How Uninterruptible Power Supply Supplier Zigor Protected Production Plant from Emergency Stops

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Zigor - a global provider of uninterruptible power supplies - has announced details of how it protected a major production plant in Spain against emergency stops due to voltage dips.

Zigor is a global UPS manufacturer

To help supply all of Air Products Group’s power needs, Zigor equipped the plant with a medium voltage transformer

Global uninterruptible power supply supplier Zigor is delighted to announce details of how it met the power requirements of a hydrogen production plant in Catalonia, Spain.

The factory, owned by Air Products Group – a worldwide supplier of industrial gases and equipment – supplies one of the most important oil refineries in Spain with hydrogen 365 days of the year.

The plant, based in Tarragona, is directly powered by a transport line but they were still suffering voltage dips of up to 50 per cent due to the heavy-duty motors at the refinery as well as occasional summer storms.

The motors work at medium voltage (6.6 kV) and their systems are sensitive to sags when the voltage drops below 12-15 per cent and are stopped for security reasons as hydrogen is highly explosive. The supply of hydrogen to the refinery would also be stopped causing high downtime financial losses as it takes three full days to restart the entire refining process.

To help solve this problem and supply all of Air Products Group’s power needs, Zigor equipped the plant, which has two feeders, with a medium voltage transformer of 2.1 MW 6.6 kV and included medium voltage motors at 6.6 kV to protect the hydrogen generation process.

Zigor also installed a medium voltage SET DVR of 2.4 MW nominal power which provide a stable voltage of 6.6kV (± 1%) even if voltage dips drop the 40 per cent of nominal voltage value. Now Zigor’s DVR continuously protects the whole plant (excluding non-critical services) for the production process against emergency stops due to voltage dips.


Zigor is a global uninterruptible power supply manufacturer and producer of renewable energy solutions.

The company was founded in the United Kingdom in 2008 and its headquarters and distribution centre are located in Northamptonshire.

Zigor provide tailored solutions for retailers, distributors and end-users for a wide range of applications including SME’s, large commercial organisations, data centres, industrial facilities and public and education sectors.

Their headquarters is based in Spain with offices in Mexico, USA, Colombia, Brazil, Chile, Argentina, Hong Kong, Portugal and New Zealand.

Zigor’s range starts at 650va plug ’n’ play UPS for domestic and home office use extending up to 400kva three-phase UPS for larger data centre and industrial applications.


Zigor UK
3 Heath Square
Boltro Road
Haywards Heath
West Sussex
RH16 1BD
Tel: 0844 854 6264
Email: salesuk(at)zigor(dot)com

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Steve Skerry
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