Global Capability

RSSUS SERVICES INC.

                                   

 Manufactures of Instrumentation & Safety Solutions


IS- ELECTRICAL SYSTEMS

RSS design, manufacturer, install and commission Intrinsically Safe - IS certified instrumentation & control systems for varied Onshore and Offshore applications. Below are some of the basic components that contribute to a IS circuit:

Intrinsic Safety is the method of protection for control and instrumentation circuits where the nominal voltage is 24 or less and the current is normally less than 100 mA. The concept of intrinsic safety is to limit the voltage and current so that there is never a spark with enough energy to create an explosion.

Intrinsic safety when properly used removes the ignition from the explosion triangle. There are three components to an intrinsically safe circuit:  the field device, intrinsically safe barrier and field wiring.

            thermocouples, RTDs, LEDs and resistors

There are three components to a barrier, that limit current and voltage: a resistor, at least two zener diodes, and a fuse. The resistor limits the current to a specific value known as the short circuit current, ISC. The zener diode limits the voltage to a value referred to as open circuit voltage, Voc. The fuse will blow when the diode conducts. This interrupts the circuit, which prevents the diode from burning and allowing excess voltage to reach the hazardous area.

There are always at least two zener diodes in parallel in each intrinsically safe barrier.  If one diode should fail, the other will operate providing complete protection.

RSS also supply IS Pressure Transmitters and Proximity Switches and other IS instrumentation allowing IS control to be used in hazardous locations, reducing the need for bulky cabling, glands and enclosures.  


INTRINSICALLY SAFE

prequalificationletter.pdf

Rig Supply

Instrumentation

isintrinsicallysafesystems.pdf

Rig Supply

Intrinsically Safe Electrical Systems

For more information contact us on:-

Call: +1 281 676 8008  Fax: +1 281 676 8033

or email: sales@rssusservices.com -  www.rssusservices.com

RSS is a subsidiary of Risk Security Services US Inc.  All rights reserved.

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