CN2443530Y - Double protecting system controller for motor - Google Patents
Double protecting system controller for motor Download PDFInfo
- Publication number
- CN2443530Y CN2443530Y CN00254437U CN00254437U CN2443530Y CN 2443530 Y CN2443530 Y CN 2443530Y CN 00254437 U CN00254437 U CN 00254437U CN 00254437 U CN00254437 U CN 00254437U CN 2443530 Y CN2443530 Y CN 2443530Y
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- motor
- star
- control device
- protection system
- protection
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- Protection Of Generators And Motors (AREA)
Abstract
The utility model discloses a double protection system control device for protecting motors. The utility model is characterized in that on the base of the existing single protection system control device, a thermal relay 42 and a control switch 61 are added; the thermal relay 42 is connected in a star connection starting circuit of the motors. The utility model effectively overcomes the problems that a protection setting value of the existing motor protection device does not provide effective protection for the motors in the star connection running state to cause the damage of the motors. The utility model has the advantages of clear layout, convenient maintenance, reliable operation, etc. The utility model can satisfy the need of the safe operation of the motor with low cost.
Description
The utility model relates to a kind of protection system control device for guaranteeing that motor operational reliability and fail safe are provided with.
In order to make the motor can safe operation, general every motor all be equipped with single protection system control device, is used to detect and excise the fault of motor when delta connection moves, and its winding diagram is seen Fig. 1.This existing the single protection system control device at configuration protection under the triangle running status remains in the imperfection part: when motor is not finished star for a certain reason to the conversion of delta connection in star/delta wiring start-up course; motor still moves under the star-star connection state this moment; and the protection of control device of electric motor is to adjust by the running current of delta connection; this setting value can't provide effective protection to the motor that is in the star-star connection operation, will cause motor to be burnt.
The purpose of this utility model provides a kind of pair of protection system control device, the characteristics that have star-star connection and two kinds of operational modes of delta connection according to motor are provided with two protection systems, in motor star-star connection mode a protection system is set, the protection value of this protection system is adjusted according to the rated current of motor star-star connection operation; In motor delta connection mode a protection system is set, the protection value of this protection system is adjusted according to the rated current of motor delta connection operation, constitutes two protection system control device, improves the fail safe and the reliability of motor operation.
The purpose of this utility model is achieved in that the two protection system control device of a kind of motor, the start-up control device that comprises star-delta connection, in motor winding star-star connection operational mode a relaying protection system is set, the protection value of this protection system is adjusted according to the rated current of motor star-star connection operation; In motor winding delta connection operational mode a relaying protection system is set, the protection value of this protection system is adjusted according to the rated current of motor delta connection operation; It is characterized in that: be provided with a protection system in motor winding delta connection operational mode; be provided with another protection system in motor winding star-star connection mode, and control motor winding is at the control switch of triangle and two kinds of wiring run locations of star.
This pair protection system control device comprises motor 1, automatic switch 21, starts loop 22, A.C. contactor 31,32,33 and thermal relay 41, the time relay 51; Wherein: form star-star connection by A.C. contactor 31,33 and motor 1 and start the loop, form delta connection by A.C. contactor 31,32 and motor 1 and start the loop, thermal relay 41 is connected the motor delta connection and starts in the loop, is the protection system under the motor delta connection running status; In addition, this device also comprises thermal relay 42 and control switch 61, and wherein thermal relay 42 is connected in the motor star-star connection startup loop, is the protection system under the motor star-star connection running status.
In order further motoring to be shown, this pair protection system control device can also dispose indicator light 71,72 in circuit, and wherein indicator light 71 is attempted by on the A.C. contactor 33, and indicator light 72 is attempted by on the A.C. contactor 32.
In order to obtain the current signal of motor under delta connection running status and star-star connection running status; and respectively by the rated current of different running statuses adjust its protection operating value; this pair protection system control device is capable can set up current transformer 81,82, and described thermal relay 41,42 is connected to the secondary side of current transformer 81,82.
Adopt of the present utility model pair of protection system control device; the protection setting value that has overcome present motor protecting device effectively can't provide effective protection to the motor that is under the star-star connection running status; thereby the defective that causes motor to be burnt; simultaneously; this device also has advantages such as layout is clear, easy to maintenance, reliable; with very low cost, can satisfy the needs of motor safe operation.
Below in conjunction with the utility model being described further below in conjunction with drawings and Examples:
Accompanying drawing 1 is existing motor list protection system control device winding diagram;
Accompanying drawing 2 is circuit theory diagrams of the utility model control device first embodiment;
Accompanying drawing 4 is circuit theory diagrams of the utility model control device second embodiment;
Accompanying drawing 5 is the circuit theory diagrams that have current transformer in the circuit of accompanying drawing 4;
Accompanying drawing 6 is that the utility model carries out improved wiring schematic diagram to prior art.
Accompanying drawing 7 is circuit theory diagrams that the utility model is used for two motors;
Accompanying drawing 8 is the circuit theory diagrams that have current transformer in the circuit of accompanying drawing 7.
Accompanying drawing 9 is that the utility model is at the circuit theory diagrams by the soft initiator actuating motor.
Accompanying drawing 10 is circuit theory diagrams of another embodiment of accompanying drawing 9.
See also Fig. 1; existing motor list protection system control device is made up of motor 1, automatic switch 21, startup loop 22, A.C. contactor 31,32,33 and thermal relay 41, the time relay 51; when by startup loop 22 actuating motors 1; A.C. contactor 31,33 closures; form star-star connection with motor 1 and start the loop; after the time relay 51 time-delays; disconnect A.C. contactor 33; A.C. contactor 32 closures; this moment, motor transferred the delta connection running status to, provided protection by thermal relay 41 for motor.Yet; in the motor start-up process; if finish the conversion of operation from the star to the delta connection for a certain reason and not; motor will still move under star-star connection; because the motor protection system control device is to adjust by the running current of delta connection; just can't provide effective protection, thereby cause being burnt of motor 1 being in the operating motor 1 of star-star connection.
In the circuit theory diagrams of the two protection system control device of the utility model as shown in Figure 2; the prior art part in comprising Fig. 1; this control device also comprises thermal relay 42 and control switch 61; wherein thermal relay 42 is connected in the motor star-star connection startup loop, is the protection system under the motor star-star connection running status.In order further motoring to be shown, this pair protection system control device has also disposed indicator light 71,72, and wherein indicator light 71 is attempted by on the A.C. contactor 33, and indicator light 72 is attempted by on the A.C. contactor 32.
When being in star-star connection, motor starts when changing the delta connection operation again over to, control switch 61 is placed the delta connection running status, by starting loop 22 actuating motors 1, A.C. contactor 31,33 gets electric closure at this moment, form star-star connection with motor 1 and start the loop, thermal relay 42 inserts and starts the loop operation, for motor star-star connection operation provides protection; Subsequently; the time relay 51 disconnects A.C. contactor 33 dead electricity through time-delay; A.C. contactor 32 gets electric closure; form the delta connection operating loop with A.C. contactor 31, motor 1; indicator light 72 is bright; thermal relay 42 is out of service, and thermal relay 41 inserts the triangle operating loop, for the operation of motor delta connection provides protection.Like this, in start-up course, do not finish for a certain reason by star when motor 1 and to get wiring when conversion to triangle, motor still is in the star-star connection running status, thermal relay 42 will detect the running current of motor 1, if this running current is greater than the winding rated current of motor 1, thermal relay 42 will move A.C. contactor 33 dead electricity are disconnected, A.C. contactor 32 gets electric closure, indicator light 72 is luminous simultaneously, motor 1 is switched to the delta connection operational mode, avoided motor to be burnt.
When motor is in star-star connection startup, star-star connection running status, that is to say: when motor 1 load is light, motor adopts the star-star connection operational mode more reasonable, place the star-star connection running status to control switch 61 this moment, and by starting loop 22 actuating motors 1, A.C. contactor 31,33 gets electric closure, indicator light 71 is bright, form star-star connection with motor 1 and start loop and operating loop, thermal relay 42 inserts in this loop and moves, for motor provides protection; Subsequently, 51 in the time relay is inoperative, has only when motor 1 overload, just by thermal relay 42 motor 1 is switched to the delta connection running status.
Fig. 3 is the circuit theory diagrams of control device when being provided with current transformer shown in Figure 2; its thermal relay 41,42 is connected the secondary side of current transformer 81,82; obtain the current signal of motor under delta connection running status and star-star connection running status from the secondary side of current transformer 81,82; and respectively by the rated current of different running statuses adjust its protection operating value; except above-mentioned difference, other operating principles are identical with Fig. 2.
Fig. 4 is the circuit theory diagrams of the another kind of embodiment of the utility model control device, is that with difference embodiment illustrated in fig. 2 it has cancelled A.C. contactor 31, has set up another time relay 52, and this time relay 52 is attempted by on the indicator light 72.When being in star-star connection, motor starts when changing the delta connection operation again over to, control switch 61 is placed the delta connection running status, by starting loop 22 actuating motors 1, A.C. contactor 33 gets electric closure at this moment, form star-star connection with motor 1 and start the loop, thermal relay 42 provides protection for motor star-star connection operation, this moment the time relay 52 also electric closure, move and get ready for motor 1 is converted to delta connection; Subsequently, the time relay 51 disconnects A.C. contactor 33 dead electricity through time-delay, and A.C. contactor 32 gets electric closure; form the delta connection operating loop with motor 1; thermal relay 42 is out of service, and thermal relay 41 inserts the triangle operating loop, for the motor operation provides protection.If motor 1 is not finished in start-up course for a certain reason by star and is got the wiring conversion to triangle, motor still is in the star-star connection running status, thermal relay 42 will detect the running current of motor 1, if this running current is greater than the winding rated current of motor 1, thermal relay 42 will move A.C. contactor 33 dead electricity are disconnected, A.C. contactor 32 gets electric closure, and motor 1 is switched to the delta connection operational mode, has avoided motor to be burnt.When being in star-star connection, motor starts; during the star-star connection running status; control switch 61 is placed the star-star connection running status; by starting loop 22 actuating motors 1; A.C. contactor 33 gets electric closure; form star-star connection with motor 1 and start loop and operating loop; thermal relay 42 inserts in this loop and moves; for providing protection time relay this moment 52, motor gets electric closure; for being converted to the delta connection operation, motor 1 gets ready; 51 in the time relay is inoperative; have only when motor 1 overload, just motor 1 is switched to the delta connection running status by thermal relay 42.
Fig. 5 is the circuit theory diagrams of control device when being provided with current transformer shown in Figure 4; its thermal relay 41,42 is connected the secondary side of current transformer 81,82; obtain the current signal of motor under delta connection running status and star-star connection running status from the secondary side of current transformer 81,82; and respectively by the rated current of different running statuses adjust its protection operating value; except above-mentioned difference, other operating principles are identical with Fig. 4.
Fig. 6 is that the utility model carries out improved wiring schematic diagram to prior art, device that increases and circuit are as shown in phantom in FIG., thermal relay 42 that is wherein increased and control switch 61 can be installed in the former control device, also can make a little chest and be attached to outside the former control device.
The utility model also can be used for the situation of two motors, as shown in Figure 7, control device is made up of automatic switch (121,221), startup loop (122,222), A.C. contactor (131,132,133,231,232,233) and thermal relay (141,142,241,242), the time relay (151,251) and control switch (161,261), indicator light (171,172,271,272).A.C. contactor of control device (131,132) and thermal relay 141 are formed the delta connection running protection control system of motor 1; A.C. contactor (131,133) and thermal relay 142 are formed motor 1 star-star connection running protection control system, protect control system and automatic switch 121, the time relay 151, control switch 161, indicator light (171,172) to form 1 pair of protection system control loop of motor for two.A.C. contactor of control device (231,232) and thermal relay 241 are formed motor 2 delta connection running protection control system; A.C. contactor (231,233) and thermal relay 242 are formed motor 2 star-star connection running protection control system, protect control system and automatic switch 221, the time relay 251, control switch 261, indicator light (271,272) to form 2 pairs of protection system control loops of motor for two.Two protection system control loops of two motors constitute two protection system control device of motor 1 and motor 2 two motors.Other principle of present embodiment is identical with accompanying drawing 2.
Also current transformer can be set in the embodiment shown in fig. 7, as shown in Figure 8, its thermal relay (141,142) is connected the secondary side of current transformer (181,182), obtain the current signal of motor 1 from the secondary side of current transformer (181,182) in delta connection running status and star-star connection running status, and respectively by the rated current of delta connection running status, star-star connection running status adjust its protection operating value; Thermal relay (241,242) is connected the secondary side of current transformer (281,282), obtain the current signal of motor 2 from the secondary side of current transformer (281,282) in delta connection running status and star-star connection running status, and respectively by the rated current of delta connection running status, star-star connection running status adjust its protection operating value; Other principle of this circuit is identical with Fig. 7.
In actual use, motor also can be started (soft initiator is a prior art) by soft initiator, for this reason, the utility model has designed the embodiment by the soft initiator actuating motor as shown in Figure 9, and motor 1 control device is made up of fast acting fuse 7, soft initiator 3, A.C. contactor 4 and thermal relay (51,52), change over switch 6.Soft initiator 3, A.C. contactor 4 and thermal relay 51, change over switch 6 are formed motor 1 delta connection running protection control system; The soft initiator 3 of control device, A.C. contactor 4 and thermal relay 52, change over switch 6 are formed motor 1 star-star connection running protection control system; Thereby constitute 1 pair of protection system control device of motor.Control device mainly contains two kinds of operational modes: 1) the motor delta connection starts; delta connection operation: change over switch 6 is placed the delta connection running status; during by soft initiator 3 actuating motors 1; change over switch 6; soft initiator 3 is formed motor 1 delta connection and is started the loop; after startup is finished; A.C. contactor 4 closures; A.C. contactor 4; thermal relay 51 and change over switch 6 are formed motor 1 delta connection operating loop; thermal relay 51 provides protection for the operation of motor 1 delta connection; when motor 1 running current surpasses motor 1 delta connection safe operation electric current, disconnect motor.2) the motor star-star connection starts; star-star connection operation: when motor load is light; motor 1 adopts star-star connection state operating ratio more reasonable; like this change over switch 6 is placed the star-star connection running status; during by soft initiator 3 actuating motors 1; change over switch 6; soft initiator 3 is formed motor 1 star-star connection and is started the loop; after startup is finished; A.C. contactor 4 closures; A.C. contactor 4; thermal relay 52 provides protection for motor star-star connection operation; when motor 1 running current surpasses motor 1 star-star connection safe operation electric current, send alarm signal and notify the operator on duty that motor is transformed into the delta connection running status or disconnects motor.
Accompanying drawing 10 is the utility model circuit theory diagrams at the embodiment of soft initiator actuating motor (the built-in overload protection function of soft initiator); it has saved the thermal relay summation current transformer; the protection operating value of motor 1 delta connection running status, star-star connection running status has the built-in programming of soft initiator to adjust; the built-in programming of soft initiator is according to motor 1 triangle, the star-star connection operating state signal of change over switch 6 feedbacks, output protection Design of Signal.Other operating principle is identical with accompanying drawing 9.
The utility model can be according to actual needs, and a control device can be made control 1-4 platform motor, is specially adapted to the motor of each electric pressure, also is suitable for using as the motor of generator operation.
Claims (8)
1. two protection system control device of a motor, the start-up control device that comprises star-delta connection, in motor winding star-star connection operational mode a relaying protection system is set, the protection value of this protection system is adjusted according to the rated current of motor star-star connection operation; In motor winding delta connection operational mode a relaying protection system is set, the protection value of this protection system is adjusted according to the rated current of motor delta connection operation; It is characterized in that: be provided with a protection system in motor winding delta connection operational mode; be provided with another protection system in motor winding star-star connection mode, and control motor winding is at the control switch of triangle and two kinds of wiring run locations of star.
2. the two protection system control device of motor according to claim 1 is characterized in that the control device of electric motor that adopts star-delta connection reduced-voltage starting comprises motor (1), automatic switch (21), starts loop (22), A.C. contactor (31), (32), (33) and thermal relay (41), the time relay (51); Wherein: form star-star connection by A.C. contactor (31), (33) and motor (1) and start the loop, form delta connection by A.C. contactor (31), (32) and motor (1) and start the loop, thermal relay (41) is connected the motor delta connection and starts in the loop, is the protection system under the motor delta connection running status; This device also comprises thermal relay (42) and control switch (61), and wherein thermal relay (42) is connected in the motor star-star connection startup loop, is the protection system under the motor star-star connection running status.
3. the two protection system control device of motor according to claim 1 and 2; it is characterized in that: the two protection system control device of described motor also comprise current transformer (81), (82), and described thermal relay (41), (42) are connected to the secondary side of current transformer (81), (82).
4. the two protection system control device of motor according to claim 1 and 2; it is characterized in that: the two protection system control device of described motor also comprise another time relay (52); cancel an A.C. contactor (31), had only two A.C. contactors (32,33).
5. the two protection system control device of motor according to claim 4; it is characterized in that: the two protection system control device of described motor also comprise current transformer (81), (82), and described thermal relay (41), (42) are connected to the secondary side of current transformer (81), (82).
6. the two protection system control device of motor according to claim 1, it is characterized in that described motor is a two motors, control device is made up of automatic switch (121,221), startup loop (122,222), A.C. contactor (131,132,133,231,232,233) and thermal relay (141,142,241,242), the time relay (151,251) and control switch (161,261), indicator light (171,172,271,272); A.C. contactor of control device (131,132) and thermal relay (141) are formed the delta connection running protection control system of motor (1); A.C. contactor (131,133) and thermal relay (142) are formed motor (1) star-star connection running protection control system, protect control system and automatic switch (121), the time relay (151), control switch (161), indicator light (171,172) to form the two protection system control loops of motor (1) for two; A.C. contactor of control device (231,232) and thermal relay (241) are formed motor (2) delta connection running protection control system; A.C. contactor (231,233) and thermal relay (242) are formed motor (2) star-star connection running protection control system, protect control system and automatic switch (221), the time relay (251), control switch (261), indicator light (271,272) to form the two protection system control loops of motor (2) for two; Two protection system control loops of two motors constitute two protection system control device of motor (1) and motor (2) two motors.
7. the two protection system control device of motor according to claim 7, it is characterized in that described thermal relay (141,142) is connected the secondary side of current transformer (181,182), obtain the current signal of motor (1) from the secondary side of current transformer (181,182) in delta connection running status and star-star connection running status, and respectively by the rated current of delta connection running status, star-star connection running status adjust its protection operating value; Thermal relay (241,242) is connected the secondary side of current transformer (281,282); obtain the current signal of motor (2) from the secondary side of current transformer (281,282) in delta connection running status and star-star connection running status, and respectively by the rated current of delta connection running status, star-star connection running status adjust its protection operating value.
8. the two protection system control device of motor according to claim 1 is characterized in that adopting the control device of the motor that soft initiator starts to be made up of fast acting fuse (7), soft initiator (3), A.C. contactor (4) and thermal relay (51,52), change over switch (6); Soft initiator (3), A.C. contactor (4) and thermal relay (51), change over switch (6) are formed motor delta connection running protection control system; The soft initiator of control device (3), A.C. contactor (4) and thermal relay (52), change over switch (6) are formed motor star-star connection running protection control system; Thereby constitute the two protection system control device of motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00254437U CN2443530Y (en) | 2000-09-30 | 2000-09-30 | Double protecting system controller for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00254437U CN2443530Y (en) | 2000-09-30 | 2000-09-30 | Double protecting system controller for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2443530Y true CN2443530Y (en) | 2001-08-15 |
Family
ID=33611690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00254437U Expired - Fee Related CN2443530Y (en) | 2000-09-30 | 2000-09-30 | Double protecting system controller for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2443530Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950944A (en) * | 2010-09-21 | 2011-01-19 | 深圳市华力特电气股份有限公司 | Device and method for relay protection |
| CN104270043A (en) * | 2014-09-26 | 2015-01-07 | 金学成 | Intelligent protecting method and device for controlling and driving brushless motor |
| CN104362905A (en) * | 2014-11-25 | 2015-02-18 | 安徽鑫龙电器股份有限公司 | Double speed motor soft starter and control method thereof |
-
2000
- 2000-09-30 CN CN00254437U patent/CN2443530Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950944A (en) * | 2010-09-21 | 2011-01-19 | 深圳市华力特电气股份有限公司 | Device and method for relay protection |
| CN101950944B (en) * | 2010-09-21 | 2013-01-02 | 深圳市华力特电气股份有限公司 | Device and method for relay protection |
| CN104270043A (en) * | 2014-09-26 | 2015-01-07 | 金学成 | Intelligent protecting method and device for controlling and driving brushless motor |
| CN104362905A (en) * | 2014-11-25 | 2015-02-18 | 安徽鑫龙电器股份有限公司 | Double speed motor soft starter and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |