The polymer housed MOA with disconnector for 10-35KV is equiped with the insulation base and bracker. The top bolt of disconnectror is directly connected with the bottom of MOA. The below is connected with gorund lead. Fig 7 shows the product's full assemblage.
 
The disconnector shall operator at the power frequency short circuit while MOA's failure under the abnormal conditions. As the dotted linen showed in Fig2, the grounding end of the disconnector should should has the rapidly operation characteristic, withand current impulse duty without working.