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DJTZ23-WS1c Concentrator
The DJTZ23-WS1c concentrator is an important component of the low-voltage power line carrier centralized meter reading system. The concentrator compli
Product details
The DJTZ23-WS1c concentrator is an important component of the low-voltage power line carrier centralized meter reading system. The concentrator complies with the State Grid Corporation of China's Q/GDW 1375.2-2013, Q/GDW 1374.2-2013 and other "Power User Electricity Information Collection System" series standards, and applies modern digital communication technology, embedded technology, computer software and hardware technology, low-voltage power line carrier technology, etc. to collect and analyze electricity demand side information. It integrates functions such as low-voltage carrier meter reading, active reporting, AC analog quantity acquisition, valve controlled power-off, and anti electricity theft. Concentrators can easily modify device parameters locally/remotely and support online software upgrades locally/remotely; The large capacity motherboard FLASH storage chip ensures convenient storage of various data; ABS waterproof and flame-retardant material, wall mounted structure, lightweight and easy to install. This concentrator has the characteristics of powerful functionality, simple use, stable operation, easy maintenance, high reliability, large storage capacity, good openness, and high cost-effectiveness. It can well meet the application needs of users in transformer side monitoring, remote meter reading, anti-theft and other aspects.
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1. Data collection
a. Energy meter data collection
Concentrators can collect data on electrical energy in real-time, automatically at regular intervals, or through automatic replenishment. The types of data collected include real-time energy readings from energy meters, real-time combined active power, daily zero freezing energy readings, daily zero freezing combined active power readings, meter reading daily zero freezing energy readings, and meter reading daily zero freezing combined active power readings.
b. State quantity collection
The concentrator collects real-time switch position status and other status information, records it in memory when a displacement occurs, and sends the displacement signal to it or actively reports it to the terminal during the latest main station query.
c. Communication analog quantity acquisition
The concentrator type I is equipped with analog acquisition functions such as voltage and current, which measure voltage, current, power, power factor, etc.
2. Data storage
Concentrator Type I can read 1024 single energy meters or 300 three-phase energy meters, with a data storage capacity of 64M.
Concentrator Type I can classify and store 31 days' zero point (next day's zero point) frozen energy data for each energy meter, 12 months' zero point frozen energy data at the end of the month, and 24 hourly energy data for 10 days for 20 key users (key users generate curve data according to a collection interval of 1 hour).
The number of meter readings for concentrator type II shall not be less than 192.
3. Public substation energy metering
The concentrator type I has the function of collecting AC analog signals. When calculating the electrical quantities of the public transformer, it realizes the measurement of the electrical energy of the public transformer. It measures and stores the total and phase specific active energy, maximum demand and occurrence time, and total reactive energy in both directions, and can be set and displayed. The accuracy of active energy measurement reaches level 0.5, and the accuracy of reactive energy measurement reaches level 2.
4. Parameter settings and queries
a. Clock calling and timing
The concentrator adopts a built-in hardware clock circuit with temperature compensation, and the internal clock terminal outputs a frequency of 1Hz. Within the temperature range of -25 ℃ -60 ℃, the clock accuracy is ≤ 0.5S/d, and at the reference temperature (23 ℃), the clock accuracy is ≤ 0.3S/d. The concentrator can receive clock call and timing commands from the main station or local handheld devices, and can also broadcast timing to the system's data collectors or broadcast timing to the energy meter through the local channel.
b. Parameter settings and queries
The concentrator can be remotely set and queried by the main station or locally through handheld devices for concentrator files, concentrator communication parameters, meter reading parameters, limit parameters, etc.
5. Event record
The concentrator can classify and record events into important and general events based on the set event attributes. The concentrator can store the last 500 event records, and the main events recorded are shown in Table 1.
Table 1 Event Records
|
Serial Number |
data item |
data source |
|
1 |
Data initialization and version change records |
terminal |
|
2 |
Parameter loss record |
terminal |
|
3 |
Parameter change record |
terminal |
|
4 |
State variable displacement record |
terminal |
|
5 |
Parameter changes of electric energy meter |
terminal |
|
6 |
Abnormal current circuit |
terminal |
|
7 |
Abnormal voltage circuit |
terminal |
|
8 |
Abnormal phase sequence |
terminal |
|
9 |
The time of the electric energy meter exceeds the tolerance |
terminal |
|
10 |
Fault information of electric energy meter |
terminal |
|
11 |
Terminal stopped/Power on event |
terminal |
|
12 |
voltage/Current imbalance exceeds the limit |
terminal |
|
13 |
Capacitor switching self-locking |
terminal |
|
14 |
Message authentication error record |
terminal |
|
15 |
Terminal fault record |
terminal |
|
16 |
Record of differential over limit event of active total electrical energy |
terminal |
|
17 |
Record of voltage exceeding the limit |
terminal |
|
18 |
Record of current exceeding the limit |
terminal |
|
19 |
Visual power exceeding limit record |
terminal |
|
20 |
Decrease in electrical energy expression |
terminal |
|
21 |
Electric energy exceeds the tolerance |
terminal |
|
22 |
The electric energy meter flies away |
terminal |
|
23 |
The electric energy meter stops running |
terminal |
|
24 |
485Meter reading failed |
terminal |
|
25 |
The communication traffic between the terminal and the main station exceeds the threshold |
terminal |
|
26 |
The operation status word of the electric energy meter changes position |
terminal |
6. Local maintenance
a. Local status indication
The concentrator has indicator lights such as power supply, alarm, cascade 485, meter reading 485, etc.
b. Local extension interface
The concentrator is designed with a local communication interface, which can read the assessment table data of the substation area and support communication between the cross sampling device and reactive power compensation device used for distribution transformer monitoring.
c. Local maintenance interface
The concentrator is designed with infrared communication ports, RS232 serial ports, and RJ45 Ethernet interfaces, supporting parameter settings and on-site reading of electrical energy data on handheld devices or PCs, and has permission and password management to prevent unauthorized personnel from operating.
d. Self inspection
The concentrator can automatically perform self inspection, record events and issue alarms upon discovering equipment (including communication) abnormalities.
e. Software upgrade
The concentrator supports local and remote software downloads and upgrades, with remote support for breakpoint resume mode.
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