Dry-Type Photovoltaic Isolation Transformer for Solar PV Systems

SG series dry-type photovoltaic isolation transformer from 1kVA to 3000kVA provides galvanic isolation between PV systems and the grid, blocking third harmonics and voltage spikes. Designed with high-quality silicon steel core and vacuum pressure impregnation (VPI) for F or H class insulation. Suitable for residential to industrial solar installations with customizable input/output voltages, connection groups, and tap positions for seamless PV system integration.

Key Features

• Wide capacity range — 1kVA to 3000kVA covering residential rooftop to large-scale industrial PV installations
• Electrical isolation and harmonic blocking — Delta-wye configuration traps third-harmonic currents on the primary side, preventing them from entering PV equipment; galvanic isolation protects against voltage spikes
• High efficiency — Advanced silicon steel core material and optimized winding design minimize no-load and load losses for maximized PV energy conversion
• Robust build quality — Vacuum pressure impregnation (VPI) process with F class (155°C) or H class (180°C) insulation; premium silicon steel laminations for excellent heat dissipation and long service life
• Fully customizable — Input/output voltage, connection group, tap position, winding distribution, secondary configuration, and enclosure options all tailored to project specifications

Technical data

Product Operating Conditions

• Applicable altitude: ≤5000m
• Ambient temperature: -15℃ ～ +45℃
• Relative humidity: ≤90%