Newfoundland and Labrador’s power grid relies on the Labrador-Island Link to transport electricity from Muskrat Falls to the Soldiers Pond Terminal Station. Recent infrastructure testing and system trips have highlighted the sensitivity of this link, which can lead to widespread, short-term power outages for customers across the island when the system experiences technical disruptions.
How does the Labrador-Island Link impact grid reliability?
The Labrador-Island Link is designed to carry power from Muskrat Falls to the Soldiers Pond Terminal Station. According to Newfoundland and Labrador Hydro, the system is currently undergoing high-power testing to reach its designed 900-megawatt capacity. While previous tests at 475 and 700 megawatts were successful, pushing the system to its limit carries the risk of customer impact.
When the system experiences a “trip”—an automatic shutdown to protect equipment—the grid may trigger an underfrequency load shed. As reported by Newfoundland and Labrador Hydro, this process automatically drops power to specific blocks of customers to quickly balance the system. In one recent event, this mechanism resulted in electricity losses for roughly 73,000 customers.
If a power outage occurs during these high-power tests, Newfoundland and Labrador Hydro indicates that the interruption is typically expected to last less than 30 minutes.
What happens when a system trip occurs?
A system trip on the Labrador-Island Link creates an immediate ripple effect for Newfoundland Power customers. When the link fails to transmit the expected load, the grid’s automated response is designed to prevent a larger blackout by shedding load. This happened as recently as February 2026, when a trip on the transmission line caused interruptions in several areas on the island.
Following such events, restoration efforts are prioritized. For example, during the February incident, utility providers worked to bring customers back online after the automated shedding occurred. While these events are disruptive, they are part of the process of commissioning the link to its full designed capacity.
Proactive steps for residents during testing
Newfoundland and Labrador Hydro has noted that while they take every precaution, there is always a possibility of customer impact during high-power testing. If you live in an area serviced by the grid, keep these tips in mind:
- Monitor official channels: Newfoundland and Labrador Hydro issues news releases ahead of planned high-power testing, which typically occurs on Tuesday and Thursday mornings.
- Prepare for short outages: Since even successful tests can result in brief interruptions, ensure sensitive electronics are protected by surge protectors.
- Stay informed: Follow updates from Newfoundland Power and N.L. Hydro during known testing windows to distinguish between scheduled maintenance and unexpected system trips.
Frequently Asked Questions
Why does the power go out during testing?
Power outages can occur during high-power testing on the Labrador-Island Link because the system is being pushed to its 900-megawatt design limit. If the system trips, an underfrequency load shed is triggered to balance the grid, which results in temporary power loss for some customers.
How long do these outages usually last?
According to Newfoundland and Labrador Hydro, if a power outage occurs as a result of testing, the interruption is generally expected to last less than 30 minutes.
What is the Labrador-Island Link?
The Labrador-Island Link is a critical piece of energy infrastructure that carries power from Muskrat Falls to the Soldiers Pond Terminal Station on the island of Newfoundland.
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