CN207475178U - A kind of three phase electric power protector with phase shortage automatic alarm - Google Patents
A kind of three phase electric power protector with phase shortage automatic alarm Download PDFInfo
- Publication number
- CN207475178U CN207475178U CN201721270453.1U CN201721270453U CN207475178U CN 207475178 U CN207475178 U CN 207475178U CN 201721270453 U CN201721270453 U CN 201721270453U CN 207475178 U CN207475178 U CN 207475178U
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- CN
- China
- Prior art keywords
- phase
- protector
- outer casing
- electric power
- mounting base
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of three phase electric power protectors with phase shortage automatic alarm of power safety technique field, including mounting base, protector outer casing is connected in the mounting base, warning light is installed on the right side of the protector outer casing, pile defection device is additionally provided on the protector outer casing, the right side of the pile defection device is connect by conducting wire with display screen, toggle switch is also equipped on the right side of the display screen, the lower section of the toggle switch is connect with earth leakage protective device, the present apparatus can find electric system phase-deficient operation operating mode in time, quickly make audible alarm, post operator on duty can have found electric power open-phase fault hidden danger in time, electrical equipment facility is avoided to burn out impaired.
Description
Technical field
The utility model is related to power safety technique field, specially a kind of three phase mains with phase shortage automatic alarm is protected
Protect device.
Background technology
It is mainly used for making three-phase circuit in the intelligent three-phase power protector used in the fields such as power industry and telecommunications at present
In protection switch.Its complete machine as a result of micro computer control, can in real time, accurate, on-line monitoring electric line operating condition,
Once electric leakage occurs for circuit, overload, protection, phase shortage etc. being capable of starting protection program immediately.Transformer phase failure, load-side operation
Three phase electric machine also will be in non-full-phase state, the running unexpected phase shortage of three phase electric machine, in the case of loading without variation, stator
Rotating excitation field will be serious uneven, and stator generates negative-sequence current, and electromagnetic induction potential occurs for negative sequence field and rotor, by rotor electricity
Stream is swift and violent to be increased, and rotor is caused seriously to generate heat.After long-time phase-deficient operation, motor winding wire loop current is more than necessarily specified electricity
Stream, causes motor housing to generate heat, burn-down of electrical machinery.For this purpose, we have proposed a kind of three phase mains guarantors with phase shortage automatic alarm
Shield device comes into operation, to solve the above problems.
Utility model content
The purpose of this utility model is to provide a kind of three phase electric power protector with phase shortage automatic alarm, in solution
State the problem of being proposed in background technology.
To achieve the above object, the utility model provides following technical solution：A kind of three-phase with phase shortage automatic alarm
Power supply protector including mounting base, is connected with protector outer casing, the right side peace of the protector outer casing in the mounting base
Alarm operating lamp is additionally provided with pile defection device on the protector outer casing, passes through conducting wire on the right side of the pile defection device
It is connect with display screen, toggle switch is also equipped on the right side of the display screen, lower section and the earth leakage protective of the toggle switch fill
Put connection.
Preferably, the mounting base is fixed on by lock-screw on working face, and the mounting portion of mounting base is provided with one
Molding both sides carry the card slot of snap-gauge.
Preferably, the protector outer casing is fixed with the strip to match with card slot, and protect with mounting base connection
The bottom of device shell is also uniformly provided with connection jaws.
Preferably, the pile defection device is by lack detection circuit, execution circuit, audio oscillating circuit, power amplification
Circuit and power cutting circuit composition, wherein lack detection circuit and execution circuit are electrically connected with display screen.
Compared with prior art, the beneficial effects of the utility model are：The present apparatus can find electric system phase shortage in time
Operating condition quickly makes audible alarm, and post operator on duty can have found electric power open-phase fault hidden danger in time, avoid electrically setting
Standby facility burns out impaired.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model；
Fig. 2 is the utility model pile defection device circuit figure.
In figure：1 mounting base, 2 protector outer casings, 3 warning lights, 4 pile defection devices, 5 display screens, 6 toggle switch, 7 leakages
Electrical protective device.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
- 2 are please referred to Fig.1, the utility model provides a kind of technical solution：A kind of three phase mains with phase shortage automatic alarm
Protector including mounting base 1, is connected with protector outer casing 2, the right side peace of the protector outer casing 2 in the mounting base 1
Alarm operating lamp 3 is additionally provided with pile defection device 4 on the protector outer casing 2, and the right side of the pile defection device 4 passes through
Conducting wire is connect with display screen 5, and the right side of the display screen 5 is also equipped with toggle switch 6, the lower section of the toggle switch 6 and leakage
Electrical protective device 7 connects.
Wherein, the mounting base 1 is fixed on by lock-screw on working face, and the mounting portion of mounting base 1 is provided with one
Molding both sides carry the card slot of snap-gauge, and the protector outer casing 2 is fixed with what is matched with card slot with 1 connection of mounting base
Strip, and the bottom of protector outer casing 2 is also uniformly provided with connection jaws 8, the pile defection device 4 by lack detection circuit, hold
Row circuit, audio oscillating circuit, power amplification circuit and power cutting circuit composition, wherein lack detection circuit and perform electricity
Road is electrically connected with display screen 5.
Operation principle：Pile defection device 4 is by lack detection circuit, execution circuit, audio concussion, power amplification and power supply
Cut off circuit composition, phase shortage circuit is made of R1, R2, R3, R4, C1, QL, C2, execution circuit by R5, R6, V1, V2, V3, V4,
C3, H, KM are formed, and audio oscillating circuit is made of R7, R8, V5, V6, RW1, RW2, C4, C5, NE555, power amplification circuit by
C6, C7, C8, R9, R10, R11, R12, TDA2030A, SP are formed, and power cutting circuit is made of KM2, C, are closed warning circuit
Power switch S, warning circuit is in and guards state, and contactor C accesses 380V power supplys by the normally closed contact KM2 of relay,
Its normally open contact C is closed, and realizes pre-on motor power, is closed power switch K at this time or electricity consumption start-up circuit starts motor, electricity
Machine enters operating status.When certain phase (such as U phase) fuse RD1 is caused to fuse, lack detection circuit has the unbalance voltage defeated immediately
Go out, filtered through bridge heap QL rectifications, C2, export a DC voltage, which is added in execution circuit, is triode through resistance R5
V1 provides ground level bias current and V1 is connected, and the optocoupler H that V1 collectors connect is also switched on, and direct current 12V power supplys lead to after optocoupler conducting
It crosses and provides base bias current for compound transistor V2, V3 by resistance R6, be never connected compound transistor V2, V3, its current collection
The relay KM energized actions that pole is connect are attracted, after the actuating of relay, thirdly docking point acts simultaneously, a pair of of normal opened contact KM1
Be closed, connect by when the audio oscillating circuit that forms of basis set blocking NE555 and power amplification circuit 12V power supplys, audio-frequency electric
The audio alarming signal that road generates is added to 1 foot of input terminal of power discharging integrated block TDA2030A through potentiometer RW2, C6, is put through power
Greatly, the high-power signal of 4 feet output makes loudspeaker SP generate alarm, while warning light 3 flickers, and operator on duty is prompted to pay attention to；Separately
The normally closed contact KM2 of a pair of of relay is opened, and disconnects the power supply of 380V ac contactor coils C, and contactor is normally opened to touch without electricity
Head C is returned, and point opens the three phase mains of motor, and motor is protected；Third is closed the normal opened contact KM3 of relay, make after
Electric appliance realizes self-sustaining, accordingly even when lack detection circuit is returned since motor power powers off, will not cause motor power transmission again,
Only by after troubleshooting, and reset button FA and toggle switch 6 are pressed, circuit reset, warning circuit, which reenters, waits for shape
State.
While there has been shown and described that the embodiment of the utility model, for the ordinary skill in the art,
It is appreciated that can these embodiments be carried out with a variety of variations in the case of the principle and spirit for not departing from the utility model, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of three phase electric power protector with phase shortage automatic alarm, including mounting base (1), it is characterised in that：The installation
Protector outer casing (2) is connected on seat (1), warning light (3), the guarantor are installed on the right side of the protector outer casing (2)
Pile defection device (4) is additionally provided on shield device shell (2), the right side of the pile defection device (4) passes through conducting wire and display screen
(5) it connects, toggle switch (6) is also equipped on the right side of the display screen (5), lower section and the electric leakage of the toggle switch (6) are protected
Protection unit (7) connects.
2. a kind of three phase electric power protector with phase shortage automatic alarm according to claim 1, it is characterised in that：It is described
Mounting base (1) is fixed on by lock-screw on working face, and the mounting portion of mounting base (1) is provided with integrally formed both sides and carries
The card slot of snap-gauge.
3. a kind of three phase electric power protector with phase shortage automatic alarm according to claim 1, it is characterised in that：It is described
Protector outer casing (2) is fixed with the strip to match with card slot, and the bottom of protector outer casing (2) with mounting base (1) connection
Portion is also uniformly provided with connection jaws (8).
4. a kind of three phase electric power protector with phase shortage automatic alarm according to claim 1, it is characterised in that：It is described
Pile defection device (4) is by lack detection circuit, execution circuit, audio oscillating circuit, power amplification circuit and dump electricity
Road forms, and wherein lack detection circuit and execution circuit are electrically connected with display screen (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721270453.1U CN207475178U (en) | 2017-09-29 | 2017-09-29 | A kind of three phase electric power protector with phase shortage automatic alarm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721270453.1U CN207475178U (en) | 2017-09-29 | 2017-09-29 | A kind of three phase electric power protector with phase shortage automatic alarm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207475178U true CN207475178U (en) | 2018-06-08 |
Family
ID=62267195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721270453.1U Expired - Fee Related CN207475178U (en) | 2017-09-29 | 2017-09-29 | A kind of three phase electric power protector with phase shortage automatic alarm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207475178U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108538019A (en) * | 2018-06-12 | 2018-09-14 | 上海兆莹自控设备有限公司 | Site Detection data remote detecting system |
-
2017
- 2017-09-29 CN CN201721270453.1U patent/CN207475178U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108538019A (en) * | 2018-06-12 | 2018-09-14 | 上海兆莹自控设备有限公司 | Site Detection data remote detecting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180608 Termination date: 20200929 |