CN220570316U - Alarm module and residual current operated circuit breaker - Google Patents
Alarm module and residual current operated circuit breaker Download PDFInfo
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- CN220570316U CN220570316U CN202321802990.1U CN202321802990U CN220570316U CN 220570316 U CN220570316 U CN 220570316U CN 202321802990 U CN202321802990 U CN 202321802990U CN 220570316 U CN220570316 U CN 220570316U
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 68
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 68
- 239000010703 silicon Substances 0.000 claims abstract description 68
- 239000003990 capacitor Substances 0.000 claims description 44
- 239000004065 semiconductor Substances 0.000 claims description 20
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims description 9
- 230000005611 electricity Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The alarm module and the residual current operated circuit breaker, the alarm includes step-down power supply loop and alarm output loop, the power end and the residual current operated circuit breaker of step-down power supply loop are connected, the power supply of step-down power supply loop for the alarm output loop is connected with the residual current operated circuit breaker and is used for receiving first control signal and second control signal, the alarm output loop includes locking unit and the alarm unit of being controlled by locking unit, locking unit includes the coil and the silicon controlled rectifier of relay, the alarm output loop receives first control signal, the silicon controlled rectifier switches on and makes the coil in order to trigger alarm unit and send the alarm, the alarm output loop receives the second control signal, the silicon controlled rectifier turns off and makes the coil lose electricity, the alarm unit does not have the action. In the utility model, the locking unit is formed by matching the silicon controlled rectifier with the coil of the relay, and the coil of the relay is controlled by the silicon controlled rectifier, thereby reducing the requirement on the relay and being beneficial to reducing the volume and the cost.
Description
Technical Field
The utility model relates to the field of piezoelectric devices, in particular to an alarm module and a residual current operated circuit breaker.
Background
The residual current operated circuit breaker is one of the circuit breakers, is widely applied to a circuit network for direct contact electric shock protection and indirect contact electric shock protection, and can automatically break a circuit when a human body touches a charged body or equipment insulation damage to form a ground fault.
In the existing products, the alarm modules of the residual current operated circuit breaker are divided into two types, one type of the alarm modules needs to be independently connected with a working power supply when a user is in use, and when the user leaks the power supply of the alarm module, the alarm module cannot work normally, so that the product is invalid; the other type obtains working power from the circuit breaker, a double-group relay is usually configured in the alarm module, a group of switches in the relay form a locking unit, when residual current exists in the circuit breaker, the coil of the relay drives the two groups of switches to switch states, and the alarm unit gives out an alarm through unlocking the locking unit, but due to the high cost and large size of the double-group relay, the occupied space is large in practical application, and the miniaturization design of the circuit breaker is not facilitated.
Disclosure of Invention
The utility model aims to overcome at least one defect of the prior art and provide an alarm module and a residual current operated circuit breaker which are high in reliability, low in cost and small in occupied space.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an alarm module, which comprises a step-down power supply loop and an alarm output loop, wherein the power end of the step-down power supply loop is connected with a residual current action breaker, the step-down power supply loop supplies power to the alarm output loop, the signal control end of the alarm output loop is connected with the residual current action breaker and is used for receiving a first control signal and a second control signal, the alarm output loop comprises a locking unit and an alarm unit controlled by the locking unit,
the locking unit comprises a coil of a relay and a silicon controlled rectifier connected with the coil,
the alarm output loop receives the first control signal, the controllable silicon is conducted to enable the coil to be electrified so as to trigger the alarm unit to send out an alarm,
and the alarm output loop receives the second control signal, the controllable silicon is turned off to power off the coil, and the alarm unit does not act.
Preferably, the gate electrode of the silicon controlled rectifier is used for receiving the first control signal or the second control signal, the anode of the silicon controlled rectifier is connected with the positive power output end of the step-down power supply loop, and the cathode of the silicon controlled rectifier is connected with the negative power output end of the step-down power supply loop through a coil.
Preferably, the signal control end of the alarm output loop is also connected with a signal processing unit, the signal processing unit is powered by the step-down power supply loop, the signal processing unit comprises a triode, the base electrode of the triode is used for receiving the first control signal and the second control signal, the collector electrode of the triode is connected with the positive power output end of the step-down power supply loop, and the emitter electrode of the triode is connected with the anode electrode of the controllable silicon.
Preferably, the alarm output loop further comprises a reset unit, one end of the reset unit is connected with the anode of the silicon controlled rectifier, the other end of the reset unit is connected with the negative power supply output end of the step-down power supply loop, the reset unit comprises a normally-open reset switch, and the reset switch of the silicon controlled rectifier can be turned off by turning on the reset switch.
Preferably, the step-down power supply loop is a DCDC step-down module.
Preferably, the step-down power supply loop comprises a primary step-down circuit and a switching power supply step-down circuit, the primary step-down circuit is connected with the residual current operated circuit breaker and used for providing a first voltage for the switching power supply step-down circuit, the switching power supply step-down circuit is connected with the alarm output loop and used for providing a second voltage for the alarm output loop, and the first voltage is larger than the second voltage.
Preferably, the first voltage ranges from 85 to 320V, and the second voltage ranges from 5 to 24V.
Preferably, the primary voltage reduction circuit comprises a first semiconductor switching element for voltage reduction, a first current limiting resistor is connected in series between a drain electrode of the first semiconductor switching element and one power supply end of the residual current operated circuit breaker, one end of the first current limiting resistor is used as a positive power supply end J1, at least one diode is connected in series between a grid electrode of the first semiconductor switching element and the other power supply end of the residual current operated circuit breaker, a source electrode of the first semiconductor switching element is connected with the switching power supply voltage reduction circuit, a first bias resistor is connected between the grid electrode and the drain electrode of the first semiconductor switching element, and at least one diode is connected between the grid electrode and the source electrode of the first semiconductor switching element;
the switching power supply voltage reducing circuit comprises a pi-type filter circuit and an electronic switch chip, wherein the electronic switch chip is connected with the primary voltage reducing circuit through the pi-type filter circuit, the electronic switch chip is also connected with a feedback reference input circuit and a rectifying filter circuit, and the rectifying filter circuit is connected with an alarm output loop.
Preferably, the alarm unit comprises at least one alarm element, a resistor and a capacitor, wherein two ends of the alarm element connected in series with the resistor are connected with two ends of the capacitor, and two ends of the capacitor are respectively connected with two ends of the coil.
The utility model also provides a residual current operated circuit breaker, which comprises a residual current protection module and the alarm module, wherein the step-down power supply loop is connected with the residual current protection module to obtain electricity, and the signal control end of the alarm output loop is connected with the residual current protection module to obtain a first control signal and a second control signal.
The alarm module and the residual current operated circuit breaker form the locking unit by matching the controllable silicon with the coil of the relay, and the controllable silicon controls the coil of the relay, so that the alarm unit is driven when the coil is electrified.
In addition, the step-down power supply loop performs step-down twice through a primary step-down circuit and a switching power supply step-down circuit, or the step-down power supply loop is a DCDC step-down module, and is less influenced by a current-limiting resistor life reduction or a capacitor in resistance-capacitance step-down.
In addition, the reset unit is connected with the locking unit in parallel, and a reset switch for operating the reset unit can be used for turning off the silicon controlled rectifier to release the alarm, so that the device has the advantages of convenience in operation, safety and reliability.
Drawings
FIG. 1 is a schematic diagram of the connection of a residual current operated circuit breaker with an alarm module according to the present utility model;
FIG. 2 is a circuit diagram (first embodiment) of an alarm module of the present utility model;
fig. 3 is a circuit diagram (second embodiment) of the alarm module of the present utility model.
Detailed Description
Specific embodiments of the alarm module and the residual current operated circuit breaker according to the present utility model are further described below with reference to the examples shown in the drawings. The alarm module and the residual current operated circuit breaker of the present utility model are not limited to the description of the following embodiments.
The alarm module is used for a residual current operated circuit breaker and comprises a step-down power supply loop and an alarm output loop, wherein a power end of the step-down power supply loop is connected with the residual current operated circuit breaker to obtain electricity, the step-down power supply loop supplies power for the alarm output loop, a signal control end of the alarm output loop is connected with the residual current operated circuit breaker to receive a control signal, the control signal generally comprises a first control signal and a second control signal, the alarm output loop comprises a locking unit and an alarm unit, and the locking unit controls the alarm unit to act according to the received first control signal or second control signal.
The improvement point of the application lies in that the locking unit of the alarm output loop comprises a coil of the relay and a silicon controlled rectifier connected with the coil, the alarm output loop receives a first control signal, the silicon controlled rectifier is conducted to enable the coil to be electrified so as to trigger the alarm unit to send out an alarm, the alarm output loop receives a second control signal, the silicon controlled rectifier is turned off to enable the coil to lose electricity, and the alarm unit does not act.
Therefore, the locking unit is formed by matching the controllable silicon with the coil of the relay, and the controllable silicon controls the coil of the relay, so that the alarm unit is driven when the coil is electrified.
Further, the alarm output loop further comprises a reset unit, the reset unit comprises a reset switch, the reset switch is connected with the silicon controlled rectifier and used for turning off the silicon controlled rectifier, namely, after the alarm unit gives an alarm, the silicon controlled rectifier can be turned off to release the alarm by operating the reset switch, but when the residual current acts on the circuit breaker, the residual current still exists, the silicon controlled rectifier can be turned on again to trigger the alarm unit.
Preferably, the step-down power supply loop takes power from the residual current operated circuit breaker, and the step-down power supply loop supplies power to the alarm output loop after carrying out step-down twice through the primary step-down circuit and the switching power supply step-down circuit, or the step-down power supply loop is a DCDC step-down module, and the influence of a capacitor in the current-limiting resistor life reduction or the resistance-capacitance step-down is smaller. Of course, the alarm output loop can also be powered by a separately arranged power supply module, but the wiring is inconvenient.
An embodiment of a first alarm module is provided in connection with fig. 1 and 2.
As shown in fig. 2, the alarm module includes a step-down power supply loop and an alarm output loop, the step-down power supply loop is connected with a power end of the residual current operated circuit breaker to take power, that is, two power ends (a positive power end J1, a negative power end J3, and a negative power end J3 are connected with GND) of the step-down power supply loop are respectively connected with two power ends of the residual current operated circuit breaker to take power, the step-down power supply loop supplies power to the alarm output loop, and a signal control end J2 of the alarm output loop receives control signals (a first control signal and a second control signal) output by the residual current operated circuit breaker.
The alarm output loop comprises a locking unit, an alarm unit and a reset unit, wherein two ends of the locking unit are respectively connected with two power output ends of the step-down power supply loop, one power output end is a positive power output end, the other power output end is a negative power output end, the locking unit comprises a coil of a relay and a silicon controlled rectifier, an anode of the silicon controlled rectifier is connected with one power output end of the step-down power supply loop, in the embodiment, the anode of the silicon controlled rectifier is connected with the positive power output end, a cathode of the silicon controlled rectifier is connected with the negative power output end through the coil, and a gate electrode of the silicon controlled rectifier is used for receiving a control signal and is turned on or off according to the control signal.
The two ends of the alarm unit are respectively connected with the two ends of the coil of the relay, and the alarm unit can be driven to act after the coil is electrified; one end of the reset unit is connected with the anode of the silicon controlled rectifier, the other end of the reset unit is connected with the negative power supply output end of the step-down power supply loop, no current passes through the reset unit when the reset unit is not operated, and the reset unit is operated to turn off the silicon controlled rectifier after the alarm unit gives an alarm, so that the alarm is relieved, and the device has the advantages of convenience in operation and safety and controllability.
In this embodiment, the step-down power supply loop is used for supplying power to the alarm output loop through twice step-down, in fig. 2, the step-down power supply loop includes a step-down circuit and a switching power supply step-down circuit connected with the step-down circuit, the step-down circuit and the residual current protection module are used for providing a first voltage for the switching power supply step-down circuit, the switching power supply step-down circuit is connected with the alarm output loop and is used for providing a second voltage for the alarm output loop, the first voltage is greater than the second voltage, wherein the range of the first voltage is 85-320V, the range of the second voltage is 5-25V, in this embodiment, the second voltage is 16V, and the first voltage and the second voltage are direct currents. In addition, in this embodiment, the step-down power supply loop provides dc power for the alarm output loop, and the negative power supply output end of the step-down power supply loop is connected to the negative power supply end J3 and to GND.
As shown in fig. 2, the primary step-down circuit includes a first semiconductor switching element for step-down, a first current limiting resistor is connected in series between a drain electrode of the first semiconductor switching element and a positive power supply of the residual current operated circuit breaker, that is, one end of the first current limiting resistor is used as a positive power supply end J1 of the step-down power supply loop, the other end of the first current limiting resistor is connected with the drain electrode of the first semiconductor switching element, at least one diode is connected in series between a gate electrode of the first semiconductor switching element and another negative power supply of the residual current operated circuit breaker, that is, an anode electrode of the diode after being connected in series is used as a negative power supply end J3 of the step-down power supply loop, a cathode electrode of the diode after being connected in series is connected with a gate electrode of the first semiconductor switching element, a source electrode of the first semiconductor switching element is connected with the step-down circuit of the switching power supply, and at least one diode is connected between the gate electrode and the source electrode of the first semiconductor switching element.
Specifically, the first semiconductor switching element is a MOS transistor Q1, the drain electrode of the MOS transistor Q1 is connected in series with two first current limiting resistors, in fig. 1, the first current limiting resistors are a resistor R1 and a resistor R2, in this embodiment, one end of the resistor R1 is used as a positive power supply terminal J1 and is connected with one power supply terminal (positive power supply) of the residual current operation circuit breaker, the gate electrode of the MOS transistor Q1 is connected with the cathode of a diode D3, the anode of the diode D3 is connected with the cathode of a diode D4, the anode of the diode D4 is used as a negative power supply terminal J3 and is connected with the other power supply terminal (negative power supply) of the residual current operation circuit breaker, the diode D3 and the diode D4 are used as reference voltage stabilizing circuits to ensure that the output voltage is not greater than 320v, the two ends of the first bias resistor R3 and the first bias resistor R4 are respectively connected with the drain electrode and the gate electrode of the MOS transistor Q1, the anode of the MOS transistor Q1 is connected with the cathode of the diode D3, the anode of the diode D5 is connected with the cathode of the diode D4, and the voltage stabilizing circuit Q5 is reduced when the voltage is very high, and the voltage is very low, the voltage is output between the drain and the drain electrode and the diode Q1 is very low, and the voltage is very high, and the voltage is very low.
The switching power supply voltage reducing circuit comprises an electronic switch chip, a feedback reference input circuit and a rectifying and filtering circuit which are connected to the electronic switch chip, wherein the feedback reference input circuit and the rectifying and filtering circuit are respectively connected with an alarm output loop, the switching power supply voltage reducing circuit is used for realizing secondary voltage reduction, the input 85-320V direct current voltage is reduced to 16V and then is output, and preferably, a pi-type filtering circuit is connected between the electronic switch chip and the primary voltage reducing circuit.
Specifically, as shown in fig. 2, the switching power supply voltage reducing circuit includes an electronic switch chip U1 x, the pi-type filter circuit includes a capacitor C1, an inductor L1, and a capacitor C2, wherein the inductor L1 is connected in series between a SW pin of the electronic switch chip U1 x and the primary voltage reducing circuit, that is, the inductor L1 is connected in series between a source electrode of the MOS transistor Q1 and the SW pin of the electronic switch chip U1, an anode of the capacitor C1 and an anode of the capacitor C2 are respectively connected with two ends of the inductor L1, and a cathode of the capacitor C1 and a cathode of the capacitor C2 are respectively connected with a negative power supply terminal J3; the feedback reference input circuit comprises a diode D8, a resistor R5, a resistor R6, a capacitor C4 and a capacitor C5, wherein one end of the resistor R5, one end of the resistor R6 and one end of the capacitor C4 are connected with the FB pin of the electronic switch chip U1, one end of a cathode of the diode D8 and one end of the capacitor C5 are connected with the other end of the resistor R5, and the other ends of the capacitor C4, the capacitor C5 and the resistor R6 are connected with the GND pin of the electronic switch chip U1 x; the feedback reference input circuit is also connected with a rectification filter circuit, the rectification filter circuit comprises an inductor L2, a diode D6 and a capacitor C6, one end of the inductor L2 is connected with a GND pin of the electronic switch chip U1 x, the other end of the inductor L2 and the anode of the capacitor C6 are connected with an anode of the diode D8, a cathode of the capacitor C6 and the anode of the diode D6 are connected with a negative power supply end J3, the capacitor C3 is used for realizing the anti-interference filter function of the electronic switch chip U1 x, one end of the capacitor C3 is connected with a VDD pin of the electronic switch chip U1 x, and the other end of the capacitor C3 is connected with the GND pin of the electronic switch chip U1 x. In addition, a resistor R7 is also connected to the switching power supply voltage reducing circuit, the resistor R7 is used as a starting dummy load, one end of the resistor R7 is connected with the anode of the diode D8, the other end of the resistor R7 is connected with the negative power supply end J3, and the resistor R7 is used as a starting dummy load for reducing the voltage of the switching power supply.
The alarm output loop comprises a locking unit, an alarm unit and a reset unit, wherein the locking unit is connected with the reset unit in parallel, the locking unit controls the alarm unit according to a received first control signal or a received second control signal, preferably, a signal control end J2 of the alarm output loop is connected with a signal processing unit, the signal processing unit outputs a processed control signal to the locking unit, namely the first control signal and the second control signal, in the embodiment, the signal processing unit comprises a triode, a collector electrode of the triode is connected with a positive power output end of the step-down power supply loop, an emitter electrode of the triode is connected with an anode of the controllable silicon, and the first control signal or the second control signal is input into a gate electrode of the controllable silicon D7 after being amplified by the triode.
Specifically, as shown in fig. 2, the signal processing unit includes a triode Q2, a resistor R10, a resistor R11, a resistor R12, a capacitor C7 and a capacitor C8, where a base electrode of the triode Q2 is connected with the signal control end J2 through the resistor R10, a collector electrode of the triode Q2 is connected with a positive power supply output end of the step-down power supply loop through the resistor R9, that is, a collector electrode of the triode Q2 is connected with an anode of a diode D8 in the step-down circuit of the switching power supply, a base electrode and an emitter electrode of the triode Q2 are connected with a negative power supply output end (negative power supply end J3) of the step-down circuit of the switching power supply through the resistor R11 and the resistor R12, and one end of the capacitor C7 and one end of the capacitor C8 after being connected in parallel are connected with the negative power supply output end (negative power supply end J3) of the step-down circuit of the switching power supply, and the other end is connected with the signal control end J2.
The locking unit comprises a resistor R8, a silicon controlled rectifier D7 and a coil of a relay K1, wherein the anode of the silicon controlled rectifier D7 is connected with the positive power output end of a switch power supply voltage reducing circuit through the resistor R8, namely is connected with the anode of a diode D8, the gate of the silicon controlled rectifier D7 is connected with the emitter of a triode Q2, the gate of the silicon controlled rectifier D7 is used for receiving a first control signal and a second control signal output by a residual current operated circuit breaker, the cathode of the silicon controlled rectifier D7 is connected with the negative power output end of a voltage reducing power supply loop through the coil of the relay K1, namely is connected with GND, the gate of the silicon controlled rectifier D7 is controlled to be turned on or off according to the received first control signal or the second control signal, the contact of the relay K1 controlled by the coil is used for controlling a client to be connected with an alarm loop with alarm equipment, wherein the alarm equipment can be an alarm lamp and/or a loudspeaker, that is, the contacts of the relay K1 include a common point, a first node and a second node, the common point and the first node form a normally closed contact, the common point and the second node form a normally open contact, the state switching of the normally open contact and the normally closed contact is controlled by a coil, in this embodiment, the relay K1 corresponds to a dry contact switch, taking fig. 2 as an example, a power supply loop accessed by a customer includes a first alarm loop and a second alarm loop, the normally closed contact and the normally closed contact of the relay K1 are respectively used for controlling the first alarm loop and the second alarm loop, the alarm device B11, the alarm device B12 and the alarm device B14 are respectively connected with the common point, the first node and the second node, when the coil does not act, the alarm device B11 and the alarm device B12 are accessed into the first alarm loop, the first alarm loop is kept in an on state, and the second alarm loop is disconnected, the alarm device B11, the alarm device B12 is in an operating state; when the coil acts to drive the normally open contact and the normally closed contact to switch over, the alarm device B11 and the alarm device B14 are connected into a second alarm loop, the second alarm loop is in a connection state, the alarm device B11 and the alarm device B14 are in a working state, and the first alarm loop is disconnected.
As shown in fig. 2, two ends of the alarm unit are respectively connected with two ends of a coil of the relay K1, the alarm unit comprises at least one alarm element, a resistor and a capacitor, the two ends of the alarm element after being connected with the resistor in series are connected with two ends of the capacitor, the two ends of the capacitor are respectively connected with two ends of the coil, when the coil is powered on, the alarm element obtains voltage to give an alarm, and when the coil is powered off, the alarm element does not act, specifically in the embodiment, the alarm element is a light emitting diode LED1, the resistor and the capacitor in the alarm unit are respectively a resistor R13 and a capacitor C9, the positive electrode of the light emitting diode LED1 is connected with one end of the resistor R13, the other end of the resistor R13 is connected with one end of the coil, the negative electrode of the light emitting diode LED1 is connected with the other end of the coil, the anode of the capacitor C9 is connected with the cathode of the silicon controlled rectifier D7 (one end of the coil), and the cathode of the capacitor C9 is connected with the other end of the coil. In addition, the alarm element is not limited to the light emitting diode, but may be other elements such as an alarm bell.
As shown in fig. 2, one end of the reset unit is connected with the anode of the silicon controlled rectifier D7, the other end of the reset unit is connected with the negative power supply output end of the switching power supply voltage reducing circuit, the reset unit comprises a reset switch S1 and a resistor R14, one end of the reset switch S1 is connected with the anode of the silicon controlled rectifier D7, the other end of the reset switch S1 is connected with the negative power supply output end of the switching power supply voltage reducing circuit through the resistor R14, and when the reset switch S1 is not operated, the reset switch S1 is kept in an off state.
In this embodiment, the alarm module is connected to the residual current protection module of the residual current operated circuit breaker, that is, the residual current protection module inputs a control signal to the signal control terminal J2, when there is residual current, inputs a first control signal to the signal control terminal J2, and when there is no residual current, inputs a second control signal to the signal control terminal J2.
When the residual current does not exist in the residual current operated circuit breaker, the signal control end J2 inputs a second control signal, namely the signal control end J2 has no voltage input, the triode Q2 is cut off, the silicon controlled rectifier D7 is cut off, and the coil of the relay K1 has no voltage, so that the alarm unit does not operate; when residual current exists in the residual current operated circuit breaker, the signal control end J2 inputs a first control signal, namely, the residual current protection module outputs 12V voltage to the triode Q2, so that the triode Q2 is conducted, the controllable silicon D7 is further conducted, the coil of the relay K1 is electrified, namely, the voltage at two ends of the coil is more than 9V, and at the moment, the alarm unit obtains the voltage to give out an alarm, namely, the light-emitting diode LED1 emits light.
After the alarm unit acts, the reset switch is turned on, and the voltage of the anode of the silicon controlled rectifier D7 is pulled down, so that the silicon controlled rectifier D7 is turned off, and the coil of the relay K1 is powered off to turn off the alarm unit, if the residual current still exists at the moment, and when the reset switch S1 is not operated any more, the silicon controlled rectifier D7 is turned on again to trigger the alarm unit.
A second embodiment of an alarm module for a residual current operated circuit breaker is provided in connection with figures 1, 3.
The alarm module of the residual current operated circuit breaker comprises a step-down power supply loop and an alarm output loop, wherein the step-down power supply module is a DCDC step-down module, the DCDC step-down module outputs direct-current voltage of 5-24V outwards, a I N pin and a GND pin of the DCDC step-down module are respectively used as a positive power end J1 and a negative power end J3 of the step-down power supply loop, an OUT pin and a GND pin of the DCDC step-down module are respectively used as two power output ends of the step-down power supply loop, and the negative power end J3 and the GND pin are respectively connected with GND.
The alarm output loop comprises a locking unit, an alarm unit and a reset unit, wherein the locking circuit comprises a silicon controlled rectifier D1 and a relay K1, the gate electrode of the silicon controlled rectifier D1 is used as a signal control end J2 of the alarm module, a capacitor C1 and a capacitor C2 are connected in parallel between the signal control end J2 and GND, the anode of the silicon controlled rectifier D1 is connected with an OUT pin of the DCDC voltage reduction module, the cathode of the silicon controlled rectifier D1 is connected with the negative power supply output end through a coil of the relay K1, and a contact controlled by the coil in the relay K1 is used for being connected with an alarm loop with alarm equipment identical to that of the first embodiment, namely the alarm equipment used for controlling client access.
The alarm unit comprises a capacitor C3, a resistor R1 and a light-emitting diode LED1, wherein the capacitor C3 is connected in parallel with two ends of a coil of the relay K1, the anode of the capacitor C3 is connected with the cathode of the silicon controlled rectifier D1, the anode of the light-emitting diode LED1 is connected with the anode of the capacitor C3 through the resistor R1, the cathode of the light-emitting diode LED1 is connected with the cathode of the capacitor C3, the reset unit comprises a normally-open reset switch S1, one end of the reset switch S1 is connected with the anode of the silicon controlled rectifier D1, and the other end of the reset switch S1 is connected with the cathode of the light-emitting diode LED 1.
As in the first embodiment, the alarm module is connected with the residual current protection module of the residual current operated circuit breaker, when no residual current exists in the residual current operated circuit breaker, the signal control terminal J2 inputs a second control signal, the thyristor D7 is turned off, and the coil of the relay K1 has no voltage, so that the alarm unit does not act; when residual current exists in the residual current operated circuit breaker, J2 inputs a first control signal, the silicon controlled rectifier D7 is conducted, the coil of the relay K1 is electrified, and the alarm unit obtains voltage to give out an alarm, namely the light emitting diode LED1 emits light.
After the alarm unit acts, the reset switch is turned on, and the voltage of the anode of the silicon controlled rectifier D7 is pulled down, so that the silicon controlled rectifier D7 is turned off, and the coil of the relay K1 is powered off to turn off the alarm unit, if the residual current still exists at the moment, and when the reset switch S1 is not operated any more, the silicon controlled rectifier D7 is turned on again to trigger the alarm unit.
It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (10)
1. The alarm module comprises a step-down power supply loop and an alarm output loop, wherein a power end of the step-down power supply loop is connected with a residual current operated circuit breaker, the step-down power supply loop supplies power for the alarm output loop, a signal control end of the alarm output loop is connected with the residual current operated circuit breaker and is used for receiving a first control signal and a second control signal, and the alarm output loop comprises a locking unit and an alarm unit controlled by the locking unit, and is characterized in that:
the locking unit comprises a coil of a relay and a silicon controlled rectifier connected with the coil,
the alarm output loop receives the first control signal, the controllable silicon is conducted to enable the coil to be electrified so as to trigger the alarm unit to send out an alarm,
and the alarm output loop receives the second control signal, the controllable silicon is turned off to power off the coil, and the alarm unit does not act.
2. The alarm module of claim 1, wherein: the gate electrode of the controllable silicon is used for receiving the first control signal or the second control signal, the anode of the controllable silicon is connected with the positive power output end of the voltage-reducing power supply loop, and the cathode of the controllable silicon is connected with the negative power output end of the voltage-reducing power supply loop through a coil.
3. The alarm module of claim 2, wherein: the signal control end of the alarm output loop is also connected with a signal processing unit, the signal processing unit is powered by the step-down power supply loop, the signal processing unit comprises a triode, the base electrode of the triode is used for receiving the first control signal and the second control signal, the collector electrode of the triode is connected with the positive power supply output end of the step-down power supply loop, and the emitter electrode of the triode is connected with the anode of the controllable silicon.
4. An alarm module according to claim 1, 2 or 3, wherein: the alarm output loop also comprises a reset unit, one end of the reset unit is connected with the anode of the silicon controlled rectifier, the other end of the reset unit is connected with the negative power supply output end of the step-down power supply loop, the reset unit comprises a normally-open reset switch, and the reset switch of the silicon controlled rectifier can be turned off when the reset switch is turned on.
5. The alarm module of claim 4, wherein: the step-down power supply loop is a DCDC step-down module.
6. The alarm module of claim 4, wherein: the step-down power supply loop comprises a primary step-down circuit and a switching power supply step-down circuit, the primary step-down circuit is connected with the residual current operated circuit breaker and used for providing a first voltage for the switching power supply step-down circuit, the switching power supply step-down circuit is connected with the alarm output loop and used for providing a second voltage for the alarm output loop, and the first voltage is larger than the second voltage.
7. The alarm module of claim 6, wherein: the range of the first voltage is 85-320V, and the range of the second voltage is 5-24V.
8. The alarm module of claim 6, wherein: the primary voltage reduction circuit comprises a first semiconductor switching element for voltage reduction, a first current limiting resistor is connected in series between the drain electrode of the first semiconductor switching element and one power supply end of the residual current operated circuit breaker, one end of the first current limiting resistor is used as a positive power supply end J1, at least one diode is connected in series between the grid electrode of the first semiconductor switching element and the other power supply end of the residual current operated circuit breaker, the source electrode of the first semiconductor switching element is connected with a switching power supply voltage reduction circuit, a first bias resistor is connected between the grid electrode and the drain electrode of the first semiconductor switching element, and at least one diode is connected between the grid electrode and the source electrode of the first semiconductor switching element;
the switching power supply voltage reducing circuit comprises a pi-type filter circuit and an electronic switch chip, wherein the electronic switch chip is connected with the primary voltage reducing circuit through the pi-type filter circuit, the electronic switch chip is also connected with a feedback reference input circuit and a rectifying filter circuit, and the rectifying filter circuit is connected with an alarm output loop.
9. The alarm module of claim 4, wherein: the alarm unit comprises at least one alarm element, a resistor and a capacitor, wherein two ends of the alarm element connected with the resistor in series are connected with two ends of the capacitor, and two ends of the capacitor are respectively connected with two ends of the coil.
10. Residual current operated circuit breaker, including residual current protection module, its characterized in that: the alarm module according to any one of claims 1-9, wherein the step-down power supply loop is connected with the residual current protection module to obtain power, and the signal control end of the alarm output loop is connected with the residual current protection module to obtain a first control signal and a second control signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321802990.1U CN220570316U (en) | 2023-07-10 | 2023-07-10 | Alarm module and residual current operated circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321802990.1U CN220570316U (en) | 2023-07-10 | 2023-07-10 | Alarm module and residual current operated circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN220570316U true CN220570316U (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321802990.1U Active CN220570316U (en) | 2023-07-10 | 2023-07-10 | Alarm module and residual current operated circuit breaker |
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| Country | Link |
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| CN (1) | CN220570316U (en) |
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2023
- 2023-07-10 CN CN202321802990.1U patent/CN220570316U/en active Active
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