Product description
The photovoltaic isolation transformer uses low-loss materials and has high output conversion efficiency. The product has high load capacity, anti-interference, fireproof, moisture-proof, safe and reliable, energy saving and convenient maintenance. It has the function of isolating power supply in photoelectric conversion and can work normally in outdoor high temperature environment for a long time. Solar energy has attracted more and more attention because of its advantages of no pollution, no noise, and wide distribution. At present, most of the photovoltaic grid-connected power generation systems contain isolation transformers, and there is a problem of leakage current in the photovoltaic power generation system without isolation transformers.
Features
(1) Electrical isolation: The use of transformers to achieve electrical isolation between the photovoltaic power supply and the grid.
(2) Preventing the DC component of the current from being injected into the grid: Since the DC current does not cause a change in the magnetic flux, the DC component of the PV inverter system will not flow into the grid through the isolation transformer.
(3) Anti-interference effect: The isolation transformer with certain connection mode can eliminate the integer multiple harmonics of 3 times and 3, and reduce the influence of higher harmonics and voltage fluctuation on the power grid.
(4) The role of the stable voltage: When the system fails, the resonant overvoltage and the steady-state overvoltage of the photovoltaic inverter system can be effectively suppressed.
Photovoltaic isolation transformer technical parameters |
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Project | Standard value | Condition | |
1 | Capacity | 0.5KVA-2000KVA | |
2 | Voltage range | <1000V | |
3 | Insulation resistance | >100MΩ | DC1000V |
4 | Dielectric strength | <20mA | AC3.0KV 60S |
5 | Effectiveness | ≥98% | Full load |
6 | Noise | ≤65dB | 1m from the transformer |
7 | Temperature rise | ≤100K | Full load |
8 | Insulation class | H class(180℃) | |
9 | Connection method | Dyn11 | |
10 | Short circuit impedance | 4% | |
11 | Ambient temperature | -40℃~50℃ | |
12 | Design standards | GBT10228 |