CN201608512U - Device for protecting shift operation of frequency converter - Google Patents
Device for protecting shift operation of frequency converter Download PDFInfo
- Publication number
- CN201608512U CN201608512U CN2009203507351U CN200920350735U CN201608512U CN 201608512 U CN201608512 U CN 201608512U CN 2009203507351 U CN2009203507351 U CN 2009203507351U CN 200920350735 U CN200920350735 U CN 200920350735U CN 201608512 U CN201608512 U CN 201608512U
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- relay
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- 230000001681 protective effect Effects 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
A device for protecting the shift operation of a frequency converter comprises a frequency converter, a transformer and a motor, wherein the transformer supplies power for the motor through the frequency converter; the device also comprises an on-off sensor, an intermediate relay, an alarm relay and a sound and light alarm device, wherein the sensing end of the on-off sensor is arranged on a cable at the load side of the transformer; the signal output end of the on-off sensor is connected with a coil of the intermediate relay; a normally-closed contact of the intermediate relay is connected with a coil of the alarm relay; and a normally-open contact of the alarm relay is electrically connected with the sound and light alarm device. In the utility model, the functions of alarm and stop are achieved through the current generated when a frequency converter rectifier cabinet works and the current monitoring by the on-off sensor; the operation of the rectifier cabinet is detected by adding the on-off sensor on the inlet wire of the rectifier cabinet; and the alarm and stop are carried out through auxiliary nodes of the on-off sensor.
Description
Technical field
The utility model relates to a kind of frequency converter and moves the protective device that becomes operation.
Background technology
Coal-winning machine in the colliery adopts frequency control, frequency conversion tank is moved to become by many frequency conversions and is given many rectifier cabinet power supplies, frequency conversion moves to become and comprises frequency converter and transformer, transformer is powered to motor by frequency converter, frequency converter is to use converter technique and microelectric technique, and the frequency by changing the machine operation power supply and the mode of amplitude are controlled the Electric Drive element of alternating current motor.Many frequency conversions move parallel running between the change.When the frequency converter rectifier cabinet has one or more off-duty, will increase the load of other rectifier cabinet like this.If thereby long-time overload operation will cause transformer, rectifier cabinet and cable overload operation to cause transformer, rectifier cabinet and cable bad or burn; Because one or more off-duty of rectifier cabinet, dc voltage fluctuation is bigger, and motor and rectifier cabinet even electrical network are all had a significant impact.
The utility model content
In order to solve the monitoring problem of frequency converter rectifier cabinet separate unit operation, the utility model provides a kind of frequency converter to move the protective device that becomes operation.
The technical solution adopted in the utility model is: described device comprises frequency converter, transformer and motor, transformer is powered to motor by frequency converter, described device also comprises start-stop transducer, auxiliary relay, alarm relay and acoustic-optic alarm, the sense terminals of described start-stop transducer is installed on the cable of transformer load side, the signal output part of start-stop transducer is connected with the coil of auxiliary relay, the normally-closed contact of auxiliary relay is connected with the coil of alarm relay, and the normally opened contact of alarm relay is electrically connected with acoustic-optic alarm.
Described device also comprises intrinsic safety electric source, and being used for provides power supply to the start-stop transducer.
Described device also comprises the time relay, and the coil of the described time relay is connected with the contactor normally opened contact of motor, and the normally opened contact of the described time relay is connected with the coil of alarm relay.
Described start-stop transducer comprises the first start-stop transducer and the second start-stop transducer, and the sense terminals of the first start-stop transducer and the second start-stop transducer is installed in respectively on the load side cable of two transformers;
Auxiliary relay comprises first auxiliary relay, second auxiliary relay and the 3rd auxiliary relay, the signal output part of the first start-stop transducer is connected with the coil of first auxiliary relay, the signal output part of the second start-stop transducer is connected with the coil of second auxiliary relay, and the coil with very first time relay normally open contact, alarm relay after the normally-closed contact parallel connection of first auxiliary relay and second auxiliary relay is connected in series;
The time relay comprises the very first time relay and second time relay, the coil of very first time relay is connected with the contactor normally opened contact of load motor, after first auxiliary relay, the second auxiliary relay normally-closed contact parallel connection with very first time relay time-delay make war connect and with alarm relay coil formation loop.The coil of second time relay is connected with the normally opened contact of alarm relay, the normally opened contact of second time relay is connected with the coil of the 3rd auxiliary relay later with the normally opened contact parallel connection of the 3rd auxiliary relay, the normally-closed contact of the 3rd auxiliary relay is connected with the door latch switch that becomes frequency converter, and the normally opened contact of alarm relay is connected with acoustic-optic alarm.
The principle that the utility model produces electric current, do not work and do not have electric current to produce when utilizing the work of frequency converter rectifier cabinet installs the operation that the start-stop transducer detects rectifier cabinet additional on the rectifier cabinet inlet wire.Report to the police and stop through treatment conversion with the auxiliary node of start-stop transducer then.In case single transformer operation phenomenon occurs, can stop at once and give the alarm and notify the staff, reduced economic loss, improved operating efficiency, also saved manpower simultaneously.
Description of drawings
Fig. 1 is the schematic diagram of a kind of execution mode of the utility model;
Fig. 2 is sound and light alarm connecting circuit figure of the present utility model;
Fig. 3 is magnificent light warning connecting circuit figure of the present utility model;
Fig. 4 is frequency converter door switch connecting circuit figure of the present utility model;
Fig. 5 is a circuit diagram of the present utility model.
Embodiment
The frequency converter that the utility model is provided below in conjunction with accompanying drawing moves the protective device that becomes operation and describes in further detail:
This device comprises frequency converter, transformer and motor, transformer is powered to sealing-tape machine by frequency converter, this device also comprises start-stop transducer, auxiliary relay, alarm relay and acoustic-optic alarm, the sense terminals of start-stop transducer is installed on the cable of transformer load side, the signal output part of start-stop transducer is connected with the coil of auxiliary relay, the normally-closed contact of auxiliary relay is connected with the coil of alarm relay, and the normally opened contact of alarm relay is electrically connected with acoustic-optic alarm.Realized monitoring by this device to frequency converter rectifier cabinet separate unit operation conditions.
In a kind of preferred implementation, realized a frequency converter is moved the protection of change.This device comprises a start-stop transducer, two auxiliary relays, two time relays, an alarm relay and an acoustic-optic alarm, the sense terminals of start-stop transducer is installed on the cable of transformer load side, the signal output part of start-stop transducer is connected with the coil of first auxiliary relay and forms the loop, the first auxiliary relay normally-closed contact is made war with very first time relay time-delay and is connected and alarm relay coil formation loop, and the normally opened contact of alarm relay is electrically connected with acoustic-optic alarm and forms the loop.The auxiliary normally opened contact of alarm relay is connected with the second auxiliary relay coil and forms the loop, and one group of second auxiliary relay assists that normally opened contact is connected with the frequency converter door switch, second group of normally opened contact and the second auxiliary relay coil are connected to form the loop and reach the self-locking purpose.Whether the start-stop transducer is used to detect variable-frequency transformer charged, if electricity is arranged, the sense terminals of frequency converter is connected by signal output part signal and forms the loop with the coil of auxiliary relay.When variable-frequency transformer does not move the start-stop transducer close point disconnect, thereby the auxiliary normally closed closure of first auxiliary relay makes alarm relay connect, the normally opened contact closure of alarm relay, thereby the normally opened contact closure of triggering alarm relay, warning electric bell sound of movement.Thereby the normally opened contact of alarm relay is closed to make second time relay connection work; second time relay time-delay closure battle makes second auxiliary relay connect; make the door switch closure thereby one group of auxiliary normally opened contact of second time relay is closed, sealing-tape machine is shut down.The second group of normally opened contact and the second auxiliary relay coil are connected to form the loop and reach the self-locking purpose.
Preferably, this device also comprises intrinsic safety electric source V, is used for providing power supply to the start-stop transducer.Transformer voltage is interchange and dangerous.This device is by increasing intrinsic safety electric source (have another name called the essential safety power supply, belong to the explosive gas atmosphere electrical apparatus for explosive atmospheres), and the discharge energy under the ore deposit under the extreme case can not lighted damp, thereby has guaranteed safety.
As shown in Figure 1, be the schematic diagram of a kind of execution mode of the utility model, realized two frequency converters are moved the protection of change.This device comprises start-stop transducer, auxiliary relay, the time relay and alarm relay.
Wherein, the start-stop transducer comprises the first start-stop transducer KG1 and the second start-stop transducer KG2, the sense terminals of start-stop transducer is installed in respectively on the cable of transformer load side, the signal output part of start-stop transducer KG1, KG2 is connected, and forms the loop respectively with the coil of the first auxiliary relay KA1, the coil of the second auxiliary relay KA2 respectively.
Wherein, auxiliary relay comprises the first auxiliary relay KA1, the second auxiliary relay KA2 and the 3rd auxiliary relay KM2, coil with very first time relay K T1 normally opened contact, alarm relay KM1 after the normally-closed contact parallel connection of the first auxiliary relay KA1 and the second auxiliary relay KA2 is connected in series, and forms the loop;
Wherein, the time relay comprises the very first time relay K T1 and second time relay KT2, and the coil of very first time relay K T1 is connected in series with contactor normally opened contact k1, k2, k3, the k4 of load motor, and forms the loop.After the first auxiliary relay KA1, the second auxiliary relay KA2 normally-closed contact parallel connection with very first time relay K T1 time-delay make war connect and with alarm relay KM1 coil formation loop.The coil of second time relay KT2 is connected with the normally opened contact of alarm relay KM1, and forms the loop.The normally opened contact of second time relay KT2 is connected with the coil of the 3rd auxiliary relay KM2 later with the normally opened contact parallel connection of the 3rd auxiliary relay KM2, and forms the loop.
As shown in Figure 4, be frequency converter door switch connecting circuit figure, the normally-closed contact of the 3rd auxiliary relay KM2 is connected with the door latch switch K of frequency converter.
As shown in Figure 2, be sound and light alarm connecting circuit figure, the normally opened contact of alarm relay KM1 is connected with acoustic-optic alarm D.
As shown in Figure 3, be magnificent light warning connecting circuit figure, the normally opened contact of the 3rd auxiliary relay KM2 is connected with magnificent light crossing-signal.
When frequency converter rectifier cabinet operate as normal, controlled motor normally moves, closure battle of start-stop transducer.The first auxiliary relay KA1 and the second auxiliary relay KA2 get electric, and the normally closed point of the first auxiliary relay KA1 and the second auxiliary relay KA2 disconnects, and alarm relay KM1 circuit disconnects, and does not report to the police.The contactor normally opened contact K1 of load motor, K2, K3, K4 point closure are connected very first time relay K T1, and very first time relay K T1 is closed after 3 minutes in time-delay.The purpose that increases very first time relay is to report to the police when preventing controlled electric motor starting, because load current is little when just having opened controlled motor belt, the start-stop transducer can't adhesive, avoids false alarm in 3 minutes by very first time relay K T1 time-delay.
When separate unit when work appears in rectifier cabinet, that is, wherein during a variable-frequency transformer load side no current, start-stop transducer output point disconnects, the first auxiliary relay KA1 or the second auxiliary relay KA2 dead electricity.The first auxiliary relay KA1 or the second auxiliary relay KA2's is normally closed closed.Very first time relay K T1 is the closed alarm relay KM1 that connects, closed respectively magnificent light alarm point and the acoustic-optic alarm connected of the first auxiliary relay KA1.This moment, the driver and the control room, ore deposit of controlled motor can be found fault simultaneously.Fail in time to find as the staff, this moment alarm relay KM1 closed turn-on time second of the time relay KT2 of making war, second time KT2 time-delay is closed the 3rd auxiliary relay KM2 that connects of its contact KT2 after 3 minutes, and the 3rd auxiliary relay normally-closed contact KM2 disconnects frequency converter door latch switch simultaneously.The concurrent shutdown of being out of order.Because the 3rd auxiliary relay KM2 self-locking battle.Remove fault so must press reset button FA outage, could start shooting again.
Although the utility model is to be described by above-mentioned preferred embodiment, but it realizes only being not limited to above-mentioned execution mode, should be realized that under the situation that does not break away from the utility model spirit and scope those skilled in the art can make different variations and modification to the utility model.
Claims (4)
1. a frequency converter moves the protective device that becomes operation; described device comprises frequency converter, transformer and motor; transformer is powered to motor by frequency converter; it is characterized in that: described device also comprises start-stop transducer, auxiliary relay, alarm relay and acoustic-optic alarm; the sense terminals of described start-stop transducer is installed on the cable of transformer load side; the signal output part of start-stop transducer is connected with the coil of auxiliary relay; the normally-closed contact of auxiliary relay is connected with the coil of alarm relay, and the normally opened contact of alarm relay is electrically connected with acoustic-optic alarm.
2. protective device according to claim 1 is characterized in that: described device also comprises intrinsic safety electric source, is used for providing power supply to the start-stop transducer.
3. protective device according to claim 1; it is characterized in that: described device also comprises the time relay; the coil of the described time relay is connected with the contactor normally opened contact of motor, and the normally opened contact of the described time relay is connected with the coil of alarm relay.
4. protective device according to claim 1, it is characterized in that: described start-stop transducer comprises the first start-stop transducer and the second start-stop transducer, and the sense terminals of the first start-stop transducer and the second start-stop transducer is installed in respectively on the load side cable of two transformers;
Auxiliary relay comprises first auxiliary relay, second auxiliary relay and the 3rd auxiliary relay, the signal output part of the first start-stop transducer is connected with the coil of first auxiliary relay, the signal output part of the second start-stop transducer is connected with the coil of second auxiliary relay, and the coil with very first time relay normally open contact, alarm relay after the normally-closed contact parallel connection of first auxiliary relay and second auxiliary relay is connected in series;
The time relay comprises the very first time relay and second time relay, the coil of very first time relay is connected with the contactor normally opened contact of motor, the time-delay of very first time relay is connected with the coil of warning contactor battle, the coil of second time relay is connected with the normally opened contact of alarm relay, the normally opened contact of second time relay is connected with the coil of the 3rd auxiliary relay later with the normally opened contact parallel connection of the 3rd auxiliary relay, the normally-closed contact of the 3rd auxiliary relay is connected with the door latch switch of frequency converter, and the normally opened contact of alarm relay is connected with acoustic-optic alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203507351U CN201608512U (en) | 2009-12-30 | 2009-12-30 | Device for protecting shift operation of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203507351U CN201608512U (en) | 2009-12-30 | 2009-12-30 | Device for protecting shift operation of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201608512U true CN201608512U (en) | 2010-10-13 |
Family
ID=42953213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203507351U Expired - Lifetime CN201608512U (en) | 2009-12-30 | 2009-12-30 | Device for protecting shift operation of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201608512U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868140A (en) * | 2012-09-07 | 2013-01-09 | 常熟市森源电气科技有限公司 | Overload alarming device for power transformer |
| CN105047494A (en) * | 2015-08-14 | 2015-11-11 | 国家电网公司 | Automatic closing apparatus of low-voltage universal circuit breaker |
| CN106786373A (en) * | 2016-12-31 | 2017-05-31 | 国网山东省电力公司潍坊市寒亭区供电公司 | Power system electricity capacity safety governor |
-
2009
- 2009-12-30 CN CN2009203507351U patent/CN201608512U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868140A (en) * | 2012-09-07 | 2013-01-09 | 常熟市森源电气科技有限公司 | Overload alarming device for power transformer |
| CN105047494A (en) * | 2015-08-14 | 2015-11-11 | 国家电网公司 | Automatic closing apparatus of low-voltage universal circuit breaker |
| CN106786373A (en) * | 2016-12-31 | 2017-05-31 | 国网山东省电力公司潍坊市寒亭区供电公司 | Power system electricity capacity safety governor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101013 |
|
| CX01 | Expiry of patent term |