ABB Introduces New Arc Flash Safety Device

Tuesday, February 07, 2012
TVOC-2, a new generation of proprietary Arc Guard System.

ABB LV Products releases new generation of its proprietary Arc Guard System, providing enhanced arc flash protection.


TVOC-2 carries a SIL-2 functional safety rating, achieving the required standard to protect both humans and expensive switchgear equipment

 

The ABB Low Voltage Products division has released TVOC-2, a new generation of its proprietary Arc Guard System that has been protecting electrical equipment from dangerous electrical arc flashes for over 35 years. TVOC-2 features numerous upgrades and new functions to provide superior arch flash protection, detecting faults in low and medium voltage switchgear and disconnecting the power provided to the arc within 30 to 50 milliseconds, preventing serious injury to personnel and damage to expensive equipment. Without the Arc Guard System an arc flash will typically trip a circuit breaker in approximately one second, enough time for the arc to destroy the switchgear and kill or seriously injure a person. TVOC-2 is now UL listed, and when installed along with ABB’s Emax circuit breakers, carries a functional safety rating of SIL-2 as certified by TÜV Rheinland, the leading independent global provider of safety analysis.  The SIL-2 certification confirms that the TVOC-2 has achieved the standard required to protect both humans and equipment.

 

“The SIL-2 rating is especially important because it allows the TVOC-2 Arc Guard system to be used where an engineered safety solution is required,” said Steve Zbytowski, PE, product manager of control gear at ABB. “The rating makes the TVOC-2 a totally unique product in today’s market.”

 

An arc flash is a strong electric current, and often a major explosion, that passes through air when insulation between electrical conductors is no longer sufficient to contain the voltage within them, creating a short that allows electricity to race from conductor-to-conductor1.  Arc flashes can emit heat up to 35,000° F, four times the surface temperature of the sun. It is estimated that five to ten arc flashes occur in the US every day, causing one to two daily fatalities2.  Despite conscientious attempts to design systems that inherently reduce risk, mechanical measures often fail because most accidents occur with the switchgear door open, and electrical breaker protection is solely based on delayed over-current stoppages. The main cause of arc flashes is human error and 65% occur when an operator is working on the switchgear. 

 

The Arc Guard system can detect an arc flash in less than one millisecond, and depending on the disconnecting device, it will typically disconnect the power to the switchgear within 30 to 50 milliseconds.  This will not prevent the accident, but it will significantly reduce the damage.


The Arc Guard System uses light as the main condition to instantaneously trip the incoming circuit-breaker, responding in milliseconds and overriding slower protection elements.  The system acts in three phases:

 

  • Detection - on optical sensor senses when light (an arc flash) is inside the equipment
  • Recognition - the arc monitor determines the intensity of the light
  • Action - the TVOC-2 sends a signal to trip the breaker(s)

Short circuit protection alone is not enough to provide the necessary response time because power distribution systems often include a required selectivity designed to achieve desired plant efficiencies and ensure power availability. This selectivity delays the breakers tripping in the necessary time. The Arc Guard System, along with properly specified circuit breakers, overrides the protection delays within the necessary timeframes to minimize injuries and equipment damage.

 

“ABB has over 35 years of experience detecting arc faults with the predecessors to the TVOC-2,” said Zbytowski.  “While we are proud of that history, we weren’t satisfied with only protecting equipment. Our goal, which is now realized, was to gain the TÜV certified SIL-2 rating allowing the TVOC-2 to be used in engineered safety solutions.”

 

In addition to achieving the functional safety design as approved through rigorous third party testing and certification, the feature upgrades of TVOC-2 provide significant system enhancements, including:

 

Reliability:

 

  • Pre-calibrated optical sensors and fiber optic point sensors
  • Hardware based self monitoring system for critical functions; the software is used only for supervision and information processing
  • Wide ranging input voltage ratings (100 to 240 V AC and 100 to 250 V DC)
  • Selective tripping of only the affected circuit breaker, not all breakers within a system

 

Flexibility:

 

  • The HMI can be mounted on the TVOC-2 or panel door
  • Standard system has 10 sensor inputs, expandable to 30
  • The system can be configured according to specification

 

Simplicity:

 

  • User-friendly start-up menu, easy to install
  • Mounting options on DIN-Rail or directly on a panel wall
  • Easy to expand as the switchgear grows

 

The Arc Guard System is also compatible with an extremely wide range of applications, including new or OEM installations, and old equipment soon to be out-of-date without a safety upgrade. It can also be installed on systems of all sizes and values, from $10,000 switchgear up to systems in excess of $1,000,000.  Some of the industry segments and applications that can benefit from Arc Guard include substations; critical power facilities such as hospitals and data centers; yachts; cruise and refrigerated container ships; oil rigs; chemical plants; railroad - trains and way stations; steel mills; and wind/solar power facilities.

1. As defin

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter February 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

People & Company News

SunEdison Restrained from 'Unusual' Asset Transfers

Solar company SunEdison Inc said a U.S. court has restrained the company from making any unusual asset transfers until a hearing in a lawsuit brought on by investors

Maersk to Scrap Ships at India's Alang Beaches, NGO Dismayed

Maersk Line said on Friday it had chosen four shipbreaking yards along India's Alang beaches to handle an increase in vessels that need to be scrapped, to the dismay

Teknotherm Marine Moves HVAC Arm to Bergen

Maritime heating, ventilation and air conditioning (HVAC) firm Teknotherm Marine has established a new subsidiary is established with the name Teknotherm Marine HVAC AS.

Technology

Sentinel Launches New Rudder Feedback Unit

Sentinel, a Beier Radio company, has designed and manufactured a new Rudder Feedback Unit (RFU) with many new features, including watertight components and connections

Innovative Equipment Will Help Unload Listing Ship

Following Smit Salvage’s salvage of the stricken ship Modern Express in the Gulf of Biscay, another Rotterdam company has now become involved in the rescue operations.

Sea IT, Veritas Tankers Ink Long-term Software Deal

Sea IT has entered a long term ICT agreement with Veritas Tankers. The agreement comprises installation of BlueCORE Generation 4, an ICT platform specifically developed for the marine industry,

New Products

Sentinel Launches New Rudder Feedback Unit

Sentinel, a Beier Radio company, has designed and manufactured a new Rudder Feedback Unit (RFU) with many new features, including watertight components and connections

First ‘Reachstacker’ Starts Duty in the Port of Ravenna

Liebherr Maritime Cranes delivered a LRS 545, the first model out of the new reachstacker series, to the Italian Port of Ravenna.   The Port of Ravenna is one

Cummins Expands Marine Tier 3 Product Line

Cummins Inc., a manufacturer of diesel engines and generator sets for the marine industry, has launched a new Onan marine U.S. Environmental Protection Agency (EPA) Tier 3-certified generator,

Electronics

Update on Seagull Mobile apps for Crew

The Seagull mobile app for crew training status is set to revolutionise the way seafarers track their training records and receive critical safety alerts, by making

Danelec Marine Making Free ECDIS Upgrades

Ships with older Danelec ECDIS models are being upgraded to new hardware and software   Danelec Marine has launched a program to provide free upgrades of shipboard

Transas Academy Launched

Transas Academy launched during the Simulation User Conference 2016   Transas has launched its newly established Transas Academy, part of the company's THESIS,

Maritime Safety

Maersk to Scrap Ships at India's Alang Beaches, NGO Dismayed

Maersk Line said on Friday it had chosen four shipbreaking yards along India's Alang beaches to handle an increase in vessels that need to be scrapped, to the dismay

Video: Catapult Testing on Aircraft Carrier Abraham Lincoln

U.S. shipbuilder Huntington Ingalls Industries’ (HII) Newport News Shipbuilding division has begun testing the updated catapult systems aboard the U.S. Navy aircraft

Owner Fined for 'Dangerously Unsafe' Vessel

The owner of a harbor tanker has been fined £3,000 with more than £7,000 costs after pleading guilty to a charge of operating a vessel for being dangerously unsafe.

 
 
Maritime Contracts Maritime Security Maritime Standards Naval Architecture Navigation Pod Propulsion Salvage Ship Electronics Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1228 sec (8 req/sec)