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Helical Bundle Restraints

The Helical restraint is a preventative restraint designed to minimise bird caging.

Bird caging is caused by either gravity forces pulling on the conductor or as a result of a fault current.


Helical bundle restraints
Non Metallic Screened Cable (mm2)
Cat No. 11kV 22kV Qty
THHR35-50
35 & 50
-
TNHR70
70
35
TNHR95
95
50
TNHR120-150
120 & 150
-
TNHR185
185
-
TNHR120-150L
-
120 & 150
TNHR185L
-
185

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