General
The Test Bench is designed in an innovative way and is able to test meters with closed U-I link without Isolating Current Transformers (ICTs).
Each test position has its own 3-phase Current Generator and Energy Standard Class 0.04 or 0.02.
The Test Bench can test all types of electricity meters – mechanical or electronic, single-phase or three-phase (Wye or Delta), for active, reactive or apparent energy.
Tests – Error, Register, Starting Current, No-Load, Constant, Maximum Demand, Load Only.
Components of the test bench
- A Three-Phase Voltage Source “EE-350V-bench” with up to 350 Vac generation per phase
- Three identical Modules “EE-120A-BENCH”, each comprising a 3-phase current generator in the range 1 mA to 120 A (100 VA per phase each) and a 3-phase Energy Standard Class 0.04 or 0.02
- Meter Suspension Rack with 3 positions for hanging the meter, Scanning Heads with 3D Mechanical Support, IR Optical Reader, Tariffs, Panic Button, Lamp,
- Error Indicator above each test position
- PC with EE Software for automatic control, search in MySQL Database, print of Test Reports, export in Excel, Statistics
Advantages
- Meter Tests with closed U-I links, no need of Isolating CTs or VTs
- Overall Accuracy – ±0.04% or ±0.02%; No additional Error from ICTs or voltage drops
- If a meter is missing, no need of re-connections, just switch off the Module
- Very safe, simple, modular construction; easy for mounting, support and calibration
- The needed output power for the current generator is twice less, compared with conventional Benches, because of the short cables and lack of Isolating CTs
- Meters with different constant can be tested on each test position
- Automatic reading of the meter registers with IR Head, according to IEC 62056-21
- Export of Test Results in Excel
- Statistics – up to 10 repeats, calculation of Average Error, Standard Deviation