The series of products with all sealed, maintenance-free, free hanging core, low noise, low loss of prominent features.

1. The iron core uses the steel belt and way overcomes the epoxy resin to match the clamp way, has reduced the leakage magnetic field the steel structure piece, thus reduced the product movement stray loss.

2. The coil part adopts the way that the voltage-adjusting line is separated from the main coil, which improves the mechanical strength of the coil, reduces the ampere-turn unbalance rate of the coil and improves the anti-short-circuit ability of the product.

3. Body insulation part of the pressure class using electrical laminating technology.

4. The tank is made of steel plate corrugated tank, reducing the weight, increasing the mechanical strength and heat dissipation.

5. Upper and lower fuel tank with wire structure, improved product sealing performance, while reducing the noise, to avoid leakage.