Photovoltaic Step-up Box Transformer

● Basic composition of the YB-12 type Photovoltaic Step-up Box Transformer

Photovoltaic step-up box transformer is usually integrated in a box by the following three parts: ◆Photovoltaic inverter (optional part): Convert the direct current (DC) output by photovoltaic modules into alternating current (AC), and the common output voltages are 270V, 315V, 400V, etc. Step-up ◆Transformer: Boost the low-voltage alternating current output by the inverter to the voltage level required by the power grid (such as 10kV and 35kV).

◆High voltage switchgear: Including circuit breakers, disconnectors, protective devices, etc., used for grid-connected control and system protection. Note: Some box transformers may not include inverters, but only boost transformers and high-voltage switches (called "pure boost box transformers").

● Core functions of Photovoltaic Step-up Box Transformer

◆Voltage boost: meet the requirements of power grid for grid-connected voltage.

◆Electric energy isolation: the photovoltaic system is electrically isolated from the power grid through the transformer.

◆Protection function: over-current, over-voltage, short circuit, island protection, etc.

◆Monitoring and control: Support remote monitoring and collect data such as voltage, current and power in real time.

● Photovoltaic Step-up Box Transformer technical characteristics

◆Efficient heat dissipation: ventilation or forced heat dissipation (such as fans and air conditioners) should be considered in the box design to avoid high temperature affecting the service life of the equipment.

◆Protection grade: usually IP54 or higher, dust-proof, moisture-proof and salt fog-proof (suitable for coastal or high-altitude areas).

◆Low-loss transformer: amorphous alloy or energy-saving silicon steel sheet is used to reduce no-load loss.

◆Intelligent grid connection: Support functions such as reactive power compensation (SVG) and harmonic suppression, and conform to power grid specifications.

● Technical parameters

Rated voltage levels: 35KV and 10KV and below;  Frequency: 50;  Insulation level (see table below).