Medium and High Voltage (MV/HV) Power Distribution

By: Delta Electrics  09-Dec-2011
Keywords: Circuit Breakers, Power Distribution, Surge Arrestors

Delta Electrics are experienced across a wide range of technologies and components in Medium and High Voltage applications including switchgear, power transmission equipment, protection relays, circuit breakers, surge arrestors, insulators, monitoring systems, sub-stations and control systems.

Delta Electrics was appointed by Siemens Energy PTD in 2004 as their sole agents for the Northern Territory. Siemens are world leaders in the design and manufacture of medium and high voltage power distribution equipment. They manufacture an extensive range of Medium and High Voltage equipment.

Medium Voltage (MV) Range

The Siemens medium voltage range includes air insulated switchgear systems for primary distribution and motor control applications, gas insulated switchgear systems for all primary and secondary applications, and medium voltage components for indoor and outdoor applications, up to 33kV. The Siemens range of MV products includes:

  • Air Insulated Switchboards
  • Gas Insulated Switchboards (GIS)
  • Ring Main Units (RMU)
  • Surge Arrestors
  • Circuit Breakers

High Voltage (HV) Range

Reliable high voltage equipment is paramount for ensuring system availability. Reliability, flexibility
and quality are key attributes of the Siemens high voltage range. Siemens experience in high
voltage technology spans decades, with the design and production of their products setting
international standards.

The use of common parts and assembled units in a variety of Siemens breakers such as live-tank,
dead-tank, and gas insulated switchgear, means the production of the same main components in
large quantities. Steady and regular quantities of produced units allow a continuous production
process, and are subject to the highest quality standards.

The Siemens range of high voltage products includes:

  • Gas Insulated Switchgear (GIS) - 72.5kV up to 800kV, for both indoor and outdoor applications. Its compact design allows their use in the most confined spaces, whether in the basement of a high-rise building, or in a department store, industrial plant or mobile container.
  • Circuit Breakers - 72.5kV up to 550kV, available in both Live Tank and Dead Tank configurations. These high voltage circuit breakers offer the optimum technical and economical solution for every requirement.
  • Surge Arresters - Porcelain, polymer and GIS arresters up to 800kV. Siemens modern Metal Oxide Surge Arresters offer complete protection against over-voltages. In addition, they offer a failure rate of almost 0% and a lifetime of more than 20 years.
  • Disconnectors - 72.5kV up to 550kV, available in a variety of designs for dis-connectors and earth switches, including double break, centre break and pantograph configurations. Quick to install, with extended maintenance periods, they offer the optimal economical solution.
  • Instrument Transformers - This technology comprises paper/oil insulated and SF6 insulated current and voltage transformers, combined transformers and capacitor voltage transformers from 72.5kV up to 800kV. Siemens SF6 gas insulation and composite insulator technology offers "explosion proof" features as well as reduced washing requirements and excellent performance under polluted conditions.

Past projects

Delta Electrics has extensive experience in the design, installation and maintenance of power  distribution systems for Medium and High Voltage applications. We have completed numerous projects for major companies and organisations operating in the Northern Territory such as:

  • Power and Water Corporation
  • Commercial Builders and Developers
  • NT Department of Health
  • Australian Department of Defence

Keywords: Circuit Breakers, Power Distribution, Surge Arrestors

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