Arc Flash InitiatorUser Manual

ARC256.AE.3 - Year 2014ARC 256x

2User Manual

Safety Instructions Use the ARC 256x exclusively in conjunction with the OMICRON test sets listed and the

application field specified at "Designated Use" below. The manufacturer is not liable for damage resulting from unintended usage.

Use the ARC 256x only in a technically sound condition. Do not open the ARC 256x or remove any of its components.

Designated UseThe ARC 256x Arc FlaCMC 256plus and CMsimulates an arc by emprotection systems arcthe event to the arc flaThe CMC test set proviThe actual test is carriesoftware.Any other use of the ARpersons.

Connecting AR

Connection cable,6 m (19.7 ft)sh Initiator is an accessory for OMICRON CMC 356, CMC 353, C 256-6 test sets. To test an arc flash protection system, the ARC 256x itting a high-intensity light pulse from its Xenon gas discharge tube. The flash sensor (fiber or point-shaped) detects this light pulse and signals

sh protection relay.des both the supply voltage as well as the trigger signal for the ARC 256x. d out using the State Sequencer test module of the Test Universe

C 256x is considered improper and may result in damage to property or

C 256x to CMC Test Set

CMC test set rear

ARC 256x

ext. Interface

ARC 256x

Mounting the ARC 256xAs the ARC 256x contains a high intensity Xenon flash tube, ensure that the lens is always pointed towards an arc flash sensor, and not towards any person. Do not stare at the lens during operation as the high intensity light source may cause damage to your eyes. The ARC 256x is connected directly to a CMC test set ext. Interface connector by means of the attached cable.After connection of the ARC 256x device, the green LED will light solidly once the device is ready for use. The Xenon flash simulated arc is produced each time the CMC test set commands it to do so (see below). The ARC 256x should Ensure that the tack doAlign the ARC 256x, tolength of the arc flash dis a point or linear sensWhen positioning the Aangle. This will ensurecorrectly aligned, and r

ARC 256x Fron

The Power/Ready LEDindicates that the ARCA flashing LED indicatewait until the LED is onuse indicates that the cthe use. After a flash e 3

be positioned in a suitable location using the supplied plastic tack. es not obscure the lens. make sure that the lens on the back of the device is centered over the etector fiber or lens. This will vary slightly depending whether the detector or. Ensure that the lens is at least 2 cm away from the sensor or fiber. RC 256x over a fiber, align the ARC 256x at an approximately 30 degree best coupling of the light into the fiber. Ensure that the ARC 256x is eposition if required.

t Panel Indicator

(green) will light when the CMC test set power is turned on. The LED 256x internal power supply is operating correctly.s that the internal circuitry is preparing for the next Xenon flash. Simply solidly before beginning first use. A short duration or brief blink during ircuitry is refreshing the internal circuitry continuously. This will not affect vent, the LED will again blink until the unit is ready for use.

Power LED.LED is on when the CMC test set provides power to the ARC 256x.

4User Manual

Configuring ARC 256x in the Test Universe SoftwareThe ARC 256x output pulse is triggered by one or both of the CMC test sets transistor outputs 12 or 14. The command must be removed for 5 seconds to allow the next flash event.Specify the outputs in the Test Universe Hardware Configuration.1. Launch the Test Universe module State Sequencer.2. Start the Hardware Configuration.

On the Binary Outputs window select the binary trigger output of your choice.

ARC 256x

Field Performance ExamplesHigh Speed Output TrippingState Sequencer showing the response of a Schweitzer SEL751 relay with high speed outputs:

The SEL751 relay usedirectly at the arc flashZone 1 is the output ofWith the ARC 256x nochamber, an overall triThe usage of the electan overall trip time of 9

Ordering InformARC 256x 5

d was equipped with high speed outputs. By pointing the ARC 256x sensor an overall trip time of 4.7 ms was achieved. the SEL751 relay.t pointing directly towards the arc flash sensor, but still within a reflective p time of 5.8 ms was achieved.romechanical / conventional relay outputs of the SEL751 relay achieved .6 ms.

ationArticle number VEHZ0092

6User Manual

Technical DataElectromagnetic Compatibility (EMC)This device is compliant with the provisions of the directives of the Council of the European Community for harmonization of the legislation in the Member States regarding electromagnetic compatibility.EEC EMC Directive 89/336.

Mechanical DataDimensions (w x h x d)Weight:Cable length:

Emission IntensityThe following plot indicoperated at a current dto sunlight (7000K). Th

Maximum Pulse RaThe ARC 256x can pro

Minimum Pulse WiThe arc duration is gre

Continuous Duty LThe ARC 256x has a mreduced peak light inte

Relative intensity: 40 x 80 x 20 mm (1.57 x 3.15 x 0.79 inches)215 g (0.473 lbs)6 m (19.7 ft)

ates the relative emission intensity vs. wavelength of a Xenon flash tube ensity between 4000-10000 A/cm2. The spectral content is very similar ese lamps provide the highest visual radiation efficiency (up to 40lm/W).

tevide a pulse repeated every 5 seconds.

dthater than 15 ms for a single flash.

imitationaximum pulse repetition rate of once every 2 seconds. This will be at a

nsity.

6000 A/cm

Black body radiation

Wavelength (nm

)

ARC 256x

Pulse Response TimeA circular test utilizing an ARC 256x to emit a light pulse, with detection using an optical scanning head OSH256 indicates that the light pulse reaches detectable levels within 100 s.

Internal Supply VoltageThe ARC 256x generates internal +5 V and +300 VDC supplies for the electronic sub circuits. The +300 V supply is discharged automatically within 3 seconds after unplugging the unit.

Current Drain The start-up curren

absolute maximum The continuous cu

8User Manual

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Safety InstructionsDesignated UseConnecting ARC 256x to CMC Test SetMounting the ARC 256xARC 256x Front Panel IndicatorConfiguring ARC 256x in the Test Universe SoftwareField Performance ExamplesHigh Speed Output Tripping

Ordering InformationTechnical DataElectromagnetic Compatibility (EMC)Mechanical DataEmission IntensityMaximum Pulse RateMinimum Pulse WidthContinuous Duty LimitationPulse Response TimeInternal Supply VoltageCurrent DrainStart Up Time

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