§ QualityDRG SYN-400
Tested tolet go.
A helix that never slips takes the cable with it. So the GR asks every fitting to hold its rating — and then to give way in a controlled, repeatable manner. Fourteen tests, the way the standard writes them.
Channel 07 Recording
Galloping / fatigue
A complete tension set and suspension set on a 100 m span, driven at anti-nodal amplitude of a full cable diameter.
Acceptance10 M cycles, 30–100 Hz
§ The rigs
A hundred metres of span, indoors.
Galloping at a full cable diameter, aeolian vibration at half of one, ten million cycles each — on a complete tension set and suspension set, with attenuation measured on every fibre afterwards.
§ Standards invoked
TEC GR/TX/OAF-001/03
Installation accessories for aerial OFC
IEEE 1222
Galloping and aeolian vibration test method
IEC 60794-1-2-E1
Tensile performance of the fitting on cable
NF EN 50483-6
Climatic ageing and corrosion, wedge type
IS 2629
Hot-dip galvanising practice
IS 2633
Uniformity of the galvanised coating
IS 617
Aluminium alloy for die castings
IS 6061
Aluminium alloy wire for formed helix
IS 2062 / IS 2004
Structural and forged steel
IS 3400 Pt 10
Compression set of the elastomer
IS 2102
General dimensional tolerances
ISO 9001
Quality management system
ISO 9001 certificate
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TEC type approval
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BSNL vendor registration
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