CN203895393U - Electronic phase-failure overcurrent adjustable protection switch - Google Patents
Electronic phase-failure overcurrent adjustable protection switch Download PDFInfo
- Publication number
- CN203895393U CN203895393U CN201420332108.6U CN201420332108U CN203895393U CN 203895393 U CN203895393 U CN 203895393U CN 201420332108 U CN201420332108 U CN 201420332108U CN 203895393 U CN203895393 U CN 203895393U
- Authority
- CN
- China
- Prior art keywords
- protection switch
- upper cover
- circuit board
- adjustable protection
- control circuit
- Prior art date
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- Expired - Fee Related
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Abstract
The utility model relates to an electronic phase-failure overcurrent adjustable protection switch, which mainly solves a problem that an existing automatic protection switch is poor in stability, low in sensitivity and small in application range. The electronic phase-failure overcurrent adjustable protection switch is characterized in that one side of a handle operating mechanism (5) is provided with an electromagnetic driver (7), one end of a moving iron core (9) is connected to a hook plate (11), a tripping mechanism (6) is connected to a cross bar (12), and the hook plate (11) corresponds to the cross bar (12); an induction coil (13) is connected with a control circuit board (10) through a wire, the control circuit board (10) is provided with a current comparison circuit, a current amplifying circuit and a tripping current regulating circuit, the tripping current regulating circuit is provided with a potentiometer, and an adjusting knob (14) of the potentiometer is arranged outside an upper cover (2). The electronic phase-failure overcurrent adjustable protection switch has the characteristics of good stability, high sensitivity and large application range, and realizes phase failure, overcurrent, rotation blocking and three-phase imbalance protection for a three-phase motor.
Description
Technical field
The utility model relates to the threephase motor Automatic Protection Switching using on a kind of water pump, is specifically related to the adjustable protection switch of a kind of electronic type phase shortage overcurrent.
Background technology
In water pump operation process; due to the reason of operational environment; threephase motor wherein often can run into the situations such as phase shortage, overcurrent, stall, three-phase imbalance; therefore; threephase motor is generally all provided with the Automatic Protection Switching of phase shortage, overcurrent protection; once above-mentioned bad working condition appears in threephase motor, Automatic Protection Switching disconnects the power supply circuits of threephase motor automatically, avoids causing threephase motor burnout failure.There is following technological deficiency in existing Automatic Protection Switching: 1. tripping mechanism utilizes bimetal leaf or lubricating cup to drive, less stable, and sensitivity is lower.2. due to bimetal leaf or lubricating cup adjusting inconvenience; can not realize step-less adjustment; generally after set up position, can only adapt to the threephase motor of corresponding power, need the different protection switches that are equipped with Multiple Type for the threephase motor of different capacity, the scope of application is less.
Utility model content
In order to overcome existing Automatic Protection Switching poor stability, sensitivity is low and the scope of application is less deficiency; the utility model provides a kind of electronic type phase shortage overcurrent adjustable protection switch, and the adjustable protection switch of this electronic type phase shortage overcurrent has good stability, the feature that highly sensitive and the scope of application is large.
The technical solution of the utility model is: the adjustable protection switch of this electronic type phase shortage overcurrent comprises housing and upper cover, fixed contact, moving contact, handle operation mechanism and tripping mechanism are installed in housing, tripping mechanism action can make handle operation mechanism thread off, and then make moving contact and fixed contact disjunction, the electromagnetic driver that one side of described handle operation mechanism is provided with, electromagnetic driver comprises coil and moving iron core, coil is connected with control circuit board, one end of moving iron core is connected with hook plate, on tripping mechanism, be connected with cross bar, described hook plate is corresponding with cross bar; On the three-phase main circuit being electrically connected on moving contact, all cover has inductance coil, inductance coil is connected with control circuit board by wire, control circuit board is provided with current comparison circuit, current amplification circuit and drop-away current regulating circuit, in drop-away current regulating circuit, be provided with potentiometer, the adjusting knob of described potentiometer is placed in outside upper cover.
On described, cover and be provided with graduation indication dish, graduation indication dish is at the periphery of adjusting knob.
In described housing, be provided with test switch, test switch is corresponding with the test button outside upper cover.
Described upper cover is provided with power supply indicator outward, and power supply indicator is connected with control circuit board.
The utlity model has following beneficial effect: owing to taking technique scheme, inductance coil collects the induced current in three-phase main circuit, judge whether phase shortage by the faradic vector that relatively three-phase circuit produces, electric leakage, overcurrent, stall or three-phase imbalance etc., the faradic vector producing as three-phase circuit is not zero and exceeds limit value, by current amplification circuit, signal is transported to magnetictrip and makes its action, hook plate affects cross bar to trigger tripping mechanism and realizes dropout, compare with bimetal leaf or lubricating cup in background technology, stability is better, sensitivity is higher.Utilize adjusting knob rated current to regulate, and then regulate applicable power, applied widely.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model.
Accompanying drawing 2 is upper cover 2 structural representations of the present utility model.
1-housing in figure, 2-upper cover, 3-fixed contact, 4-moving contact, 5-handle operation mechanism, 6-tripping mechanism, 7-electromagnetic driver, 8-coil, 9-moves iron core, 10-control circuit board, 11-hook plate, 12-cross bar, 13-inductance coil, 14-adjusting knob, 15-graduation indication dish, 16-test switch, 17-test button, 18-power supply indicator.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Shown in Fig. 1 and Fig. 2, the adjustable protection switch of this electronic type phase shortage overcurrent comprises housing 1 and upper cover 2, fixed contact 3 is installed in housing 1, moving contact 4, handle operation mechanism 5 and tripping mechanism 6, tripping mechanism 6 actions can make handle operation mechanism 5 thread off, and then make moving contact 4 and fixed contact 3 disjunctions, the electromagnetic driver 7 that one side of described handle operation mechanism 5 is provided with, electromagnetic driver 7 comprises coil 8 and moving iron core 9, coil 8 is connected with control circuit board 10, one end of moving iron core 9 is connected with hook plate 11, on tripping mechanism 6, be connected with cross bar 12, described hook plate 11 is corresponding with cross bar 12, on moving contact 4, on the three-phase main circuit of electrical connection, all cover has inductance coil 13, inductance coil 13 is connected with control circuit board 10 by wire, control circuit board 10 is provided with current comparison circuit, current amplification circuit and drop-away current regulating circuit, in drop-away current regulating circuit, be provided with potentiometer, the adjusting knob 14 of described potentiometer is placed in outside upper cover 2.Owing to taking technique scheme, inductance coil 13 collects the induced current in three-phase main circuit, judge whether phase shortage, electric leakage, overcurrent, stall or three-phase imbalance etc. by the faradic vector that relatively three-phase circuit produces, the faradic vector producing as three-phase circuit is not zero and exceeds limit value, by current amplification circuit, signal is transported to magnetictrip and makes its action, hook plate 11 affects cross bar 12 to trigger tripping mechanism 6 and realizes dropout, compare with bimetal leaf or lubricating cup in background technology, stability is better, and sensitivity is higher.Utilize adjusting knob 14 rated current to regulate, and then regulate applicable power, the present embodiment is step-less adjustment within the scope of 1.1KW～30KW, and namely this protection switch can be applicable to the threephase motor of 1.1KW～30KW, applied widely.
Described upper cover 2 is provided with graduation indication dish 15, and graduation indication dish 15 is at the periphery of adjusting knob 14.By watching adjusting knob 14 to indicate on graduation indication dish 15, just can regulate the three-phase electric acc power to adapting to, easy to adjust.
In described housing 1, be provided with test switch 16, test switch 16 is corresponding with the test button 17 outside upper cover 2.In the time of assembling and setting, press test button 17 and can realize the action of threading off, whether normally work so that detect this protection switch.
Described upper cover 2 is outer is provided with power supply indicator 18, and power supply indicator 18 is connected with control circuit board 10.Power supply indicator 18 can be indicated the state of moving contact 4 and fixed contact 3, as moving contact 4 with fixed contact 3 in engagement state, power supply indicator 18 is bright; If moving contact 4 and fixed contact 3 are in disjunction state, power supply indicator 18 does not work, and is mainly now the state when judging that handle operation mechanism 5 is threaded off, and when dropout, outer handle is in middle and upper part, be unfavorable for observing, just can know whether easily dropout by power supply indicator 18.
Claims (4)
1. the adjustable protection switch of electronic type phase shortage overcurrent, comprise housing (1) and upper cover (2), fixed contact (3) is installed in housing (1), moving contact (4), handle operation mechanism (5) and tripping mechanism (6), tripping mechanism (6) action can make handle operation mechanism (5) thread off, and then make moving contact (4) and fixed contact (3) disjunction, it is characterized in that: the electromagnetic driver (7) that a side of described handle operation mechanism (5) is provided with, electromagnetic driver (7) comprises coil (8) and moving iron core (9), coil (8) is connected with control circuit board (10), one end of moving iron core (9) is connected with hook plate (11), on tripping mechanism (6), be connected with cross bar (12), described hook plate (11) is corresponding with cross bar (12), on the three-phase main circuit of the upper electrical connection of moving contact (4), all cover has inductance coil (13), inductance coil (13) is connected with control circuit board (10) by wire, control circuit board (10) is provided with current comparison circuit, current amplification circuit and drop-away current regulating circuit, in drop-away current regulating circuit, be provided with potentiometer, the adjusting knob (14) of described potentiometer is placed in outside upper cover (2).
2. the adjustable protection switch of electronic type phase shortage overcurrent according to claim 1; it is characterized in that: described upper cover (2) is provided with graduation indication dish (15), and graduation indication dish (15) is at the periphery of adjusting knob (14).
3. the adjustable protection switch of electronic type phase shortage overcurrent according to claim 1 and 2; it is characterized in that: in described housing (1), be provided with test switch (16), test switch (16) is corresponding with the test button (17) outside upper cover (2).
4. the adjustable protection switch of electronic type phase shortage overcurrent according to claim 1 and 2; it is characterized in that: described upper cover (2) is outer is provided with power supply indicator (18), and power supply indicator (18) is connected with control circuit board (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420332108.6U CN203895393U (en) | 2014-06-21 | 2014-06-21 | Electronic phase-failure overcurrent adjustable protection switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420332108.6U CN203895393U (en) | 2014-06-21 | 2014-06-21 | Electronic phase-failure overcurrent adjustable protection switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203895393U true CN203895393U (en) | 2014-10-22 |
Family
ID=51721756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420332108.6U Expired - Fee Related CN203895393U (en) | 2014-06-21 | 2014-06-21 | Electronic phase-failure overcurrent adjustable protection switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203895393U (en) |
-
2014
- 2014-06-21 CN CN201420332108.6U patent/CN203895393U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20150621 |
|
| EXPY | Termination of patent right or utility model |