CN216720912U

CN216720912U - Comprehensive power supply control box

Info

Publication number: CN216720912U
Application number: CN202123223649.4U
Authority: CN
Inventors: 张灿锋; 张明冬; 刘子衿; 宋楚; 张慧
Original assignee: Nanjing Sanyi Photoelectric Technology Co ltd
Current assignee: Nanjing Sanyi Photoelectric Technology Co ltd
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-06-10
Anticipated expiration: 2031-12-21

Abstract

The invention discloses a comprehensive power supply control box, comprising: the intelligent power consumption monitoring system comprises an AC380V input interface, an input air switch leakage protector, a power consumption parameter display table, an AC contactor, an output air switch, an output interface, an AC/DC12V, a main control module, an AC leakage detection module, an analog quantity signal module, an alarm lamp, an alarm buzzer and a silencing button; the AC380V input interface is sequentially connected with an input air switch leakage protection and power utilization parameter display table, and the power utilization parameter display table is connected with an output air switch and output interface through an AC contactor; the AC380V input interface is connected with the AC/DC12V, the main control module and the AC leakage detection module in sequence, the main control module is connected with the AC contactor through the analog quantity signal module, and the analog quantity signal module is further connected with an alarm lamp, an alarm buzzer and a silencing button. The invention can detect the input voltage/frequency and the output current of one path of three-phase four-wire alternating current and respectively display the input voltage/frequency and the output current on the voltmeter, the frequency meter and the ammeter, and has the functions of over-voltage and under-voltage alarm protection, leakage voltage alarm protection and grounding alarm.

Description

Comprehensive power supply control box

Technical Field

The invention relates to the technical field of power supply control, in particular to a comprehensive power supply control box.

Background

In the prior art, a power supply control box is bulky and cannot adapt to a vehicle-mounted environment, voltage detection can be realized only by using a voltage transformer with a large volume, and the functions of over-voltage and under-voltage alarm protection, leakage voltage alarm protection and grounding alarm cannot be realized simultaneously.

Disclosure of Invention

The invention aims to solve the technical problem of providing a comprehensive power supply control box which can detect one path of three-phase four-wire alternating current input voltage/frequency and output current and respectively display the input voltage/frequency and the output current on a voltmeter, a frequency meter and an ammeter, has the functions of over-voltage and under-voltage alarm protection, leakage voltage alarm protection and grounding alarm, has small module volume for detecting voltage and strong reliability, and is very suitable for power supply control of vehicle-mounted equipment.

In order to solve the above technical problem, the present invention provides an integrated power control box, comprising: the intelligent power consumption monitoring system comprises an AC380V input interface, an input air switch leakage protector, a power consumption parameter display meter, an AC contactor, an output air switch, an output interface, an AC/DC12V, a main control module, an AC leakage detection module, an analog quantity signal module, an alarm lamp, an alarm buzzer and a silencing button, wherein the input air switch leakage protector is connected with the power consumption parameter display meter; the AC380V input interface is sequentially connected with an input air switch leakage protection and power utilization parameter display table, and the power utilization parameter display table is connected with an output air switch and output interface through an AC contactor; the AC380V input interface is sequentially connected with an AC/DC12V, a main control module and an alternating current leakage detection module, the main control module is connected with an alternating current contactor through an analog quantity signal module, and the analog quantity signal module is further connected with an alarm lamp, an alarm buzzer and a silencing button.

Preferably, the electricity parameter display meter comprises a three-phase ammeter, a three-phase voltmeter and a frequency meter.

Preferably, the input interface and the output interface of the AC380V adopt military aviation plug connectors. Safe and reliable and easily pull out and insert.

Preferably, the main control module is powered by the AC/DC12V for voltage detection, and performs data interaction with the analog quantity signal module and the alternating current leakage detection module in an RS485 communication mode.

Preferably, when the alarm lamp and the alarm buzzer are under-voltage, earth fault and leakage voltage fault, the corresponding alarm lamp is on, the buzzer intermittently rings to alarm, and the alarm sound of the buzzer is eliminated by pressing the silencing button.

The invention has the beneficial effects that: the invention can detect the input voltage/frequency and the output current of one path of three-phase four-wire alternating current and respectively display the input voltage/frequency and the output current on the voltmeter, the frequency meter and the ammeter, and has the functions of over-voltage and under-voltage alarm protection, leakage voltage alarm protection and grounding alarm; the voltage detection module samples the self-made alternating current input plate, so that the occupied space and weight of components are greatly reduced; the input/output sampling wiring terminal and the military aerial plug are safe, reliable and easy to plug and unplug; according to the requirements of customers, the protection values of the power supply control box can be set in a remote network port communication mode, and the protection values comprise an overvoltage protection value, an undervoltage protection value, an over-frequency protection value and an under-frequency protection value; when a fault alarm occurs, the control box sends out an audible and visual alarm to remind an operator on duty of the fault, and the audible alarm can be silenced.

Drawings

Fig. 1 is an electrical schematic block diagram of a power control box of the present invention.

Fig. 2 is a block diagram of an external interface of a master control module of the power control box of the present invention.

Fig. 3 is a block diagram of an external interface of an ac leakage detection module of a power control box according to the present invention.

FIG. 4 is a block diagram of the external interface of the analog signal module of the power control box of the present invention.

Fig. 5 is a wiring diagram of the control circuit of the voltage control box of the present invention.

Detailed Description

As shown in fig. 1, an integrated power control box includes: the intelligent power consumption monitoring system comprises an AC380V input interface, an input air switch leakage protector, a power consumption parameter display table, an AC contactor, an output air switch, an output interface, an AC/DC12V, a main control module, an AC leakage detection module, an analog quantity signal module, an alarm lamp, an alarm buzzer and a silencing button; the AC380V input interface is sequentially connected with an input air switch leakage protection and power utilization parameter display table, and the power utilization parameter display table is connected with an output air switch and output interface through an AC contactor; the AC380V input interface is sequentially connected with an AC/DC12V, a main control module and an alternating current leakage detection module, the main control module is connected with an alternating current contactor through an analog quantity signal module, and the analog quantity signal module is further connected with an alarm lamp, an alarm buzzer and a silencing button.

The power supply control box can distribute an input 380V power supply and divide the power supply into multiple paths of output, and the proportion is balanced, so that the possibility of three-phase unbalance is reduced to the maximum extent. The input and output adopt military aerial plug connectors, and the device is safe, reliable and easy to plug and unplug. The device has the functions of displaying voltage, current and frequency, and can visually check the current electricity utilization parameters. The overvoltage and undervoltage protection module is arranged inside the power supply, so that the output voltage can be automatically cut off when the voltage is too low or too high, and each subsequent electric device is protected from being damaged. When the voltage returns to the normal state, the power supply control box automatically restores the output. The protection value and the recovery value of the voltage can be set by a user to meet different use requirements. The grounding resistance measuring function is arranged inside the automobile body, whether the current grounding of the automobile body or the shell of the power control box is good or not can be measured, and when the grounding is poor, the sound-light alarm is automatically sent out to remind a user of paying attention. The internal part has the functions of measuring and protecting the leakage voltage, when the leakage voltage of the shell of the power control box is greater than 36VAC (national standard, human body safety voltage), the power control box gives out sound and light alarm and automatically cuts off all input and output voltages, thereby protecting the personal safety of users. The alarm has a silencing button, and when a customer is in trouble problem handling, the button can be used for silencing the alarm so as to avoid interfering normal operation.

The oil engine power supply input 380V is subjected to leakage protection of 125A/300MA, and short-circuit protection and leakage protection of electric equipment are performed.

The phase A is selected to supply power to a three-phase ammeter (for measuring current value), a three-phase voltmeter (for measuring voltage value) and a single-phase frequency meter (for measuring frequency value); the phase A is selected to be connected with a 12V switching power supply (alternating current 220V is converted into 12V direct current), and then power is supplied to the main control module and the analog quantity signal module; the phase A directly supplies power to the alternating current leakage detection module.

As shown in fig. 2, the main control module is a control motherboard and communicates with other modules through an RS485 port. Firstly, the A-phase, B-phase and C-phase three-phase alternating-current voltage detection is respectively carried out by T4, T3 and T2, if no overvoltage and undervoltage faults exist, the relay J5 of the analog quantity signal module is closed, the coil of the alternating-current contactor 1 is electrified, the normally open state is changed into the normally closed state, and power can be supplied subsequently. When the grounding resistance value and the leakage voltage value uploaded by the alternating current leakage detection module exceed the set alarm protection value, the main control module sends a grounding alarm or leakage voltage alarm signal to the analog quantity signal module.

As shown in fig. 3, the ac leakage detecting module: the vehicle body is connected with the box body shell in a grounding mode and used for protecting personal safety, and the testing ground is connected with the box body testing ground wiring terminal and used for protecting internal components; the grounding resistance and the drain voltage value can be detected, and the detection data are uploaded to the main control module.

As shown in fig. 4, the analog quantity signal module: the communication RS485 port is communicated with the main control module and receives the alarm signal of the main control module; when over-voltage and under-voltage are generated, the analog quantity signal module relay J2 and the relay J1 are attracted, an over-voltage and under-voltage alarm lamp is turned on, and a buzzer sounds; when the drain voltage is greater than the set alarm protection value, the analog quantity signal module relay J3 and the relay J1 are attracted, the drain voltage alarm lamp is on, and the buzzer sounds; when the grounding resistance value is larger than the set alarm value, the analog quantity signal module relay J4 and the relay J1 are attracted, the grounding alarm lamp is on, and the buzzer sounds; the silencing button can silence.

As shown in fig. 5, the control circuit is powered by DC12V, and each module directly performs data interaction in an RS485 communication manner.

After the AC contactor 1 is attracted, three-phase electricity respectively reaches the phase A collecting post 1, the phase B collecting post 1, the phase C collecting post 1 and the phase N collecting post 1. Then the three-phase electricity is connected with a 4P air switch to control the on-off of the output of the AC 380V; in addition, the B phase is connected with 1 2P air switch to control the on-off of 9 paths of AC220V outputs, and the B phase and the N line are respectively integrated on respective wire collecting columns; the C phase is connected with a 1P air switch to control the on-off of the electric oil-filled pump, and the C phase is additionally connected with 2 24V switching power supplies (converting 220V into 24V) to supply power for the illumination and the fan, and the illumination and the fan respectively use the 1P air switch to supply power for the illumination and the fan.

Claims

1. An integrated power control box, comprising: the intelligent power consumption monitoring system comprises an AC380V input interface, an input air switch leakage protector, a power consumption parameter display table, an AC contactor, an output air switch, an output interface, an AC/DC12V, a main control module, an AC leakage detection module, an analog quantity signal module, an alarm lamp, an alarm buzzer and a silencing button; the AC380V input interface is sequentially connected with an input air switch leakage protection and power utilization parameter display table, and the power utilization parameter display table is connected with an output air switch and output interface through an AC contactor; the AC380V input interface is connected with the AC/DC12V, the main control module and the AC leakage detection module in sequence, the main control module is connected with the AC contactor through the analog quantity signal module, and the analog quantity signal module is further connected with an alarm lamp, an alarm buzzer and a silencing button.

2. The integrated power control box of claim 1, wherein the electricity consumption parameter display meter comprises a three-phase current meter, a three-phase voltage meter and a frequency meter.

3. The integrated power control box of claim 1, wherein the AC380V input interface and the output interface are military aviation plug connectors.

4. The integrated power control box of claim 1, wherein the main control module is powered by AC/DC12V for voltage detection and data interaction with the analog quantity signal module and the AC leakage detection module in RS485 communication.

5. The integrated power control box of claim 1, wherein the alarm lamp and the alarm buzzer are turned on when under-voltage, ground fault and leakage voltage fault occur, the buzzer sounds the alarm intermittently, and the sound-deadening button is pressed to eliminate the alarm sound of the buzzer.