Abstract: A transportable power supply substation is a power supplying equipment in which electric power machines are mounted on transporting apparatus. The transportable power supply substation in accordance with the present invention including transporting means and electric power distributing means which includes a transformer a current interrupting unit and so on, and the current interrupting unit is rotatably supported by supporting means which comprises a supporting shaft a bearing member and rollers. The current interrupting unit is therefore, rotatable as occasion demands, and is also secured to the transporting means by means of securing means.

Abstract: The herein-disclosed electrical insulating paper is well-suited to the insulation of extra-and ultra-high-voltage oil-filled electric power cable, and comprises at least one layer (A) which is a mixture of polypropylene fibers and kraft pulp and at least one layer (B) of accumulated polypropylene fibers laminated to the layer (A) by fiber-to-fiber bonding of the polypropylene fibers. The electrical insulating paper is prepared by superposing at least one layer of a mixed paper of polypropylene fibers and kraft pulp and at least one layer of polypropylene web, and heating the superposed layers at a temperature of 110.degree. to 180.degree. C to thermally laminate the layers each other.

Abstract: The invention provides a curable composition of polychloroprene, chlorinated polyethylene or polyepichlorohydrin containing at least one metal oxide having an oxidation state of 2 to 5 valences as a curing agent and at least one accelerator of the formulaA--(S).sub.n --A'wherein S is a sulfur atom, A and A' are polyhydroxy aryl groups having 6 to 18 ring carbon atoms and n is zero or an integer of 1 to 4. The accelerators enable a satisfactory rate and state of cure with the metal oxide.

Abstract: Polyolefin fibers containing at least 70% by weight of polypropylene fibers having a denier of at least 0.5 and a birefringence of at least 2.5 .times. 10.sup.-.sup.2 are formed into a sheet. The sheet is then frictionally calendered in the dry state at a frictional ratio of at least 15% and at a temperature in the range from 90.degree.C to 160.degree.C whereby an insulating paper having excellent air-impermeability and oil-resistance is obtained.