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	APPLICATION NOTES VOLUME 2
WHO'S AT RISK FROM ARC FLASH?

Don't risk it!

Some of the employees at risk from arc flash hazards include mechanics, electricians and HVAC personnel.

The most dangerous tasks include:
• Removing or installing circuit breakers or fuses
• Working on control circuits with energized parts exposed
• Racking circuit breakers in and out of switch gear
• Applying safety grounds
• Removing panel covers
• Low voltage testing and diagnostics

You can minimize your risks by avoiding working on energized equipment! Learn how Senva current sensors minimize calibration,

CLICK HERE TO REQUEST PRESET SENSOR SAMPLE

What is an arc flash hazard?

ARC FLASH ACCIDENT

Think of an arc flash as a short circuit through the air. In an arc flash incident, an enormous amount of concentrated radiant energy explodes outward from electrical equipment.

The explosion creates pressure waves and a superheated ball of gas that can severely burn a worker’s body and melt metal. The pressure waves can also propel loose material like molten metal, pieces of damaged equipment, tools and other objects, through the air.

In general, arc flash incidents are highly improbable on systems operating at less than 240 volts phase to phase (120V to ground) when fed by less than a 120 KVA transformer 120 volts does not provide sufficient energy to cause an arc flash hazard. Most 480V electrical services have sufficient capacity to cause an arc flash hazard. Medium-voltage equipment (above 600V) is higher energy and therefore a higher arc flash hazard.

HOW SENVA SENSORS REDUCE ARC FLASH HAZARD

Avoiding calibration in an energized enclosure is the best way to avoid arc flash when working with current sensors. Senva offers two models--Autoset and Preset—which both address this application issue.

Autoset^tmself-calibrates after installation using Senva’s 24sense^tm technology which adapts to system changes, such as air balancing.

Preset^tm uses a unique, patent pending, scaled adjustment which is set to the motor FLA. It is priced comparably to manually adjusted sensors, but saves up to $30 per point, because there is no need to return to the site to calibrate

Get all the facts at Senvainc.com.

SenvaTM Inc. - - Portland, Oregon - - www.senvainc.com - - 1-866-660-8664