CN213990115U

CN213990115U - Intelligent phase sequence, voltage and grounding detection control system

Info

Publication number: CN213990115U
Application number: CN202023091685.5U
Authority: CN
Inventors: 郭东明; 方博; 何恒奔; 王恒源
Original assignee: Henan Huadong Industry Control Technology Co ltd
Current assignee: Henan Huadong Industry Control Technology Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-17
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses an intelligence phase sequence, voltage and ground connection detection control system to solve prior art and can't carry out the technical problem that detects comprehensively and protect to power supply. The utility model discloses a major loop, detection module, control module, detection module carries out sampling detection and output control signal to the major loop, and control module receives control signal and controls the major loop, and detection module includes voltage detection unit, ground connection detecting element, a calculation unit, and voltage detection unit's input is connected in the live wire, and ground connection detecting element's input is connected in the ground wire, and voltage detection unit and ground connection detecting element's output are connected in a calculation unit. The beneficial effects of the utility model reside in that: the phase sequence, the voltage and the grounding are effectively monitored to meet the standard, and the circuit is timely disconnected in case of abnormity.

Description

Intelligent phase sequence, voltage and grounding detection control system

Technical Field

The utility model relates to a power detects control technical field, concretely relates to intelligence phase sequence, voltage and ground connection detection control system.

Background

With the development of society, the field and the place of power utilization are more and more popular, but the safety accidents of power utilization are more and more. The electric equipment is burnt out due to phase sequence errors, the equipment is damaged due to unstable voltage, and accidents such as personal electric shock and casualty can be caused due to the fact that no ground wire is used and a grounding system cannot reach the national standard.

In the case of the above situation which does not reach the standard, no device capable of providing comprehensive protection is available for redundancy protection.

SUMMERY OF THE UTILITY MODEL

The utility model provides an intelligence phase sequence, voltage and ground connection detection control system to solve prior art and can't carry out comprehensive detection and safety protection's technical problem to power supply.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the design one kind intelligence phase sequence, voltage and ground connection detect control system, including the major loop, detection module, control module, detection module carries out sampling detection and output control signal to the major loop, control module receives control signal and controls the major loop, detection module includes voltage detection unit, ground connection detecting element, first arithmetic unit, voltage detection unit's input is connected in the live wire, ground connection detecting element's input is connected in the ground wire, voltage detection unit and ground connection detecting element's output are connected in first arithmetic unit.

Further, the detection module comprises a transformer for supplying power to the detection module and the control module.

Furthermore, the detection module still includes phase sequence detecting element, and phase sequence detecting element includes opto-coupler, first resistance, first electric capacity, second resistance, and first resistance and first electric capacity are parallelly connected in the input of opto-coupler, and the input of first resistance, first electric capacity, second resistance is connected in three phase current.

Furthermore, the optocoupler and the first arithmetic unit are connected to a second arithmetic unit, and the output end of the second arithmetic unit is connected to the control module.

Further, the control module comprises an amplifier and a contactor, the contactor comprises a coil and a contact, the input end of the amplifier is connected with the detection module, the output end of the amplifier is connected with the coil of the contactor, and the contact of the contactor is arranged in the main loop.

Further, the voltage detection power supply comprises a first voltage comparator connected to the positive input end and the negative input end of the power supply, and the grounding detection unit comprises a second voltage comparator connected between the negative input end of the power supply and the ground wire.

Furthermore, an input voltage display meter is arranged at the input end of the main loop, and an output indicator lamp is arranged at the output end of the main loop.

Compared with the prior art, the utility model discloses a main beneficial technological effect lies in:

the utility model is arranged at the front end of a load power supply, when the phase sequence of an incoming line power supply is correct, the voltage amplitude is within the standard, the ground wire is well wired, and the grounding resistance value meets the requirement of the national grounding standard, the device works to output power supply externally, and a user side is electrified; when any one or more of the four indexes are not met, the device does not output, and the user side is powered off, so that subsequent equipment is protected from being burnt out and personal safety is protected.

Drawings

Fig. 1 is the utility model discloses intelligence phase sequence, voltage and ground connection detect control system's schematic structure.

Fig. 2 is the utility model discloses intelligence phase sequence, voltage and ground connection detect control system's three-phase electricity control circuit diagram.

Fig. 3 is the single-phase electric control circuit diagram of the intelligent phase sequence, voltage and ground detection control system of the present invention.

Detailed Description

The following embodiments are only intended to illustrate the present invention in detail, and do not limit the scope of the present invention in any way.

The programs referred to or relied on in the following embodiments are all conventional programs or simple programs in the art, and those skilled in the art can make routine selection or adaptation according to specific application scenarios.

The unit modules, components, structures, mechanisms, sensors, and other devices referred to in the following examples are all conventional commercially available products unless otherwise specified.

Example 1: an intelligent phase sequence, voltage and grounding detection control system, see figure 1, comprises a fixed or movable control box body, wherein a main circuit in the box body comprises an input power supply terminal, a power output device and an output power supply terminal, the power supply terminal selects a corresponding wiring terminal according to load current, a digital display voltmeter is connected to the input power supply terminal and used for displaying input voltage, an indicator lamp is connected to the output power supply terminal and is lightened when output is performed, and the digital display voltmeter is extinguished when no output is performed and used for indicating whether normal output is performed.

And a detection control board is also arranged in the box body and used for detecting whether the input voltage is in an allowable range, detecting whether the phase sequence is correct, detecting whether the grounding wire is connected or not, detecting whether the grounding wire reaches the national grounding standard or not, outputting a signal if all four items are in accordance, and switching off the output signal by using a power output device if one or more items are not in accordance.

The circuit structure of the detection control board is as follows:

for a three-phase electric control system, referring to fig. 2, power lines are A, B, C respectively, and are connected to load power supply terminals L1, L2 and L3 through a contact point KM of a contactor, where N is a zero line and PE is a ground line. An output indicator lamp R is connected between the L3 and the zero line N, and an input voltage acquisition display is connected between the three-phase power line and the contact KM. The power supply A, B, C outputs A1, B1 and C1 after being stepped down by the transformer 1, three outputs of the transformer are respectively connected with positive input ends of three voltage comparators, negative input ends of the three voltage comparators are connected with a zero line N, and input and output ends of the voltage comparator at the bottom end are respectively connected with the zero line N and a ground wire PE. The output of the four voltage comparators is connected with a gate operation circuit, when the power supply voltage is overlarge, the output low level corresponding to the upper three voltage comparators is high, if the ground is not connected or the ground is poor, the ground voltage is higher than the voltage of the N line, the fourth voltage comparator also outputs the low level, and if the four voltage comparators output the high level and indicate that the voltage and the ground are good, the gate operation circuit outputs the low level. The phase sequence detection refers to the optical coupler in the figure, when the detected phase sequence is A, B and C, the optical coupler cannot be driven, and no output voltage exists; when the sequence is not A, B and C, the optical coupler drives to output high level. When the phase sequence, the voltage and the grounding are good, the gate operation circuit outputs low level, the optical coupler outputs high level, the voltage comparator 4 outputs high level, the contactor is driven by the amplifier in the 5, the contact KM of the contactor is conducted, and the main circuit works normally. When the phase sequence, the voltage and the grounding are good, one part is abnormal, or the optical coupler outputs a low level (the phase sequence is abnormal), the OR gate operation circuit outputs a high level (the voltage/the grounding is abnormal), and at the moment, the voltage comparator in the step 4 outputs a low level, so that the contactor cannot be driven, the contact KM is disconnected after losing power, and the main circuit is cut off.

For a single-phase electric control system, referring to fig. 3, similar to a three-phase control system, since there is no problem of phase sequence, the optocoupler is no longer provided to detect the phase sequence abnormality.

The control system can be used for urban, rural, industrial, civil, fixed, mobile, permanent or temporary electric equipment and the like, and can effectively protect equipment safety and personal safety. The device is used for equipment with high requirement on the input voltage range, and the equipment can be prevented from being burnt out due to too low or too high voltage; whether the input phase sequence is correct or not can be detected, and equipment damage or accidents caused by input phase sequence errors can be avoided for equipment with the input phase sequence requirements; the device can detect whether the ground wire exists or not, and can avoid the phenomenon that the static voltage rises to burn the device or cause personal injury accidents because the static electricity is gathered too much because the ground wire does not exist for the device needing to release the static electricity by the ground wire; the grounding effect can be detected, judgment can be given to the grounding wire which is not in the state grounding standard, and the phenomenon that the grounding wire is seen on the surface and the grounding effect is not actually achieved can be avoided, so that equipment damage or personal injury accidents such as electric shock occur. The equipment has simple wiring, can be made into a movable type or a fixed type only by connecting an inlet power line and an outlet power line and a ground wire, and has simple use and operation.

The present invention has been described in detail with reference to the accompanying drawings and embodiments, but those skilled in the art will understand that various specific parameters in the above embodiments can be changed without departing from the spirit of the present invention to form a plurality of specific embodiments, which are the common variation ranges of the present invention and will not be described in detail herein.

Claims

1. The utility model provides an intelligence phase sequence, voltage and ground connection detection control system which characterized in that: including major loop, detection module, control module, detection module is right the major loop carries out the sampling detection and exports control signal, control module receives control signal is right the major loop controls, detection module includes voltage detection unit, ground connection detecting element, first arithmetic unit, voltage detection unit's input is connected in the live wire, ground connection detecting element's input is connected in the ground wire, voltage detection unit with ground connection detecting element's output connect in first arithmetic unit.

2. The intelligent phase sequence, voltage and ground detection control system of claim 1, wherein: the detection module comprises a transformer and is used for supplying power to the detection module and the control module.

3. The intelligent phase sequence, voltage and ground detection control system of claim 1, wherein: the detection module still includes phase sequence detecting element, phase sequence detecting element includes opto-coupler, first resistance, first electric capacity, second resistance, first resistance with first electric capacity connect in parallel in the input of opto-coupler, the input of first resistance, first electric capacity, second resistance is connected in three phase current.

4. The intelligent phase sequence, voltage and ground detection control system of claim 3, wherein: the optical coupler and the first arithmetic unit are connected to a second arithmetic unit, and the output end of the second arithmetic unit is connected to the control module.

5. The intelligent phase sequence, voltage and ground detection control system of claim 1, wherein: the control module comprises an amplifier and a contactor, the contactor comprises a coil and a contact, the input end of the amplifier is connected with the detection module, the output end of the amplifier is connected with the coil of the contactor, and the contact of the contactor is arranged in the main loop.

6. The intelligent phase sequence, voltage and ground detection control system of claim 1, wherein: the voltage detection power supply comprises a first voltage comparator connected to the positive input end and the negative input end of the power supply, and the grounding detection unit comprises a second voltage comparator connected between the negative input end of the power supply and the ground wire.

7. The intelligent phase sequence, voltage and ground detection control system of claim 1, wherein: the input end of the main loop is provided with an input voltage display meter, and the output end of the main loop is provided with an output indicator lamp.