Application：To adjust the wire tensile force at the tensioning place of overhead contact system.
Material：ZL114A、20#、Q235A
Technics：Low pressure casting with metal die
Performance：1.Max. working load is 1.1 times of connected conductor's rated tension.
2.Failure load: shall not less than 3 times of max. working load.
3.The transmission efficiency of tensioning device should be ≥97%
