CN211579948U - Circuit breaker accessory protection module - Google Patents

Abstract

A breaker accessory protection module is used for being connected with breaker accessories of a breaker and is an independent module comprising a power circuit, the circuit comprises a single chip microcomputer circuit and an accessory monitoring circuit, wherein the accessory monitoring circuit is connected with the single chip microcomputer circuit, a power supply circuit supplies power for the single chip microcomputer circuit and the accessory monitoring circuit, the accessory monitoring circuit is used for connecting a breaker accessory and collecting working voltage of the breaker accessory, the single chip microcomputer circuit judges whether the breaker accessory breaks down according to the working voltage, the circuit further comprises a bus interface circuit connected with the single chip microcomputer circuit, the bus interface circuit is used for being connected with an intelligent controller or a client host, the intelligent controller or the client host can both acquire the working state of the breaker accessory in the single chip microcomputer circuit through the bus interface circuit, and an accessory protection module can directly communicate with the client host through the bus interface circuit to feed back the working.

Description

Circuit breaker accessory protection module

Technical Field

The utility model relates to a low-voltage apparatus field especially relates to a circuit breaker annex protection module.

Background

When the conventional universal circuit breaker is used, the conventional universal circuit breaker can be electrically and automatically applied by matching with corresponding circuit breaker accessories (such as an undervoltage release, a shunt release, a closing electromagnet and an energy storage motor), and the functions of automatic under-voltage release, electric brake opening, electric brake closing and electric energy storage are realized through the circuit breaker accessories.

However, the circuit breaker accessory only realizes the corresponding function of the accessory, if the accessory has a function failure, the accessory can be found only when the accessory is operated on site or overhauled regularly, the requirement of quick response after the product fails cannot be met, and the remote monitoring of the circuit breaker is difficult. Existing circuit breaker accessories are typically used to communicatively couple with the universal circuit breaker.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a circuit breaker annex protection module that can remote monitoring circuit breaker annex state.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a circuit breaker annex protection module for be connected with the circuit breaker annex of circuit breaker, annex protection module is independent module, including power supply circuit, single chip microcomputer circuit and annex monitoring circuit, annex monitoring circuit and single chip microcomputer circuit connection, power supply circuit is single chip microcomputer circuit and annex monitoring circuit power supply, annex monitoring circuit is used for connecting the circuit breaker annex and gathers the operating voltage of circuit breaker annex, whether the circuit breaker annex is broken down is judged according to operating voltage to the single chip microcomputer circuit, still include the bus interface circuit who is connected with the single chip microcomputer circuit, bus interface circuit is used for being connected with intelligent control ware or customer end host computer.

Preferably, the bus interface circuit is RS 485.

Preferably, the bus interface circuit comprises a chip U2, a TXD input terminal, an RXD input terminal and a COM direction control terminal of the chip U2 are respectively connected with a TXDO input terminal, an RXDO input terminal and a CODO input terminal of an RS485 interface, an RGND terminal, an a terminal and a B terminal of the chip U2 are respectively connected with an RGND output terminal, an a + output terminal and a B-output terminal of the RS485 interface, the RGND output terminal is connected with a TVS tube D1, and the other end of the TVS tube D1 is respectively connected with the a + output terminal and the B-output terminal.

Preferably, the model of the chip U2 is RSM 3485.

Preferably, the bus interface circuit is a CAN bus or a Profibus bus.

Preferably, the single chip microcomputer circuit comprises a chip U5, and an oscillation circuit and a reset circuit which are respectively connected with the chip U5, wherein the oscillation circuit can form oscillation pulses to enable the chip U5 to operate orderly according to oscillation beats, the reset circuit can form an integration circuit, and reset pulses are generated at the moment of power-on to enable the chip U5 to reset; the oscillating circuit comprises a crystal oscillator X1, one end of a crystal oscillator X1 is connected with a capacitor C11 and a PFO terminal of a chip U5 respectively, the other end of the crystal oscillator X1 is connected with a capacitor C14 and a PF1 terminal of a chip U5 respectively, and the other ends of the capacitor C11 and the capacitor C14 are grounded respectively; the reset circuit comprises a resistor R29 and a capacitor C15, one end of the resistor R29 is connected with the capacitor C15 and the NRST terminal of the chip U5, and the other end of the capacitor R29 is connected with the VBAT terminal of the chip U5.

Preferably, the power circuit comprises a filter circuit, a DC/DC conversion circuit and an LDO circuit; the filter circuit comprises a fuse F1 connected with a VIN + input end of the power circuit, the other end of the fuse F1 is respectively connected with an inductor L1 and a piezoresistor RV1, the other end of the piezoresistor RV1 is connected with a VIN-input end of the power circuit, the other end of the inductor L1 is connected with the anode of a diode D4, the cathode of the diode D4 is respectively connected with the anode of an electrolytic capacitor C5 and the anode of a ceramic capacitor C2, and the cathode of the electrolytic capacitor C5 and the cathode of the ceramic capacitor C2 are respectively connected with the VIN-input end of the power circuit; the DC \ DC conversion circuit comprises a chip U1, a first pin and a third pin of a chip U1 are respectively connected with a VIN + output end of a power circuit and a VIN-output end of the power circuit through a filter circuit, a second pin of the chip U1 is respectively connected with a fast recovery diode DZ1 and an inductor L2, the other end of the fast recovery diode DZ1 is grounded, the other end of the inductor L2, an electrolytic capacitor C7, a ceramic capacitor C6 and a transient suppression diode TVS1 are respectively connected with a fourth pin of the chip U1, and a fifth pin of the chip U1 is grounded; the LDO circuit comprises a chip U4, a first pin of a chip U4 is connected with a fourth pin of a chip U1, a fifth pin of the chip U4 is connected with an output end of a capacitor C3, an output end of a capacitor C4 and an output end of a power circuit, and the other ends of the capacitor C3 and the capacitor C4 are respectively grounded.

Preferably, the conventional circuit breaker detected by the accessory protection module comprises a plurality of circuit breaker accessories, the circuit breaker accessories are respectively a first accessory or a second accessory, and the accessory monitoring circuit comprises a first monitoring circuit for monitoring working voltages at two ends of the first accessory and a second monitoring circuit for monitoring working voltages at two ends of the second accessory.

Preferably, the first monitoring circuit comprises a differential amplifying circuit, the differential amplifying circuit comprises an operational amplifier U, an output end of the operational amplifier U is connected with an input end of the single chip microcomputer circuit through a resistor R6, a non-inverting input end of the operational amplifier U is respectively connected with a resistor R1 and a resistor R2, the other end of the resistor R1 is grounded, the other end of the resistor R2 is sequentially connected with a negative electrode of a diode D2 through a resistor R3, a resistor R4 and a resistor R5, an anode of the diode D2 is connected with one input end of the differential amplifying circuit, a negative input end of the operational amplifier U is respectively connected with a resistor R12 and a resistor R8, the other end of the resistor R12 is connected with an output end of the operational amplifier U, the other end of the resistor R8 is sequentially connected with an anode of a diode D3 through a resistor R9, a resistor R10 and a resistor R11, and a cathode of the diode D3.

Preferably, the second monitoring circuit includes an optocoupler U11, the optocoupler U11 includes a light emitting diode and an output triode which are matched with each other, an anode and a cathode of the light emitting diode of the optocoupler U11 are respectively two input ends of the optocoupler U11, two ends of the output triode are respectively two output ends of the optocoupler U11, an anode of the light emitting diode of the optocoupler U11 is sequentially connected with a power input end of the second accessory through a resistor R77, a zener diode DZ6, a resistor R78, a resistor R79, a resistor R80 and a diode D11, a cathode of the light emitting diode of the optocoupler U11 is also connected with the power input end of the second accessory through a resistor R83, one end of an output triode of the optocoupler U11 is connected with the power circuit through a resistor R81, the other end of the output triode of the optocoupler U11 is respectively connected with an input end of the singlechip circuit and the resistor R84.

The utility model discloses a circuit breaker annex protection module, intelligent control ware or customer end host computer can both acquire the operating condition of the circuit breaker annex in the single chip microcomputer circuit through bus interface circuit, and annex protection module can be through the operating condition of bus interface circuit direct and customer end host computer communication feedback circuit breaker annex, need not through intelligent control ware, can reduce intelligent control ware's work, the compatible current circuit breaker annex protection module of being convenient for moreover.

Drawings

Fig. 1 is a structural diagram of an accessory protection module according to a first embodiment of the present invention;

fig. 2 is a first operation mode of the first embodiment of the present invention;

fig. 3 is a circuit diagram of a first monitoring circuit according to an embodiment of the present invention;

fig. 4 is a circuit diagram of a second monitoring circuit according to an embodiment of the present invention;

FIG. 5 is a circuit diagram of the single chip circuit according to the embodiment of the present invention;

fig. 6 is a circuit diagram of a power circuit according to an embodiment of the present invention;

fig. 7 is a circuit diagram of a bus interface circuit according to an embodiment of the present invention;

fig. 8 is a circuit diagram of an LED indicating circuit according to an embodiment of the present invention;

fig. 9 is a structural diagram of an accessory protection module according to a second embodiment of the present invention;

fig. 10 illustrates a first operation mode of a second embodiment of the present invention;

fig. 11 shows a second operation mode of the second embodiment of the present invention;

FIG. 12 is a circuit diagram of an accessory monitoring circuit and an accessory control circuit according to an embodiment of the present invention;

fig. 13 is a structural diagram of an accessory protection module according to a third embodiment of the present invention;

fig. 14 shows a first operation mode of a third embodiment of the present invention;

fig. 15 shows a second operation mode of the third embodiment of the present invention;

fig. 16 is a circuit diagram of a DI input detection circuit according to an embodiment of the present invention;

fig. 17 is a circuit diagram of a DO output circuit according to an embodiment of the present invention;

fig. 18 is a circuit diagram of a switch state detection circuit according to an embodiment of the present invention.

Detailed Description

The following description will further describe a specific embodiment of the circuit breaker accessory protection module according to the present invention with reference to the embodiments shown in fig. 1 to 18. The circuit breaker accessory protection module of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1 and 2, the utility model discloses a circuit breaker includes the drawer seat and sets up circuit breaker body 1 and annex protection module 2 in the drawer seat, circuit breaker body 1 includes intelligent control ware 11 and circuit breaker annex, annex protection module 2 includes power supply circuit 22, singlechip circuit 23 and annex monitoring circuit 24, annex monitoring circuit 24 is connected with singlechip circuit 23, power supply circuit 22 is singlechip circuit 23 and the power supply of annex monitoring circuit 24, annex monitoring circuit 24 is used for connecting the circuit breaker annex and gathers the operating voltage of circuit breaker annex, singlechip circuit 23 judges whether the circuit breaker annex breaks down according to operating voltage.

The utility model discloses a circuit breaker annex protection module, through the operating voltage of 24 monitoring circuit breaker annexs of annex monitoring circuit to calculate the operating condition of circuit breaker annex through singlechip circuit 23, can in time make the response if the circuit breaker annex breaks down.

Further, the accessory protection module 2 is an independent module, the accessory protection module 2 further includes a bus interface circuit 21 connected with the single chip microcomputer circuit 23, and the bus interface circuit 21 is used for being connected with the intelligent controller 11 of the circuit breaker body 1 or a client host. The intelligent controller 11 or the client host can acquire the working state of the circuit breaker accessory in the single chip circuit 23 through the bus interface circuit 21, so that the intelligent controller 11 can automatically check the circuit breaker accessory according to the information of the accessory protection module 2 during working.

Further, the accessory protection module 2 further includes an LED indication circuit 20 connected to the single chip microcomputer circuit 23, and the single chip microcomputer circuit 23 can indicate the operating state of the circuit breaker accessory through the LED indication circuit 20.

As shown in fig. 2, which illustrates an embodiment of the accessory protection module 2, the circuit breaker body 1 includes a plurality of circuit breaker accessories, which are first accessories or second accessories, respectively, and the accessory monitoring circuit 24 includes a first monitoring circuit for monitoring an operating voltage across the first accessory and a second monitoring circuit for monitoring an operating voltage across the second accessory. Of course, a plurality of circuit breaker accessories may also be the first accessory, or be the second accessory, all belong to the scope of protection of the present invention.

Further, the first monitoring circuit comprises a differential amplifying circuit, the input end of the differential amplifying circuit is connected with the power input end of the first accessory, the output end of the differential amplifying circuit is connected with the single chip microcomputer circuit 23, whether the first accessory is in fault or not is judged through the single chip microcomputer circuit 23, the single chip microcomputer circuit 23 comprises an MCU and an A/D converter, the differential amplifying circuit converts a voltage signal at the power end of the first accessory into a proportional AD signal, the single chip microcomputer circuit 23 obtains a voltage effective value based on a signal of the accessory monitoring circuit 24, and whether the first accessory is in fault or not is judged according to the obtained voltage effective value.

Further, second monitoring circuit includes the opto-coupler, and two inputs of opto-coupler are connected with the power input end of second annex respectively for whether monitoring circuit breaker annex has operating voltage to exist, and two outputs of opto-coupler are connected with singlechip circuit 23 and power supply circuit 22's input respectively, and two inputs of opto-coupler can switch on when operating voltage exists in the second annex, and form the route between two inputs of opto-coupler, make power supply circuit 22 be singlechip circuit 23 output signal through two inputs of opto-coupler.

As shown in fig. 2 and 3, a preferred embodiment of the first monitoring circuit is that the first accessory is an undervoltage release 12, the first monitoring circuit is an undervoltage monitoring circuit 244, the first monitoring circuit includes a differential amplifier circuit including an operational amplifier U3A, an output terminal of the operational amplifier U3A is connected to an input terminal of the single chip microcomputer 23 through a resistor R6, a non-inverting input terminal of the operational amplifier U3A is connected to a resistor R1 and a resistor R2, the other end of the resistor R1 is grounded, the other end of the resistor R2 is connected to a negative electrode of a diode D2 through a resistor R3, a resistor R4 and a resistor R5 in sequence, an anode of a diode D2 is connected to one input terminal of the differential amplifier circuit, a negative input terminal of the operational amplifier U3A is connected to a resistor R12 and a resistor R8 in sequence, the other end of the resistor R12 is connected to an output terminal of the operational amplifier U3A, the other end of the resistor R8 is connected to a positive electrode of a diode R9, a resistor, the cathode of the diode D3 is connected to the other input terminal of the differential amplification circuit. Generally, the action characteristic of the undervoltage release is that the undervoltage release can be reliably released when the voltage of a power supply terminal is 0.35Ue, and the undervoltage release can be reliably attracted when the voltage of the power supply terminal is 0.7 Ue. The single chip circuit 23 compares the voltage effective value obtained from the signal of the accessory monitoring circuit 24 with a preset undervoltage threshold value, and determines whether the undervoltage release 12 has a fault, and if the voltage effective value is lower than the minimum undervoltage threshold value, the undervoltage release is considered to have a fault.

Further, the first monitoring circuit further comprises a resistor R7 and a capacitor C1 which are connected in parallel, one end of the resistor R7 and the capacitor C1 which are connected in parallel is connected with the resistor R9, and the other end of the resistor R7 and the capacitor C1 which are connected in parallel is connected with the resistor R3.

Fig. 2 and 4 show a preferred embodiment of the second monitoring circuit, which includes a plurality of second accessories and a plurality of second monitoring circuits, the operating principle of the plurality of second monitoring circuits is the same, for example, the plurality of second accessories are respectively the shunt release 13, the closing electromagnet 14 and the storage motor 15, the plurality of second monitoring circuits are respectively the shunt monitoring circuit 245 connected with the shunt release 13, the closing monitoring circuit 246 connected with the closing electromagnet 14 and the motor monitoring circuit 247 connected with the storage motor 15.

The second monitoring circuit comprises an optocoupler U11, the optocoupler U11 comprises a light emitting diode and an output triode which are matched, the anode and the cathode of the light emitting diode of the optocoupler U11 are respectively two input ends of the optocoupler U11, two ends of the output triode are respectively two output ends of the optocoupler U11, the anode of the light emitting diode of the optocoupler U11 sequentially passes through a resistor R77, a voltage stabilizing diode DZ6, a resistor R78, a resistor R79, a resistor R80 and a diode D11 to be connected with the power input end of the second accessory, the cathode of the light emitting diode of the optocoupler U11 also passes through a resistor R83 to be connected with the power input end of the second accessory, one end of the output triode of the optocoupler U11 passes through a resistor R81 to be connected with the power circuit 22, the other end of the output triode of the optocoupler U11 is respectively connected with the input end of the singlechip circuit 23 and the.

Further, the second monitoring circuit further comprises a resistor R82 and a capacitor C19 which are connected in parallel, one end of the resistor R82 and the capacitor C19 which are connected in parallel are connected with the anode of the voltage stabilizing diode DZ6, and the other end of the resistor R82 and the capacitor C19 which are connected in parallel are connected with the resistor R83.

The shunt monitoring circuit 245, the close monitoring circuit 246 and the motor monitoring circuit 247 have the same working principle and are only used for monitoring different circuit breaker accessories, and the diode D11 and the resistor R83 are respectively connected with power supply input ends connected with the corresponding circuit breaker accessories.

As shown in fig. 5, a preferred embodiment of the one-chip microcomputer circuit 23 is shown, where the one-chip microcomputer circuit 23 includes a chip U5, and an oscillator circuit and a reset circuit connected to the chip U5, respectively, where the model of the chip U5 is preferably STM32F051, the oscillator circuit is capable of forming an oscillation pulse to enable the chip U5 to operate in order according to an oscillation beat, and the reset circuit is capable of forming an integrator circuit to generate a reset pulse at the moment of power-on to enable the chip U5 to reset.

Further, the oscillation circuit comprises a crystal oscillator X1, one end of a crystal oscillator X1 is connected with a capacitor C11 and a PFO terminal of a chip U5 respectively, the other end of the crystal oscillator X1 is connected with a capacitor C14 and a PF1 terminal of a chip U5 respectively, and the other ends of the capacitor C11 and the capacitor C14 are grounded respectively; the reset circuit comprises a resistor R29 and a capacitor C15, one end of the resistor R29 is connected with the capacitor C15 and the NRST terminal of the chip U5, and the other end of the capacitor R29 is connected with the VBAT terminal of the chip U5.

As shown in fig. 6, a preferred embodiment of the power circuit 22, the power circuit 22 includes a filter circuit, a DC/DC conversion circuit and an LDO circuit. Specifically, the filter circuit comprises a fuse F1 connected with a VIN + input end of the power circuit 22, the other end of the fuse F1 is connected with an inductor L1 and a piezoresistor RV1 respectively, the other end of the piezoresistor RV1 is connected with a VIN-input end of the power circuit 22, the other end of the inductor L1 is connected with an anode of a diode D4, a cathode of the diode D4 is connected with an anode of an electrolytic capacitor C5 and one end of a ceramic capacitor C2 respectively, and a cathode of the electrolytic capacitor C5 and the other end of the ceramic capacitor C2 are connected with the VIN-input end of the power circuit 22 respectively.

The DC/DC conversion circuit comprises a chip U1, the chip U1 is preferably an LM2575 integrated circuit, a first pin (Vin) and a third pin (GND) of the chip U1 are respectively connected with a VIN + output end of a power circuit 22 and a VIN-output end of the power circuit 22 through a filter circuit, a second pin (Vout) of the chip U1 is respectively connected with a fast recovery diode DZ1 and an inductor L2, the other end of the fast recovery diode DZ1 is grounded, the other end of the inductor L2, an electrolytic capacitor C7, a ceramic capacitor C6 and a transient suppression diode TVS1 are respectively connected with a fourth pin (Feedback) of the chip U1, and a fifth pin (/ ON/OFF) of the chip U1 is grounded and is in a always-enabled state.

The LDO circuit comprises a chip U4, a chip U4 is preferably an SPX5205 integrated circuit, a first pin (Vin) of the chip U4 is connected with a fourth pin of the chip U1, a fifth pin (Vout) of the chip U4 is respectively connected with an output end of a capacitor C3, a capacitor C4 and an output end of a power supply circuit 22, and the other ends of the capacitor C3 and the capacitor C4 are respectively grounded.

As shown in FIG. 7, a preferred embodiment of the bus interface circuit 21 is shown, the bus interface circuit 21 is of an isolated RS485 type, the bus interface circuit 21 includes a chip U2, the model of the chip U2 is preferably RSM3485, a TXD input terminal, a RXD input terminal and a COM direction control terminal of the chip U2 are respectively connected with the TXDO input terminal, the RXDO input terminal and the CODO input terminal of the RS485 interface, an RGND terminal, an A terminal and a B terminal of the chip U2 are respectively connected with the RGND output terminal, an A + output terminal and a B-output terminal of the RS485 interface, the RGND output terminal is connected with a TVS tube D1, and the other end of the TVS tube D1 is respectively connected with the A + output terminal and the. Of course, the bus interface circuit 21 may also be of the CAN or Profibus type from RS485, all falling within the scope of the present invention.

As shown in fig. 8, which shows a preferred embodiment of the LED indicating circuit 20, the LED indicating circuit 20 includes a plurality of light emitting diodes, one ends of the light emitting diodes are respectively connected to the power circuit 22, the other ends of the light emitting diodes are respectively connected to the single chip circuit 23 through resistors, and different terminals of the single chip circuit 23 are connected to indicate states of different circuit breaker accessories, the light emitting diodes emit light when the single chip circuit 23 outputs a high level, and the light emitting diodes are turned off when the single chip circuit 23 outputs a low level.

Example one

As shown in fig. 1, the accessory protection module 2 includes an under-voltage monitoring circuit 244, a shunt monitoring circuit 245, a close monitoring circuit 246, and a motor monitoring circuit 247 respectively connected to the single chip microcomputer circuit 23, and further includes a position detection circuit 240 connected to the close monitoring circuit 246, where the position detection circuit 240 is connected to the single chip microcomputer circuit 23 and is configured to detect a switching state of the circuit breaker body 1. Normally, the position detection circuit 240 cooperates with the micro switch to detect the position of mechanical action in the circuit breaker and determine whether the action is in place, and the position detection circuit 240 is connected with the micro switch to provide signals for the single chip circuit 23.

As shown in fig. 2, which illustrates a first operation mode of the accessory protection module 2, the bus interface circuit 21 of the accessory protection module 2 is connected to the internal bus of the intelligent controller 11, and the external bus of the intelligent controller 11 is connected to the background monitoring software. The accessory protection module 2 monitors the state of each breaker accessory in real time and feeds the state back to the single chip microcomputer circuit 23 for storage, the intelligent controller 11 inquires (accesses) the state information of the breaker accessories in the single chip microcomputer circuit 23 at intervals (such as 1 second), and the intelligent controller 11 processes the inquiry result in advance and then transmits the data to background monitoring software through an external bus.

Example two

As shown in fig. 9, the accessory protection module 2 includes an accessory monitoring circuit 24 connected to the single chip circuit 23, and further includes an accessory control circuit 26 connected to the single chip circuit 23, where the accessory control circuit 26 includes a relay connected to a power input terminal of the circuit breaker accessory, and the single chip circuit 23 controls the circuit breaker accessory to be powered off through the relay of the accessory control circuit 26 when the circuit breaker accessory fails.

The accessory protection module 2 is matched with the circuit breaker accessory through the accessory control circuit 26, the circuit breaker accessory is powered off when the circuit breaker accessory fails, damage caused by long-time electrification when the circuit breaker accessory fails is prevented, and for example, damage caused by long-time electrification of equipment such as an energy storage motor 15 of the circuit breaker when the circuit breaker accessory fails can be prevented.

Further, the accessory protection module 2 further comprises an accessory monitoring circuit 25, and the accessory monitoring circuit 25 is connected with the single chip circuit 23 and the circuit breaker accessory and used for connecting the circuit breaker accessory and collecting working current of the circuit breaker accessory. The accessory monitoring circuit 25 comprises a monitoring resistor connected with the accessory of the circuit breaker in series and a voltage amplifying circuit connected with two ends of the monitoring resistor, the voltage amplifying circuit can amplify voltage drops at two ends of the monitoring resistor and then send the voltage drops to the single chip microcomputer circuit 23, and the single chip microcomputer circuit 23 calculates working current of the accessory of the circuit breaker based on signals provided by the accessory monitoring circuit 25 and judges whether the accessory of the circuit breaker works normally. If the circuit breaker accessory is normally connected and the disconnection condition does not exist, a working current is generated; on the contrary, if the breaker accessory breaks down, no working current is generated, and the breaker accessory breaks down.

The accessory monitoring circuit 24 is used for collecting voltage at two ends of an accessory (such as a closed electromagnet) of the circuit breaker, and the accessory monitoring circuit 25 is used for collecting (flowing through the electromagnet) current, for example, the input end 31 and the input end 32 of the accessory monitoring circuit 24 are respectively connected with two terminals of an electromagnet coil of the closed electromagnet, the input end 32 of the accessory control circuit 26 is connected with one end of the electromagnet coil, the other end of the electromagnet coil is connected with power voltage, the electromagnet coil is connected in series into the power voltage, the function of collecting the current of the electromagnet coil is achieved, when the electromagnetic coil is detected to be electrified for a long time, a coil loop can be disconnected with a power supply through the accessory control circuit 26, and the advantage of protecting the coil from heat damage is achieved.

The accessory protection module 2 of the embodiment can not only cut off the power of the breaker accessories through the accessory control circuit 26 when the breaker accessories are in fault, but also the accessory monitoring circuit 25 can monitor the working state of the breaker accessories through the accessory control circuit 26, so that the reliability of the breaker is greatly improved.

As shown in fig. 9 and 10, the present embodiment includes a plurality of circuit breaker accessories and a plurality of accessory control circuits 26, the plurality of circuit breaker accessories are respectively first accessories or second accessories, the plurality of accessory control circuits 26 are used for respectively controlling the plurality of second accessories, and the operation principle of the plurality of accessory control circuits 26 is the same.

The plurality of second accessories are respectively a shunt release 13, a closed electromagnet 14 and an energy storage motor 15, the plurality of accessory control circuits 26 are respectively a shunt control circuit connected with the shunt release 13, a closed control circuit connected with the closed electromagnet 14 and a motor control circuit connected with the energy storage motor 15, the shunt control circuit, the closed control circuit and the motor control circuit have the same working principle and are only used for controlling different circuit breaker accessories, and relays of the shunt control circuit, the closed control circuit and the motor control circuit are respectively connected with power input ends of corresponding circuit breaker accessories.

Further, the multifunctional intelligent circuit breaker comprises a plurality of accessory monitoring circuits 25, wherein the accessory monitoring circuits 25 are used for monitoring a plurality of second accessories respectively, the operating principles of the accessory monitoring circuits 25 are the same, the accessory monitoring circuits 25 are respectively a shunt excitation monitoring circuit of a tripper connected with a shunt excitation control circuit, a closing monitoring circuit of the tripper connected with a closing control circuit and a motor control circuit of the tripper connected with the motor control circuit, the operating principles of the shunt excitation monitoring circuit, the monitoring circuits and the motor control circuit are the same and are only used for monitoring different circuit breaker accessories, and the input ends of voltage amplifying circuits of the shunt excitation monitoring circuit, the monitoring circuits and the motor control circuit are connected with the corresponding accessory monitoring circuits 25 respectively.

Fig. 12 shows a preferred embodiment of the accessory control circuit 26 and the accessory monitoring circuit 25, wherein the accessory control circuit 26 includes a relay K1, one end of a normally closed contact of the relay K1 is connected to a live wire through a circuit breaker accessory, the other end of the normally closed contact of the relay K1 is connected to a zero line through a resistor R53, two ends of a coil of the relay K1 are connected in parallel to a diode D8, one end of a coil of the relay K1 is connected to a power supply, the other end of the coil of the relay K1 is connected to a collector of a transistor Q1, an emitter of the transistor Q1 is grounded, and a base of the transistor Q6 is connected to the single chip microcomputer circuit 23 through a resistor R52.

The power supply of circuit breaker annex is controlled through relay K1 to this embodiment, and when singlechip circuit 23 exported the high level, relay K1 normally closed contact disconnection, and the circuit breaker annex loses the electricity, and when singlechip circuit 23 exported the low level, relay K1 normally closed electric shock was closed, and the circuit breaker annex is electrified.

As shown in fig. 12, a preferred embodiment of the accessory monitoring circuit 25 is shown, where the accessory monitoring circuit 25 includes a monitoring resistor and a voltage amplifying circuit, the voltage amplifying circuit includes a first voltage amplifying circuit and a second voltage amplifying circuit, the first voltage amplifying circuit is connected to two ends of the monitoring resistor, the second voltage amplifying circuit is connected to an output end of the first voltage amplifying circuit, and a voltage drop across the monitoring resistor is amplified twice by the first voltage amplifying circuit and the second voltage amplifying circuit and then transmitted to the single chip microcomputer circuit 23.

Preferably, the monitor resistor is a resistor R53 connected in series with the relay K1 of the accessory control circuit 26, although the monitor resistor may not be connected in series with the relay K1.

Specifically, one end of the resistor R53 is connected in series with a relay K1 of the accessory control circuit 26, the first voltage amplifying circuit includes an operational amplifier U3AA, the second voltage amplifying circuit includes an operational amplifier U3BB, an inverting input terminal and a non-inverting input terminal of the operational amplifier U3AA are connected with two ends of the resistor R53 through a resistor R48 and a resistor R57, respectively, the inverting input terminal of the operational amplifier U3AA is connected with an output terminal of the operational amplifier U3AA through a resistor R41, and the non-inverting input terminal of the operational amplifier U3AA is connected with a voltage reference terminal through a resistor R58 (1.5V); the inverting input end of the operational amplifier U3BB is connected with the output end of the operational amplifier U3AA through a resistor R50, the non-inverting input end of the operational amplifier U3BB is connected with a voltage reference end (1.5V) through a resistor R56, the output end of the operational amplifier U3BB is respectively connected with a resistor R51 and a resistor R42, the other end of the resistor R51 is connected with the single chip microcomputer circuit 23, and the other end of the resistor R42 is connected with the inverting input end of the operational amplifier U3 BB.

When the relay K1 is closed, current passes through the resistor R53, so that voltage drop exists at two ends of the resistor R53, the voltage drop is amplified through two-stage operation and amplification, the amplified signal is input to an AD port of the single chip microcomputer circuit 23, the working current of the accessories of the circuit breaker is calculated through the single chip microcomputer circuit 23 based on the obtained AD signal of the accessory monitoring circuit 25, and whether the accessories of the circuit breaker normally work, for example, whether the accessories of the circuit breaker normally close is judged.

As shown in fig. 10, which illustrates a first operation mode of the accessory protection module 2, the bus interface circuit 21 of the accessory protection module 2 is connected to the internal bus of the intelligent controller 11, and the external bus of the intelligent controller 11 is connected to the background monitoring software. The accessory protection module 2 monitors the state of each breaker accessory in real time and transmits the state to the single chip microcomputer circuit 23 for storage, the intelligent controller 11 inquires (accesses) the state information of the breaker accessories in the single chip microcomputer circuit 23 at intervals (such as 1 second), and the intelligent controller 11 processes the inquiry result in advance and transmits the data to background monitoring software through an external bus. The background monitoring software can be cloud service, or an upper PC, or a mobile phone APP and the like.

As shown in fig. 11, a second working mode of the accessory protection module 2 is that the accessory protection module 2 is connected to an upper computer (client host) through a bus interface circuit 21, and background software of the upper computer monitors the state of each circuit breaker accessory in real time through the bus interface circuit 21, and can perform power-off control on each circuit breaker accessory through an accessory control circuit 26, so as to prevent individual accessories from being damaged due to long-time power-on.

EXAMPLE III

As shown in fig. 13, the accessory protection module 2 further includes a programmable logic interface circuit 29, the programmable logic interface circuit 29 includes a DI input detection circuit and a DO output circuit, an output terminal of the DI input detection circuit and an input terminal of the DO output circuit are respectively connected to the single chip microcomputer circuit 23, the input terminal of the DI input detection circuit and the output terminal of the DO output circuit are respectively connected to a DI input signal \ DO output of a user, the single chip microcomputer circuit 23 can recognize an input signal of the DI input detection circuit, and the single chip microcomputer circuit 23 can control an output signal of the DO output circuit.

The single chip circuit 23 can identify the input signal of the DI input detection circuit and control the output signal of the DO output circuit, and a user can perform various self-defining settings through the programmable logic interface circuit 29, for example, a serial port instruction sent by the intelligent controller 11 controls the relay K4 of the DO output circuit to act, so that the functions of circuit breaker area interlocking, remote opening and closing and the like are realized, the difficulty of installation, maintenance and debugging can be reduced, and the use is more convenient.

Further, accessory protection module 2 still includes drawer seat position detection circuitry 28, breaker body 1 needs to move between the isolated position of drawer seat when using, experimental position and hookup location, in order to realize the disconnection, experimental and switch on breaker body 1, drawer seat position detection circuitry 28 includes three micro-gap switch that sets up respectively on isolated position, experimental position and hookup location, and the three detection circuitry that triggers who is connected with three micro-gap switch respectively, three detection circuitry that triggers is connected with singlechip circuit 23 respectively, move to isolated position respectively at breaker body 1, when experimental position and hookup location, trigger the micro-gap switch that corresponds the position, through triggering detection circuitry output signal to singlechip circuit 23, with the position of real-time detection breaker body 1 in the drawer seat. The drawer base position detection circuit 28 is the same as the position detection circuit 240.

Further, the accessory protection module 2 further comprises a switch state detection circuit 27 connected with the single chip microcomputer circuit 23, the switch state detection circuit 27 is used for being connected with a switch state microswitch of the circuit breaker body 1, the switch state microswitch is matched with a main contact of the circuit breaker body 1 to indicate the position of the main contact and transmits the position to the single chip microcomputer circuit 23, the switch-on and switch-off states of the circuit breaker are monitored through the switch state microswitch, and when the circuit breaker body 1 is switched on, the switch state microswitch is kept switched on; when the breaker body 1 is opened, the on-off state micro switch keeps off. The on-off state micro switch is arranged on the breaker body, the working state of the on-off state micro switch is the same as the main contact state of the breaker, namely, the on-off state micro switch can be triggered to keep on when the breaker is switched on, and the on-off state micro switch keeps off when the breaker is switched off.

As shown in fig. 18, the switching state detection circuit 27 operates on the same principle as the position detection circuit 240, the trigger detection circuit and the second monitoring circuit, except that the input of the detection circuit is changed, the power source L is connected to the input terminal of the switching state detection circuit 27 after passing through the microswitch WD1 synchronized with the circuit breaker, and the other input terminal of the switching state detection circuit 27 is connected to the power source N; when the microswitch WD1 is closed, a PB1 point output by the optical coupler is at a high level; when the micro switch is turned off, the PB1 point of the optical coupler output is low level.

As shown in fig. 16, in a preferred embodiment of the DI input detection circuit, the single chip microcomputer circuit 23 can recognize an input signal of the DI input detection circuit, and the single chip microcomputer circuit 23 can control an output signal of the DO output circuit, the DI input detection circuit includes a light coupler U30, the light coupler U30 includes a light emitting diode and an output triode which are matched, an anode of the light emitting diode of the light coupler U30 is connected to a J7 input end of the DI input detection circuit through a resistor R32, a resistor R33, a resistor R34, a resistor R35, a resistor R36 and a resistor R37 in sequence, a cathode of the light emitting diode of the light coupler U30 is connected to a J8 input end of the DI input detection circuit, one end of the output triode of the light coupler U30 is connected to the power supply circuit 22, the other end of the output triode of the light coupler U30 is connected to an IO port and a resistor R25 of the single chip. The user can carry out multiple self-defining settings through DO output circuit output, also can be used for exporting the operating condition of circuit breaker annex through DO output circuit, for example the operating condition of circuit breaker annex, output fault signal when circuit breaker annex trouble, also can be the signal that is used for controlling other circuit breakers, realizes functions such as regional interlocking.

A voltage state detection circuit is formed by the optocoupler U30, when voltage is input from the outside, the E electrode of the output triode of the optocoupler U30 is at a high level, and otherwise, the output triode is at a low level. The single chip microcomputer circuit 23 identifies the state of the DI input detection circuit by judging the level of the E pole of the output triode of the optocoupler U30. The illustration shows only one path, and in practical application, the multiple DI input detection circuits may be respectively connected to the single chip circuit 23.

Fig. 17 shows a preferred embodiment of the DO output circuit, which includes a relay K4, a transistor Q30 and an optocoupler U90, wherein two ends of a normally open contact of the relay K4 are respectively connected with two output ends of the DO output circuit, coils of the transistor Q30 and the relay K4 are connected in series with a power supply, and the optocoupler U90 can turn on the transistor Q30 through a base of the transistor Q30, so that the coil of the relay K4 is electrified to attract the normally open contact of the relay K4 to act;

the optocoupler U90 comprises a light emitting diode and an output triode which are matched, one end of the light emitting diode of the optocoupler U90 is connected with the power circuit 22 through a resistor R800, the other end of the light emitting diode of the optocoupler U90 is connected with the I/O of the singlechip circuit 23, the E pole of the output triode of the optocoupler U90 is grounded, the collector electrode of the output triode of the optocoupler U90 is connected with the base electrode of the triode Q30, one end of the coil of the relay K4 is respectively connected with a power supply, the anode of the diode D30 is connected with a resistor R30, the other end of the coil of the relay K4 is respectively connected with the collector electrode of the triode Q30 and the cathode of the diode D30, the other end of the resistor R30 is connected with the base electrode of the. When the I \ O port of the singlechip circuit 23 outputs a high level, the normally open contact of the relay K4 is attracted, and otherwise, the normally open contact of the relay K4 is disconnected. The illustration shows only one way, and the practical application may be a multi-way DO output circuit.

As a preferred embodiment of the drawer base position detection circuit 28, the drawer base position detection circuit 28 includes a separation microswitch, a test microswitch and a connection microswitch which are respectively provided at the separation position, the test position and the connection position to be engaged with the circuit breaker body 1, and the separation trigger circuit, the test trigger circuit and the connection trigger circuit are respectively used for detecting whether voltage exists between the separation microswitch, the test microswitch and the connection microswitch and between the zero line.

When the circuit breaker body 1 moves to the separation position, the test position and the connection position, the micro switches at the corresponding positions can be triggered respectively, signals are output to the single chip microcomputer circuit 23 through the detection trigger circuit, when the detection trigger circuit at the separation position outputs signals to the single chip microcomputer circuit 23, the circuit breaker body 1 moves to the separation position, and the test position and the connection position are the same.

Referring to fig. 4, a preferred embodiment of the trigger detection circuit is shown, the trigger detection circuit of this embodiment is the same as the second monitoring circuit, that is, the separation trigger circuit, the test trigger circuit and the connection trigger circuit work according to the same principle, except that the input end of the second monitoring circuit is connected to the power input end of the circuit breaker accessory for detecting whether a voltage exists at the power input end of the circuit breaker accessory, and the anode and the cathode of the light emitting diode of the optocoupler U11 of the trigger detection circuit are respectively connected to the zero line of the microswitch, that is, the anode of the light emitting diode of the optocoupler U11 is sequentially connected to the zero line of the microswitch through a resistor R77, a zener diode DZ6, a resistor R78, a resistor R79, a resistor R80 and a diode D11, and the cathode of the light emitting diode of the optocoupler U11 is respectively connected to the zero line of the microswitch through a resistor R83. When the breaker body 1 moves to the separation position, when the test position and the connection position, trigger the corresponding micro switch, the micro switch can form current between the diode D11 and the resistor R83 of the corresponding second monitoring circuit when acting, make the light emitting diode of the optocoupler U11 emit light and switch on the output triode of the optocoupler U11, then output the signal to the singlechip circuit 23 through the output triode of the U11, if the output triode of the optocoupler U11 at the separation position outputs the signal to the singlechip circuit 23, then the breaker body 1 moves to the separation position, and the test position and the connection position are the same.

Further, the accessory protection module 2 further comprises a switch state detection circuit 27, and the switch state detection circuit 27 is connected to the single chip circuit 23 after detecting the switch state, so as to monitor the state of the switch of the circuit breaker in real time.

As shown in fig. 14, in a first operation mode of the accessory protection module 2, the bus interface circuit 21 of the accessory protection module 2 is connected to the internal bus of the intelligent controller 11, and the external bus of the intelligent controller 11 is connected to the background monitoring software. The accessory protection module 2 monitors the state of each breaker accessory in real time and transmits the state to the single chip microcomputer circuit 23 for storage, the intelligent controller 11 inquires (accesses) the state information of the breaker accessories in the single chip microcomputer circuit 23 at intervals (such as 1 second), and the intelligent controller 11 processes the inquiry result in advance and transmits the data to background monitoring software through an external bus.

As shown in fig. 15, a second working mode of the accessory protection module 2 is that the accessory protection module 2 is connected to an upper computer (client host) through a bus interface circuit 21, and background software of the upper computer monitors the state of each circuit breaker accessory in real time through the bus interface circuit 21, and can perform power-off control on each circuit breaker accessory through an accessory control circuit 26, so as to prevent individual accessories from being damaged due to long-time power-on.

The invention provides an independent circuit breaker accessory protection module which is provided with an independent protection module shell, is arranged in a circuit breaker and is connected with circuit breaker accessories in the circuit breaker through a lead. Install at universal circuit breaker usually, circuit breaker annex for current universal circuit breaker, if under-voltage release, shunt release, the closed electro-magnet, the energy storage motor provides monitoring and control function, provide the voltage detection function to power supply through annex monitoring circuit for the circuit breaker annex, provide the power detection function for the circuit breaker annex through annex monitoring circuit, can break off the power supply of circuit breaker annex through annex control module, improve the reliability of current circuit breaker annex greatly, need not to improve the control and the intelligent control that current circuit breaker annex can realize the circuit breaker. In addition, still be equipped with position detection circuit, with the corresponding switch cooperation of setting, detect whether the mechanical action of circuit breaker targets in place, can feed back the intelligent control ware or the host computer of circuit breaker through bus interface circuit, realize the intelligent control of circuit breaker. In addition, a programmable logic interface circuit is arranged, so that the user-defined control can be realized, and different requirements can be met.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. A circuit breaker accessory protection module for connection with a circuit breaker accessory of a circuit breaker, characterized in that: the circuit breaker accessory protection module is an independent module, including power supply circuit (22), singlechip circuit (23) and annex monitoring circuit (24), annex monitoring circuit (24) are connected with singlechip circuit (23), power supply circuit (22) are singlechip circuit (23) and annex monitoring circuit (24) power supply, annex monitoring circuit (24) are used for connecting the circuit breaker annex and gather the operating voltage of circuit breaker annex, whether circuit breaker annex is broken down is judged according to operating voltage in singlechip circuit (23), still include bus interface circuit (21) of being connected with singlechip circuit (23), bus interface circuit (21) are used for being connected with intelligent control ware (11) or client host computer.

2. The circuit breaker accessory protection module of claim 1, wherein: the bus interface circuit (21) is RS 485.

3. The circuit breaker accessory protection module of claim 2, wherein: the bus interface circuit (21) comprises a chip U2, wherein a TXD input end, a RXD input end and a COM direction control end of the chip U2 are respectively connected with a TXDO input end, a RXDO input end and a CODO input end of an RS485 interface, an RGND terminal, a terminal A and a terminal B of the chip U2 are respectively connected with an RGND output end, an A + output end and a B-output end of the RS485 interface, the RGND output end is connected with a TVS tube D1, and the other end of the TVS tube D1 is respectively connected with the A + output end and the B-output end.

4. The circuit breaker accessory protection module of claim 3, wherein: the model of the chip U2 is RSM 3485.

5. The circuit breaker accessory protection module of claim 1, wherein: the bus interface circuit (21) is a CAN bus or a Profibus bus.

6. The circuit breaker accessory protection module of claim 1, wherein: the single chip circuit (23) comprises a chip U5, and an oscillation circuit and a reset circuit which are respectively connected with the chip U5, wherein the oscillation circuit can form oscillation pulses to enable the chip U5 to orderly operate according to oscillation beats, the reset circuit can form an integration circuit, and reset pulses are generated at the moment of power-on to enable the chip U5 to reset; the oscillating circuit comprises a crystal oscillator X1, one end of a crystal oscillator X1 is connected with a capacitor C11 and a PFO terminal of a chip U5 respectively, the other end of the crystal oscillator X1 is connected with a capacitor C14 and a PF1 terminal of a chip U5 respectively, and the other ends of the capacitor C11 and the capacitor C14 are grounded respectively; the reset circuit comprises a resistor R29 and a capacitor C15, one end of the resistor R29 is connected with the capacitor C15 and the NRST terminal of the chip U5, and the other end of the capacitor R29 is connected with the VBAT terminal of the chip U5.

7. The circuit breaker accessory protection module of claim 1, wherein: the power supply circuit (22) comprises a filter circuit, a DC/DC conversion circuit and an LDO circuit; the filter circuit comprises a fuse F1 connected with a VIN + input end of a power circuit (22), the other end of the fuse F1 is respectively connected with an inductor L1 and a piezoresistor RV1, the other end of the piezoresistor RV1 is connected with a VIN-input end of the power circuit (22), the other end of the inductor L1 is connected with the anode of a diode D4, the cathode of the diode D4 is respectively connected with the anode of an electrolytic capacitor C5 and the anode of a ceramic capacitor C2, and the cathode of the electrolytic capacitor C5 and the cathode of the ceramic capacitor C2 are respectively connected with the VIN-input end of the power circuit (22); the DC \ DC conversion circuit comprises a chip U1, a first pin and a third pin of the chip U1 are respectively connected with a VIN + output end of a power supply circuit (22) and a VIN-output end of the power supply circuit (22) through a filter circuit, a second pin of the chip U1 is respectively connected with a fast recovery diode DZ1 and an inductor L2, the other end of the fast recovery diode DZ1 is grounded, the other end of the inductor L2, an electrolytic capacitor C7, a ceramic capacitor C6 and a transient suppression diode TVS1 are respectively connected with a fourth pin of the chip U1, and a fifth pin of the chip U1 is grounded; the LDO circuit comprises a chip U4, a first pin of a chip U4 is connected with a fourth pin of a chip U1, a fifth pin of a chip U4 is respectively connected with an output end of a capacitor C3, an output end of a capacitor C4 and an output end of a power supply circuit (22), and the other ends of a capacitor C3 and the other end of a capacitor C4 are respectively grounded.

8. The circuit breaker accessory protection module of claim 1, wherein: the universal circuit breaker detected by the accessory protection module comprises a plurality of circuit breaker accessories, the circuit breaker accessories are respectively a first accessory or a second accessory, and the accessory monitoring circuit (24) comprises a first monitoring circuit used for monitoring working voltages at two ends of the first accessory and a second monitoring circuit used for monitoring working voltages at two ends of the second accessory.

9. The circuit breaker accessory protection module of claim 8, wherein: the first monitoring circuit comprises a differential amplifying circuit, the differential amplifying circuit comprises an operational amplifier U, the output end of the operational amplifier U is connected with the input end of a single chip microcomputer circuit (23) through a resistor R6, the non-inverting input end of the operational amplifier U is respectively connected with a resistor R1 and a resistor R2, the other end of the resistor R1 is grounded, the other end of the resistor R2 is sequentially connected with the negative electrode of a diode D2 through a resistor R3, a resistor R4 and a resistor R5, the positive electrode of the diode D2 is connected with one input end of the differential amplifying circuit, the negative input end of the operational amplifier U is respectively connected with a resistor R12 and a resistor R8, the other end of the resistor R12 is connected with the output end of the operational amplifier U, the other end of the resistor R8 is sequentially connected with the positive electrode of a diode D3 through a resistor R9, a resistor R10 and a resistor R11, and the negative electrode 686 of.

10. The circuit breaker accessory protection module of claim 8, wherein: the second monitoring circuit comprises an optocoupler U11, the optocoupler U11 comprises a light emitting diode and an output triode which are matched, the anode and the cathode of the light emitting diode of the optocoupler U11 are respectively two input ends of the optocoupler U11, two ends of the output triode are respectively two output ends of the optocoupler U11, the anode of the light emitting diode of the optocoupler U11 is sequentially connected with the power input end of the second accessory through a resistor R77, a voltage stabilizing diode DZ6, a resistor R78, a resistor R79, a resistor R80 and a diode D11, the cathode of the light emitting diode of the optocoupler U11 is also connected with the power input end of the second accessory through a resistor R83, one end of the output triode of the optocoupler U11 is connected with the power circuit (22) through a resistor R81, the other end of the output triode of the optocoupler U11 is respectively connected with the input end of the singlechip circuit (23) and the resistor R84, and.

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