Test Bench for Smart Energy Meters (ST-9020)

1. Brief Introduction
ST-9020 Test device for smart energy meters is developed according to the enterprise standard issued by the State Grid Corporation. It can be used to complete the all experiments of acception test for smart energy meters. With the support of other relevant devices, it can also be applied to complete the random experiments of acception test, full peformance test and so on (a part of function experiments can be complete with the support of other devices). The framework of this product is made of aluminium material on the basis of standard configuration. So it is of the strong points such as beautiful appearance and perfect workmanship.

2. Function Features
1) It can automatically test electronic active & reactive energy meters.
2) It can be applied to automatically test energy meters' starting condition, running with no load, intrinsic error, meter constant, timing error within a day and so on according to the State Grid standard.
3) The system adopts the technique of digital real-time feadback and the software automatically calibrates the amplitude and phase of output. In this case, the precision of the output is high and the adjustment rate of load is low.
4) The experiment of RS485 communication and real time clock adopts an independent channel in a parallel mode. So it is of great effectiveness.
5) It is equipped with inspection function of expenditure-control to manage local and remote expenditure-controlled energy meters.
6) It is equipped with the function to test load switches.
7) It can be customised to detect and record the happing times and correct occuring time of events according to the national grid requirements Q/GDW 364-2009 (Technical Standard for Single-Phase Smart Energy Meters) and Q/GDW 354-2009 (Function Standard for Smart Energy Meters).
8) It can be applied to check the functions of smart meters such as remote control, alarm, impulse signal output, measurement, demand and period tariff.
9) It can be applied to check the energy meters' power consumption of voltage circuits and current circuits.
10) It can be applied to test the degression accuracy of the surplus energy for the smart energy meters with prepayment function.
11) It can be applied to conduct a consistency inspection to the smart energy meters'communication protocol according to the DL/T645-2007 energy meters communication protocol and its complementary documents.
12) It can be applied to tesr smart energy meters for their electrical measurement accuracy.

3. Technical Specification
1) Accuracy Class of Device: Class 0.1/0.2
2) Voltage Output
Measuring Range: 57.7V\100V\ 220V\380V(0.01%~120% adjustable)
Adjustment Fineness: 10%\1%\0.1%\0.01%
3) Current Output
Measuring Range: 0.1A~100A(transfer automatically)
Adjustment Fineness: 10%\1%\0.1%\0.01%
4) Max Output Power: 800VA
5) Stability Degree of Output Power: 0.05%;
6) Distortion Factor of Output Voltage and Current Waves:
0.5%(resistive load)
7) Frequency: Adjustment Range: 45Hz~65Hz
Adjustment Fineness: 5Hz\1Hz\0.1Hz\0.01 Hz
Accuracy: 0.02Hz
8) Phase: Adjustment Range: 0.0° ~359.99°
Adjustment Fineness: 10° \1° \0.1°
Accuracy: ± 0.5°
10) Operation Voltage Range: 220V± 10%
11) Max Power Consumption: 1000VA~5000VA(according to different epiposition)
12) Harmonic Wave: Times of Harmonic Wave 1~21
Amplitude of Harmonic Waves towards Relative Foundamental Wave: 0~40%
Phase of Harmonic Waves towards Relative Foundamental Wave Phase: 0~359°