High Voltage

With great power comes great responsibility. Servicing the market with our unique skillset, Shepherd proudly provides competitive, privately-owned high voltage solutions and critical site upgrades across the region. Hauling, terminating and testing in-house, we’re equipped with a comprehensive tool and asset inventory to complete bespoke works.

Design

Complete design services including HV cable ratings and thermal modelling 

Earthing studies 

Fault studies 

Protection reports 

Substation and switching stations

Build

Switchgear assembly 

HV cable terminations 

High voltage switching 

Overhead line work 

In-ground cable networks 

Earthing systems 

Transformer installations 

Padmount, kiosk and chamber sub-installations and fit-outs 

Cable jointing

Commission

VLF cable testing

Withstand testing up to 145kV

Switchboard commissioning

Substation earth testing

Cable Tan Delta testing

Transformer Tan Delta testing

Primary and secondary injection testing

Earth potential rise verifications

Soil resistivity testing

Utility interface

Hipot

Maintain

HV Customer Nominated Electrical Operating Authority (EOA)

HV switching

Transformer oil testing

Switchgear maintenance

Circuit breaker maintenance

Temporary transformer hire

Cable Tan Delta testing

Transformer testing