4AUG

Felton trips, and the grid falls again

2 min read

10:34UTC

Felton unit 1 tripped at 11:05 on 14 July and took the national grid down with it, four days after a broken transmission line did the same job.

← Back to Cuba's blackout: UNE blames a 110kV fault Jump to analysis ↓

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Key takeaway

Cuba's grid collapsed a third time in July, this time from an eastern thermal block.

Felton unit 1, a thermal block in Holguín province in eastern Cuba, tripped at 11:05 on Tuesday 14 July and took the national system down with it, the second total collapse in four days and the third of the month, after Nuevitas on 6 July and the transmission fault of 10 July ¹. UNE, the state grid operator, reported the generation deficit widening to 2,020 MW.

Felton holds one of the largest units in the Cuban fleet, and the hour of the trip is what makes it diagnostic. Demand at 11:05 in the morning sits well below the 20:30 evening maximum, when the system is stretched hardest. A grid carrying any reserve at all absorbs the loss of one block at that time of day without the public noticing. This one went dark instead.

Three total collapses in nine days, from three unrelated causes, set a cadence the island had not seen: a generating unit in Camagüey, a transmission line through the centre of the country, and now a thermal block in the east. The failures share no component. What they share is a system that can no longer absorb the loss of anything at all, which turns the next collapse into a question of timing rather than of cause.

Deep Analysis

In plain English

Felton is one of Cuba's ageing thermal power plants, in Holguín province in the east. When its Unit 1 tripped (failed) at 11:05 on 14 July, it triggered the same kind of frequency swing that caused the 10 July collapse, and the whole national grid went down a second time within the same window. The deficit, the gap between how much power the island needs and how much it can actually generate, widened to 2,020 MW after this trip. That is roughly two-thirds of total national demand missing at once.

Deep Analysis

Root Causes

Fuel shortages force the grid operator to choose between running ageing thermal units continuously to cover peak demand, or halting them for maintenance and accepting a larger immediate deficit. Felton unit 1 tripped while carrying that continuous-running burden, with no rotation slack to spare.

The 10 July collapse left 11 of 16 thermal units offline for days afterward, meaning any single further unit, including Felton, was carrying a larger share of national load than normal when it failed on 14 July, making its loss more consequential than an equivalent trip would have been in a healthier system.

Escalation

The second total collapse within a week, following directly from a system already running with more than two-thirds of its thermal fleet offline, indicates the deficit is compounding rather than stabilising.

What could happen next?

Consequence
The widened 2,020 MW deficit after Felton's trip fed directly into UNE's own worsening 15 to 16 July bulletins, which recorded the deficit climbing further to 2,240 MW forecast.

Source Landscape

This story draws on neutral-leaning sources

Primary parallel: In April, the Camilo Cienfuegos refinery's restart after four months offline measurably narrowed the deficit, from 1,732 MW down to the 1,365 to 1,395 MW range within days, showing the system's sensitivity to single-unit changes runs in both directions.

Counter-parallel: Unlike April, when the grid absorbed that swing without a full collapse, by 14 July there was no equivalent margin left. A single unit's loss, Felton unit 1, was enough to widen the deficit to 2,020 MW just four days after the previous total collapse.

Consensus view: CiberCuba and Diario de Cuba's cross-referenced reporting shows the generation deficit widening across the same week as the 10 July collapse, with maintenance backlogs cited across units at CTE Mariel, CTE Antonio Guiteras, CTE Diez de Octubre and CTE Renté, alongside Felton.

Counter-view: UNE's own 16 July bulletin, two days after Felton's trip, shows the deficit climbing further still, to a 2,240 MW forecast, indicating the deterioration continues past this single event rather than resolving after it.

Key tension: Whether Felton's trip was an isolated equipment fault or a symptom of a grid already stripped of reserve margin by the 10 July collapse four days earlier, when 11 of 16 thermal units were offline.

Sources:CiberCuba, Infobae, 14ymedio and Diario Libre (cross-corroborated)

Mentions:Sistema Eléctrico Nacional →CTE Felton →UNE →Holguín →Antonio Guiteras →CiberCuba →Camagüey →Camilo Cienfuegos refinery →Mariel →Cuba →Felton unit 1 →

First Reported In

Update #11 · Cuba blames the blockade for a 64% gas rise

CiberCuba, Infobae, 14ymedio and Diario Libre (cross-corroborated)· 17 Jul 2026

Read original →

Causes and effects

Caused by

One 220kV line took the island dark

UNE's 16 July bulletin reporting a 2,240 MW forecast deficit followed the 14 July Felton collapse that stripped further generation capacity.

Occurred 10 Jul 2026

Read story →

This Event

Felton trips, and the grid falls again

A third total collapse in July, from a third unrelated cause, marks a fleet that can no longer afford to lose any single component.

Led to

UNE blames a 110kV fault, not a storm

Repeats the Felton-driven collapse pattern from 14 July.

Occurred 2 Aug 2026

Read story →

Different Perspectives

OCDH (Observatorio Cubano de Derechos Humanos), Madrid

OCDH itemised its previously reported first-half tally of 1,949 repressive actions into named categories, including 91 cases against independent journalists and 50 retaliations against prisoners' relatives. The monitor documents state conduct without endorsing sanctions as the remedy, a distinct position from Washington's designation campaign.

US State Department and OFAC

Four Federal Register notices on 31 July confirmed GAESA's own SDN designation dates to 7 May, closing a gap left by coverage that described only GAESA-controlled assets as sanctioned; Rubio separately called US sympathy for Cuba anti-Americanism. Whether the lagged gazetting reflects deliberate sequencing or administrative backlog is not established.

Unión Eléctrica (UNE), Cuba's state grid operator

UNE's load-dispatch director blamed the 2 August total collapse on a 110kV Havana substation fault and a Felton trip, not the storm damage CNN and AP cited, and a day later Decreto 160 took force, de-listing 46 private-sector activities. Havana's own record was more specific, and more severe, than the wire account.

Spain (Foreign Ministry and hotel investors)

Madrid has worked to shield Spanish hotel operators exposed to Cuba, and OFAC's General Licences 2 and 3 winding down the Guernsey-listed CEIBA Investments fund give those investors a defined exit rather than an abrupt block. Spain's stake in managing an orderly wind-down, not confronting the designation itself, keeps it distinct from Havana's collective-punishment framing.

Cuban Ministry of Foreign Affairs (MINREX)

Foreign Minister Bruno Rodriguez Parrilla called the 23 July designations "castigo colectivo" and defended the medical missions as protecting healthcare access for patients in the countries where Cuban doctors serve, without addressing the evasion allegation against Coral Maritima directly.

US Treasury (OFAC) and State Department

OFAC designated Cuba's medical-missions operators and named the Mariel-Coral Maritima transfer as GAESA sanctions evasion on 23 July, characterisations Washington has not independently substantiated in public documents reviewed. The administration frames the wave as closing hard-currency channels sector by sector, following the same pattern applied to tourism and financial clearing in June and July.