DJLL33 - type GK760L Ⅱ concentrator (optical fiber)

Functional description

1 data acquisition function

Concentrator  gathering the real-time electricity watt-hour meter, day zero value for  freezing electricity, meter reading, zero value for the power value.  When electric power data with time scale.

Concentrator adopts the following method of watt-hour meter data:

A) real-time acquisition: concentrator direct acquisition by means of corresponding data of specified items.

B)  automatic timing acquisition: concentrator according to the scheme of  the main set of meter reading automatically collect data collector or  watt-hour meter.

C)  automatically copy: concentrator to not copy within the given time of  watt-hour meter reading data should be automatically copy function. Copy  fails, generate an event record, and can according to the report to the  master station set up.

2 data management and storage function

Concentrator  classifying data storage, mainly divided into day is frozen, meter  reading data freeze data and curve data, history data, etc. Freezing  curve data density of 1 h.

Data  storage capacity: each of the 31 days of watt-hour meter zero freeze  power data, 12 months per month 1, zero to freeze power data, and the  ten key users 10 days of 24 hour power data.

3 parameter setting and query function

Concentrator  can receive master station clock called measurement and command for  fashion. Can be remote or local Settings and query the meter reading  scheme, such as concentrator sampling cycle, meter reading time, data  entry, etc. Concentrator can according to set the event attributes,  record events according to the important events and the general  classification.

The main technical parameters

1 work power

Work power: use the ac single-phase power supply.

Rating  and allowable deviation: work: rated voltage 220 v / 380 v, the  allowable deviation 20% ~ + 20%; Frequency: 50 hz, allowable deviation  6% ~ + 2%.

Power  consumption: in the condition of the communication, the consumption of  collector apparent power is not more than 5 va, active power is not more  than 3 w. Concentrator of apparent power consumption is not more than  15 va, active power is not more than 10 w.

Data  and clock keep losing electricity: concentrator after interruption of  power supply, there are measures to keep data and clock, at least a  month. The power recovery, save the data is not lost, normal operation  of the internal clock.

Earth-fault  resistance: the power of the concentrator by the effective earthing  system or of a three-phase four-wire distribution network neutral point  grounding system of power supply, 10% in ground fault and relatively  overvoltage, under the condition of no grounding of two relatively  voltage will be 1.9 times the nominal voltage; In this case, the  terminal will not be damaged. Power supply back to normal after,  terminal can work normally, save the data no change.

2 environmental conditions

Reference temperature and humidity of the reference: a reference temperature is 23 ℃; Reference the humidity is 40% ~ 60%.

Temperature and humidity range: terminal equipment normal operation of the climate conditions to see the table below.

Climatic conditions Classification

Atmospheric pressure: 63.0kPa ~ 108.0kPa (4000m above sea level and below).

3 mechanical properties

Terminal  equipment can withstand the normal operation and under the condition of  the conventional transportation mechanical vibration and shock without  failure and damage. Mechanical vibration strength requirements:

- frequency range: 10 hz ~ 150 hz;

- the displacement amplitude: 0.075 mm (frequency of 60 hz or less);

- acceleration amplitude: 10 m/s2 (frequency of 60 hz).

4 the electromagnetic compatibility

Concentrator  can withstand the conduction and radiation of electromagnetic  disturbance and the influence of electrostatic discharge, equipment no  damage, and can work normally.

Electromagnetic  compatibility test items include: voltage sag and short supply  interruption, power frequency magnetic field immunity, radio frequency  electromagnetic field radiation

immunity,  rf field induced conduction harassment immunity, electrostatic  reactance immunity, and electrical transient bursts immunity, damped  oscillation wave immunity and surge immunity.

5 continuous power stability

Continuous  electricity 72 h concentrator in normal working state, during the  period of 72 h every 8 h of parking, its function and performance is  normal, ac voltage and current measurement accuracy satisfies the  requirement of grade.

6 reliability index

Concentrator of average trouble-free working time (MTBF) of no less than 7.6 x 104 h.

7 power consumption

In  the condition of the communication, the consumption of collector  apparent power is not more than 5 va, active power is not more than 3 w.  Concentrator of apparent power consumption is not more than 15 va,  active power is not more than 10 w.

8 insulation resistance

Concentrator  each electrical circuit to ground and the electric circuits of the  insulation resistance between the following table:

Wiring installation

Concentrator  is the main and auxiliary terminal connection as shown in the figure  below, the terminal function id see the table below. Meter reading 485  up to 32 meters only.

Wiring core terminal function identification