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Siemens Reyrolle 7XG31 Arc Protection Numerical Relay

Siemens Reyrolle 7XG31 Arc Protection Numerical Relay
Siemens Reyrolle 7XG31 Arc Protection Numerical Relay
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Product Code : 7XG31
Brand Name : Siemens
Product Description

Siemens 7XG31 Arc Protection Relay.


The arc is detected using an optical sensor & the signalinput to a protection device which also monitors the load current on thesystem. Conventional current based protection techniques are at timeschallenged by the nature of arcing faults, and can result in slow protectionclearance times. Slow protection clearance times increase the risk to nearbypersonnel and increase the degree of damage to plant and equipment. Byemploying an optical detection technique, arc fault protection results in fastclearance of arcing faults.

When an arc fault start current is coincident with a signalfrom the optical sensor a trip command is output. An arc trip only signal canbe achieved within 10ms which can be considerably faster than that provided bya traditional IDMT overcurrent relay. This is because the onset of an arcingfault can occur at relatively low fault currents. Arguably the greatest risk ofarc fault damage exists at the CB cable termination & in the CB chamberitself due to the slow clearance times of the IDMT feeder protection.

The ReyArc range of protection devices provide multiple arcfault protection schemes depending on your protection system requirements:


ReyArc Arc Protection range:

7XG3120 Arc Fault Monitor Relay, with 2 or 3 arc pointsensor inputs, 2 separate tripping- duty outputs.

7XG3123 ARC Fault Interface Module, with 1 or 2 arc pointsensor inputs, high-speed binary output to interface with protection relaybinary input.

7XG3124 Arc Fault Monitor, with IEC 61850 and up to 16 arcsensor inputs, 2 tripping-duty outputs.

7XG3127 Arc Fault Monitor, with 4 arc point sensor Inputsand 1 linear sensor input, 2 separate tripping zones with 4 output trippingcontact and 1 supervision contact.

7XG3130 High-Speed Arc Sensor, with 1 or 2 optical pointsensors per unit.

7XG3140 High-Speed Linear Arc Sensor, with optional sensorlength up to 40 metres



Office No.-9, Plot 53/54, Sector-34, Space Heights, Near Tawa Hotel, Kamothe, Navi Mumbai - 410209, Maharashtra, India
Mr Piyush Lalchand Rathi (Partner)
Mobile :+919819614841, +919769207841
Mr. Dnyanesh Gawande (Partner)
Mobile :+919833686249