Energy security and power quality have become critical issues for industrial business continuity. Recent events in Spain have heightened concerns across the sector.
A snapshot of the industry’s concerns
The blackout on April 28, 2025 left an impact that went far beyond the power outage itself: it demonstrated that a poorly managed voltage sag can bring factories, hospitals, transportation systems, and communications to a standstill within seconds, at an estimated cost of several billion euros. Since then, grid codes have required new facilities to ride through voltage sags without disconnecting, a requirement that is already affecting access to additional power capacity at hundreds of grid connection points.
This regulatory pressure is compounded by cost pressures. Spanish industry continues to pay significantly more for electricity than its European competitors, making any avoidable shutdown a doubly painful loss. At the same time, the growth of data centers is running up against an increasingly constrained grid, forcing these facilities to protect the quality of their power supply internally. End-of-line manufacturing plants in industrial parks are particularly exposed. In the healthcare sector, the same blackout brought into sharp focus something hospital infrastructure managers already knew: in an operating room or intensive care unit, a millisecond interruption is not a technical inconvenience—it is a direct risk to the patient’s life.
The common denominator across all these scenarios—manufacturing, healthcare, public administration, telecommunications, data centers, and others—is the same. Today’s production processes cannot afford a single loss of voltage, as these facilities operate 24 hours a day, 365 days a year, and are extremely sensitive to electrical disturbances.
DVR de alta potencia de ZGR Corporación. | EN ZGR Corporación High-Power DVR.
The DVR is emerging as the reference technology for industrial power protection
Against this backdrop, an increasing number of production managers, maintenance managers, and industrial installers are reassessing which technology can genuinely protect their critical processes. The trend is clear: the Dynamic Voltage Restorer (DVR) is becoming the reference solution compared with conventional battery-based UPS systems.
The reason is both technical and economic. A DVR detects a voltage sag and injects the exact missing voltage in series within milliseconds, so that the load does not even experience the disturbance, without batteries or other energy storage systems that degrade over time, require periodic maintenance, and limit the service life of the installation. The result is a more robust long-term technology, with efficiencies above 98%, capable of protecting high-power loads without the bottlenecks associated with battery-based solutions, which also require considerably more space than DVRs.
It is no coincidence that, according to studies by the Electric Power Research Institute (EPRI), power quality disturbances—particularly voltage sags—cost industry hundreds of billions of dollars worldwide every year, nor that investment in compensation technologies such as DVRs is growing alongside the increasing penetration of renewable energy, which adds variability to the grid, and increasingly stringent power quality regulations.
ZGR Corporación’s DVR range: robustness, flexibility and productivity
In this context, ZGR Corporación offers one of the market’s most robust, reliable, flexible, and productive DVR ranges, with two solutions covering the full spectrum of requirements for critical industrial applications:
- ZGR AVC DVR, designed to compensate for voltage sags and minor disturbances through continuous, high-precision voltage regulation, ensuring that the production process never experiences grid voltage variations.
- ZGR AVC DVR High Power, designed for more demanding installations and capable of mitigating three-phase voltage sags of up to 70% depth, with voltage stabilization within ±1% and no need for batteries, while complying with applicable regulations.
Both systems share the DNA that defines ZGR: maximum availability, the ability to adapt to any plant configuration, and a design intended for uninterrupted operation, delivering the highest possible return on the investment.
Market validation: global framework agreement with Schneider Electric
The strength of ZGR’s DVR range is not merely a claim made by the company itself. It is supported by ZGR’s role as a global supplier to Schneider Electric of this type of equipment—an alliance that has been strengthened through new international framework agreements and joint training programs in which Schneider Electric’s own technicians receive specialized training in the maintenance and commissioning of ZGR’s DVRs.
An agreement of this scale with one of the world’s leading power electronics manufacturers is, in itself, the strongest guarantee of reliability for any production manager, maintenance manager, or installer who needs peace of mind knowing that their installation will not come to a standstill.
In a world where the electrical grid is becoming increasingly variable and regulatory requirements increasingly stringent, protecting operational continuity is the foundation on which competitiveness is built.
Frequently asked questions
What is a DVR (Dynamic Voltage Restorer)?
It is a power electronics device that detects a voltage sag in the electrical grid and injects the exact missing voltage in series within milliseconds, so that the connected load does not experience the disturbance, without the need for batteries.
How does a DVR differ from an industrial UPS?
A DVR compensates for voltage sags by injecting energy in series from the grid itself, without relying on batteries that degrade over time and require periodic maintenance. This gives it a longer service life and higher availability in high-power applications.
What DVR range does ZGR Corporación offer?
ZGR Corporación manufactures two solutions: the ZGR AVC DVR, for voltage sags and minor disturbances, and the ZGR AVC DVR High Power, for more demanding installations, capable of mitigating three-phase voltage sags of up to 70% depth, with voltage stabilization within ±1%.
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