Arc Terminator Active Arc-Resistant Switchgear

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1 Arc Terminator Active Arc-Resistant Switchgear Increasing safety and productivity by extinguishing internal arcing faults within the switchgear. The Square D Arc Terminator from Schneider Electric offers unsurpassed arc flash protection for personnel and equipment. Developed through careful design, analysis and testing to go beyond the IEEE C test guidelines, the Arc Terminator system helps to deliver an additional degree of protection from arcing faults in medium-voltage switchgear. You will no longer have to compromise desired protective relay settings and coordination to achieve improved arc flash protection. Now there is Arc Flash and Arc-Resistant protection in one solution: Active Arc-Resistant Switchgear. Key Benefits Achieve all arc resistant accessibility types 1 Type 2A, 2B, 2C per IEEE C , UL witnessed Reduce incident energy and arc flash hazard Level 0 PPE, even with doors open 2 Reduce downtime caused from arcing event Minimize equipment damage Eliminate special requirements for buildings Venting and exhaust plenums are not required Reduce lineup footprint and weight as compared to traditional arc resistant switchgear 1 When configured with no unprotected zones within MasterClad switchgear. 2 Based upon IEEE Std methodology with functional Arc Terminator system.

2 System Operation Arc Terminator Active In the event of a confirmed internal arcing fault, the high-speed, electromechanical switch provides a low impedance parallel path to effectively transfer the fault current from the arc to the three-phase, main bus assembly of the switchgear. The main bus carries the fault current while it is being sensed and cleared by the normal complement of current transformers (CTs), protective relaying, and upstream Arc-resistant over-current protective device. Switchgear Increase safety and productivity: Extinguish The high-speed switch is closed by a control unit via an output signal produced by simultaneous input from two different sensors: 1) A current sensor that detects both a discontinuity internal occurring arcing the current faults waveform within and the exceeding switchgear. of a threshold current level. 2) An optical sensor that visually detects the arc. Benefits These signals are sent to a digital AND gate in the controller Complies which with processes IEEE C , the signals UL witnessed and sends an output to close the switch. The combination of these two signals prevents Reduces nuisance incident operations. energy and arc flash hazard Arc Terminator protection is limited to its zone of protection, Reduces which operating can be downtime configured to protect the entire switchgear lineup. The Arc Terminator operation does not impact Minimizes the normal equipment protective relaying damage functions, nor does it change any protective relaying system settings. The fault clearing duty remains under the domain of the main circuit breaker Eliminates special requirements for buildings and plenums or upstream over-current protective device. Additionally, the Arc Terminator system can be used in most applications, regardless of the type of load being connected to the switchgear. Key Features UL witnessed and meets all the requirements of C Test Guidelines for Arc-Resistant equipment Active system provides an additional degree of protection for both personnel and equipment Reliability; perform system self checks during operation Display captures and logs location, time, and date of arcing event. Quick diagnosis and recovery 50 ka fault capability throughout the protected areas High-speed switch (front) Light detector System display Junction box Typical Applications 5 and 15 kv medium voltage equipment Applications requiring arc flash hazard reduction and or arc-resistant equipment (examples include oil and gas facilities, industrial facilities and hospitals) Components of Arc Terminator System

3 Arc Terminator Active Arc-Resistant Switchgear Side View Diagram of the High-Speed Switch Mounted above a 1200/2000A Circuit Breaker in Masterclad Switchgear (example arrangement) Radial Distribution Scheme (Main and Feeder Breakers) with AT System (example arrangement)

4 System Ratings and Specifications Type Ratings Nominal Fault Currents (I) 25 ka rms 40 ka rms 50 ka rms Currents Continuous Current Rating Making Current Short Time Current Interrupting Current Maximum Operating Voltage Not applicable 2.6 x l ka peak 48 ka for 1 second Not applicable 15 kv rms Voltages 60 Hz. One Minute Withstand 36 kv rms BIL 95 kv Total Operating Time 5.5 ms 4.5 ms 4.0 ms Mechanical Mechanism Reset Closing Mechanism Mechanical Operating Life Manual only Spring operated with electrodynamic assist 100 operations Electrical Operating Life Normal Operating Ambient Temperature -30 C to + 40 C Environmental Seismic Humidity 2003 IBC maximum California requirements Up to 95% RH Fault Detection Arc Detection Closing Signal Instantaneous analog detection from CT on main bus entrance Optical detectors installed on each individual compartment Provided by the output of AND gate for simultaneous fault current and optical signals Initial Power Up Time Max 1 minute with LED indicator Power Supply Requirements Vac or Vdc1 1 Auxiliary Contacts 2a and 2b type contacts (Form C) 1 48 Vdc realized via converter

5 Incident Energy Reduction* kv Class with Arc Terminator System kv Class without Arc Terminator System 2 Arcing Fault Current (in ka) Working Distance (in inches) Incident Energy (in cal/cm²) PPE Level Arcing Fault Current (in ka) Working Distance (in inches) Incident Energy (in cal/cm²) PPE Level * Data based upon IEEE Std methodology. 1 Data based upon functional Arc Terminator System. 2 Data assumes fault clearing time of 50ms (3 cycles). 5 cycle breakers will have higher incident energy levels. System Compliance Standards* Codes and Standards UL508 Descriptions Industrial Control Equipment, Sixteenth Edition, February 1993, and any identified subsidiary standards CSA-C22.2, No. 14-M91 Industrial Control Equipment, September 1991 IEC Electromagnetic Compatibility for Industrial-Process Measurement and Control Equipment Section 2 Electrostatic Discharge Requirements, First Edition, 1995 Section 3 Radiated Electromagnetic Field Requirements, First Edition, 1995 Section 4 Electrical Fast Transient/Burst Requirements, First Edition, 1995 Section 5 Surge Immunity Requirements, First Edition, 1995 C IEEE C IEEE C IEEE IEC Standard for Relays and Relay Systems Associated with Electrical Power Apparatus Standard Surge Withstand Capability (SWC) Tests for Protective Relays and Relay Systems Standard for Withstand Capability of Relay Systems to Radiated Electromagnetic Interference from Transceivers Basic Environmental Testing Procedures Section 6 Vibration (sinusoidal), Sixth Edition, 1995 Section 27 Shock, Third Edition, 1987 Section 29 Basic Environmental Testing Procedures Part 2: Tests Section 31 Drop and Topple, Second Edition, 1975 * System conforms to the referenced Industry Standards.

6 Leader in Arc-Resistant Switchgear Solutions Passive and active solutions available to fit your facilities needs. Schneider Electric also offers a complete passive arc-resistant switchgear solution for those who prefer this method. For more information on this method, please refer to document number 6055HO0901. When properly configured, both active and passive systems fully comply with IEEE C with ratings up to 50 KA but use two totally different approaches. Schneider Electric USA, Inc. For more information, contact Schneider Electric by phone at , by at or visit S. Roselle Road Palatine, IL Tel: Fax: This document has been printed on recycled paper 2010 Schneider Electric. All rights reserved. 6000HO

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