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

People & Company News

DP World's H1 Volumes Rise

Ports operator DP World reported on Tuesday first-half 2016 gross container volumes up 1.2 percent on a like-for-like basis and up 2.5 percent on a reported basis.

Samil PwC Okays Hyundai's Management Improvement Plan

Hyundai Heavy Industries (HHI) is notified by Samil PwC, a local member of the global accounting firm PwC, that its 3.5 trillion won worth management improvement

Volvo Penta Names Brown Commercial Marine Sales Director

Dave Brown has joined Volvo Penta of the Americas as director of commercial marine sales.   In this new position, Brown will provide strategic and administrative

Technology

Wärtsilä REvolution system takes sealing technology to New Level

The new Wärtsilä REvolution system is a digital management system that controls, monitors, records and analyses the performance of seals autonomously in real time,

Fuel Consumption, Emissions Monitoring Software Updated

As part of the ongoing Blue Star Delos Renewable Energy Innovation Project, Eco Marine Power (EMP) stated that the Aquarius Management & Automation System (MAS)

MSC Invests in TRAXENS Container Monitoring

MSC Mediterranean Shipping Company has reached an agreement to back French start-up TRAXENS, a developer of cargo logistics solutions and creator of a container monitoring and coordination system.

New Products

Ecofix Filler Coat Cuts Rudder Repairs Cost

With an increasing trend for thruster and rudder manufacturers finishing their products with self-cleaning protective hard coatings, Antwerp headquartered Subsea

Navig8 Acquires Chemical Tanker from STX

Navig8 Chemical Tankers Inc (the “Company”) (N-OTC: CHEMS), an international shipping company focused on the transportation of chemicals, today announced that it

Update to FORAN Lets Users Manage Series of Ships

SENER has launched an update of its FORAN shipbuilding CAD/CAM/CAE system.   Version V80R1.0, which was launched onto the market when FORAN celebrated its 50th anniversary in 2015,

Electronics

Wärtsilä REvolution system takes sealing technology to New Level

The new Wärtsilä REvolution system is a digital management system that controls, monitors, records and analyses the performance of seals autonomously in real time,

B&G Software Upgrade for Zeus2 and Vulcan Chartplotter

B&G, the world’s leading sailing navigation and instrument specialist has upgraded its latest software for the full range of Zeus2 and Vulcan chartplotters. The

Vesper Marine to Protect LIS Underwater Cables

Vesper Marine announced that it has provided its virtual Automatic Identification System (AIS) to New York Power Authority (NYPA) to protect submerged power cables in Long Island Sound.

Maritime Safety

U.S. Backs S. China Sea Bilateral Talks

U.S. Secretary of State Kerry says backs bilateral talks; Philippines says dispute does not involve United States. U.S. Secretary of State John Kerry said on

Piracy Drops to 21-year Low, IMB Reports

Piracy and armed robbery at sea has fallen to its lowest levels since 1995, despite a surge in kidnappings off West Africa, according to a new report from the

Nigeria Becomes Piracy Kidnapping Hotspot, says IMB

Despite global improvements, kidnappings are on the rise, with 44 crew captured for ransom in 2016, 24 of them in Nigeria, up from 10 in the first half of 2015.

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Maritime Standards Pipelines Pod Propulsion Ship Simulators Shipbuilding / Vessel Construction Sonar Winch
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: 0.1673 sec (6 req/sec)