1、 Overview
DDS1791 2P single-phase rail mounted electric energy meterA new type of instrument designed and manufactured based on the actual electricity consumption of users, using the single-phase energy metering chip ADE7755 from ADI in the United States and advanced SMT and wave soldering processes. All technical indicators of this instrument comply with the requirements of GB/T17215.321-2008 Static AC Active Energy Meter and IEC62053-21 international standard.
2、 Specifications and main technical parameters
1. Model specifications
Model number |
Accuracy etc. level |
Reference voltage Un |
Rated current Ib |
Instrument constant imp/kWh |
Display mode |
DDS1791
|
Level 1 Or Level 2 |
220VAC 50Hz/60Hz |
2.5(10)A |
6400 |
LCD display Or measuring device display |
5(20)A |
3200 |
||||
10(40)A |
1600 |
||||
20(80)A |
800 |
2. Basic error limit
load current |
Power factor COS φ |
Basic error limit (%) |
|
1level |
Level 2 |
||
0.05Ib |
1.0 |
±1.5 |
±2.5 |
0.1Ib-Imax |
1.0 |
±1.0 |
±2.0 |
0.1Ib |
0.5 (Sensory) 0.8 (capacitive) |
±1.5 |
±2.5 |
0.2Ib-Imax |
0.5 (Sensory) 0.8 (capacitive) |
±1.0 |
±2.0 |
Note: Ib calibration current, Imax maximum current.
3. Start up
Under the conditions of reference voltage, reference frequency, and COS φ=1.0, the instrument should be able to continuously measure electricity with a load current of 0.004Ib (level 1) or 0.005Ib (level 2).
4. Stealth
When the voltage circuit is applied with 115% of the rated voltage and there is no current in the current circuit, the test output of the instrument should not generate more than one pulse within the specified time.
5. Voltage range
Normal operating voltage: 0.9Un-1.1Un
Maximum operating voltage: 0-1.15Un
6. Power consumption
Voltage line ≤ 2W and 10VA
Current line ≤ 0.6VA
7. Climatic conditions
Normal operating temperature: -10 ℃+45 ℃
Extreme working temperature: -25 ℃+55 ℃
Storage and transportation temperature: -25 ℃+70 ℃