Anti-interference electricity drawer assembly
By using an anti-sway device in the low-voltage distribution cabinet to switch the AC contactor coil to a DC holding state, the unreliable holding problem of the AC contactor during power swings is solved, and continuous operation of the equipment and stable production are achieved.
Patent Information
- Application Number
- CN202422413073.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-08
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-10-08
AI Technical Summary
The ordinary coil AC contactors in the existing low-voltage distribution cabinet drawer components cannot be reliably maintained during power fluctuations, causing equipment shutdown, resulting in production interruptions and economic losses for enterprises.
The anti-sway device switches the AC contactor coil to the DC holding state, and determines whether the AC voltage has returned to normal after the power swing delay, and automatically switches back to the AC operation state to ensure the reliable attraction of the contactor and avoid abnormal release.
When the power grid fluctuates, it prevents abnormal release of the contactor, ensures continuous operation of the equipment, avoids production interruptions, and protects the continuity of enterprise production.
Smart Images
Figure CN223390995U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electrical equipment, in particular to an anti-electrical shaking drawer component. Background Art
[0002] Currently, conventional coil AC contactors in low-voltage distribution cabinet drawer assemblies cannot reliably maintain voltage when the power grid experiences a power surge, causing the voltage to suddenly drop to 0V or below 180V. This can lead to abnormal release of contactors in the low-voltage power supply circuit, causing pumps to stop, leading to large and critical equipment trips and unplanned downtime. For continuous production companies, large equipment tripping and shutdowns, which could cause production interruptions, are not acceptable due to process constraints.
[0003] Therefore, there is an urgent need for an anti-electrical shaking drawer assembly to solve the problem that when the ordinary coil AC contactor in the current low-voltage distribution cabinet drawer assembly shakes, it will cause the equipment in the enterprise to shut down, thereby causing economic damage to the enterprise. Utility Model Content
[0004] The utility model provides a drawer assembly with anti-electrical shaking function, which solves the problem that when an ordinary coil AC contactor in the drawer assembly of the existing low-voltage distribution cabinet experiences electric shaking, it will cause equipment in the enterprise to stop, thereby causing economic damage to the enterprise.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A drawer assembly for preventing electric shaking, comprising:
[0007] A drawer cabinet is provided with an anti-electrical sway device, a circuit breaker, an intermediate relay, and an AC contactor. The anti-electrical sway device has 1 / 2 terminals, 14 / 13 terminals, and 16 / 15 terminals. The AC contactor has A1 / A2 terminals. The 16 / 15 terminals of the anti-electrical sway device are connected to the A1 / A2 terminals of the AC contactor. The 1 / 2 terminals of the anti-electrical sway device are connected to the A1 / A2 terminals of the AC contactor. The 14 / 13 terminals of the anti-electrical sway device are connected to the DCS system.
[0008] Furthermore, a partition plate is provided in the drawer cabinet, and through holes for wires to pass through are distributed on the partition plate, and the partition plate divides the drawer cabinet into a first accommodating cavity and a second accommodating cavity.
[0009] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:
[0010] In actual operation, if the AC contactor of the low-voltage drawer assembly experiences a power grid power surge, the anti-power surge device switches the contactor coil from AC to DC to maintain operation. Maintaining the DC voltage, the contactor coil maintains the main and auxiliary contacts closed. After the power surge delay expires, the anti-power surge device determines whether the AC voltage has returned to normal (above 185V). If so, the device automatically switches to AC operation. Once the voltage is restored, the motor continues to run, preventing major or critical chain trips caused by abnormal contactor release, which could disrupt production. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural diagram of the present utility model.
[0012] Markings and parts names in the figure:
[0013] 1- drawer cabinet, 2- anti-electrical shaking device, 3- circuit breaker, 4- intermediate relay, 5- AC contactor, 6- partition plate, 7- first accommodating chamber, 8- second accommodating chamber. DETAILED DESCRIPTION
[0014] The present invention will be described in detail below with reference to the accompanying drawings.
[0015] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.
[0016] This embodiment provides a drawer assembly that prevents electrical shaking, such as Figure 1 Shown, including:
[0017] Drawer cabinet 1 is equipped with an anti-sway device 2, a circuit breaker 3, an intermediate relay 4, and an AC contactor 5. The anti-sway device 2 has terminals 1 / 2, 14 / 13, and 16 / 15. The AC contactor 5 has terminals A1 / A2. Terminals 16 / 15 of the anti-sway device 2 are connected to terminals A1 / A2 of the AC contactor 5. Terminals 1 / 2 of the anti-sway device 2 are connected to terminals A1 / A2 of the AC contactor 5. Terminals 14 / 13 of the anti-sway device 2 are connected to the DCS system. The DCS system displays the real-time status of the anti-sway device.
[0018] The above embodiment is further optimized. A partition plate 6 is provided in the drawer cabinet 1 . Through holes for wires to pass through are distributed on the partition plate 6 . The partition plate 6 divides the drawer cabinet 1 into a first accommodating cavity 7 and a second accommodating cavity 8 .
[0019] During actual operation, when the AC contactor 5 of the low-voltage drawer assembly experiences power shaking in the power grid, the anti-power shaking device 2 switches the AC contactor 5 coil from AC to DC holding state. Under the maintenance of DC voltage, the main contacts and auxiliary contacts of the AC contactor 5 coil continue to be attracted. After the power shaking delay time expires, the anti-power shaking device 2 determines whether the AC voltage has returned to normal (above 185V). If it has recovered, the device automatically switches to the AC operation state. The voltage recovery motor will run continuously, and will not cause large and critical chain jumps due to abnormal release of the AC contactor 5, resulting in interruption of enterprise production. During normal operation, the anti-power shaking device 2 detects the AC current of the AC contactor 5 circuit in real time, adjusts the resistance of the AC contactor 5 coil to a fixed value, and automatically adjusts the output DC holding voltage to ensure that the current is equal in the AC operation and DC holding conditions, and the magnetic fields generated are consistent, the attraction force is also equal, and the coil heat is the same, so it can be reliably attracted without affecting the life of the contactor.
[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A drawer assembly for preventing power shaking, characterized in that: include: A drawer cabinet (1) is provided with an anti-electrical sway device (2), a circuit breaker (3), an intermediate relay (4) and an AC contactor (5); the anti-electrical sway device (2) has a 1 / 2 terminal, a 14 / 13 terminal and a 16 / 15 terminal; the AC contactor (5) has an A1 / A2 terminal; the 16 / 15 terminal of the anti-electrical sway device (2) is connected to the A1 / A2 terminal of the AC contactor (5); the 1 / 2 terminal of the anti-electrical sway device (2) is connected to the A1 / A2 terminal of the AC contactor (5); and the 14 / 13 terminal of the anti-electrical sway device (2) is connected to a DCS system.
2. The anti-electrical shaking drawer assembly according to claim 1, characterized in that: The drawer cabinet (1) is provided with a partition plate (6), and through holes for wires to pass through are distributed on the partition plate (6). The partition plate (6) divides the drawer cabinet (1) into a first accommodating chamber (7) and a second accommodating chamber (8). The anti-electrical shaking device (2), the circuit breaker (3) and the AC contactor (5) are located in the first accommodating chamber (7), and the intermediate relay (4) is located in the second accommodating chamber (8).