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Hv 3 Pole connectors, correlation of break down, voids & dimple/indents

Hv 3 Pole connectors, correlation of break down, voids & dimple/indents. Ian Crotty 13 Nov 2012. Four categories of connectors tested to 15kV. New Delivery assembled ( Imtiaz ) connectors x10 Mrs W ang break down connectors x11 Old (RB) connectors x6 (tested for 8 days)

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Hv 3 Pole connectors, correlation of break down, voids & dimple/indents

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  1. Hv 3 Pole connectors, correlation of break down, voids & dimple/indents Ian Crotty 13 Nov 2012

  2. Four categories of connectors tested to 15kV • New Delivery assembled (Imtiaz) connectors x10 • MrsWang break down connectors x11 • Old (RB) connectors x6 (tested for 8 days) • New delivery unmade connectors( not tested) x11

  3. External indents or dimples • Voids and “non-dimples” correlate very well. Dimple

  4. Conclusion • With 15/27 cases the correlation of break down and voids is not conclusive. • The break down may be due to voids but there seems to be in addition another source of beak down. • Voids may be identified by simple observation • The voids will, at least, compromise the HV integrity over time. • Voids are in almost all connectors

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