Zhejiang Tianyang Electric Technology Co., Ltd.

           （Introduction to smart meter)

    Our company has many years of experience in electric meter design and launches new smart meters, with the option of RS485、NB-LOT（5G）、4G、WIFI、 Bluetooth, ROLA、 Communication via carriers and other means.This series of instruments has the advantages of small size, high accuracy, good reliability and easy installation. The performance indicators comply with the national standards GB/T17215、GB/17883various technical requirements.

This series of instruments uses high-definition Duan LCD Display, it can be set with fine clock, rate period and other parameters, and has the function of power pulse output.Available RS485 The communication interface exchanges or wireless transmission of actual data with the upper computer, realizes remote meter reading, remote control pull-closing function, and remote prepaid recharge function, which greatly facilitates automatic power management.

1. Introduction to hardware function parameters

1.Peaks and valleys (many /Complex rate), time-sharing measurement（Optional)

2.Forward, reverse, active, reactive measurement

3.Voltage, current, active power, reactive power, power factor

4.Built-in time zone, battery, power outage wake-up function（Optional)

5.Overload protection: loss of pressure, loss of current, overvoltage, overcurrent, etc.

6.RS485 Communication, agreement: DL/T645-2007、MODBUS

7.Remote fee control: realize remote shutdown

8.Prepaid management: pre-recharge electricity bill, electricity bill is 0 and power is automatically cut off, mobile phone payment

9.Ladder electricity price, rate (peak flat valley) electricity price（Optional)

10.Communication method:default: RS485 Communication Optional: NB-LOT、4G、 Carrier, WIFI、 Bluetooth

2. Introduction to the power management system plan

I.1.Internet of ThingsProject scenario

This system designs an intelligent electricity metering and management system for commercial users such as commercial squares, property communities, farmers' markets, and campuses. It aims to achieve intelligent management of merchant electricity, so as to ensure the independence and safety of merchant electricity.The system management software stores and processes the data, and the system management software performs remote centralized meter reading, power sales, and shuts down operations to form documents such as texts required by the property management party, so as to realize the intelligent management of electricity consumption of merchants in the entire urban square.

two,System Introduction

Install or transform the meter system to realize remote automatic meter reading and mobile phone APP Prepaid, data query, mobile phone APP and paperless management, and cooperate with management software to realize the management of the meter system, thereby improving the refined management level of property energy consumption.

To this end, our company provides the following technical solutions through a preliminary understanding of this project and combined with our company's actual engineering experience in remote meter reading, automatic control and cloud service systems.

We recommend superior performance remote meter reading and mobile phone terminals to customers APP The remote meter reading prepaid system with payment function ensures that the equipment provided by the entire project is advanced, reliable in operation, easy to maintain and convenient to operate. Automatic control, manual control, and technical and economic performance are all leading, which not only meets the technical requirements of highly intelligent and system integration, but also meets the needs of system upgrades and system expansion in the future.

three,System functions

This system has the following functions to meet project requirements:

1. Expense management: energy payment and refund, comprehensive payment, copy and reading settlement, financial reconciliation, bill printing

2. Operation management: meter meter accompanying copy management, advanced configuration of meter, manual reading management, meter remote valve control, room timing subsidy, electricity meter power maintenance, account cancellation and cancellation, water meter water storage, account cancellation and cancellation

3. Archive management: area information, collector management, table equipment management, charging plan, room information, owner information

4. Record management: valve control record, copy and read record, manual copy and read record, notification record, power storage record, water storage record, operation record, room replacement record

5. Report management: water and electricity report, fee deduction details

6. Value-added services: property management, owner's demands

7. Data warning: abnormality of meter valve, abnormality of water meter valve, hydropower analysis, data reading abnormality

8. Data Archive: archiving of copy and reading records, archiving of copy and reading reports, and archiving of financial reconciliation

9. Task List

10. Visual large screen

11. Payment on mobile phone

12. Notice of arrears: SMS notification, telephone notification

Energy consumption management system or other system requirements can be customized

Our company has many years of experience in electric meter design and launches new smart meters, with the option of RS485、NB-LOT（5G）、4G、WIFI、 Bluetooth, ROLA、 Communication via carriers and other means.This series of instruments has the advantages of small size, high accuracy, good reliability and easy installation. The performance indicators comply with the national standards GB/T17215、GB/17883various technical requirements.

The multi-user power meter adopts a modular structure, with reasonable structure and complete functions.With two single-chip microcontrollers as the core, users complete the acquisition of electricity usage parameters, power calculation, processing, storage and user power usage control, providing users with a variety of functional choices.According to the load access method, there are two series of power meters: direct access type and transformer type meter.

Direct access single meter, accuracy: level 1.0, maximum number of product outgoing lines: 39 wires, transformer access meter, accuracy: 0.5 S， Maximum number of products qualifying lines: 24 lines,

Divide the meter into three series according to its function:

1、Normal type 8 x Series of electricity meters, with basic power metering and load control functions;

2、Student Apartment 9 x The series of power meters has single-loop, dual-loop, three-loop, three-loop type power meters, which meet the special needs of student apartment users to identify vicious loads, timed power outage, and power gift management.

3、Multiple rates 7 x Series of electricity meters can realize the ladder electricity price billing mode and any setting of the peak and valley billing mode during the time period.This series of meter has two settlement modes, postpaid meter performs monthly closing mode, and prepaid meter performs annual closing mode.The ladder is divided into three steps at most;A maximum of 8 periods per day can be divided into three pricing rates per step;For monthly junction meters, one year can be divided into two periods according to month to achieve the requirements of setting step electricity in some areas according to seasons;

For ordinary series of electricity meters and multi-rate series of electricity meters, the user type can realize any setting of the number of three-phase users and single-phase users (within the range of up to 39 outgoing lines), that is, a meter can be set up to 39 single-phase or 12 three-phase users, or less than 12 three-phase users are set up within the 39 line, and the remaining outgoing lines are any combination of single-phase users.

The display uses a dual-row high-brightness digital tube, which displays the meter information, the user account number and real-time power information in cycles.

The meter has RS485 Communication interface, available RS485 The bus connects all the meter and the upper computer to form a dedicated network, or uses it locally

1. Ordinary series of electricity meters: single rate, user type is single and three-phase user mixed settings

1.Positive counting, post-payment;

2.Positive counting, postpaid, with remote control function, can achieve maximum load limit;

3.Prepaid remote control meter, with underpaid power outage.Low residual alarm and maximum load limiting function;

2. Student apartment series of electricity meters, single-rate, prepaid and postpaid, are controlled-type electricity meters, which meet the basic requirements of electricity safety and electricity management of student apartments. According to the number of entry lines assigned by each user, they are divided into single loop, double loop and three loops.

1.Single and three-loop hybrid settings are set to pay electricity meter, and the three-loop user serial number is set first;

2.Single and double loop hybrid settings for prepaid electricity meter. Dual loop users occupy two adjacent outlet lines of the meter, and the two wires have different phases of the power supply;

3.Single and three-circuit hybrid settings are provided with post-paid electricity meter. Three-circuit users occupy three adjacent outlets of the meter, and the three-circuit power supply is a three-phase power supply;

3. Multi-rate series of electricity meters can realize different periods (seasons) and different electricity consumption stages (stairs), and different billing unit prices are implemented in different time periods, basically meeting the current electricity billing requirements in different regions of the country.The user type of multi-rate meter is the same as that of ordinary meter, and is a mixed setting of single and three-phase users.

1.Positive counting, post-paid electricity meter can be divided into 2 periods per year by season, and the electricity bill settlement method is monthly settlement;

2.Positive counting control type, postpaid electricity meter, can be divided into two periods per year by season, the electricity bill settlement method is monthly, with remote power on and off and maximum load limit;

3.Prepaid controlled power meter, the electricity bill settlement method is annual, with remote power on and off and maximum load limit;

1、Normal postpaid electricity meter

l The accumulated electricity consumption count, the power index: 0.1 degrees;

l The maximum qualifier for a single table: 36 lines, users can use a single three-phase user;

l According to the number of power meter outgoing wires, three specifications are designed: 12-wire, 24-wire, and 36-wire;

l 485Communication interface, remote data collection

2.Prepaid electricity meter

l The prepaid electricity function is 0 power or power outage, and when the power outage is not allowed, the power outage cannot be restored;

l Remaining power alarm function. When the user's remaining power is lower than the set alarm value, power outage will be performed for one minute, and the user's power information will flash, reminding the user to purchase power in time;

l It has the maximum load limit function. When the active power of any line load of the user exceeds the set limit value, overload and power outage will be performed and automatically restored in one minute;

l It has the function of accumulating electricity consumption, which is convenient for users to count electricity consumption;

l Swipe the card: Users purchase electricity cards, purchase electricity bills, use the card to swipe the electricity meter, and the electricity bills are rushed into the electricity meter

l 485Communication interface, remote data collection, remote payment, and remote control. 

3.Student Apartment Meter

l The maximum qualifier for single table: 36 lines, users can set arbitrarily by single or three loop users;

l Positive electricity consumption counts, realizing the function of first use of electricity and then payment;

l It has the maximum load limit function, and can be divided into 2 periods per day, and the limit power of each period is set separately to achieve different load limits during the day and at night, and to perform power outage during the overload;

l It has the function of limiting the number of times of continuous overload power outages. Within the allowed number of times of overload power outages, it will automatically reply in 1 minute after overload power outages. Otherwise, the power outage will be maintained and power outage can be supplied with instructions;

l It has a timed power-off function, and can have up to 8 time periods per day. The starting time of the first time period is 0:00 minutes, and the time period is divided into 1 minute.In one week as time unit, each user can set the power supply status at different times every day. During the time period of time, you can instruct to reply to power supply;

l It has a vicious load limiting function. When the load accessed by the user at one time is a pure resistive load, and the cut-off power is greater than the set vicious load recognition function start power, the principle is now implemented. The exception is that the change load is set by the user to the licensed load;

l User licensed load usage function.When the user sets a vicious load limit function, in principle, the use of vicious power will be restricted. In order not to affect the use of a specific load, up to 8 licensed loads can be set for the power meter. Each user can choose 8 kinds of allowed loads, and the use of vital power that belongs to the licensed load will not be restricted;