1- Install the busbar between the bushing of 
the 1st switchgear’s disconnector and the 2nd 
switchgear’s disconnector. Place the ball on the 
busbar in the 1st row switchgear and tighten the 
separator isolator busbar bolt with the torque 
wrench from the sphere (with 50Nm force). 
Apply the above procedures separately for three 
phases respectively.
2- Insert busbars and spheres between separator 
insulators of second switchgear and separator 
insulators of third switchgear and tighten the 
separator insulator busbar bolts through the 
sphere with a torque wrench.
Installation of Main Busbar
A A
Stress Control Cone
A-A view A-A view
Busbar 1
Busbar 1
Busbar 1
Busbar 2
Busbar 2
Busbar 1
Busbar 2
Busbar 2
630A Busbar installation 1250A Busbar installation
Stress Control Cone
Stress Control Cone
Stress Control Cone
6  Ulusoy HMH36 Metal Enclosed Modular Switchgear User Manual   June 2020 www.eaton.com