Substation Data Concentrator Unit GSM GPRS PLC PLUG AND PLAY RTU meter DATA logger

1.Overview

DJGZ23-DF6203 data concentrator unit is specially designed for the centralized meter reading via low-voltage power line carrier. For the uplink communication, the modularized public communication network is adopted to be compatible with the communication modes such as GPRS, CDMA, PSTN, network, etc. For the downlink communication, the power line carrier or RS485 interface is adopted to communicate with the concentrator and the KWh meter, and acquire the energy data and events of energy data which will be stored and calculated via the energy concentrator, and be sent to the master station via the uplink channel. Besides, the parameters of KWh meter can be maintained and set as specified by protocols and as required by users.

This product conforms to both domestic and international standards, including the relevant standards of the International Electrotechnical Commission (IEC).

This manual provides an overview of structural size, functional configuration, technical parameter, operation guide, etc. of DJGZ23-DF6203 data concentrator unit.

It has several communications, include PLC,RS485,GRPS,Internet protocal,USB....

2. Function Description

2.1 Data Acquisition

To call in real time or read automatically real-time electric quantity, electric quantity frozen at 12 o’clock (or other customized time) midnight per reading day and electric quantity frozen at 12 o’clock(or other customized time) per day of KWh meters based on the given intervals of reading. Among them, the data items of frozen electric quantity of single-phase KWh meter and three-phase KWh meter include as follows: total electric quantity of forward active power, peakpeak, peak, mean, vale rate electric quantity of forward active power, and total electric quantity of forward reactive power. When being saved, electric quantity data shall be accompanied with time stamps.

There are generally three modes of acquisition:

Real-time acquisition: the concentrator reads designated data items, parameters and event data of KWh meters.

Automatic acquisition based on intervals: the concentrator automatically reads data of KWh meters according to meter reading commands from master station.

Automatic data call: the concentrator automatically calls data that is missed.

Acquired data items are as shown below:

Realtime and current data

2.2On-site Meter Reading

Available to enable the handheld meter reader to read, via the local infrared port, the electric quantity data on site to be input into the master station

Available to perform the functions of self diagnosis and abnormal information record

Available to make selfcheck, record and alarm the unit exception (including communication) if any.

2.3Time Check

The energy concentrator is provided with the timing units available to be checked by the master station. The timing units, with the daily timing error ≤±0.5s/d, can be checked by the master station only once a day.

The energy concentrator can check the time, in a broadcasting way, for the collector and for the KWh meter that function as a clock inside the system via the downlink channel. Time check in a broadcasting way is allowed only once a day.

2.4Parameters Setting

Available to be set remotely or locally:

1. a.   No. (12 digits);
2. b.   Ringing times (off-hook condition), meter reading day, communication address of master station (including master channel and backup channel) as necessary for communication;
3. c.    Meter reading plans (reading interval, automatic meter reading day, meter reading time, reading data item, etc.)
4. d.   Multiplying factor of total meter
5. e.   Route
6. f.    Meter file, etc.

2.5Remote Upgradeability

The energy concentrator is provided with the remote or local upgradeability. The upgrading in the mode of continued downloading at the points is supported, while the upgrading via message channel is not supported. The local upgrading can be performed under the condition that the external cover is not opened and hardware is matched for protection.

2.6Power Failure Data Retention

In case of instant and long-time power failure, equipment misreading will not arise, while measures will be taken for equipment to retain data for above four months; in case of power recovery, data retained cannot be lost, and internal clock can work normally. 

2.7Key Users

Some users’ meters of a certain transformer can be selected as the key users’ meters which are under special supervision. The total electric quantity data of forward active power of key users’ meters can be saved by the energy concentrator on an hourly basis. The number of users’ meters under special supervision freely set by the energy concentrator shall be not more than 20. The energy concentrator can save history data of total electric quantity of on-the-hour forward active power of key users’ meters in recent 30 days at a minimum.

2.8Data Transmission Credibility

The successful meter reading rate is 100% within 24 hours. The total error rate of all meter data read is 0.

2.9Security

The energy concentrator is designed to be provided with reliable safe measures to prevent unauthorized access to set parameters. The energy concentrator is able to save the logouts (abnormal alarm, etc.) of recent 50 times.

The energy concentrator is managed with the secondary password. The first password: Super user (username and password can be changed to facilitate the manufacturer to deliver products to the power supply bureau), and the secondary users can be authorized and all functions can be set; the secondary password: the user can be authorized by the super user (username and initial password allocated) for all functions settings and meter readings.

The energy concentrator can judge and refuse the call command and control command sent by the illegal master station.

2.10Storage Capacity

Each energy concentrator shall manage not less than 1000 sets of single-phase KWh meters and not less than 200 sets of three-phase KWh meters. In light of the maximum number of users designed for the energy concentrator, at a minimum, 31-day electric quantity data frozen at 12 o’clock and 12-month electric quantity data frozen in the end of month of the energy data of each user’s meter shall be saved; and 24-hour real-time electric quantity data of 20 key users’ meters shall be saved for 30 days. The special storage spaces shall be provided to separately save there types of data mentioned above. The data storage capacity shall be 8M bytes.

3. Operating Principle

The energy concentrator communicates with the management system of master station via the uplink channel, receives the command sent by the management system of master station, and transmits data to the master station; the energy concentrator, based on the command of master station, sends command to the carrier meter, set and read the relevant parameters of carrier meter via both-way communication with the carrier meter.

4. Electrical Performace

4.1 Power Source

Three-phase four-wire power supply: A, B, C, N;

Power Supply Voltage: Able to work normally at the rated voltage of (220/380V) ±20%;

Normal Work Efficiency: 50Hz ± 5%;

Overall Power Consumption: Apparent power ≤30VA; active power ≤10W;

The concentrator is able to work and communicate when one-phase voltage or two-phase voltage is opened.

4.2 Ambient Conditions

Based on the installation site, temperature and temperature conditions, three levels can be classified as follows:

Engine Room: Temperature at +5℃~+40℃, relative humidity ≤75%

Indoors: Temperature at -25℃~+50℃, relative humidity ≤90%

Outdoors: Temperature at -45℃~+70℃,  relative humidity ≤95%

4.3 Electromagnetic Compatibility (EMC)

Static Discharge: 8KV;

High Frequency Electromagnetic Field: 10V/m;

Electrical Fast Transient Impulse Train: 4KV;

Surge Voltage: 4KV.

4.4Internal Clock Accuracy

Less than 0.5s/d;

4.5Effective Period of Data Retention

50 years;

4.6Communication

Baud rate of infrared communication port can be set, with default baud rate of 1200BPS, even parity;

Baud rate of maintenance RS485 port can be set, with default baud rate of 9600BPS, without parity;

Baud rate of meter reading RS485 can be set, with default baud rate of 1200BPS, without parity;

4.7 Overall External Dimension 

290×180×95mm

5. Appearnce and Condtion Indication

5.1 Outline Drawing                       

5.2 Status Indication Description

Power LED indicates normal main power supply;

A, B, C three-phase work status LEDs indicate the current carrier communication phase of energy concentrator;

Sending and receiving LED on carriers indicates the downlink channel of energy concentrator-power line communication status;

Four status LEDs indicate the uplink channel of energy concentrator - GPRS(CDMA) communication status.

6. Installation and Utilizaiton

The energy concentrator power supply via three-phase four-wire: A, B, C, N;