■ inductive, capacitive, resistive load power can be any combination of resistive 0.001kW ~ maximum power adjustable, sensual 0.001kW ~ maximum power adjustable,
Capacitive 0.001kW ~ maximum power adjustable. Satisfies the three-phase voltage unbalance conditions accurately adjust the exchange resonance.
■ Performance parameters according to testing requirements, by operating the panel, any combination, set discharge power.
■ analog AC electrical equipment resonance occurs, effective and accurate detection and anti-islanding inverter protection.
■ detection of various inverter efficiency at full load to run the maximum output power and load capacity.
■ simulate the complex work environment, detection inverter integrated in a variety of environments job performance status.
■ You can collect data (to be equipped with data acquisition card), automatically find resonance.
■ For 3φ4W, 380V 50HZ and 3φ4W, 480V 60HZ two different specifications of the inverter output, can easily debug the exact resonance point occurs,
Meet anti-islanding test, which was part of China's first. Resonance test: Set Power = capacitive inductive power, in theory, resonant inductive capacitive
Reactive power cancel each other out, reactive power = 0.
■ minimum resolution resistive load, inductive load and capacitive load of 1W, can accurately simulate the exchange occurred and the resonant inverter to meet the testing needs debugging.
■ measurement data can be uploaded to the PC, and the implementation process of the detection process of recording process data storage capabilities.
■ A panel operation or remote control two modes of operation.
■ with over-temperature protection.
■ adopt new resistor components, high power density, no red heat phenomenon, the whole by the resistive load, inductive load and capacitive load of three parts.
■ applied to the grid inverter factory inspection, commissioning, research and development, laboratory electrical characteristics test, authorities identified the areas of testing.
■ applied to use the units and grid-inverter product acceptance and routine maintenance inspection, comprehensive scientific testing of various inverter power supply capacity, and accurate
■ use 800 × 480 pixel LCD color display.
Anti-islanding test waveforms:
Reference Preparation of technical standards:
■ UL 1741: 1999 "independent power systems with inverters, converters, controllers"
■ IEC 61727: 2004 "PV system supply mechanism interface requirements"
■ IEEE 929: 2000 "Recommended Practice for photovoltaic systems powered interface"
■ AS 4777.2: 2005 "via the inverter power supply system and network Part II: Inverter requirements"
■ IEEE 1547: 2003 "distributed power and power system interconnection standards."
■ IEEE 1547.1: 2005 "interface devices, distributed power and power system test procedures."
■ IEC62116 "PV grid system with anti-islanding inverter testing methods" developed this certification
Normal mode interface:
Anti-islanding test methods: