Power Circuit Breakers

for safety and protection

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Overheating Protection

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TECHNICAL ARTICLES

1.

Condition Monitoring in Low Voltage Circuit Breaker Technology

Overheating is the single biggest cause of failure in switchgear. Modern circuit protection is provided by digital overcurrent relays which are operated by current, not heat so abnormal heating caused by loose connection bolts, ventilation failure or worn contacts is usually left undetected by conventional circuit breakers. This can lead to pre-mature failure of switchgear and also constitutes a potential fire hazard. Thermal imaging can help prevent this but is only valid for that ‘snapshot’ in time. Continuous condition monitoring of the temperature of switchgear can substantially minimise down time of the installation and reduce the risk of fire.

Condition Monitoring in Low Voltage Circuit Breaker Technology
2.

Why the Protection of Generators Needs Special Consideration

Generators differ from other electrical power sources in their ability to withstand electrical overloads and fault currents. These differences should be respected when selecting and setting circuit breakers which protect generators. Terasaki have prepared a designed guide that explains the parameters of generators and circuit breakers which should be considered when selecting and setting circuit breakers which protect generators.

Download Why the Protection of Generators Needs Special Consideration
3.

Circuit Breaker Selection was affected by "Seventeenth Edition" Amendment from the First of July 2015

A new compensation factor, Cmin, has been included in the UK regulation for protection from electric shock. Terasaki has produced a technical guide on this factor, explaining common reasons an elecrical design may not meet the "Requirements for Electrical Installations" IET Wiring Regulations Seventeenth Edition. BS7671:2008 and the solutions offered by Terasaki.

Download Circuit Breaker Selection was affected by "Seventeenth Edition"
4.

Double Neutral Application Notes

An article about the world’s only ACB with 12,000A neutral - Terasaki TemPower 2 ACBs with double neutral. Including technical specifications.

Download Double Neutral Application Notes Paper
5.

Double Opening and Double Closing Coils

An article in PDF about Terasaki ACBs’ double breaking and opening coils. These may be used in datacentres and UPS to increase the reliability of the entire electrical system.

Download Double Opening and Double Closing Coils
6.

How To Choose a Circuit Breaker

A helpful guide in PDF format on how to choose the correct circuit breaker for a certain project: Air Circuit Breaker or Moulded Case Circuit Breaker. This article can be used for publishing in your local magazines or provided to specifiers.

Download How To Choose a Circuit Breaker
7.

Retrofitting of Low Voltage ACBs New for Old

Read more about retrofitting ACBs in an article about Retrofitting a modern low voltage air circuit breaker being cost and time effective solution to this growing dilemma.

Download Retrofitting of Low Voltage ACBs New for Old
8.

Safe Switchgear Specifications Paper

This paper will update the professional electrical engineer on the safe application of low voltage MCCB technology and will examine thoroughly protection disciplines, isolation principles and future trends for MCCBs.

Download Safe Switchgear Specifications Paper
9.

The Application of Circuit Breakers to Reduce Downtime in Datacentres

This paper will describe circuit breaker selection methods and available circuit breaker technology which can contribute to reduced downtime in datacentres. It is divided into issues related to topology (or system layout) and sustainability (performance over time).

Download The Application of Circuit Breakers to Reduce Downtime in Datacentres

PROJECT CASE STUDIES

Amrun Mine Project

Implementing Circuit Breakers at Amrun Mine

Download Amrun Mine Project Case Study.
Jimblebar Mine

Remote ACB Switching at Jimblebar Mine

Download the Jimblebar Mine Case Study.
Supertram Electrical Upgrade

1000V DC Circuit Breaker for Supertram

Download the Supertram Electrical Upgrade Case Study.
Sainsbury Shop Front

Sainsburys: Headquarters at Holburn, London

Download the Sainsburys Headquarters Case Study.
Bank of Canada Circuits

Royal Bank of Canada, London: Retrofit

Download the Royal Bank of Canada Retrofit Case Study.
Torness Nuclear Power Station

EDF Energy: Torness Nuclear Power Station, UK

Download the Torness Nuclear Power Station Case Study.
BHP Billiton Facility

BHP Billiton: Mining Industry

Download the BHP Billiton Case Study.
Neves-Corvo Mine

Lundin Mining: Neves-Corvo Mine

Download the Neves-Corvo Mine Case Study.
Credit Suisse Retrofit

Credit Suisse, London: Retrofit

Download the Credit Suisse Retrofit Case Study.
Standard Life Logo

Standard Life Data Centre, Edinburgh: Retrofit

Download the Standard Life Retrofit Case Study.
Terasaki Circuits

The Rosebery Group Data Centre, UK: Overheating Protection

Download the The Rosebery Group Overheating Protection Case Study.
Chelyabinsk Pipe-Rolling Plant

Chelyabinsk Pipe-Rolling Plant (ChelPipe), Russia: Pipe Workshop

Download the Chelyabinsk Pipe-Rolling Plant Case Study.

Commonwealth Arena and Sir Chris Hoy Velodrome

Download the "Commonwealth Arena and Sir Chris Hoy Velodrome" Case Study.

BAA Airports Limited: Heathrow Airport Terminal 5

Download the Heathrow Airport Case Study.
Ringhals Nuclear Power Station

Vattenfall: Ringhals Nuclear Power Station

Download the Ringhals Nuclear Power Station Case Study.
Rolling Mill Steel Factory

SSAB: Rolling Mill Steel Factory in Sweden

Download the Rolling Mill Steel Factory Case Study.
Telehouse Data Centre

Telehouse U.K.: Telehouse Data Centre

Download the Telehouse Data Centre Case Study.
Volvo Foundry

Volvo Sweden: Volvo Foundry at Skövde

Download the Volvo Foundry Case Study.
Whitelee Wind Farm

Scottish Power: Whitelee Windfarm, UK

Download the Whitelee Wind Farm Case Study.
RBS Bishopsgate

Royal Bank of Scotland, London: Retrofit

Download the Royal Bank of Scotland Retrofit Case Study.