CN208874276U - The protective device of low-voltage equipment phase-deficient operation - Google Patents
The protective device of low-voltage equipment phase-deficient operation Download PDFInfo
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- CN208874276U CN208874276U CN201821340849.3U CN201821340849U CN208874276U CN 208874276 U CN208874276 U CN 208874276U CN 201821340849 U CN201821340849 U CN 201821340849U CN 208874276 U CN208874276 U CN 208874276U
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- contactor
- fuse
- low
- phase
- protective device
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Abstract
The utility model discloses the protective device of low-voltage equipment phase-deficient operation, it include shell, the hull outside is provided with control switch, the control switch connects live conductor circle, the crimping circle is connected with contactor assembly, the contactor assembly includes first contactor, second contactor and third contactor, fuse is provided with above the contactor assembly, and the fuse setting is inside housings, the fuse includes first fuse, second fuse and third fuse, the fuse is connected with switch trip, by using above structure, a phase-deficient operation protective device is provided for low-voltage equipment, after low pressure master switch source side phase decompression, corresponding A.C. contactor is released can, the coil without tension closure contact of connection disconnects, causing coil without tension power loss to release can, to disconnect low pressure master switch, then reach The purpose for protecting threephase motor in enterprise, factory workshop is avoided accident occurs and be caused any property loss and personal injury.
Description
Technical field
The utility model relates to the technical fields of three-phase motor, have been more specifically to low-voltage equipment phase-deficient operation
Protective device.
Background technique
Three-phase motor is used widely with social development, and threephase motor lacks a phase and can not start, still
Threephase motor lacks a phase in operation and remains to run, referred to as phase-deficient operation, and in phase-deficient operation, electric current will be more than normal
Value, motor will be burned out because of overheat, caused by the accident that enterprise, factory burns out motor is mostly due to phase-deficient operation, example
Such as, when a certain phase fuse opening of delta connection motor, then threephase stator winding is divided into two-way, all the way an only phase around
Group, the electric current in an only phase winding circuit when three-phase operation than greatly increasing, therefore the phase winding will necessarily be burnt out first.It beats
Motor terminal inspection is opened, is exactly delta connection phase-defect of motor if seeing that a phase winding is burnt and another two phase winding is not bad
A phase shortage is badly in need of in consequence caused by operation, the serious loss for being likely to result in property and the influence to personal safety now
The protective device of operation.
Utility model content
The utility model is directed to problem mentioned above, provides a kind of protective device of low-voltage equipment phase-deficient operation.
It is the protective device the technical solution of the utility model includes: low-voltage equipment phase-deficient operation below, includes shell, it is described
Hull outside is provided with control switch, and the control switch connects live conductor circle, and crimping circle setting is inside housings, institute
It states crimping circle and is connected with contactor assembly, the contactor assembly includes first contactor, second contactor and third contact
Device, the crimping circle are separately connected first contactor, second contactor and third contactor, setting above the contactor assembly
There is a fuse, and fuse setting is inside housings, the fuse includes first fuse, second fuse and the
Three fuses, and the first fuse is arranged above first contactor, second fuse is arranged above second contactor,
Third fuse is arranged above third contactor, and the fuse is connected with switch trip, the fuse and switch trip
Between be connected with ac contactor coil.
Preferably, the hull outside is provided with capping, described to cover the shell that is connected by a hinge.
Preferably, the crimping circle is using low tension switch crimping circle.
It compared with prior art, is the utility model has the beneficial effects that being low-voltage equipment by using above structure below
A phase-deficient operation protective device is provided, after low pressure master switch source side phase decompression, corresponding A.C. contactor releases energy, connection
Coil without tension closure contact disconnect, cause coil without tension power loss release can, to disconnect low pressure master switch, then reach protection factory
The purpose for looking forward to threephase motor in workshop is avoided accident occurs and be caused any property loss and personal injury.
Detailed description of the invention
Fig. 1 is the utility model schematic diagram of internal structure.
Fig. 2 is the utility model side view.
In conjunction with shown in Fig. 1 to Fig. 2: contactor assembly 2, fuse 3, crimping circle 4, switch trip 5, ac contactor coil
6, control switch 10, shell 11, first contactor 21, second contactor 22, third contactor 23, first fuse 31, second
Fuse 32, third fuse 33, capping 110.
Specific embodiment
It is described in detail, the protective device of low-voltage equipment phase-deficient operation, wraps for the utility model in conjunction with Fig. 1 to Fig. 2
Shell 11 is included, wherein control switch 10 is provided on the outside of shell 11, control switch 10 connects live conductor circle 4, and the crimping
Circle 4 is arranged inside shell 11, and crimping circle 4 is connected with contactor assembly 2, and contactor assembly 2 includes first contactor 21, the
Two contactors 22 and third contactor 23, crimping circle 4 are separately connected first contactor 21, second contactor 22 and third contactor
23, fuse 3 is provided with above contactor assembly 2, and the fuse 3 is arranged inside shell 11, fuse 3 includes the
One fuse 31, second fuse 32 and third fuse 33, and the first fuse 31 is arranged in first contactor 21
Side, second fuse 32 are arranged above second contactor 22, and third fuse 33 is arranged above third contactor 23, fusing
Device 3 is connected with switch trip 5, and ac contactor coil 6 is connected between fuse 3 and switch trip 5.
Further, be provided with capping 110 on the outside of shell 11, capping 110 is connected by a hinge shell 11, by shell 11 every
From protective device, prevent dust and hydrone from entering protective device, capping is mainly convenient to clean all parts in maintenance shell 11,
Crimping circle 4 is avoided that meaning in low-voltage equipment phase-deficient operation using low tension switch crimping circle 4, by using the crimping circle 4
Outer generation.
In conclusion it is normal with three A.C. contactors that low pressure master switch coil without tension voltage sample circuit is connected respectively
Contact is opened, when low pressure master switch three-phase bus obtains electric, three A.C. contactor normally opened contact closures are then normal after closing a switch
Work, but after low pressure master switch source side phase decompression, corresponding A.C. contactor releases energy, and the coil without tension of connection is closed contact
It disconnects, causes coil without tension power loss to release energy, to disconnect low pressure master switch, by using above structure, provided for low-voltage equipment
One phase-deficient operation protective device, after low pressure master switch source side phase decompression, corresponding A.C. contactor releases energy, the mistake of connection
Crimping trap conjunction contact disconnects, and coil without tension power loss is caused to release energy, to disconnect low pressure master switch, then reaches enterprise, protection factory vehicle
The purpose of interior threephase motor avoids that accident occurs, and causes any property loss and personal injury.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replace and deform, the scope of the utility model is limited by appended claims extremely equivalent.
Claims (3)
1. the protective device of low-voltage equipment phase-deficient operation includes shell (11), it is characterised in that: set on the outside of the shell (11)
It is equipped with control switch (10), the control switch (10) connects live conductor circle (4), and the crimping circle (4) is arranged in shell
(11) internal, the crimping circle (4) is connected with contactor assembly (2), and the contactor assembly (2) includes first contactor
(21), second contactor (22) and third contactor (23), the crimping circle (4) are separately connected first contactor (21), second
Contactor (22) and third contactor (23), contactor assembly (2) top is provided with fuse (3), and the fuse
(3) setting is internal in shell (11), and the fuse (3) includes first fuse (31), second fuse (32) and third
Fuse (33), and the first fuse (31) setting, above first contactor (21), second fuse (32) setting exists
Above second contactor (22), above third contactor (23), the fuse (3) is connected with for third fuse (33) setting
Switch trip (5) is connected with ac contactor coil (6) between the fuse (3) and switch trip (5).
2. the protective device of low-voltage equipment phase-deficient operation according to claim 1, it is characterised in that: the shell (11) is outside
Side is provided with capping (110), and the capping (110) is connected by a hinge shell (11).
3. the protective device of low-voltage equipment phase-deficient operation according to claim 1, it is characterised in that: the crimping circle (4)
Using low tension switch crimping circle (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340849.3U CN208874276U (en) | 2018-08-20 | 2018-08-20 | The protective device of low-voltage equipment phase-deficient operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821340849.3U CN208874276U (en) | 2018-08-20 | 2018-08-20 | The protective device of low-voltage equipment phase-deficient operation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208874276U true CN208874276U (en) | 2019-05-17 |
Family
ID=66465044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821340849.3U Active CN208874276U (en) | 2018-08-20 | 2018-08-20 | The protective device of low-voltage equipment phase-deficient operation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208874276U (en) |
-
2018
- 2018-08-20 CN CN201821340849.3U patent/CN208874276U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 519000 units 810, 811 and 812, building 2, No. 101, Daxue Road, Tangjiawan Town, high tech Zone, Zhuhai City, Guangdong Province Patentee after: Guangdong yundian Technology Co.,Ltd. Address before: 519000 room 105-15421, No. 6, Baohua Road, Hengqin new area, Zhuhai, Guangdong Patentee before: ZHUHAI YUNDIAN TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |