Arc Flash Tragedy Strikes Phoneix

Phoenix, AZ – Numerous buildings in the downtown area of Phoenix were without power for days following a recent fatal arc flash incident. One Arizona Public Service Electric Company (APS) worker was killed, and another was injured when an underground electric vault caught fire on Sunday June 30th.

Phoenix police report the name of the worker who died as Ricardo Castillo, age 42. Emergency crews who responded to the fire say that flames where shooting out of a manhole at the scene. Police have said that a 46-year-old worker had exited the vault, and suffered burns on his hands and face. That man was taken to a local burn center for treatment and later released.

Many in the Phoenix area were impacted by this tragic electrical flash fire. The fire that followed the arc flash left a number of downtown buildings and light-rail statioarc flashns without power well into the week. According to a Maricopa County spokesperson, around 1,000 workers had to either take Monday July 1st off or work from home due to the power outage. Trials and hearings at the Maricopa County Superior Court complex had to be cancelled in the wake of this unfortunate event.

According to news reports, Castillo and the other APS employee were replacing a power cable in an underground vault when an electrical flash triggered a fire. APS and the Arizona division of OSHA will be working together to determine what caused the fatal arc flash.

An Arc Flash is an electrical explosion due to a fault condition or short circuit when either a phase to ground or phase to phase conductor is connected and current flows through the air. Arc flashes cause electrical equipment to explode, resulting in injury or death to workers and destruction of electrical equipment.

During an arc flash, temperatures may exceed 35,000° F. For perspective, the surface of the sun is 9000° F. The high temperature of an arc flash causes the surrounding air to heat very rapidly and exert extreme pressures, resulting in an arc blast. The arc flash or arc blast can vaporize all solid copper conductors. These copper conductors will expand up to 67x times their original volume when vaporized. The resulting arc flash produces fire, intense light, pressure waves, and flying shrapnel.

When an arc flash happens, it is without warning and lightning quick. The result of this violent event is usually destruction of the equipment involved, fire, and severe injury or death to anyone nearby. Proper safety and protection measures must be taken to limit the damage of an arc flash including conducting arc flash studies, hazard analysis and labeling, short circuit studies, and NFPA 70E electrical safety training. Please contact an electrical safety specialist at Martin Technical if your plant or facility has any concerns about arc flash risks.

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Three Workers Burned in Arc Flash at Ontario Mall

workers burnedLondon, Ontario – O’Connor Electric Ltd was fined $60,000 this week as a consequence of a Jan 2018 arc flash incident which burned three electrical workers at an Ontario shopping mall. The company plead guilty to failing to establish and implement written measures and procedures to ensure that its workers were adequately protected from electrical shock and burn.

At the time of the arc flash incident, a crew of six were upgrading the service in an electrical room at the mall. The workers were planning on installing a new disconnect switch and wiring. Three O’Connor Electric employees has started installing the disconnect when an arc flash occurred. Canadian Occupational Health and Safety officials determined that the existing service had not been shut down when work began. Mistakenly working on an energized electrical system lead to the arc flash which burned the employees.

In Canadian court proceedings this week, O’Connor Electric Ltd. and one supervisor plead guilty. The supervisor was charged with failing to ensure workers followed OHSA guidelines for properly disconnecting the power supply. The company was charged $55,000 in penalties, and the supervisor was fined $5,000.

Ontario Construction Regulations dictate that power supply “to the electrical equipment, installation or conductor shall be disconnected, locked out of service and tagged … before the work begins, and kept disconnected, locked out of service and tagged while the work continues.” Accordingly, the Ministry of Labour found that O’Connor Electric failed to establish working conditions compliant with that regulation, and that the supervisor failed to ensure that workers followed the regulations.

Arc flashes are violent and lightning-quick. They can cause electrical equipment to explode, resulting in injury or death to workers and destruction of electrical equipment. There are many avenues to mitigate or reduce the risk of arc flash incidents and their threat to electrical and maintenance workers. Contact a member of our Electrical and Industrial Safety team today to discuss Arc Flash Assessment and Labeling, Compliance, and/or Training needs of your staff and facility. At Martin Technical, our goal is always to provide practical safety and efficiency services that make industrial plants and facilities better, safer, and more efficient.

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Arc Flash Hazards Garner Over $.278M in Fines

Hayden, AZ – Three workers burned severely by arc flash hazards found at an Arizona metal smelting and extraction facility triggered an OSHA investigation which lead to this week’s announcement of penalties totaling $278,456.

The federal workplace safety agency released its citation against ASARCO this warc flash hazardseek, claiming two willful violations and one serious violation of electrical hazards standards at the Hayden (AZ) facility.

In its investigation of the arc flash, OSHA inspectors determined that the arc flash occurred after the insertion of a breaker into a 4,160V switchgear. ASARCO was cited for three violations of electrical safety standards: failure to provide the workers with a pre-job briefing before starting work on the energized switchgear, failure to render the electrical breaker inoperable before work began, and failures in providing the employees with arc-flash protective clothing (also known at PPE).

OSHA’s Regional Administrator stated that “arc flash hazards are well known, but can be eliminated when workers are properly trained and protective equipment is provided.”

Not only is electrical safety training required by OSHA, but it’s a vital piece of fulfilling an arc flash analysis or electrical safety program. Once electrical labels are visible, workers need to know how to properly understand the program and read the labels. Employees also need to understand the importance of properly care for their PPE, and how to do so. The need for every worker to understand electrical safety for their equipment and tasks in particular can not be over-stated.

Read more about Arc Flash Analysis and common pitfalls on our website, and contact a member of our Electrical Safety Team today to discuss how Martin Technical can bring awareness to arc flash hazards, get your facility compliant, and increase the safety of your workforce. Martin Technical is the leading provider of practical safety and efficiency services that make industrial plants and facilities better, safer, and more efficient.

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Electrical Panel Explosion Hospitalizes Two TX Workers

Conroe, TX – An electrical panel explosion and fire electrical panel explosionat Aegion Coating Services’ production plant sent two electricians to the hospital this month.

Investigators say two electricians were seriously burned when a high voltage electrical panel they were working on exploded.

According to the local Fire Marshal, multiple agencies responded to the emergency and the facility was evacuated as a precaution. One report described heavy black smoke billowing from a large warehouse at the site. The fire caused by the electrical panel explosion was quickly put out by firefighters. The chemicals present at this plant were a concern for area firefighters, but it was reported that no chemicals were released and local residents were not evacuated.

Both affected electricians were transported to the hospital for burn treatments, but were back to work when the plant was authorized to resume operations later that same day.

The Aegion chemical plant facility north of Houston specializes in pipeline coatings for both onshore and offshore installations. The incident is currently under investigation by the County Fire Marshal’s Office.

Please contact Martin Technical to learn more about Electrical and Arc Flash safety.

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Fatality at Australian Power Plant Reportedly Caused by Arc Flash

Yallourn, Victoria, Australia – A fatal explosion at an Australian Power Station is said to have been the result of a phase-to-phase arc flash. A unit controller with more than 30 years’ experience was critically injured during the explosion in the southeastern-most state of Australia which lead to his death the next day.

EnergyAustralia has identified arc flash as the cause of the explosion at the Yallourn Power Station, however a local union representative is not confident in that explanation and staff at the power station say they are afraid to go to work.

Graeme Edwards died after a high-voltage circuit breaker he was working on exploded last month. Edwards was re-installing a high-voltage circuit breaker on one of the plant’s four generation units when the explosion occurred, a procedure known as “racking.” EnergyAustralia stated that racking is a routine job but potentially hazardous. In this case, the unit burst into flames that burnt most of Edwards’ body. The worker was flown to hospital in a critical condition but died a day later.fatality arc flash

EnergyAustralia said it believed the “sudden electrical discharge” was caused by a “phase-to-phase arc flash.” However, they have yet to determine what caused the short circuit which is the source of union and worker worries about the safety of the workplace.

An Arc Flash is an electrical explosion due to a fault condition or short circuit when either a phase to ground or phase to phase conductor is connected and current flows through the air. Arc flashes cause electrical equipment to explode and can result in an arc-plasma fireball with temperatures in excess of 35,000° F. For reference, the surface of the sun is 9000° F. These extreme temperatures cause rapid heating of surrounding air and extreme pressures, resulting in an arc blast. The arc flash/blast can vaporize all solid copper conductors as they expand up to 67,000 times original volume. The arc flash produces fire, intense light, pressure waves, and flying shrapnel.

Yallorn Power Station workers will not be asked to use affect equipment involved in the incident until EnergyAustralia determines that it is safe to do so. An executive of Yallourn Power Station has said that risk assessments are being conducted and that all safety controls will be reviewed prior to resuming work.

A representative of the union which advocates for the workers at Yallourn Power station has voiced concerns that workers were not provided with the most up-to-date protective gear, including arc flash suits, similar to what bomb disposal workers use.

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Arc Flash at CO Hydroelectric Station Sends 5 to Hospital

Georgetown, CO – Five employees were taken to the hospital following an arc flash at Xcel Energy’s Cabin Creek Hydroelectric generating station last month. Their injuries were not life threatening, and all were treated and released the same day. Xcel Energy self-reported that about eight employees and a few contractors were on-site at the time, and all were evacuated. The incident was initially reported as a fire, but upon further investigation turned out to be an arc flash.

The arc flash at Xcel Energy’s Cabin Creek Hydroelectric generating station occurred within Unit B, inside a self-contained concrete block. Because that particular station provides power only during periods of high demand, there were power outages or interruption of service to customers. The Cabin Creek hydroelectric plant was the site of an infamously fatal flash hydroelectric arc flashfire in 2007 which resulted in the death of 5 contract workers within a permit required confined space. Read more from original source.

When an arc flash happens, it does so without warning and is lightning quick. The result of this violent event is usually destruction of the equipment involved, fire, and severe injury or death to any nearby people. An Arc Flash is an electrical explosion due to a fault condition or short circuit when either a phase to ground or phase to phase conductor is connected and current flows through the air. Arc flashes cause electrical equipment to explode, resulting in injury or death to workers and destruction of electrical equipment. In an Arc Flash, temperatures may exceed 35,000°F (for perspective, the surface of the sun is estimated to be near 9000°F). These extreme temperatures cause rapid heating of surrounding air and extreme pressures, resulting in an arc blast. The arc flash/blast often vaporizes all solid copper conductors in a piece of equipment as the copper expands up to 67,000 times its original volume. The arc flash/blast produces fire, intense light, pressure waves and produces flying shrapnel. There are a variety of reasons why an Arc Flash can occur, but  most are preventable and ultimately attributable to human error. Many arc flashes occur when maintenance workers are manipulating live equipment for testing or repair and accidentally cause a fault or short circuit. Improper tools, improper electrical equipment, corrosion of equipment, improper work techniques and lack of electrical safety training are just some of the events that can lead to a devastating arc flash or arc blast.

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Arc Flash Hospitalizes 3 Chicago Transit Workers

Chicago, IL – An electrical arc flash blew the panel off a transformer in downtown Chicago last week, injuring three Chicago Transit Authority maintenance workers and leaving hundreds in the area without power.

The arc flash relayed to a transformer, sparking a flash fire at an electrical substation near the intersection of North State and East Lake streets. Three workers were injured. Two were in critical condition with serious burns, and a third worker was also taken to the hospital but in good condition.electrical arc flash

Chicago Fire Department spokesperson Larry Langford said the fire took place at a Chicago Transit Authority substation powered by ComEd. ComEd reported that the accident caused an issue with a circuit breaker, which left approximately 500 customers in the area without power.

An Arc Flash is an electrical explosion caused by a fault condition or short circuit when either a phase to ground or phase to phase conductor is connected and current flows through the air. Arc flashes cause electrical equipment to explode, which often result in injury to workers and destruction of electrical equipment.

In an arc flash, temperatures may exceed 35,000° F (for reference, the surface of the sun is estimated to be 9000° F). This discharge of extremely high temperature causes rapid heating of surrounding air and extreme pressures, creating an arc blast. The arc flash and blast usually vaporize all solid copper conductors which expand up to 67,000 times their original volume when vaporized. The arc flash and blast produce fire, intense light, pressure waves and flying shrapnel.

A variety of things can trigger an Arc Flash, but most are preventable and can be traced back to human error. Many arc flashes occur when maintenance workers are manipulating live equipment for testing or repair and accidentally cause a fault or short circuit. Improper tools, improper electrical equipment, corrosion of equipment, improper work techniques, and/or a lack of electrical safety training are some of the failures that can lead to a devastating arc flash or arc blast.

When an arc flash happens, it does so without warning and is lightning quick. The result of this violent event is usually destruction of the equipment involved, fire, and severe injury or death to any nearby people. Proper safety and protection measures must be taken to limit the damage from an arc flash which include conducting an arc flash study, short circuit study, and NFPA 70E electrical safety training.

Contact a member of the Martin Technical Electrical Safety & Training staff today to learn how to protect your workers and your business from the risks of Arc Flash.

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Arc Flash Incident at Tennessee Nuclear Plant

Two contractors working near a 6.9kV electrical bus were injured in an arc flash incident on March 16th at the Tennessee Valley Authority’s Sequoyah Nuclear Plant near Soddy-Daisy, TN, northeast of Chattanooga.

TVA, Nuclear plant, Arc Flash

According to an event notification report from the U.S. Nuclear Regulatory Commission (NRC) posted Monday, the two contractors were transported to a medical facility for treatment. “The cause of the arc flash is not understood at this time, an accident investigation has been initiated by TVA,” the report said.

The two injured contractors sustained first and second-degree burns. Both are employees of Day & Zimmerman, an engineering, construction and security firm based in Philadelphia. TVA told television station WRCB that it has suspended similar work activities until the cause is understood.

Neither of the workers were shocked or contaminated by radiation in the incident. The TVA’s two nuclear reactors at the site, Sequoyah Unit 1 and Unit 2, remain at 100 percent power, the NRC said.

When an arc flash happens, it does so without warning and is lightning quick. The result of this violent event is usually destruction of the equipment involved, fire, and severe injury or death to any nearby people. Proper safety and protection measures must be taken to limit the damage from an arc flash which include conducting an arc flash study, short circuit study, and NFPA 70E electrical safety training.

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Flash Fire Injures 2 in TN Confined Space

Chattanooga, TN – Two workers performing maintenance on a sewer line in Chattanooga were injured in a confined space explosion this week. The two men were employees of SpectraShield, a subcontractor used by the City of Chattanooga.

The men were down in a manhole when the flash fire broke out, they were able to escape the confined space and call for help. Firefighters were dispatched, the fire was already confined space explosionout when they arrived. Tennessee’s OSHA division is involved in the investigation into the cause of the accident.

One worker suffered minor burns but was not hospitalized. The other was transported to a local hospital to be treated for second-degree burns.

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Risk Assessment Could Have Saved Worker’s Life

Singapore – MW Group faces a $200,000 fine resulting from a fatal workplace electrocution. Singapore’s Ministry of Manpower has ruled that a professional Arc Flash Risk Assessment and safe work procedures could have prevented the 2013 fatal electrocution of a worker at the MW Group Pte Ltd’s Pantech Business Hub.

Following a five day trial, MW Group Pte Ltd was convicted for workplace safety and health lapses. The director of the local Occupational Safety and Health Inspectorate stated that the employer knew that the technicians were exposed to the risk of electrocution, yet MW Group failed to provide workers with a step-by-step guide on how to do the job safely.

On the day of the electrocution, a MW Group employee was asked to test and calibrate the ARS machine. The worker held a high voltage probe to test the ARS from 2kV to 12kV and during the test he fell backwards and became unconscious. He died later that day, with the cause of death certified as electrocution.

MW Group, an equipment calibration and testing company, is being fined for failing to conduct a specific risk assessment and establish safe work procedures for the calibration and testing of an arc reflection system (ARS) machine. Safety investigations revealed that although MW Group had conducted a generic risk assessment for electrical testing prior to the accident and electrocution was identified as the only hazard, no control measures were put in place. The Energy Market Authority, in its investigations into the accident, concluded that no proper test fixtures were set up before the start of the high voltage calibration works. Additionally, it was determine that the worker did not maintain a safe working distance of approximately 1.5m from the “live” terminals.

The Ministry of Manpower stated that as the DC output voltage level of the ARS gradually increased, this difference between the worker’s body and the probe to test the ARS he was holding resulted in a flashover, or arc flash – a dangerous type of electrical explosion.

Singapore’s director of occupational safety and health inspectorate said that “The employer knew that the technicians were exposed to the risk of electrocution…yet failed to provide the technicians with a step-by-step guide on how to do the job safely.”

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