Origin China Model Number S9 Brand Name HUYU Phase 3 Model Number : S9 series Payment & Shipping Terms: Minimum Order Quantity:2pcs Payment Terms:T/T, L/C Supply Ability:1,000pcs/month We can make all ranges oil immersed transformer (power distribution transformer) from 10KVA to 6300KVA. Features: 1) The inner structures of core and windings are the same with S9 off-circuit-tap changing transformer and have the same performance 2) The sealing structure could slow down the oil oxidation course in the transformer and extend its service life to 30 years 3) The corrugated structure of the oil tank leads to elegant outer appearance, compact volume, small dimension, and no core suspending on siteReferential atandard GB109431-1966 GB1094.2-1966GB1094.3-85 GB1094.5-85GB/T6451-1999 GB/T7595-1987GB/T10237-1988 GB/T3837-1988