Power Circuit Breakers

for safety and protection


440V Power Factor Correction

Modular Trays

UK Customers Only

In line with our ongoing commitment to provide the market with practical product solutions and offer great value, high quality and reliability, we are pleased to advise that we have invested in stockholding of a range of 440V modular trays available for immediate delivery to complement our popular 400V products.

440V Modular Trays

  • Perfect for 400v, 415v and 440v supply systems
  • Physical dimensions are the same for 440v as for 400v
  • For convenience, our pricelist includes the different kVAR ratings for each voltage supply application (see download attached)
  • Detuned options also available from stock
440V Modular Trays 440V Modular Trays

View Prices for 440V Modular Trays

For further details, please contact your local Terasaki representative as below or our dedicated Sales and Applications email.

Regional representatives: -

Scotland & N. Ireland Gary Connelly Gary.Connelly@terasaki.co.uk 07785 577 318
Northwest Norris Lawton Norris.Lawton@terasaki.co.uk 07801 188 230
Northeast Keith Gray Keith.Gray@terasaki.co.uk 07932 057 221
Midlands Gareth Rowlands Gareth.Rowlands@terasaki.co.uk 07770 284 591
Southwest & South Wales Matt White Matt.White@terasaki.co.uk 07973 730 203
London & Southeast Nigel Richardson Nigel.Richardson@terasaki.co.uk 07768 541 392
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Video Interview - Terasaki

David Wales on Dynamic Discussions with ACDC Dynamics

Export area manager, David Wales, recently appeared on Dynamic Discussions, a video interview series developed by Terasaki's South African partner ACDC Dynamics.

In this video interview, which you can view below, David discusses the history of Terasaki and explains why our products are elite in the field of circuit protection.

Perhaps you have some questions about Terasaki and our products that David was not asked in the video. You can ask David anything here:

Ask David

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Who Else Wants to Reduce Electrical System Downtime in Hospitals?

NHP, Terasaki's partner in Australia, has recently released a case study featuring Terasaki AR ACBs. You can view the video below:

The power distribution infrastructure at Monash Medical Centre in Melbourne was end of life and needed to be replaced. NHP met with the hospital to understand their requirements and recommended a SMART closed transition switch solution made possible by the Terasaki ACB, which guarantees a seamless transition from mains power to generator. This has reduced the need for months of planning for when the hospital undertakes mandatory quarterly testing of its generators, all the while keeping patient safety at the forefront.

Please visit the project references section on our website for more examples of case studies/projects where our TemPower 2 ACBs have been applied.

View Terasaki Project References

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TemPower 2 ACB - Auto Racker and Remote Controller

Have you heard about our new TemPower 2 ACB auto racker and remote controller?

Subscribe to our updates via the link below and you'll automatically receive an email with the brochure attached and a link to the full auto racker video:

Subscribe for updates on TemPower2 Auto Racker and Remote Controller

If you are interested or would like more information on this product, please do not hesitate to email us.

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Air Circuit Breakers with - Intrinsic Reliability

Quality is in everything we do.

From the design office to the factory floor, quality is part of the ethos by which we all operate at Terasaki.

Quality overarches design for manufacture, design for maintainability, manufacture for reliability and results in long and trouble-free product life for our customers.

It’s in our corporate DNA.

Take, for example, our TemPower 2 ACB range. Elegant design includes unique features such as: -

  • Our "Double Break" contact system ensures extremely fast interruption of short circuit currents. Energy is dissipated at two points on each pole within the breaker resulting in minimised erosion of the contacts and increasing the reliability of the breaker.
  • Our proprietary active sensor system continually monitors temperature of the conductors at the contacts and can signal an overheating alarm before irreversible damage occurs.
  • Uniquely, TemPower 2 ACBs have their isolating clusters and racking mechanism on the ACB body rather than the chassis. Having all the maintenance touch points on the body side allows shorter time to repair (MTTR) and minimal downtime.

But don’t just take our word for it, download the pdf to reveal more detail of these innovative features. Take a look at the testimonials of our customers in critical applications, harsh environments and remote installations.

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Prevent Arc Flash with Safe Distance Devices

Direct operation of switchgear is one of the most frequent exercises that exposes an operator to risk.

Safe Distancing

Remote switching permits operation of the circuit breaker at a safe distance. Circuit breakers can be opened and closed from a remote location, removing the operator from the area of risk, and allowing a reduction in the level of personal protective equipment (PPE) required for the operation.

Using the Terasaki ACB remote controller provides a safer operating environment for personnel through the proven method of adding distance between the operator and the risk.

ACB remote controller

ACB remote controller:

  • Lead length: 10m, 15m or others on request
  • Plugs into socket on ACB front cover
ACB Remote Controller ACB Front Cover ACB

ACB Remote Controller

Plug the controller into the socket on the ACB

Switch on the ACB from a safe distance.

Please contact us if you require more information

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Exhibitions 2020 – Come Visit Our Stands

You will be able to see Terasaki exhibiting at the following events in 2020:

  • Middle East Electricity
  • Tue 3rd – Thu 5th March 2020
  • World Trade Center, Dubai
  • Stand H2.F20 – BEAMA Pavilion
  • Data Centre World
  • Wed 11th – Fri 13th March 2020
  • ExCel London
  • Stand D372
  • Hannover Messe
  • Mon 20th – Fri 24th April 2020
  • Hannover, Germany
  • Hall 12, Stand B73

Please contact us if you require more information

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How 800V AC on Large Solar Farms Reduces Cost

You can significantly reduce the cost of equipment for large solar farms by spending less on cable. Developers want to achieve this by transmitting power at higher voltages. Lower currents will be carried to the “collector” switchgear by cable with smaller cross-sectional area and lower cost. The trend is to transmit at 800V AC.

Terasaki support this opportunity for developers to reduce cost. We’ve type-tested a new range of circuit breakers for 800V AC. The VE400-NE MCCB and AR3H-V8 ACB handle fault currents up to 30kA at 800V AC. Current ratings from 100A to 3200A.

Download the Data Sheet
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We have listened to you: new GroupStak developments

Download our leaflets for GroupStak

Following the recent successful roadshow we have taken on board customer feedback and have developed the GroupStak to include the following features:

Form 3b solution.

The GroupStak switchboard is now developed to include a form 3b option. This offers a higher stacking density at lower price than the standard form 4b version. Maximum number of feeders of different types are listed below:

  • 56 - single pole MCCBs, max 125A
  • 21 - 3 pole MCCBs, max 160A
  • 17 - 3 pole MCCBs, max 250A
  • 12 - 3 pole MCCBs, max 400/630A

Electronic feeders

GroupStak is now design verified with outgoing MCCBs with electronic protection.

TemBreak 2 MCCBs from 250A frame to 630A frame are available with electronic protection units. Current ratings, In, of 40A, 125A, 160A, 250A, 400A, 630A are available. These offer flexibility as their characteristics can be set between 0.4 and 0.1 times In.

Every TemBreak 2 electronic protection unit includes overload protection (L), delayed short-circuit protection (S) and instantenious protecion (I) as standard. Metering and CTs

Metering and CTs

GroupStak has now been developed to accept Rayleigh’s Easywire plug and play meters and CT's.

The steel work is pre-drilled for ease of mounting with pre-cut clear cover plates and door cuts-outs on request.

Spare ways

Many specifications request provision for future additions (spare ways). GroupStak can have spare ways included without MCCBs fitted. They have pre-coppered to the main bus bar making it a quick and easy job to add future MCCB outgoing devices.

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We hear you!

We have asked registered users for their feedback on the TemCurve Lite software. Some people complained that it was difficult to download.

We have removed the registration form from TemCurve Lite download. You may now download it without registration.

Overall we received positive feedback with some good suggestions which we will take in to account.

For those of you who would like to receive Terasaki updates we have added a registration form on our news page. Subscribe and be the first to receive our news.

Subscribe to our mailshots
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How to Select and Set Circuit Breakers for Generators

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" Paper
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Terasaki welcome customers in our factory!

What is the best way to choose a supplier? Go and see them yourself!

Terasaki is always happy to welcome customers:

  • we will show our factory,
  • do a presentation of our products,
  • you will meet Terasaki personnel and see yourself what we do to guarantee high quality products and fast service.

Terasaki Presentation Terasaki Electrical Testing Area

Product Presentation by Terasaki

Testing process viewing by Terasaki visitors

We will also make sure that you enjoy your visit to Glasgow:

  • we will prepare a suitable sightseeing program for you:
  • a trip to Edinburgh,
  • visiting most spectacular Glasgow places or seeing Scotland's second famous manufacturing (after Terasaki): Scotch Whisky.
  • Our colleagues will accompany you as well (if you wish to of course).

Drummer in Edinburgh by This Is Edinburgh Kelvingrove Art Gallery Glasgow

Drummer by "This is Edinburgh"

Kelvingrove Art Gallery by "People Make Glasgow"

To arrange a visit to Terasaki Glasgow factory.

Contact Us
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