Section insulators of this type are used in the sections for separating different-phase power supplies or neutral sections of AC overhead contact lines (20000 to 25000 VAC). They are made of FRP. Their standard lengths are specified to be 6 m for the Shinkansen and 8 m for narrow-gauge lines on the basis of their arc-cutting performance.

Main specifications of the product shown in the photograph

Model	AC section insulator for different-phase sections	Remarks
Tensile withstand load	32.3kN (3300kgf)	Applicable 14.7kN (1500kgf)
	21.6kN (2200kgf)	Applicable 9.8kN (1000kgf)
Withstand voltage	AC100kV-5minutes
Leakage Current	1mA or less

 

Section insulators of this model are the most used for DC overhead contact lines (1500 VDC). Their insulators are made of FRP. The pantograph contact strips directly touch them while sliding.

Main specifications of the product shown in the photograph

Model	DC section insulator No. 2	Remarks
Tensile withstand load	33.0kN (3370kgf)	Applicable 14.7kN (1500kgf)
	22.0kN (2240kgf)	Applicable 9.8kN (1000kgf)
Insulation resistance	2000MΩ more
Withstand voltage	AC30kV-10minutes
Leakage Current	1mA or less

Section insulators of this model are used for DC overhead contact lines (1500 VDC) in sections where carbon contact strips are used. Their support slider made of metal and insulating material allows the pantograph contact strips to make almost no contact with the FRP insulators.

Main specifications of the product shown in the photograph

Model	DC section insulator No. 3 Quasi	Remarks
Tensile withstand load	33.0kN (3370kgf)	Applicable 14.7kN (1500kgf)
	22.0kN (2240kgf)	Applicable 9.8kN (1000kgf)
Insulation resistance	2000MΩ more
Withstand voltage	AC30kV-10minutes
Leakage Current	1mA or less