CN111308145A - Uninterrupted meter changing auxiliary power supply box with error correction protection function - Google Patents

Abstract

The invention discloses a non-power-outage meter change auxiliary power supply box with an error correction protection function, which comprises a detection main control module and a line breaker, wherein a user meter box is connected with the input end of a line control breaker through an incoming cable, the output end of the line control breaker is connected through an outgoing cable, each phase circuit connected with the input end of the line control breaker is provided with a current transformer, the three current transformers are connected to the current transformer interface of the detection main control module together, each phase connected with the input end of the line control breaker is respectively connected to an incoming voltage interface of the detection main control module, the line control breaker is connected to a breaker control interface of the detection main control module, and each phase connected with the output end of the line control breaker is respectively connected to an outgoing voltage interface; and all the phases in front of the outgoing switch of the user meter box are connected into an ammeter voltage interface of the detection main control module through detection cables. The uninterrupted meter changing auxiliary power supply box can ensure the continuous and safe power supply at a user and the safety of meter changing workers during meter changing.

Description

A kind of auxiliary power supply box with error correction protection function

technical field

The invention relates to an auxiliary power supply box with error correction protection function used in the field of power consumption data collection without power failure for meter replacement.

Background technique

With the increasing requirements of users for electricity consumption, non-stop meter replacement device has become the main development direction of technicians. Then the existing non-power-off meter replacement device can be installed in place without power failure during the first installation, and the subsequent meter replacement can achieve non-power-off operation, and this type of device can only be used for single-phase power users, and cannot be used in three-phase power. phase power supply.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide an auxiliary power supply box for uninterrupted meter replacement with error correction protection function, which is easy to operate and reliable in connection, and can ensure continuous and safe power supply at the user during meter replacement. Safety of table staff.

A technical solution to achieve the above purpose is: an auxiliary power supply box for uninterrupted meter replacement with error correction protection function, which is used to connect with three-phase user meter boxes, and the user meter boxes are A-phase, B-phase, and C-phase respectively. And N phase, this auxiliary power supply box with error correction protection function for meter replacement without power failure includes detection main control module and circuit breaker;

The A-phase, B-phase, C-phase and N-phase before the incoming switch of the user's meter box are respectively connected to the input end of the line-controlled circuit breaker through the incoming cable, and the A-phase, B-phase, B-phase, The C-phase and N-phase are respectively connected to the output end of the wire-controlled circuit breaker through outgoing cables, and the A-phase, B-phase and C-phase circuits connecting the input end of the wire-controlled circuit breaker are respectively provided with a current transformer, three The current transformers are jointly connected to the current transformer interface of the detection main control module, and the A-phase, B-phase, C-phase and N-phase of the input end of the connection wire-controlled circuit breaker are respectively connected to the detection main control module. A-phase incoming line voltage interface, B-phase incoming line voltage interface, C-phase incoming line voltage interface and neutral line interface, the wire-controlled circuit breaker is connected to the circuit breaker control interface of the detection main control module, and the wire-controlled circuit breaker is connected to the circuit breaker control interface of the detection main control module. The A-phase, B-phase, and C-phase of the output end of the circuit breaker are respectively connected to the A-phase outgoing line voltage interface, the B-phase outgoing line voltage interface, and the C-phase outgoing line voltage interface of the detection main control module;

The A-phase, B-phase and C-phase cables in front of the outlet switch of the user meter box are respectively provided with detection clips, and are connected to the A-phase electricity meter voltage interface, B-phase electricity meter voltage interface and C-phase electricity meter of the detection main control module through the detection cable. voltage interface.

Further, an A-phase power indicator light and a B-phase power indicator light are respectively connected between the A-phase and the N-phase, between the B-phase and the N-phase, and between the C-phase and the N-phase of the input end of the wire-controlled circuit breaker. , C-phase power indicator.

Further, the detection main control module is connected with the input module.

Further, the detection main control module is connected with the display module.

Further, the detection main control module is connected with the alarm module.

The present invention provides an auxiliary power supply box for uninterrupted meter replacement with error correction protection function, which provides an auxiliary power supply circuit for realizing uninterrupted replacement of a three-phase electric energy meter, and warns and protects possible operation errors in the process of wiring and meter replacement. , to ensure the safe and reliable completion of the table change operation.

Description of drawings

FIG. 1 is a schematic structural diagram of the connection between an auxiliary power supply box for uninterruptible meter replacement with error correction protection function of the present invention and a user meter box.

Detailed ways

In order to better understand the technical solutions of the present invention, the following specific examples are described in detail:

Please refer to FIG. 1 , the connection relationship between the auxiliary power supply box for uninterruptible meter replacement with error correction protection function of the present invention and the user meter box is as follows.

User meter box 1 is A phase, B phase, C phase and N phase respectively.

The auxiliary power supply box for uninterrupted meter change with error correction protection function of the present invention includes a detection main control module 2 and a circuit breaker 3 .

The A-phase, B-phase, C-phase and N-phase before the incoming switch 11 of the user meter box 1 are respectively connected to the input terminal of the line-controlled circuit breaker 3 through the incoming cable 4, and the A-phase behind the outgoing switch 12 of the user meter box 1 , B-phase, C-phase and N-phase are respectively connected to the output end of the line-controlled circuit breaker 3 through the outgoing cable 5 . A current transformer 6 is respectively provided on the A-phase, B-phase and C-phase circuits connected to the input end of the wire-controlled circuit breaker, and three current transformers 6 are jointly connected to the current transformer interface of the detection main control module 2 . The A-phase, B-phase, C-phase and N-phase connected to the input end of the wire-controlled circuit breaker 3 are respectively connected to the A-phase incoming line voltage interface, B-phase incoming line voltage interface, C-phase incoming line voltage interface and Neutral interface. The wire-controlled circuit breaker 3 is connected to the circuit breaker control interface of the detection main control module 2 . The A-phase, B-phase and C-phase connected to the output end of the wire-controlled circuit breaker 3 are respectively connected to the A-phase outgoing line voltage interface, the B-phase outgoing line voltage interface, and the C-phase outgoing line voltage interface of the detection main control module 2 .

The A-phase, B-phase and C-phase cables in front of the outlet switch 12 of the user meter box 1 are respectively provided with detection clips, and are connected to the A-phase electricity meter voltage interface, B-phase electricity meter voltage interface, C-phase electricity meter voltage interface of the detection main control module 2 through the detection cable 7 Phase meter voltage interface.

Connect an A-phase power indicator 31, B-phase power indicator 32, C-phase power indicator light 31 between the A-phase and N-phase, B-phase and N-phase, and C-phase and N-phase of the input end of the circuit breaker 3 respectively. Phase power indicator 33.

The detection main control module 3 is connected with the input module. The input module can have 16 keys and 2 keys with indicator lights.

The detection main control module 3 is connected with the display module. The display module can be a 320x240 dot matrix color LCD display module.

The detection main control module 3 is connected with the alarm module. The alarm module can sound the alarm for the buzzer.

The detection main control module 3 can adopt the processor of the NXP 16/32-bit ARM7TDMI-S core.

The operation process of using the auxiliary power supply box for meter replacement without power failure with error correction protection function of the present invention to perform meter replacement is as follows:

1. Preparation:

1) Check the user's power supply current to ensure that each phase is less than or equal to 20A;

2) Place the power supply box in the appropriate position of the accessories of the user's meter box;

2. Connect the power supply box;

1) Connect the incoming cable 4 of the A/B/C phase of the user meter box 1 in turn, so that the A-phase power indicator 31, the B-phase power indicator 32, and the C-phase power indicator 33 are lit;

2) Turn on the switch of the auxiliary power supply box for changing the meter without power interruption

3. Start the operation:

1) Start the detection by inputting the command, the screen displays the incoming line voltage value (VI) of each phase, and the phases are represented by different colors (A-yellow, B-green, C-red);

2) Connect the A/B/C phase outgoing cables 5 of the user meter box 1 in turn, and the screen displays the outgoing voltage (VO) of each phase;

3) Connect the A/B/C phase meter detection clip and detection cable 6 of the user meter box 1 in turn, and the screen displays the line voltage (VM) of each phase meter;

4) If the outgoing line voltage VO corresponds to the incoming line voltage VI, a green prompt will appear on the screen [please press the [access button]];

If the outgoing line voltage VO does not correspond to the incoming line voltage VI one-to-one, the screen will display a red warning [VO A/B/C phase error] and sound an alarm. At this time, pressing [Access Button] has no effect.

5) After pressing [Access Button], the screen will display [Please press [Confirm] key for access];

At this time, the operator is required to check the current data, and if there is no abnormality, press [Confirm];

If it is detected that the current of the power supply box is greater than the limit value at this time, the red outgoing line will prompt [IA/B/C current exceeds the limit], sound an alarm and disconnect the contactor;

* Power failure protection (enable in steps 5-10):

At this time, if you press the [Disconnect button], a red prompt will be displayed [Confirm to cut off the power supply and press [7]]. If you confirm that you need to cut off the power supply of the power supply box, press [7] and then press the [Disconnect button]. If you do not want to cut off the power supply, press [←] key to reply to the previous operation;

6) After pressing the [OK] key, the screen displays [Please disconnect the incoming line switch and press [8]];

At this time, please disconnect the incoming switch of the user meter box;

If the current value of each phase does not exceed the limit, you can press the [8] key;

*Current over limit protection (enable in steps 6-10):

If it is detected that the current of the power supply box is greater than the limit value at this time, it will display a red prompt [please reduce the load if the current exceeds the limit] and sound an alarm. If the current exceeds the limit after 5 seconds, the countdown number will be displayed, and the sound alarm will be accelerated. Power off.

7) After pressing the [8] key, the screen displays [Please disconnect the outlet switch and press [9]];

At this time, please disconnect the outlet switch of the user meter box, and then press the [9] key.

8) After pressing the [9] key, the screen displays [Please change the table to complete and press [Confirm]];

At this point, the table change operation starts. After the table change is completed, press the [OK] key.

9) After pressing the [OK] key, the screen displays [Please turn on the incoming line switch and press [8]];

At this time, please close the incoming switch of the user meter box, and then press the [8] key;

If the line voltage VM of the meter does not correspond to the line voltage VI one by one, the screen will display a red warning [VM A/B/C phase error] and sound an alarm. At this time, the wiring of the user's meter box should be checked. Please press the [8] key after the problem is eliminated and there is no alarm.

10) After pressing the [8] key, the screen displays [Please turn on the outlet switch and press [9]];

At this time, please close the outlet switch of the user meter box, and then press the [9] key.

11) After pressing the [9] key, the screen will display [Press [Disconnect] to complete the table change].

At this time, press the [disconnect button], the power supply box is powered off, and the meter change operation ends.

4. Operation ends:

1) Turn off the power switch;

2) Remove each wire clip and probe in turn. Fill broken points on user cables with insulating material.

3) Put away all cables and test lines. The table change operation is completed.

Those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, but not to limit the present invention. Changes and modifications will fall within the scope of the claims of the present invention.

Claims (5)

1. The utility model provides a do not have a power failure and trade table auxiliary power supply case with error correction protect function for be connected with three-phase user table case, user table case is A looks, B looks, C looks and N looks respectively, and this do not have a power failure and trade table auxiliary power supply case with error correction protect function is including detecting host system and circuit breaker, its characterized in that:

the phase A, the phase B, the phase C and the phase N in front of the incoming line switch of the user meter box are respectively connected with the input end of the line control circuit breaker through incoming lines, the phase A, the phase B, the phase C and the phase N behind the outgoing line switch of the user meter box are respectively connected with the output end of the line control circuit breaker through outgoing lines, a current transformer is respectively arranged on the phase A, the phase B and the phase C circuits connected with the input end of the line control circuit breaker, the three current transformers are jointly connected with the current transformer interface of the detection main control module, the phase A, the phase B, the phase C and the phase N connected with the input end of the line control circuit breaker are respectively connected with the phase A incoming line voltage interface, the phase B incoming line voltage interface, the phase C incoming line voltage interface and the zero line interface of the detection main control module, the line control circuit breaker is connected with the circuit breaker control module, and the phase, The phase B and the phase C are respectively connected to an A-phase outlet line voltage interface, a B-phase outlet line voltage interface and a C-phase outlet line voltage interface of the detection main control module;

a phase cable, a phase cable B cable and a phase cable C cable which are arranged in front of the outgoing switch of the user meter box are respectively provided with a detection clamp, and are connected into an A phase ammeter voltage interface, a B phase ammeter voltage interface and a C phase ammeter voltage interface of the detection main control module through the detection cables.

2. The auxiliary power supply box with the error correction protection function for the uninterruptible power supply for the ammeter according to claim 1, wherein an a-phase power supply indicator lamp, a B-phase power supply indicator lamp and a C-phase power supply indicator lamp are respectively connected between the a phase and the N phase, between the B phase and the N phase, and between the C phase and the N phase of the input end of the connecting-by-wire circuit breaker.

3. The uninterruptible power supply replacement auxiliary power supply box with the error correction protection function as claimed in claim 1, wherein the detection main control module is connected with the input module.

4. The uninterruptible power supply replacement auxiliary power supply box with the error correction protection function as claimed in claim 1, wherein the detection main control module is connected with the display module.

5. The uninterruptible power supply replacement auxiliary power supply box with the error correction protection function is characterized in that the detection main control module is connected with the alarm module.

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