CN209150013U - A kind of self-locking and resetting apparatus for electronic overload relay - Google Patents
A kind of self-locking and resetting apparatus for electronic overload relay Download PDFInfo
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- CN209150013U CN209150013U CN201821674926.9U CN201821674926U CN209150013U CN 209150013 U CN209150013 U CN 209150013U CN 201821674926 U CN201821674926 U CN 201821674926U CN 209150013 U CN209150013 U CN 209150013U
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Abstract
The utility model discloses a kind of self-locking and resetting apparatuses for electronic overload relay, including relay circuit and power circuit, the power circuit includes+24V and+6V, the input terminal of the relay circuit is connected with the output end of toggle switch circuit, the input terminal of the toggle switch circuit is connected with optically coupled circuit, the output end of the toggle switch circuit is connected with reset circuit, and the optically coupled circuit output end is connected with the input terminal of key switch circuit.The utility model has many advantages, such as that simple structure, definite functions, assembly are simple and low in cost.
Description
Technical field
The utility model relates to a kind of relay fields, are used for electronic overload relay more specifically to one kind
Self-locking and resetting apparatus.
Background technique
Electronic overload relay is combined in the control and protection system of asynchronous machine with A.C. contactor, main
Protection and control action are played to the failures such as the overload occurred in motor circuit, disconnected phase, three-phase imbalance.Electronic overload
The reliability of protection control unit of the relay as motor, control contact signal just becomes particularly important.Existing electricity
The self-locking and reset function of minor overload relay contact signal is realized using a kind of electromagnetic mechanical device, feature
It is that the escape push plate, L-type plate, permanent magnet and automatic resetting iron core connect to form closed magnetic loop device, breaks down
Afterwards by electronic device sending signal to magnetic loop, the contact signal exported by mechanical self-latching structure latches, this machinery
The defects such as the mode that electronic structure combines, mechanical structure assembly process is complicated, and product cost is high, function-stable performance is low.Its
It automatically resets and cooperates to carry out homing action using mechanical structure and double gold plaques Hui Zhengneng after cooling that is heated, due to each machine
Difference between tool part, double gold plaques factors such as after cooling time positive quantity of being heated easily cause product that can not automatically reset and cause defective products
The defects of.
Utility model content
The utility model now provides a kind of at low cost and safe and reliable to operation to overcome the shortcomings of in above-mentioned technology
The advantages that a kind of self-locking and resetting apparatus for electronic overload relay.
A kind of self-locking and resetting apparatus for electronic overload relay of the utility model, including relay circuit and
Power circuit, the power circuit include+24V and+6V, input terminal and the toggle switch circuit of the relay circuit
Output end is connected, and the input terminal of the toggle switch circuit is connected with optically coupled circuit, the toggle switch circuit
Output end is connected with reset circuit, and the optically coupled circuit output end is connected with the input terminal of key switch circuit.
Preferably, the relay circuit include the key 97, four of key 96, three of No.1 key 95, two by
Key 95, relay RL1, diode D1, the No.1 key 95 are connected with No. 9 pins of relay RL1, and described No. two
Key 96 is connected with No. 8 pins of relay RL1, and No. three keys 97 are connected with No. 6 pins of relay RL1,
No. four keys 98 are connected with No. 4 pins of relay RL1, the anode of the diode D1 and the 2 of relay RL1
Number pin is connected, and the cathode of the diode D1 is connected with No. 1 pin of relay RL1 and is connected to+24V together.
95, No. two keys 96 of No.1 key connect the normally-closed contact of relay RL1, simulate normally closed output.No. three keys 97,
No. four keys 98 connect the normally opened contact of relay RL1, simulate normally opened output.
Preferably, the toggle switch circuit includes toggle switch BM1, resistance R1, resistance R4, triode Q1, electricity
Hold C1, one end of the resistance R1 is connected with No. 2 pins of toggle switch BM1, the other end of the resistance R1 and+
24V is connected, and the emitter of the triode Q1 is connected with No. 3 pins of toggle switch BM1, the triode Q1's
Base stage is connected with one end of resistance R4, and the other end of the resistance R4 is connected with one end of capacitor C1, the capacitor
The other end of C1 is connected with+24V, and the node between the resistance R1 and toggle switch BM1 is AUTO1, the triode
Node between Q1 and toggle switch BM1 is AUTO2, and the node between the other end and capacitor C1 of the resistance R4 is AUTO3.
Preferably, the optically coupled circuit includes optocoupler, resistance R2, resistance R3, resistance R5, resistance R6, it is described
One end of resistance R2 is connected with+6V, and the other end of the resistance R2 is connected with No. 1 pin of optocoupler, the resistance
One end of R3 is connected with+24V, and the other end of the resistance R3 is connected with No. 4 pins with optocoupler, the resistance R5
One end be also connected with No. 1 pin of optocoupler, the other end of the resistance R5 is connected with No. 2 pins of optocoupler, described
One end of resistance R6 be connected with No. 3 pins of optocoupler, the collector phase of the other end and triode Q1 of the resistance R6
Connection.
Preferably, the key switch circuit includes key switch SW1, resistance R7, capacitor C2 and triode Q2, institute
One end of the key switch SW1 stated is connected with the collector of triode Q1, the other end and resistance of the key switch SW1
One end of R7 is connected and is grounded together, and the other end of the resistance R7 is connected with the collector of triode Q1, described
One end of capacitor C2 is connected with the collector of triode Q1, and the capacitor C2 other end is connected with the other end of resistance R7
And be grounded together, the collector of the triode Q2 is connected with the other end of resistance R4, the base stage of the triode Q2
It is connected with the collector of triode Q1, the emitter of the triode Q2 is connected with the other end of resistance R7 and connects together
Ground.
Preferably, the reset circuit includes resistance R8, resistance R9, triode Q3 and polar capacitor C3, it is described
The collector of triode Q3 is connected with one end of resistance R8, and the base stage of the triode Q3 is connected with one end of resistance R9
And AUTO3 is accessed together, the emitter of the triode Q3 is connected with the other end of resistance R9 and accesses AUTO2 together,
The other end of the resistance R8 accesses AUTO1, the anode access AUTO1 of the polar capacitor C3, the polar capacitor
The cathode of C3 accesses AUTO2.
The triode Q1 is PNP type triode, and triode Q2 and triode Q3 are NPN type triode.
The working principle of the self-locking and reset circuit of the utility model is: if disconnected phase or overload occurs, fault-signal is logical
After crossing optocoupler U1 progress Phototube Coupling, output drive signal driving triode Q1, triode Q1 base stage conducting leads to triode Q2
It being connected between base stage and emitter, triode Q1, triode Q2 are connected always, circuit pathways are formed, thus realize that circuit is self-locking,
Relay persistently keeps attracting state.Under hand-reset mode (2 feet of toggle switch BM1,3 foot conduction modes), when pressing
When key SW1, latching circuit is disconnected, relay RL1 release conditions, realizes hand-reset function.It (is dialled under the mode of automatically reseting
Under 1 foot of dynamic switch BM1,2 foot conduction modes), after trigger triode Q1, triode Q2 movement, utilize control third electrolysis
Capacitor C3 is self-locking to maintain the conducting circuit of Q1, Q2 to be formed.Due to C3 charge integral action, electric current can be with C3 both end voltage
It increases and gradually decreases, it is last until being unable to maintain that Q1, Q2 can not continue to be connected, so that RL1 release, forms automatic time-delay reset
Function.AUTO3 foot becomes high level, trigger triode Q3 conducting at this time, and the completion so that third electrolytic capacitor C3 discharges immediately is
Movement next time provides delay and prepares.
The utility model has the following beneficial effects:
1, the utility model is mainly used for realizing the self-locking and multiple of the contact signal of the control signal of electronic thermal relay
Position；
2, compared with complicated mechanical structure, the utility model is realized by pure circuit, and structure is simple, definite functions, assembly
Simply, low in cost；
3, the delay time that automatically resets is controlled by capacitor charge and discharge, and the delay precision that automatically resets is higher, the reliability of product
And consistency greatly promotes.
Detailed description of the invention
Attached drawing 1 is the reference circuit schematic diagram of latching circuit described in the utility model and manual reset circuit.
Attached drawing 2 is the reference circuit schematic diagram described in the utility model that automatically resets.
Specific embodiment
Face is by embodiment, and in conjunction with attached drawing, and the technical solutions of the present invention will be further described.
Embodiment: with reference to the accompanying drawings 1 and attached drawing 2 the utility model is further described, one kind of this example is used for electronics
The self-locking and resetting apparatus of formula overload relay, including relay circuit and power circuit, the power circuit include+24V
It is connected with the input terminal of+6V, the relay circuit with the output end of toggle switch circuit, the toggle switch circuit
Input terminal be connected with optically coupled circuit, the output end of the toggle switch circuit is connected with reset circuit, the optocoupler
Circuit output end is closed to be connected with the input terminal of key switch circuit.
The relay circuit includes No.1 key 95, two key 96, three key 97, No. four keys 95, relay
Device RL1, diode D1, the No.1 key 95 are connected with No. 9 pins of relay RL1, No. two keys 96 with
No. 8 pins of relay RL1 are connected, and No. three keys 97 are connected with No. 6 pins of relay RL1, and described four
Number key 98 is connected with No. 4 pins of relay RL1, the anode of the diode D1 and No. 2 pin phases of relay RL1
Connection, the cathode of the diode D1 are connected with No. 1 pin of relay RL1 and are connected to+24V together.
The toggle switch circuit includes toggle switch BM1, resistance R1, resistance R4, triode Q1, capacitor C1, described
One end of resistance R1 be connected with No. 2 pins of toggle switch BM1, the other end of the resistance R1 is connected with+24V,
The emitter of the triode Q1 is connected with No. 3 pins of toggle switch BM1, the base stage and resistance of the triode Q1
One end of R4 is connected, and the other end of the resistance R4 is connected with one end of capacitor C1, the other end of the capacitor C1
Be connected with+24V, the node between the resistance R1 and toggle switch BM1 be AUTO1, the triode Q1 with stir out
Closing the node between BM1 is AUTO2, and the node between the other end and capacitor C1 of the resistance R4 is AUTO3.
The optically coupled circuit includes optocoupler, resistance R2, resistance R3, resistance R5, resistance R6, and the one of the resistance R2
End be connected with+6V, the other end of the resistance R2 is connected with No. 1 pin of optocoupler, one end of the resistance R3 and+
24V is connected, and the other end of the resistance R3 is connected with No. 4 pins with optocoupler, one end of the resistance R5 also with
No. 1 pin of optocoupler is connected, and the other end of the resistance R5 is connected with No. 2 pins of optocoupler, the resistance R6's
One end is connected with No. 3 pins of optocoupler, and the other end of the resistance R6 is connected with the collector of triode Q1.
The key switch circuit includes key switch SW1, resistance R7, capacitor C2 and triode Q2, the key
One end of switch SW1 is connected with the collector of triode Q1, the other end of the key switch SW1 and one end of resistance R7
It is connected and is grounded together, the other end of the resistance R7 is connected with the collector of triode Q1, the capacitor C2's
One end is connected with the collector of triode Q1, and the capacitor C2 other end is connected with the other end of resistance R7 and connects together
The collector on ground, the triode Q2 is connected with the other end of resistance R4, the base stage and triode of the triode Q2
The collector of Q1 is connected, and the emitter of the triode Q2 is connected with the other end of resistance R7 and is grounded together.
The reset circuit includes resistance R8, resistance R9, triode Q3 and polar capacitor C3, the triode Q3's
Collector is connected with one end of resistance R8, and the base stage of the triode Q3 is connected with one end of resistance R9 and accesses together
The emitter of AUTO3, the triode Q3 are connected with the other end of resistance R9 and access AUTO2, the resistance together
The other end of R8 accesses AUTO1, the anode access AUTO1 of the polar capacitor C3, and the cathode of the polar capacitor C3 connects
Enter AUTO2.
Usage mode: if disconnected phase or overload occurs, after fault-signal carries out Phototube Coupling by optocoupler U1, output driving
Signal driving triode Q1, triode Q1 base stage conducting, causes to be connected between triode Q2 base stage and emitter, triode Q1,
Triode Q2 is connected always, forms circuit pathways, to realize that circuit is self-locking, relay persistently keeps attracting state.Manual
Under reset mode (2 feet of toggle switch BM1,3 foot conduction modes), when pressing the button SW1, latching circuit is disconnected, relay
RL1 release conditions realize hand-reset function.(1 foot of toggle switch BM1,2 foot conduction modes under the mode of automatically reseting
Under), after trigger triode Q1, triode Q2 movement, the conducting circuit of Q1, Q2 are maintained using control third electrolytic capacitor C3
It is formed self-locking.Due to C3 charge integral action, electric current can be gradually decreased as C3 both end voltage increases, last until can not
It maintains Q1, Q2 that can not continue to be connected, so that RL1 discharges, forms automatic time-delay reset function.AUTO3 foot becomes high level at this time,
Trigger triode Q3 conducting, the completion so that third electrolytic capacitor C3 discharges immediately provide delay for movement next time and prepare.
The foregoing is merely the structure features of specific embodiment of the utility model, but the utility model to be not limited to
This, in the field of the utility model, made changes or modifications all cover practical new at this any those skilled in the art
Among the scope of the patents of type.
Claims (6)
1. a kind of self-locking and resetting apparatus for electronic overload relay, including relay circuit and power circuit, special
Sign is that the power circuit includes+24V and+6V, the output of the input terminal and toggle switch circuit of the relay circuit
End is connected, and the input terminal of the toggle switch circuit is connected with optically coupled circuit, the output of the toggle switch circuit
End is connected with reset circuit, and the optically coupled circuit output end is connected with the input terminal of key switch circuit.
2. a kind of self-locking and resetting apparatus for electronic overload relay according to claim 1, characterized in that institute
The relay circuit stated includes 97, No. four keys 95, relay RL1, two poles of the key of key 96, three of No.1 key 95, two
Pipe D1, the No.1 key 95 are connected with No. 9 pins of relay RL1, and No. two keys 96 are with relay RL1's
No. 8 pins are connected, and No. three keys 97 are connected with No. 6 pins of relay RL1, No. four keys 98 with after
No. 4 pins of electric appliance RL1 are connected, and the anode of the diode D1 is connected with No. 2 pins of relay RL1, described
The cathode of diode D1 is connected with No. 1 pin of relay RL1 and is connected to+24V together.
3. a kind of self-locking and resetting apparatus for electronic overload relay according to claim 1, characterized in that institute
The toggle switch circuit stated includes toggle switch BM1, resistance R1, resistance R4, triode Q1, capacitor C1, the resistance R1's
One end is connected with No. 2 pins of toggle switch BM1, and the other end of the resistance R1 is connected with+24V, three poles
The emitter of pipe Q1 is connected with No. 3 pins of toggle switch BM1, the base stage and one end phase of resistance R4 of the triode Q1
Connection, the other end of the resistance R4 are connected with one end of capacitor C1, and the other end of the capacitor C1 is connected with+24V
It connects, the node between the resistance R1 and toggle switch BM1 is AUTO1, the section between the triode Q1 and toggle switch BM1
Point is AUTO2, and the node between the other end and capacitor C1 of the resistance R4 is AUTO3.
4. a kind of self-locking and resetting apparatus for electronic overload relay according to claim 3, characterized in that institute
The optically coupled circuit stated includes one end and the+6V phase of optocoupler, resistance R2, resistance R3, resistance R5, resistance R6, the resistance R2
Connection, the other end of the resistance R2 are connected with No. 1 pin of optocoupler, and one end of the resistance R3 is connected with+24V
It connects, the other end of the resistance R3 is connected with No. 4 pins of optocoupler, one end of the resistance R5 also No. 1 with optocoupler
Pin is connected, and the other end of the resistance R5 is connected with No. 2 pins of optocoupler, one end of the resistance R6 and optocoupler
No. 3 pins be connected, the other end of the resistance R6 is connected with the collector of triode Q1.
5. a kind of self-locking and resetting apparatus for electronic overload relay according to claim 3, characterized in that institute
The key switch circuit stated includes key switch SW1, resistance R7, capacitor C2 and triode Q2, and the one of the key switch SW1
End be connected with the collector of triode Q1, the other end of the key switch SW1 be connected with one end of resistance R7 simultaneously one
With ground connection, the other end of the resistance R7 is connected with the collector of triode Q1, one end and three poles of the capacitor C2
The collector of pipe Q1 is connected, and the capacitor C2 other end is connected with the other end of resistance R7 and is grounded together, described
The collector of triode Q2 is connected with the other end of resistance R4, the base stage of the triode Q2 and the collector of triode Q1
It is connected, the emitter of the triode Q2 is connected with the other end of resistance R7 and is grounded together.
6. a kind of self-locking and resetting apparatus for electronic overload relay according to claim 3, characterized in that institute
The reset circuit stated includes the collector and electricity of resistance R8, resistance R9, triode Q3 and polar capacitor C3, the triode Q3
One end of resistance R8 is connected, and the base stage of the triode Q3 is connected with one end of resistance R9 and accesses AUTO3 together, described
The emitter of triode Q3 be connected with the other end of resistance R9 and access AUTO2, the other end of the resistance R8 together
AUTO1 is accessed, the cathode of anode the access AUTO1, the polar capacitor C3 of the polar capacitor C3 access AUTO2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821674926.9U CN209150013U (en) | 2018-10-16 | 2018-10-16 | A kind of self-locking and resetting apparatus for electronic overload relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821674926.9U CN209150013U (en) | 2018-10-16 | 2018-10-16 | A kind of self-locking and resetting apparatus for electronic overload relay |
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| Publication Number | Publication Date |
|---|---|
| CN209150013U true CN209150013U (en) | 2019-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821674926.9U Active CN209150013U (en) | 2018-10-16 | 2018-10-16 | A kind of self-locking and resetting apparatus for electronic overload relay |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706954A (en) * | 2019-09-12 | 2020-01-17 | 恒大智慧充电科技有限公司 | Emergency stop switch circuit and emergency stop and reset method of emergency stop switch |
| CN111477500A (en) * | 2020-03-31 | 2020-07-31 | 南京优倍电气有限公司 | Starting circuit for safety relay compatible with three reset modes |
-
2018
- 2018-10-16 CN CN201821674926.9U patent/CN209150013U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110706954A (en) * | 2019-09-12 | 2020-01-17 | 恒大智慧充电科技有限公司 | Emergency stop switch circuit and emergency stop and reset method of emergency stop switch |
| CN111477500A (en) * | 2020-03-31 | 2020-07-31 | 南京优倍电气有限公司 | Starting circuit for safety relay compatible with three reset modes |
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