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CID-01023: Single Phase, Loop Feed, Open Point, Padmount Transformer, Structure

Super-Class:
  Primary Distribution Underground Deadfront Padmount Transformer Structure
  Loop Feeder
Class Name: Single Phase, Loop Feed, Open Point, Padmount Transformer, Structure
Sub-Classes:
Single Phase Low Profile Padmount Distribution Transformer
 
Bushing Insert, 200A, Loadbreak
 
Underground Cable Fault Indicator
 
Feed-Thru, Parking Bushing, 200A, Loadbreak
 
Arrester, Elbow, 200A
 
Split Bolt, Copper
 
Clamp, Ground Rod
 
Padlock
 
Wire, Stranded, Copper, Soft Drawn
 
Summary: Single Phase, Loop Feed, Open Point, Padmount Transformer, Structure

Summary

If a transformer is to be used as a "Normal Open" point in a looped (alternate feed) system, both cables must be protected from overvoltage with elbow-type arresters.

A feed-thru bushing is to be installed in a parking stand of the transformer. The cable supplying the transformer is placed on the H1A (lower) bushing, with its corresponding elbow-type arresters placed on the H1B (upper) bushing. The open ended cable is placed on the right side of the feed-thru bushing, with its corresponding elbow type arrester placed on the left side of the feed-thru. The primary cable neutrals are then crimped to the transformer ground. The arrester ground leads are also connected to the transformer ground.

Pictures

cable01.JPG

Drawings

References

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