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DJGL33-WS1c Concentrator
The DJGL33-WS1c concentrator is the central management and control device of the low-voltage power grid energy management system, responsible for the
Product details
The DJGL33-WS1c concentrator is the central management and control device of the low-voltage power grid energy management system, responsible for the transmission of system commands, data communication, network management, event recording, and other functions. It has the characteristics of high reliability, high precision, and low power consumption. The upstream channel of the concentrator communicates with the meter reading master station through wireless public network or Ethernet; The downlink channel communicates with various meters through 485 according to the DL/T 645 communication protocol.
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TECHNICAL INDEX
Reference temperature and reference humidity
The reference temperature is 23 ° C; The reference humidity is (40-60)% RH.
2 Temperature and humidity range
The climate and environmental conditions for the normal operation of the concentrator equipment are shown in the table.
|
Type of venue |
level |
air temperature |
humidity |
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|
Range ℃ |
maximum rate of changea℃/h |
relative humidityb% |
Maximum absolute humidityg/m3 |
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|
outdoors |
C3 |
-40～+70 |
1 |
10～100 |
35 |
|
aTemperature change rate5minAverage value over time.
BRelative humidity includes condensation. |
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3 Atmospheric pressure
66.0kPa~108.0kPa (altitude 4000m and below), except for special requirements
4 Mechanical effects
The concentrator equipment can withstand mechanical vibrations and impacts under normal operation and conventional transportation conditions without causing failure or damage. Mechanical vibration intensity:
——Frequency range: 10Hz to 150Hz;
——Displacement amplitude: 0.075mm (frequency ≤ 60Hz);
——Acceleration amplitude: 10m/s2 (frequency>60Hz).
5 working power supply
Adopting AC single-phase power supply.
6 Rated values and allowable deviations
Rated voltage of working power supply: 220V, allowable deviation -20% to+20%; Frequency: 50Hz, allowable deviation -6% to+2%.
7 Power consumption
In non communication state, the apparent power consumed by the concentrator should not exceed 5VA, and the active power should not exceed 3W.
8 Power loss data and clock retention
After the power supply of the concentrator is interrupted, it can communicate with the main station three times (report the power outage event immediately after the power outage) and work normally for 1 minute, while maintaining data and clock for two months. When the power is restored, the saved data is not lost and the internal clock runs normally.
9. Anti grounding fault capability
When the power supply of the concentrator is supplied by a three-phase four wire distribution network that is not effectively grounded or has a neutral point that is not grounded, in the event of a ground fault and a relative overvoltage of 10%, the voltage between the two ungrounded phases will reach 1.9 times the nominal voltage; In this case, the concentrator will not be damaged. After the power supply is restored to normal, the concentrator can work normally and save data without any changes.
10 Insulation resistance
The insulation resistance requirements for each electrical circuit of the concentrator to ground and between each electrical circuit are shown in Table 2:
Table 2 Insulation Resistance
|
rated insulation voltageV |
insulation resistanceMΩ |
testing voltageV |
|
|
normal conditions |
Damp and hot conditions |
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|
U≤60 |
≥10 |
≥2 |
250 |
|
60＜U≤250 |
≥10 |
≥2 |
500 |
|
U＞250 |
≥10 |
≥2 |
1000 |
|
Note: The interface circuit directly connected to the secondary equipment and external circuit adoptsU＞250VThe requirements. |
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11 Insulation strength
The insulation strength test between the ground and electrically isolated circuits of the power circuit, AC power input circuit, and output circuit, as well as between the normally open contact circuits of the output relay, can withstand the 50Hz AC voltage specified in Table 3 for 1 minute. No breakdown or flashover occurred during the experiment, and the leakage current was less than 5 mA.
12 impulse voltage
The power supply circuit, AC power input circuit, and output circuit can withstand the peak impulse voltage specified in Table 4, with 5 positive and 5 negative polarities, between each circuit that is grounded and has no electrical connection. There is no destructive discharge (breakdown, flashover, or insulation breakdown) during the experiment.
13 Electromagnetic compatibility
The concentrator can withstand electromagnetic interference from conduction and radiation, as well as the effects of electrostatic discharge. The equipment is undamaged and can operate normally.
14 Electrical clearances and creepage distances
The exposed live parts shall have the minimum electrical clearance and creepage distance specified in Table 6 between the ground and other live parts, as well as between the outgoing terminal screws and the metal cover plate.
15 temperature rise
The concentrator power circuit is loaded with 1.15 times the rated voltage, and the temperature rise on the outer surface does not exceed 25K at an ambient temperature of 40 ℃.
16 Service life
The normal service life of the concentrator is greater than 10 years.
17 Continuous power on stability
The concentrator is continuously powered on for 72 hours in normal working condition, and sampling tests are conducted every 8 hours during the 72 hour period. Its function and performance meet the relevant requirements.
18 Reliability
The mean time between failures (MTBF) of the concentrator is greater than 7.6 × 104 hours.
19 Accuracy of Data Collection
When the concentrator directly collects data from the energy meter, the cumulative energy reading collected by the concentrator is consistent with the energy indication value.
20% success rate of data collection
In an environment where both the energy meter and wiring are normal, the success rate of the concentrator in collecting energy meter data can reach 100%.
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