The utility model relates to a composite porcelain
bushing explosion-proof
current transformer, which comprises a high-
voltage shell, an explosion-proof
bushing, a base and a secondary
junction box, the secondary
junction box is arranged on the bottom surface of the base, the high-
voltage shell is connected and supported on a bottom plate at the upper end of the base through
metal flanges adhered to the two ends of the porcelain
bushing, a
glass fiber reinforced plastic inner bushing is lined in the porcelain bushing, and the explosion-proof bushing is arranged on the bottom plate.
Metal flanges are adhered to the two ends of the porcelain sleeve; the
glass fiber reinforced plastic inner sleeve is connected with the shielding supporting
pipe in a penetrating mode along the same center line, the shielding supporting
pipe extends into the high-
voltage shell and supports the secondary coil through the coil shielding cylinder, the shielding supporting
pipe is located on a bottom plate at the upper end of the base, a lead is arranged in the shielding supporting pipe, and the two ends of the lead are connected into the secondary coil and the secondary
junction box respectively. The shielding supporting pipe is made of hard aluminum
alloy, and the space between the shielding supporting pipe and the
glass fiber reinforced plastic inner sleeve is filled with insulating gas. The device is simple in structure, effectively guarantees the supporting of a high-voltage insulating part, is firm and stable in structure, can prevent the supporting sleeve from being damaged and leaked, and is safe to use.