock 116, and/or second lock 118 are coupled in any manner that enables first lock assembly 112 to operate as described herein. For example, in some embodiments, the first link 154 and/or the second link 156 are omitted and the guard 122 directly engages the first lock 116, the second lock 118, the first shaft 128, and/or the second shaft 132.
Moreover, in the exemplary embodiment, first lock assembly 112 is configured to allow shield 122 to move relative to first link 154 and second link 156. For example, the guard 122 may be manually moved between the first and second positions while the first and second locks 116, 118 remain stationary. In the exemplary embodiment, first opening 158 and second opening 160 are rectangular slots and are sized to allow guard 122 to move relative to first link 154 and second link 156. In alternative embodiments, guard 122 may be positioned in any manner that enables first lock assembly 112 to operate as described herein.
Moreover, in the exemplary embodiment, guard 122 is arranged to receive a padlock 164 (shown in FIG. 2). As a result, the guard 122 may be coupled in at least one of the first position and the second position. In the exemplary embodiment, padlock 164 is configured to maintain guard 122 in the second position. Specifically, padlock 164 couples guard 122 to a portion of power distribution system 100 adjacent to actuation mechanism 166 and prevents access to actuation mechanism 166. In alternative embodiments, guard 122 is secured in place in any manner that enables power distribution system 100 to operate as described herein. For example, in some embodiments, the guard 122 is removably coupled to a portion of the power distribution system 100 by an attachment device that includes, for example and without limitation, fasteners, clips, adhesive, hooks, and any other suitable attachment device.
Fig. 9 is a front perspective view of a portion of the second lock assembly 113 of the power distribution system 100 (shown in fig. 1). Fig. 10 is a rear perspective view of a portion of the second lock assembly 113. The circuit protection device 106 (shown in fig. 1) is positionable between a first testing position and a second operating position. The second lock assembly 113 prevents improper operation of the circuit protection device 106 and prevents current flow through portions of the power distribution system 100 when an operator approaches the power distribution system 100. In alternative embodiments, circuit protection device 106 and second lock assembly 113 have any configuration that enables power distribution system 100 to operate as described herein.
The second lock assembly 113 includes a third lock 168, a fourth lock 170, a connector 172, and a guard 174. The third lock 168 defines a first keyhole or opening 176 configured to receive a key or tool (not shown) for operating the third lock 168. The fourth lock 170 defines a second keyhole or opening 178 configured to receive a key or tool (not shown) for operating the fourth lock 170. In an exemplary embodiment, the third lock 168 and the fourth lock 170 are positionable between an unlocked position and a locked position. In alternative embodiments, second lock assembly 113 comprises any lock that enables second lock assembly 113 to operate as described herein.
Moreover, in the exemplary embodiment, second lock assembly 113 is coupled to bracket 126 (shown in FIG. 2) and plate 129. Third lock 168 and fourth lock 170 are coupled to plate 129. Plate 129, connector 172, and guard 174 are coupled to bracket 126 such that bracket 126 supports plate 129, connector 172, and guard 174. The connector 172 and the guard 174 are arranged to move relative to the bracket 126. Bracket 126 is used to mount second lock assembly 113 within power distribution system 100 (shown in fig. 1). In alternative embodiments, second lock assembly 113 is supported and/or mounted to power distribution system 100 in any manner that enables power distribution system 100 to operate as described herein.
Also, in the exemplary embodiment, third lock 168 is coupled to a third shaft 180. The third lock 168 and the third shaft 180 are configured to rotate about an axis 181 defined by the third shaft 180. The fourth lock 170 is coupled to a fourth shaft 182. The fourth lock 170 and the fourth shaft 182 are configured to rotate about an axis 183 defined by the fourth shaft 182. The axis 183 of the fourth shaft 182 is parallel to and spaced apart from the axis 181 of the third shaft 180. In the exemplary embodiment, at least a portion of third shaft 180 and fourth shaft 182 are rectangular cubes and are configured to engage connector 172. The third shaft 180 and the fourth shaft 182 extend through openings defined in the plate 129. In alternative embodiments, second lock assembly 113 includes any third shaft 180 and/or fourth shaft 182 that enables second lock assembly 113 to operate as described herein. For example, in some embodiments, the third shaft 180 and the fourth shaft 182 comprise cylindrical portions.
To operate the second lock assembly 113, an operator positions a key or tool (not shown) into the keyhole 176 of the third lock 168 or the keyhole 178 of the fourth lock 170 and rotates the key to move the third lock 168 or the fourth lock 170 between the unlocked and locked positions. In alternative embodiments, third lock 168 and fourth lock 170 have any configuration that enables second lock assembly 113 to operate as described herein. For example, in some embodiments, the third lock 168 and/or the fourth lock 170 include members configured to move linearly and not necessarily rotate.
Moreover, in the exemplary embodiment, connector 172 includes a body 186 that defines a first opening 188 configured to receive third shaft 180 and a second opening 190 configured to receive fourth shaft 182. The connector 172 is coupled to a link 185, and the link 185 is coupled to an indicator 184. Thus, the connector 172 couples the third lock 168 and the fourth lock 170 to the indicator 184 via the link 185. In alternative embodiments, connector 172 is coupled to any component that enables second lock assembly 113 to operate as described herein.
In the exemplary embodiment, first opening 188 of connector 172 includes a first portion 192 and a second portion 194. The first portion 192 is defined by a curved edge and is rounded. Further, the first portion 192 is larger than the third axis 180. Thus, the first portion 192 of the first opening 188 allows the third shaft 180 to rotate relative to the connector 172. The second portion 194 is shaped to resist rotation of the third shaft 180. The second portion 194 is defined by a linear edge and has a rectangular shape. In addition, the width of the second portion 194 is smaller than the diagonal of the rectangular portion of the third axis 180. Thus, the second portion 194 inhibits rotation of the third shaft 180 relative to the connector 172.
Moreover, in the exemplary embodiment, second opening 190 of connector 172 includes a first portion 196 and a second portion 198. The first portion 196 is shaped to allow rotation of the fourth shaft 182. In particular, the first portion 196 is defined by a curved edge and is rounded. Further, the first portion 196 is larger than the fourth shaft 182. Thus, when the fourth shaft 182 is positioned in the first portion 196, the first portion 196 of the second opening 190 allows the fourth shaft 182 to rotate relative to the connector 172. The second portion 198 is shaped to resist rotation of the fourth shaft 182. The second portion 198 is defined by linear edges and has a rectangular shape. In addition, the width of the second portion 198 is less than the diagonal of the rectangular portion of the fourth axis 182. Thus, the second portion 198 of the second opening 190 inhibits rotation of the fourth shaft 182 relative to the connector 172. In alternative embodiments, connector 172 includes any opening that enables second lock assembly 113 to operate as described herein.
Moreover, in the exemplary embodiment, second opening 190 is a mirror image of first opening 188 about an axis 191 that extends between first opening 188 and second opening 190. In alternative embodiments, first opening 188 and second opening 190 have any configuration that enables second lock assembly 113 to operate as described herein. For example, in some embodiments, the first opening 188 is elongated in a first direction and the second opening 190 is elongated in a second direction that is different from the first direction. In further embodiments, the first opening 188 and the second opening 190 have different shapes.
In an exemplary embodiment, the connector 172 of the second lock assembly 113 may be positioned between a first position and a second position. During operation of the second lock assembly 113, in the exemplary embodiment, the indicator 184 causes the connector 172 to move linearly between the first position and the second position. When the connector 172 is in the first position, the third shaft 180 is received in the first portion 192 of the first opening 188 and the fourth shaft 182 is received in the first portion 196 of the second opening 190. When the connector 172 is in the second position, the third shaft 180 is received in the second portion 194 of the first opening 188 and the fourth shaft 182 is received in the second portion 198 of the second opening 190. Thus, the connector 172 provides a mutual exclusive operation of the third lock 168 and the fourth lock 170. For example, when the connector 172 is in the first position, the third lock 168 is allowed to move and the fourth lock 170 is restrained from moving. When the connector 172 moves to the second position, the fourth lock 170 is allowed to move and the third lock 168 is restrained from moving. In alternative embodiments, connector 172 has any position that enables second lock assembly 113 to operate as described herein.
Also, in the exemplary embodiment, indicator 184 is displaced as circuit protection device 106 (shown in FIG. 2) moves between the first position and the second position. For example, in some embodiments, the indicator 184 is displaced by the cart of the power distribution system 100 as the cart and the circuit protection device 106 move between the testing position and the operational position. When the indicator 184 is displaced, the indicator 184 creates tension in the linkage 185, which causes the connector 172 to move between the first and second positions. In an alternative embodiment, power distribution system 100 (shown in FIG. 1) includes any indicators 184 that enable power distribution system 100 to operate as described herein.
Moreover, in the exemplary embodiment, at least one biasing member (not shown in FIGS. 9 and 10) is coupled to connector 172 and biases connector 172 toward the first position. Thus, the connector 172 remains in the first position until a force acts on the connector 172 and overcomes the biasing force of the biasing member. In alternative embodiments, second lock assembly 113 includes any biasing component that enables second lock assembly 113 to operate as described herein.
Moreover, in the exemplary embodiment, guard 174 is coupled to third lock 168 by a first link 202. The guard 174 is coupled to the second lock by a second link 204. The guard 174 extends from the third lock 168 and the fourth lock 170 toward an actuation mechanism (not shown in fig. 9 and 10) of the circuit protection device 106 (shown in fig. 1). The guard 174 may be positioned between a first position and a second position. In the exemplary embodiment, guard 174 is arranged to move between a first position and a second position as at least one of third lock 168 and fourth lock 170 moves between an unlocked position and a locked position. In alternative embodiments, guard 174 may be positioned in any manner that enables guard 174 to function as described herein.
Also, in the exemplary embodiment, guard 174 includes an L-shaped member 206 and an arm 208 coupled to L-shaped member 206. The configuration of the guard 174 facilitates coupling of the guard 174 to the third lock 168 and the fourth lock 170. In an alternative embodiment, second lock assembly 113 includes any guard 174 that enables second lock assembly 113 to operate as described herein.
Moreover, in the exemplary embodiment, shield 174 includes a first opening 210 and a second opening 212. The first opening 210 is arranged to receive the first linkage 202. The second opening 212 is arranged to receive the second link 204. In the exemplary embodiment, each of first link 202 and second link 204 includes a pair of arms 214 that define a gap 216. Thus, the first link 202 and the second link 204 are yoke-shaped. Gap 216 is sized to receive a portion of guard 174. Pins 218 extend across gaps 216 between respective arms 214 to engage guards 174. The first and second links 202, 204 are arranged to engage the guard 174 such that rotational movement of the third or fourth lock 168, 170 is translated by the arm 214 into linear movement of the guard 174. Thus, third lock 168 and fourth lock 170 move guard 174 between the first position and the second position. Specifically, as first link 202 and/or second link 204 are displaced by movement of third lock 168 and/or fourth lock 170, first link 202 and second link 204 contact edge 219 of guard 174 and cause guard 174 to move between the first and second positions. In alternative embodiments, guard 174, third lock 168, and/or fourth lock 170 are coupled in any manner that enables second lock assembly 113 to operate as described herein. For example, in some embodiments, the first link 202 and/or the second link 204 are omitted and the guard 174 directly engages the third lock 168, the fourth lock 170, the third shaft 180, and/or the fourth shaft 182.
Moreover, in the exemplary embodiment, second lock assembly 113 is configured to allow movement of shield 174 relative to first link 202 and second link 204. For example, the guard 174 may be manually moved between the first and second positions while the third and fourth locks 168, 170 remain stationary. In the exemplary embodiment, first opening 210 and second opening 212 are rectangular slots and are sized to allow movement of shield 174 relative to first link 202 and second link 204. In alternative embodiments, guard 174 may be positioned in any manner that enables second lock assembly 113 to operate as described herein.
The embodiment of the power distribution system described above includes a plurality of lock assemblies. A first lock assembly of the plurality of lock assemblies includes a guard that restricts access to a switching device of the power distribution system. A second lock assembly of the plurality of lock assemblies includes an indicator that indicates a position of the circuit protection device and restricts access to the circuit protection device when the indicator indicates that the circuit protection device is in the second position. Each lock assembly includes a lock coupled to the connector. The connector provides exclusive operation of the locks within the respective lock assemblies. Further, the lock assembly prevents insertion of a tool when the respective lock is in the locked position.
Exemplary technical effects of the methods, systems, and apparatus described herein include at least one of: (a) Restricting access to components of the power distribution system when the lock assembly is in the locked position; (b) preventing an operator from overriding a lock assembly of the power distribution system; (c) Providing a lock connected by a connector allowing exclusive operation of the lock; (d) Providing an indication of the position of the switching device to an operator; and (e) effecting isolation of circuit protection devices of the power distribution system to allow secure access to the power distribution system.
Exemplary embodiments of power distribution systems are described in detail above. The power distribution system is not limited to the specific embodiments described herein, but rather, components and operations of the power distribution system may be utilized independently and separately from other components and/or operations described herein. Furthermore, the described components and/or operations may also be defined in, or used in combination with, other systems, methods, and/or apparatus, and are not limited to practice with only the power distribution systems and devices described herein.
The order of implementation and execution of the operations in the embodiments of the disclosure illustrated and described herein is not essential, unless otherwise specified. That is, operations may be performed in any order, unless otherwise indicated, and embodiments of the disclosure may include additional or fewer operations than those disclosed herein. For example, it is contemplated that implementing or performing a particular operation before, contemporaneously with, or after another operation is within the scope of aspects of the disclosure.
Although specific features of various embodiments of the disclosure may be shown in some drawings and not in others, this is for convenience only. Any feature of the figures may be referenced and/or claimed in combination with any feature of any other figures in accordance with the principles of the present disclosure.
This written description uses examples to disclose the disclosure, including the best mode, and also to enable any person skilled in the art to practice the disclosure, including making and using any devices and systems and performing any incorporated methods. The patentable scope of the disclosure is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal languages of the claims.
Claims (20)
1. A power distribution system, comprising:
a circuit protection device arranged to interrupt current flowing through the circuit, wherein the circuit protection device is positionable between a circuit protection device first position and a circuit protection device second position;
A switching device coupled to the circuit protection device, wherein the switching device is positionable between a switching device first position and a switching device second position, the switching device including an actuation mechanism;
a first lock assembly coupled to the switching device, the first lock assembly comprising:
a first lock rotatable about a first axis;
a second lock rotatable about a second axis;
a first connector coupled to the switching device, the first connector extending from the switching device to the first lock and the second lock, wherein the first connector is arranged to prevent rotation of the first lock when the switching device is in the switching device first position, and wherein the first connector is arranged to prevent rotation of the second lock when the switching device is in the switching device second position; and
a second lock assembly, comprising:
an indicator arranged to indicate the position of the circuit protection device;
a third lock rotatable about a third axis;
a fourth lock rotatable about a fourth axis; and
a second connector coupled to the indicator, wherein the second connector is arranged to prevent rotation of the third lock when the circuit protection device is in the circuit protection device first position, and wherein the second connector is arranged to prevent rotation of the fourth lock when the circuit protection device is in the circuit protection device second position.
2. The electrical distribution system of claim 1, wherein the first lock is coupled to a first shaft, and wherein the second lock is coupled to a second shaft.
3. The electrical distribution system of claim 2, wherein the first connector comprises a body defining a first opening arranged to receive the first shaft, the first opening including a first portion shaped to allow rotation of the first shaft and a second portion shaped to prevent rotation of the first shaft.
4. The power distribution system of claim 3 wherein the first axis comprises a cube portion.
5. The power distribution system of claim 4, wherein the first portion is defined by a curved edge and the second portion is defined by a linear edge.
6. The electrical distribution system of claim 3, wherein the body further defines a second opening arranged to receive the second shaft, the second opening including a first portion shaped to allow rotation of the second shaft and a second portion shaped to prevent rotation of the second shaft.
7. The electrical distribution system of claim 6, wherein the first connector is positionable between a first connector first position in which the first shaft is received in the first open first portion and the second shaft is received in the second open second portion, and a first connector second position in which the first shaft is received in the first open second portion and the second shaft is received in the second open first portion.
8. The electrical distribution system of claim 1, wherein the third lock is coupled to a third shaft, and wherein the fourth lock is coupled to a fourth shaft.
9. The electrical distribution system of claim 8, wherein the second connector comprises a body defining a first opening arranged to receive the third shaft, the first opening comprising a first portion shaped to allow rotation of the third shaft and a second portion shaped to prevent rotation of the third shaft.
10. The electrical distribution system of claim 9, wherein the third axis comprises a cube portion.
11. The electrical distribution system of claim 10, wherein the first portion is defined by a curved edge and the second portion is defined by a linear edge.
12. The electrical distribution system of claim 9, wherein the body further defines a second opening arranged to receive the fourth shaft, the second opening including a first portion shaped to allow rotation of the fourth shaft and a second portion shaped to prevent rotation of the fourth shaft.
13. The electrical distribution system of claim 12, wherein the second connector is positionable between a second connector first position in which the third shaft is received in the first open first portion and the fourth shaft is received in the second open second portion, and a second connector second position in which the third shaft is received in the first open second portion and the fourth shaft is received in the second open first portion.
14. The electrical distribution system of claim 1, wherein the first lock assembly comprises a support plate, and wherein at least one of the support plate and the first connector define a window providing a line of sight to the switching device.
15. A lock assembly for a circuit protection device of a power distribution system, the lock assembly comprising:
an indicator arranged to indicate the position of the circuit protection device;
a first lock rotatable about a first axis;
a second lock rotatable about a second axis; and
a connector coupled to the first lock and the second lock, wherein the indicator is coupled to the connector and arranged to cause the connector to move between a connector first position and a connector second position, wherein the connector is arranged to prevent rotation of the first lock when the connector is in the connector first position, and wherein the connector is arranged to prevent rotation of the second lock when the connector is in the connector second position.
16. The lock assembly of claim 15, wherein the first lock is coupled to a first shaft, and wherein the second lock is coupled to a second shaft.
17. The lock assembly of claim 16, wherein the connector includes a body defining a first opening arranged to receive the first shaft, the first opening including a first portion shaped to allow rotation of the first shaft and a second portion shaped to prevent rotation of the first shaft.
18. The lock assembly of claim 17, wherein the first shaft includes a cube portion, and wherein the first portion is defined by a curved edge and the second portion is defined by a linear edge.
19. The lock assembly of claim 18, wherein the body further defines a second opening arranged to receive the second shaft, the second opening including a first portion shaped to allow rotation of the second shaft and a second portion shaped to prevent rotation of the second shaft.
20. The lock assembly of claim 19, wherein the first shaft is received in a first open first portion and the second shaft is received in a second open second portion when the connector is in the connector first position, and wherein the first shaft is received in a first open second portion and the second shaft is received in a second open first portion when the connector is in the connector second position.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078788.6A CN110085463B (en) | 2018-01-26 | 2018-01-26 | Lock assembly for components of an electrical distribution system |
| PCT/CN2019/073464 WO2019144960A1 (en) | 2018-01-26 | 2019-01-28 | Lock assemblies for components of electrical power distribution systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810078788.6A CN110085463B (en) | 2018-01-26 | 2018-01-26 | Lock assembly for components of an electrical distribution system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110085463A CN110085463A (en) | 2019-08-02 |
| CN110085463B true CN110085463B (en) | 2023-08-01 |
Family
ID=67395943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810078788.6A Active CN110085463B (en) | 2018-01-26 | 2018-01-26 | Lock assembly for components of an electrical distribution system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110085463B (en) |
| WO (1) | WO2019144960A1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2650891A1 (en) * | 2012-04-10 | 2013-10-16 | Schneider Electric Industries SAS | Control device for a medium-voltage electric protection apparatus comprising an interlock device and electric protection apparatus comprising same |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10214890C1 (en) * | 2002-04-04 | 2003-05-08 | Moeller Gmbh | Remotely-operated breaker with switch setting indicator, protection function has transfer rod linked to indication lever and to switch rod of auxiliary switch for tapping shaft position |
| US7847203B2 (en) * | 2008-04-15 | 2010-12-07 | General Electric Company | System and method for indicating a position of an electrical distribution device |
| US7834724B2 (en) * | 2008-04-15 | 2010-11-16 | General Electric Company | Electromechanical interlock for electrical protection devices |
| US8217291B2 (en) * | 2010-03-04 | 2012-07-10 | Eaton Corporation | Electrical switching apparatus and status indicating assembly therefor |
| US8395063B2 (en) * | 2010-12-29 | 2013-03-12 | General Electric Company | Locking device for use with a circuit breaker and method of assembly |
| ES2602752T3 (en) * | 2011-06-22 | 2017-02-22 | Abb S.P.A. | Switching device and relative power distribution system |
| KR101212213B1 (en) * | 2011-07-15 | 2012-12-13 | 엘에스산전 주식회사 | Apparatus of modular trip mechanism and accessory mechanism for circuit breaker |
| AU2014100036B4 (en) * | 2013-01-03 | 2014-08-21 | Legrand Australia Pty Ltd | Lock fitting for a circuit protection device |
| FR3048119B1 (en) * | 2016-02-19 | 2018-03-30 | Schneider Electric Industries Sas | ROTARY CONTROL SYSTEM FOR AN APPARATUS |
| CN109256289B (en) * | 2017-07-14 | 2022-04-29 | Abb瑞士股份有限公司 | Lock assembly for switchgear of an electric power distribution system |
-
2018
- 2018-01-26 CN CN201810078788.6A patent/CN110085463B/en active Active
-
2019
- 2019-01-28 WO PCT/CN2019/073464 patent/WO2019144960A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2650891A1 (en) * | 2012-04-10 | 2013-10-16 | Schneider Electric Industries SAS | Control device for a medium-voltage electric protection apparatus comprising an interlock device and electric protection apparatus comprising same |
| CN103367055A (en) * | 2012-04-10 | 2013-10-23 | 施耐德电器工业公司 | Control device for electric protection apparatus and electric protection apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019144960A1 (en) | 2019-08-01 |
| CN110085463A (en) | 2019-08-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10734171B2 (en) | Lock assemblies for switch devices of electrical power distribution systems | |
| US8748760B2 (en) | Linear actuating earthing switch | |
| US8288669B2 (en) | Electric switchgear | |
| JP5890639B2 (en) | System and device for circuit protection in equipment housing | |
| US9875868B2 (en) | Locking device for high-voltage switchgear | |
| EP3109881B1 (en) | Locking device for operating mechanism of gas insulated switchgear | |
| CN110085463B (en) | Lock assembly for components of an electrical distribution system | |
| CN102683088B (en) | Earthing switch | |
| EP3196908B1 (en) | Interlock apparatus of ring main unit | |
| US9595408B2 (en) | Electrical system and operating handle interface assembly therefor | |
| US3991348A (en) | Apparatus for controlling access to high voltage metal-enclosed switchgear | |
| CN111029959A (en) | Lock assembly for components of an electrical distribution system | |
| EP3913648B1 (en) | Apparatus for operating electric switching device | |
| EP2571121B1 (en) | Withdrawable unit with rotating electrical contacts | |
| AU2016306698B2 (en) | Circuit breaker racking system | |
| CN216980424U (en) | Locking device for preventing protection unit from being grounded and protection unit | |
| KR20180069579A (en) | Earthing Switch of Distribution Board | |
| US8076600B2 (en) | Contact actuating mechanism for switching device | |
| US10541520B1 (en) | Interlock system for an electrical installation | |
| WO2019161519A1 (en) | Switch device for electrical power distribution systems | |
| KR102547151B1 (en) | Driving Shaft Locking Device for Disconnector | |
| US20240021384A1 (en) | Power connection for safe energizing of a power unit in a motor control center | |
| US9741512B2 (en) | Switchgear system, and electrical switching apparatus assembly and maintaining method therefor | |
| CN115483565A (en) | Bus tapping unit | |
| NZ739783B2 (en) | Circuit breaker racking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200508 Address after: Baden, Switzerland Applicant after: ABB Switzerland Co.,Ltd. Address before: American Georgia Applicant before: INDUSTRIAL CONNECTIONS & SOLUTIONS LLC |
|
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |