Eliminating power quality issues created by dynamic loads in a hospital

Challenges in the customer’s hospital

In the Royal Victoria Hospital, loads were fed through two transformers with two separate busbars. In the imaging department, each busbar was feeding a number of MRI and imaging machines. The operation of these machines was creating major harmonic distortions. Both current and voltage harmonic distortions exceeded the prescribed limits. The synchronization of mains and standby generators and the burning of expensive electronic cards were challenging because of poor power quality.

The presence of harmonic distortions is a substantial threat to the stability of electrical systems. The mission-critical applications of hospitals require high availability and reliability, which was at risk in the presence of excessive harmonic distortions and distorted waveform.

Our Merus® Solution

Mission-critical applications require unfailing solutions to maximize the reliability and availability of electrical systems in hospitals to avoid any threat to human lives.

Merus Power’s factory-tested solutions meet the highest quality standards and provide excellent performance to guarantee the key requirements of reliability and availability. In this case, Merus® A-series Active Harmonic Filters were installed parallel to the loads. Merus® Active Harmonic Filters are configurable according to the customer’s specific requirements. Thanks to the modern touchscreen human-machine interface (HMI), the configuration is simple and just a few clicks away.

Results after installation

The fast response time of Merus® Active Harmonic Filters guarantee the availability and reliability of mission-critical operations in the Royal Victoria Hospital. Merus® Active Harmonic Filters have effectively mitigated excessive current and voltage harmonic distortions restoring the pure sinusoidal waveform.

The customer is now fully compliant with the G5/4 power quality standard. The synchronization of mains and standby generators was smooth without any further challenges. Reputation risk from unexpected equipment failure, loss of data, or nuisance tripping was significantly minimized.

Segment / Application

Commercial building — Hospital with MRI machines and other medical equipment


Northern Ireland, United Kingdom

Power quality issue

  • High current harmonic distortion
  • High voltage harmonic distortion

Merus® Solution

Customer Benefits

  • Smooth operation of mission-critical processes
  • Successful synchronization of mains and standby generators
  • Optimized operating costs
  • Eliminated harmonic current distortion

Do you have any questions?

Please contact one of our salespeople with questions and inquiries.

Markus Ovaskainen


Riku Kalliomaa

Head of Sales,
Regions & Channels

Jaakko Poutamo

Sales Manager,
Energy Storage, Europe

Mikko Zavertkin

Sales Manager,
Key Accounts & OEMs

Viktoria Mansikkala

Sales Manager,
Baltics & Eastern and Southern Europe

Juhani Jaatinen

Senior Sales Manager,
DACH, Benelux, France,

Venkatesh Ramachandra

Regional Sales Manager,
Middle East

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