CN109378232B - Mechanical forced starting device applied to star-delta voltage reduction starting of fire pump - Google Patents
Mechanical forced starting device applied to star-delta voltage reduction starting of fire pump Download PDFInfo
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- CN109378232B CN109378232B CN201811322497.3A CN201811322497A CN109378232B CN 109378232 B CN109378232 B CN 109378232B CN 201811322497 A CN201811322497 A CN 201811322497A CN 109378232 B CN109378232 B CN 109378232B
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- rod body
- sliding block
- circuit breaker
- star
- fire pump
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- 230000009467 reduction Effects 0.000 title claims abstract description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 230000007547 defect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 15
- 238000004804 winding Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1009—Interconnected mechanisms
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
- Mechanisms For Operating Contacts (AREA)
Abstract
The invention provides a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump, which comprises a first circuit breaker, a second circuit breaker and an operating mechanism, wherein the first circuit breaker is provided with a first sliding block component which drives the switching-on or switching-off of the first circuit breaker; the operating mechanism comprises a first rod body and a second rod body, the first rod body and the second rod body are both rotatably connected to the rotating shaft, the first rod body is fixedly connected with the first sliding block assembly at the same time, and the second rod body is fixedly connected with the second sliding block assembly at the same time. Compared with the prior art, the invention effectively overcomes the defect that the motor cannot be started due to power failure or control loop failure of the control loop in the contactor scheme.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump.
Background
The dual power supply device is generally composed of two circuit breakers, and the conventional situation of the dual power supply device is that the two circuit breakers are electrically interlocked. At present, a Y-delta starting circuit is formed in a conventional three-contactor combined mode in the market; the basic principle is that: when the motor is started, a Y-shaped wiring mode is adopted, so that the motor is started in a step-down mode, and the load of the system is reduced to prevent overload; after the Y-type starting of the motor is completed, the motor is switched to a delta-type wiring mode, and the motor runs normally. Therefore, the motor and a circuit system are effectively protected, current overload is prevented, and the motor and the circuit system are not easy to burn.
Star-delta voltage reduction starting is realized by changing the connection method of a motor winding. When the motor is started, a main contactor supplies power to three head ends of the motor in the triangle connection mode, and a star point contactor closes three tail ends of the motor in the triangle connection mode. The windings become star connected and after start-up, the star point contactor disconnects the running contactor to power the motor to the three tails. The windings become delta-connected. The motor is operated at full pressure. The whole starting process is commanded to be completed by a time relay. The star point contactor and the run contactor must be interlocked.
The above-described solution currently used must add a control loop to control the three contactor actuation sequences. If the control loop is powered off, the Y-delta starting function cannot be realized by the scheme, and the motor cannot normally run.
Disclosure of Invention
In view of the above, the invention provides a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump, which comprises a first circuit breaker, a second circuit breaker and an operating mechanism, wherein the first circuit breaker is provided with a first sliding block component which drives the switching-on or switching-off of the first circuit breaker, the second circuit breaker is provided with a second sliding block component which drives the switching-on or switching-off of the second circuit breaker;
the operating mechanism comprises a first rod body and a second rod body, the first rod body and the second rod body are both rotatably connected to the rotating shaft, the first rod body is fixedly connected with the first sliding block assembly at the same time, and the second rod body is fixedly connected with the second sliding block assembly at the same time;
the end part of the first rod body is provided with a control part, the rotating shaft penetrates through the control part, the edge of the control part is provided with a first guide surface, one end of the first guide surface is provided with a notch part, the control part is also connected with a first stop block, the first stop block is positioned at the other end of the first guide surface relative to the notch part, and the first stop block blocks the second rod body from the first side surface of the second rod body;
the rotating shaft is also sleeved with a swing arm, a sliding space is formed in the swing arm, a sliding block is arranged in the sliding space, the sliding block is rotatably connected to the second rod body and is overlapped with the second rod body, the sliding block is connected with the rotating shaft through an elastic part, the sliding block is provided with a guide part extending to the surface of the second rod body, the swing arm is also connected with a second stop block, the second stop block blocks the second rod body from the second side surface of the second rod body, and the second side surface is opposite to the first side surface;
the second rod body is provided with a second guide surface, and the guide part is in guide fit with the second guide surface.
Further, the first sliding block assembly pushes the first handle of the first circuit breaker, and the first handle drives the switching-on or switching-off of the first circuit breaker.
Further, the second slider assembly pushes the second handle of the second circuit breaker, and the second handle drives the second circuit breaker to close or open.
Further, the control component is a circular plate body, and the first guide surface is an arc-shaped guide surface on the edge of the control component.
Further, the sliding block is a kidney-shaped block, the sliding space is a kidney-shaped hole, the length of the sliding space is larger than that of the sliding block, and the notch part is an arc notch matched with the shape of the end part of the sliding block.
Further, the swing arm is a sector plate body.
Further, the second guiding surface is an inclined surface.
Further, the guide member is a cylinder.
Further, the surface of the second rod body is provided with a bump, the bump is arranged along the first side face, the free end of the bump extends towards the free end of the second rod body, the free end of the bump is connected with a convex rib traversing the surface of the second rod body, and a second guide surface is formed on the outer side of the convex rib.
Further, the bottom of the sliding block is provided with a mounting base block, and the mounting base block is rotatably arranged in an area surrounded by the protruding block and the protruding rib.
Compared with the prior art, the mechanical forced starting device applied to star-delta voltage reduction starting of the fire pump and the electrical control loop without contactors and the like adopts the pure mechanical manual starting scheme, and the defect that a motor cannot be started due to power failure or control loop failure of the control loop in the contactor scheme is effectively overcome.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
fig. 1A is a schematic structural diagram of an operating device of a mechanical forced starting device applied to star-delta step-down starting of a fire pump in an initial state according to an embodiment of the present invention;
fig. 1B is a schematic structural diagram of an operation device (without a swing arm) of a mechanical forced starting device applied to a star-delta step-down starting of a fire pump in an initial state according to an embodiment of the present invention;
fig. 1C is a schematic structural diagram of a swing arm of an operating device of a mechanical forced starting device applied to a star-delta step-down starting of a fire pump in an initial state according to an embodiment of the present invention;
fig. 2A is a schematic structural diagram of an operation device of a mechanical forced starting device applied to star-delta step-down starting of a fire pump under an axial angle according to an embodiment of the present invention;
fig. 2B is a schematic structural diagram of a swing arm of an operating device of a mechanical forced starting device applied to a star-delta step-down starting of a fire pump under an axial angle in accordance with an embodiment of the present invention;
fig. 2C is a schematic structural diagram of an operation device (without a swing arm) of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump according to an embodiment of the present invention at an axial angle;
fig. 3 is a schematic structural view of a first rod of an operating device of a mechanical forced starting device applied to a star-delta step-down starting of a fire pump according to an embodiment of the present invention;
fig. 4A is a schematic structural diagram of an operation device of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump in a first state according to an embodiment of the present invention;
fig. 4B is a schematic structural diagram of an operation device (without a swing arm) of a mechanical forced starting device applied to a star-delta step-down starting of a fire pump in a first state according to an embodiment of the present invention;
fig. 5A is a schematic structural diagram of an operating device of a mechanical forced starting device applied to star-delta step-down starting of a fire pump in a second state according to an embodiment of the present invention;
fig. 5B is a schematic structural diagram of an operation device (without a swing arm) of a mechanical forced starting device applied to a star-delta step-down starting of a fire pump in a second state according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump in an initial state according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump in a Y-shaped state according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump in a delta state according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump in transition of an initial state according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a mechanical forced starting device applied to star-delta voltage reduction starting of a fire pump in a recovery initial state according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
Referring to fig. 1A to 10, a mechanical forced starting device applied to star delta voltage reduction starting of a fire pump provided by the embodiment of the invention is shown, and the mechanical forced starting device comprises a first circuit breaker 5, a second circuit breaker 6 and an operating mechanism, wherein a first sliding block assembly 51 is arranged on the first circuit breaker 5, the first sliding block assembly 51 drives the first circuit breaker 5 to close or open, a second sliding block assembly 61 is arranged on the second circuit breaker 6, and the second sliding block assembly 61 drives the second circuit breaker 6 to close or open. Specifically, the first slider assembly 51 pushes the first handle of the first circuit breaker 5, and the first handle drives the first circuit breaker 5 to close or open; the second slider assembly 61 pushes the second handle of the second circuit breaker 6, which drives the closing or opening of the second circuit breaker 6.
Referring to fig. 1A to 5B, the operating mechanism includes a first rod 1 and a second rod 2, the first rod 1 and the second rod 2 are both rotatably connected to the rotating shaft 3, the first rod 1 is fixedly connected to the first slider assembly 51, and the second rod 2 is fixedly connected to the second slider assembly 61.
With continued reference to fig. 1A to 5B, the end of the first rod body 1 is provided with a control component 11, the rotating shaft 3 passes through the control component 11, the edge of the control component 11 is provided with a first guiding surface 12, one end of the first guiding surface 12 is provided with a notch 13, the control component 11 is also connected with a first stop block 14, the first stop block 14 is positioned at the other end of the first guiding surface 12 relative to the notch 13, and the first stop block 14 stops the second rod body 2 from a first side surface 21 of the second rod body 2. The control component 11 may be a circular plate body, and the first guiding surface 12 is an arc guiding surface, so that the whole control component is convenient to turn along with the first rod body, and an arc first guiding surface with a longer stroke is formed.
With continued reference to fig. 1A to 5B, the rotating shaft 3 is further sleeved with a swing arm 4, the swing arm 4 is provided with a sliding space 41, a slidable slider 42 is arranged in the sliding space 41, the slider 42 is rotatably connected to the second rod body 2, the slider 42 and the second rod body 2 are overlapped, the slider 42 is connected with the rotating shaft 3 through an elastic component 43 (specifically, a spring) and provided with a guide component 422 extending to the surface of the second rod body 2, the swing arm 4 is further connected with a second stop block 44, the second stop block 44 blocks the second rod body 2 from the second side surface 22 of the second rod body 2, and the second side surface 22 is opposite to the first side surface 21.
In a specific implementation, the slider 42 may be a kidney-shaped block, the sliding space 41 is a kidney-shaped hole, the length of the sliding space 41 is greater than the length of the slider 42, and the notch 13 may be an arc notch matching the shape of the end of the slider 42. Meanwhile, the swing arm 4 can be a sector plate body, and can be convenient for swinging.
With continued reference to fig. 1A to 5B, the second rod body 2 is provided with a second guiding surface 23, and the guiding member 422 is in guiding engagement with the second guiding surface 23, where the second guiding surface 23 may be specifically an inclined surface, and the guiding member 422 may be specifically a cylinder, and may form guiding engagement along the inclined surface.
With continued reference to fig. 1A to 5B, the surface of the second rod body 2 is provided with a bump 24, the bump 24 is arranged along the first side surface 21, a bump free end 241 of the bump 24 extends towards the free end direction of the second rod body 2, the bump free end 241 is connected with a protruding rib 25 traversing the surface of the second rod body 2, and the outer side of the protruding rib 25 forms the second guiding surface 23; the bottom of the slider 42 has a mounting base 421, and the mounting base 421 is rotatably mounted in an area surrounded by the projection 24 and the rib 25. By the arrangement of the structure, the installation of the sliding block and other parts can be stably realized in a limited space.
Fig. 1A-1C show the device in an initial state, with one circuit breaker in a tripped state and the other circuit breaker in a tripped state. At this time, the entire electric unit is in an open state.
When the initial state is switched to the first state, the shaft body shown in fig. 2A-2B is rotated clockwise to drive the swing arm 4. The sliding block 42 is nested in the swing arm 4, one end of the sliding block 42 is connected with the elastic component 43, and the other end of the elastic component 43 is connected to the rotating handle. When the swing arm 4 rotates clockwise, the slider 42 moves toward the direction of the rotating handle under the tensile force of the elastic member 43. With the first guide surface 12, a clockwise tangential movement is performed with the first guide surface 12. The first rod body 1 is provided with a notch 13. The slider 42 snaps into the notch portion 13 when moving clockwise. The sliding block 42 drives the first rod body 1 to continue to move clockwise. The first rod body 1 is provided with a first stop block 14. When the first rod 1 moves clockwise, the first stop block 14 drives the second rod 2. That is, the rotating handle drives the swing arm 4, the swing arm 4 drives the sliding block 42, the sliding block 42 drives the first rod body 1, and the first stop block 14 drives the second rod body 2. The parts move clockwise until they reach the first state shown in figures 3, 4A and 4B. At this time, the breaker in the open state is switched from open to closed, and the breaker in the tripped state is switched to the rebuckled state. And a short circuit module is arranged in the rebuckled circuit breaker, and the rebuckled state is a short circuit state. The whole electrical unit is in a Y-connection state.
When the first state of fig. 4A-4B is changed to the second state of fig. 5A-5B, the counterclockwise rotation shaft (handle part) is rotated, the slider 42 and the first rod 1 are still in the clamped state, and the counterclockwise rotation handle drives the first rod 1 to rotate counterclockwise. The motion drives the short circuit breaker to switch into a closing state. The second rod body 2 and the first rod body 1 are assembled in a concentric sliding way, and no external force acts. At this time, both the circuit breakers are in a closing state, and the whole electric unit is in triangular connection.
The rotation shaft body continues to move anticlockwise, the second rod body 2 is provided with a second guide surface 23, the sliding block 42 is provided with a guide part 422, the guide part 422 moves onto the second guide surface 23, the sliding block 42 overcomes the spring force and moves tangentially with the second guide surface 23, the sliding block 42 is separated from the notch part 13, the first rod body 1 does not move anticlockwise along with the rotation handle any more, the swing arm 4 continues to rotate anticlockwise, the swing arm 4 is provided with a second stop block 44, and the second stop block 44 rotates anticlockwise until being attached to the second rod body 2. The second rod body 2 is driven to move anticlockwise until a circuit breaker is switched from switching on to switching off. Meanwhile, the swing arm 4 presses a tripping button of another circuit breaker to enable the circuit breaker to be switched from switching-on to tripping. At this time, the whole electrical unit is in the open state, and the electrical unit is restored to the original state.
Referring to fig. 6, in the initial state, both circuit breakers are in the open state and all electrical circuits are open.
Referring to fig. 7, the operating mechanism is rotated clockwise. The first rod body 1 pushes the first sliding block assembly 51, the first sliding block assembly 51 pushes the handle of the first circuit breaker 5, and the first circuit breaker 5 is switched to a closing state; meanwhile, the second rod body 2 pushes the second slider assembly 61, the second slider assembly 61 pushes the handle of the second circuit breaker 6, the second circuit breaker 6 is converted into a short circuit state as shown in fig. 7, and the whole electric circuit is in a Y-shaped state.
Referring to fig. 8, the operating mechanism is rotated counterclockwise. At this time, the first rod body 1 and the first slider assembly 51 remain stationary, i.e., the first circuit breaker 5 remains in the closed state. The second rod body 2 rotates anticlockwise to push the second sliding block assembly 61, the second sliding block assembly 61 pushes the handle of the second circuit breaker 6, the second circuit breaker 6 is switched to a closing state, and meanwhile the shorting device is opened. The whole electrical circuit is delta-type.
Referring to fig. 9, the operating mechanism continues to rotate counterclockwise. At this time, the first rod body 1 pushes the first slider assembly 51 to move, and the first slider assembly 51 pushes the handle of the first circuit breaker 5 to switch the first circuit breaker 5 to the opening state. While the second rod 2 remains stationary during the movement of the first rod 1. When the first circuit breaker 5 is switched to the open state, the trip device of the second circuit breaker 6 is triggered, and the second circuit breaker 6 is switched to the tripped state. The whole electric loop is restored to the initial state, namely, no output is generated by both circuit breakers.
Referring to fig. 10, when the external force is removed, the operating handle is driven by the handle of the second circuit breaker 6, and the mechanism is restored to the original position. At which time one cycle of operation ends.
Therefore, compared with the prior art, the mechanical forced starting device applied to star-delta voltage reduction starting of the fire pump and the electric control loop without contactors and the like, which are provided by the embodiment of the invention, the purely mechanical manual starting scheme is adopted, and the defect that a motor cannot be started due to power failure or control loop failure of the control loop in the contactor scheme is effectively overcome.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (8)
1. The mechanical forced starting device for star-delta voltage reduction starting of the fire pump is characterized by comprising a first circuit breaker (5), a second circuit breaker (6) and an operating mechanism, wherein a first sliding block assembly (51) is arranged on the first circuit breaker (5), the first sliding block assembly (51) drives the first circuit breaker (5) to be closed or opened, a second sliding block assembly (61) is arranged on the second circuit breaker (6), and the second sliding block assembly (61) drives the second circuit breaker (6) to be closed or opened;
the operating mechanism comprises a first rod body (1) and a second rod body (2), the first rod body (1) and the second rod body (2) are both rotatably connected to the rotating shaft (3), the first rod body (1) is simultaneously and fixedly connected with the first sliding block component (51), and the second rod body (2) is simultaneously and fixedly connected with the second sliding block component (61);
the end of the first rod body (1) is provided with a control component (11), the rotating shaft (3) passes through the control component (11), the edge of the control component (11) is provided with a first guide surface (12), one end of the first guide surface (12) is provided with a notch (13), the control component (11) is also connected with a first stop block (14), the first stop block (14) is positioned at the other end of the first guide surface (12) relative to the notch (13), and the first stop block (14) stops the second rod body (2) from a first side surface (21) of the second rod body (2);
the rotary shaft (3) is further sleeved with a swing arm (4), a sliding space (41) is formed in the swing arm (4), a sliding block (42) is arranged in the sliding space (41), the sliding block (42) is rotatably connected to the second rod body (2) and is overlapped with the second rod body (2), the sliding block (42) is connected with the rotary shaft (3) through an elastic component (43), the sliding block (42) is provided with a guide component (422) extending to the surface of the second rod body (2), a second stop block (44) is further connected to the swing arm (4), the second stop block (44) stops the second rod body (2) from a second side face (22) of the second rod body (2), and the second side face (22) and the first side face (21) are oppositely arranged;
the sliding block (42) is a kidney-shaped block, the sliding space (41) is a kidney-shaped hole, the length of the sliding space (41) is larger than that of the sliding block (42), and the notch part (13) is an arc notch matched with the appearance of the end part of the sliding block (42);
the second rod body (2) is provided with a second guide surface (23), and the guide part (422) is in guide fit with the second guide surface (23);
the surface of the second rod body (2) is provided with a lug (24), the lug (24) is arranged along the first side face (21), a lug free end (241) of the lug (24) extends towards the free end direction of the second rod body (2), the lug free end (241) is connected with a convex rib (25) traversing the surface of the second rod body (2), and the outer side of the convex rib (25) forms the second guide surface (23).
2. The mechanical forced starting device applied to star-delta step-down starting of a fire pump according to claim 1, wherein the first sliding block assembly (51) pushes a first handle of the first circuit breaker (5), and the first handle drives the first circuit breaker (5) to be closed or opened.
3. The mechanical forced starting device applied to star-delta step-down starting of a fire pump according to claim 1, wherein the second sliding block assembly (61) pushes a second handle of the second circuit breaker (6), and the second handle drives the second circuit breaker (6) to be closed or opened.
4. The mechanical forced starting device applied to star-delta pressure reduction starting of a fire pump according to claim 1, wherein the control component (11) is a circular plate body, and the first guide surface (12) is an arc-shaped guide surface on the edge of the control component (11).
5. The mechanical forced starting device applied to star-delta pressure reduction starting of a fire pump according to claim 1, wherein the swing arm (4) is a sector plate body.
6. A mechanical forced starting device for star-delta pressure-reducing starting of fire pump according to claim 1, characterized in that the second guiding surface (23) is an inclined surface.
7. A mechanical forced starting device for a star delta step down start of a fire pump according to claim 1 or 6, characterized in that the guiding member (422) is a cylinder.
8. The mechanical forced starting device for star-delta pressure reduction starting of a fire pump according to claim 7, wherein the bottom of the sliding block (42) is provided with a mounting base block (421), and the mounting base block (421) is rotatably mounted in an area surrounded by the protruding block (24) and the protruding rib (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322497.3A CN109378232B (en) | 2018-11-06 | 2018-11-06 | Mechanical forced starting device applied to star-delta voltage reduction starting of fire pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322497.3A CN109378232B (en) | 2018-11-06 | 2018-11-06 | Mechanical forced starting device applied to star-delta voltage reduction starting of fire pump |
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| Publication Number | Publication Date |
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| CN109378232A CN109378232A (en) | 2019-02-22 |
| CN109378232B true CN109378232B (en) | 2024-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811322497.3A Active CN109378232B (en) | 2018-11-06 | 2018-11-06 | Mechanical forced starting device applied to star-delta voltage reduction starting of fire pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110098074A (en) * | 2019-06-12 | 2019-08-06 | 沈阳斯沃电器有限公司 | A kind of emergency star angle starter |
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| CN106409600A (en) * | 2016-12-08 | 2017-02-15 | 郴州市东塘电气设备有限公司 | Mechanical emergency starting apparatus for start-delta voltage-reduction starting |
| CN207920815U (en) * | 2018-01-18 | 2018-09-28 | 四川华鹏电源有限公司 | The mechanical transmission structure of breaker type fire pump emergency starting device |
| CN209104015U (en) * | 2018-11-06 | 2019-07-12 | 安士缔(中国)电气设备有限公司 | A kind of mechanical forced starter applied to fire pump star delta reduced-voltage starting |
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| Publication number | Publication date |
|---|---|
| CN109378232A (en) | 2019-02-22 |
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