CN218513406U

CN218513406U - Under-voltage release with mode switching function

Info

Publication number: CN218513406U
Application number: CN202222598752.5U
Authority: CN
Inventors: 周超; 葛纹懿; 徐军; 杜根; 张俊彪
Original assignee: Jiangyin Yihong Electric Co ltd
Current assignee: Jiangyin Yihong Electric Co ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2023-02-21
Anticipated expiration: 2032-09-30

Abstract

The utility model discloses an under-voltage release with mode switching function, including rectifier circuit, power supply circuit, MCU circuit, drive circuit, electro-magnet and dial switch, rectifier circuit output DC power supply magnet and power supply circuit, power supply circuit respectively to MCU with drive circuit provide the power, MCU sample to rectifier circuit, operate and judge after drive circuit provide control signal, drive circuit control electro-magnet electric current break-make, dial switch set up MCU circuit mode and time delay time value length. The utility model discloses a dial switch can make under-voltage release switch wantonly between ordinary operating mode and zero voltage operating mode.

Description

Under-voltage release with mode switching function

Technical Field

The utility model relates to a low-voltage apparatus field, especially an under-voltage release with mode switching function.

Background

The under-voltage release is a circuit breaker, which is one of the important elements of a frame-type circuit breaker, when the input power voltage is equal to or greater than 85% of the rated working voltage of the under-voltage release, under the thermal condition, the reliable closing of the circuit breaker can be ensured, the coil of the release is electrified, and the movable armature in the coil overcomes the spring force and sucks in the coil electromagnetic force and keeps a certain torque (suction) so as to provide the closing condition for the circuit breaker. When the input voltage of the tripping device is reduced to a certain specified range, the tripping device causes the circuit breaker to be switched off in a delayed or non-delayed way, when the power supply voltage is reduced, even slowly reduced to 70-35% of the rated working voltage, the undervoltage tripping device acts, the electromagnet coil loses power, the movable armature is popped up under the action of the reset spring force, and the circuit breaker locking mechanism is jacked open to realize undervoltage tripping; the essence of undervoltage tripping is an effective measure for preventing the self heating aggravation and even burning of the circuit breaker subordinate electric equipment when the current is too large when the equipment works in an undervoltage state.

The under-voltage release is divided into two types of common (conventional) type and zero-voltage type according to the application, wherein the instantaneous (non-delay value) under-voltage release in the common type is a release which is released immediately once the power grid input voltage is lower than a certain value (under-voltage value, built in manufacturers) of 70 percent Ue, and the delay type under-voltage release in the common type is characterized in that when the power grid input voltage is lower than the under-voltage value (but not lower than 35 percent Ue) to start internal delay, if the power grid input voltage is recovered to 85 percent Ue and above in a delay stage, no action is carried out, otherwise, after the delay time value is reached, the under-voltage release acts to realize switching-off, and if the power grid input voltage is lower than 35 percent Ue in the delay stage, the under-voltage release acts to realize switching-off immediately; an instantaneous undervoltage release in a zero-voltage undervoltage release is a release which releases immediately when the input voltage of a power grid is once lower than 35% Ue, a delay type undervoltage release in the zero-voltage undervoltage release starts internal delay when the input voltage of the power grid is once lower than 35% Ue, if the input voltage of the power grid is restored to 85% Ue or above in a delay stage, no action is made, otherwise, after the delay time value is reached, the undervoltage release acts to realize switching-off.

In addition, in the process from a release manufacturer, a breaker manufacturer, an electric cabinet manufacturer to a terminal customer, when any link needs to be changed, a supply chain is required to be replaced again, and the operation is very troublesome.

In addition, the existing undervoltage release has no working state indication, thus being not convenient for debugging in the production process and being not convenient for on-site checking.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides a device which combines four basic types of under-voltage release devices into one, and simplifies the production and logistics processes; an indicator lamp is arranged to indicate the working state of the undervoltage release at any time, and the undervoltage release with the mode switching function is convenient for production debugging and field use.

The purpose of the utility model is realized through the following technical scheme.

The utility model provides an under-voltage release with mode switching function, includes rectifier circuit, power supply circuit, MCU circuit, drive circuit, electro-magnet and dial switch, rectifier circuit output direct current power supply magnet and power supply circuit, power supply circuit respectively to MCU circuit with drive circuit provide the power, MCU circuit samples to rectifier circuit, operation judgement back to drive circuit provide control signal, drive circuit control electro-magnet current break-make, MCU circuit contains its scintillation form of pilot lamp and characterizes the present operating condition of release, dial switch set up MCU circuit operating mode and time delay value size.

The dial switch comprises an independent or combined dial switch, the dial state is read by a CPU circuit, wherein 1 bit or 2 bits are used for switching/setting the working mode of the undervoltage release, and the rest bits are used for setting a delay value required to be set by the undervoltage release in the delay stage.

The indicating lamp comprises an LED or other small-sized filament indicating lamps and is used for indicating the working state of the undervoltage release, indicating no electricity when the indicator is not on, indicating the normal working state that the input voltage of the power grid is not undervoltage when the indicator is on for a long time, indicating the undervoltage delay state when the indicator flickers according to a certain lower frequency, indicating that the input voltage exceeds the upper limit value of the national standard specified voltage grade when the indicator flickers according to a certain higher frequency, indicating that the undervoltage release is in the standby state when the indicator flickers very slowly, namely, the input voltage of the power grid does not reach the attraction voltage value of 85 Ue yet.

The rectification circuit is a full-bridge circuit formed by combining discrete components or a full-bridge module.

The MCU circuit performs sampling calculation judgment on the power grid voltage through an internal program and outputs a control signal; and the microprocessor in the MCU circuit is SOC, FPGA or DSP.

The driving circuit is a circuit consisting of power MOS tubes, an SCR (silicon controlled rectifier), a triode circuit or an integrated power module.

The power supply circuit is a switch type power supply circuit or a series voltage reduction type analog power supply circuit.

Compared with the prior art, the utility model has the advantages of: the utility model is provided with a group of dial switches, especially with a dial for switching the working modes of the undervoltage release, which combines the four basic types of undervoltage releases into one, and simplifies the production and logistics processes; an indicator light is arranged to indicate the working state of the undervoltage release at any time, so that convenience is brought to production debugging and field use. Under the prerequisite that does not increase product cost hardly, through setting up a set of dial switch and an pilot lamp, can close four kinds of undervoltage release commonly used as an organic whole, fully simplify production management and control, storage procedure, show and reduce the commodity circulation cost of turning back, improve product competitiveness.

Drawings

Fig. 1 is a schematic diagram of the circuit module of the present invention.

Fig. 2 is a schematic diagram of an embodiment of the dial-up and CPU connection of the present invention.

Fig. 3 shows an embodiment of the panel arrangement of the present invention.

Detailed Description

The invention is described in detail below with reference to the drawings and specific embodiments.

As shown in FIG. 1, the technical specification of an under-voltage release with a mode switching function conforms to GB14048.1-2012 and GB14048.2-2012. The intelligent control circuit comprises a rectifying circuit, a power circuit, an MCU circuit, a driving circuit, an electromagnet and a dial switch, wherein the rectifying circuit outputs a high-voltage direct-current power supply magnet and the power circuit, the power circuit respectively supplies power to the MCU circuit and the driving circuit, the MCU circuit samples the rectifying circuit, provides a control signal to the driving circuit after operation judgment, controls the current on-off of the electromagnet, and comprises an indicator light and a flicker form of the indicator light to represent the current working state of a release, and the dial switch sets the working mode and the time value of the MCU circuit.

The MCU circuit samples, calculates and judges the voltage of the power grid through an internal program and outputs a control signal; the microprocessor in the MCU circuit is an SOC, an FPGA or a DSP, the MCU circuit samples a voltage value output by the rectifying circuit through the microprocessor, and sends a control (such as high level or starting PWM) signal to the drive circuit if the pull-in condition is met, and sends a control (such as low level or stopping PWM) signal to the drive circuit if the pull-out condition is met.

The indicating lamp comprises an LED or other small-sized filament indicating lamps, an MCU circuit drives the LED lamp to be used as an under-voltage release working state indicator after sampling the power grid voltage through a microprocessor and calculating, the LED lamp is used as an under-voltage release working state indicator when the power grid input is in a non-under-voltage normal working state and is bright, the LED lamp is used for flashing at a lower frequency when the power grid input is in an under-voltage delay stage, the LED lamp is used for flashing at a higher frequency when the input voltage exceeds an upper limit value (120 percent Ue, overpressure) of a national standard specified voltage level, and the LED lamp is used for flashing at a very slow frequency when the power grid input voltage does not reach an actuation voltage value of 85 Ue, and whether the LED lamp is in a state represented by flashing or flashing frequency can be further combined in various changes. The indicating lamp can also adopt a bicolor or multicolor LED, so that the effect of different working states of the release is more highlighted.

The driving circuit is a circuit consisting of power MOS tubes, an SCR (silicon controlled rectifier), a triode circuit or a power module circuit.

The power supply circuit is in a switch mode or in a series voltage reduction mode.

As shown in fig. 2, the MCU circuit reads (for example) the DIP state of the 7-bit dial switch through a port pulled up to a high level inside the microprocessor U1, where bits 1 to 6 of the dial (for example) are respectively delay time values 0.3s, 0.5s, 0.7s, 1s, 3s, and 5s setting bits, and bit 7 of the dial is a mode switching bit, and is pulled down (to the right in the drawing), the microprocessor U1 reads in a high level to represent that the dial is OFF (OFF, invalid), and the microprocessor U1 reads in a low level to represent that the dial is ON (ON, valid), and after the internal program of the U1 is logically not, the time values represented by bits 1 to 6 of the dial are accumulated to identify the working mode of the 7 bit of the dial.

As shown in fig. 3, a 7-bit dial and 1 indicator are combined with a frame and an identifier thereof to perform "panel" arrangement of a release product, a time value represented by 1-6 bits of the dial is subjected to a numerical calculation method of summation, 63 time value combinations can be obtained, the minimum value is 0.0s, the undervoltage release is an instantaneous undervoltage release, the time value is set from 0.3s to 10.5s, the undervoltage release is a delay type undervoltage release, the time value is used for setting undervoltage "delay release time", the 7 th dial is a common undervoltage (working) mode in the dial-up (N), a zero-voltage (working) mode in the dial-down (Z), and a State indicator is used for representing the working State of the release.

Claims

1. The utility model provides an undervoltage release with mode switching function which characterized in that: the intelligent control circuit comprises a rectifying circuit, a power circuit, an MCU circuit, a driving circuit, an electromagnet and a dial switch, wherein the rectifying circuit outputs a direct current power supply magnet and the power circuit, the power circuit respectively supplies power to the MCU circuit and the driving circuit, the MCU circuit samples the rectifying circuit, provides a control signal to the driving circuit after operation judgment, controls the current on-off of the electromagnet, and comprises an indicator light and a flicker form of the indicator light to represent the current working state of a release, and the dial switch sets the working mode of the MCU circuit and the time delay value.

2. The undervoltage trip unit with the mode switching function of claim 1, wherein: the dial switch comprises an independent or combined dial switch, the dial state is read by a CPU circuit, wherein 1 bit or 2 bits are used for switching/setting the working mode of the undervoltage release, and the rest bits are used for setting a delay value required to be set by the undervoltage release in the delay stage.

3. The undervoltage trip unit with the mode switching function of claim 1, wherein: the indicating lamp comprises an LED or other small-sized filament indicating lamps and is used for indicating the working state of the undervoltage release, indicating no electricity when the indicator is not on, indicating the normal working state that the input voltage of the power grid is not undervoltage when the indicator is on for a long time, indicating the undervoltage delay state when the indicator flickers according to a certain lower frequency, indicating that the input voltage exceeds the upper limit value of the national standard specified voltage grade when the indicator flickers according to a certain higher frequency, indicating that the undervoltage release is in the standby state when the indicator flickers very slowly, namely, the input voltage of the power grid does not reach the attraction voltage value of 85 Ue yet.

4. The undervoltage trip unit with the mode switching function of claim 1, wherein: the rectification circuit is a full-bridge circuit formed by combining discrete components or a full-bridge module.

5. The undervoltage trip unit with the mode switching function of claim 1, wherein: the MCU circuit samples, calculates and judges the voltage of the power grid through an internal program and outputs a control signal; and the microprocessor in the MCU circuit is SOC, FPGA or DSP.

6. The undervoltage trip unit with the mode switching function of claim 1, wherein: the driving circuit is a circuit consisting of power MOS tubes, an SCR (silicon controlled rectifier), a triode circuit or an integrated power module.

7. The undervoltage trip unit with the mode switching function of claim 1, wherein: the power supply circuit is a switch-type power supply circuit or a series voltage reduction-type analog power supply circuit.