Arc Terminator Active Arc-Resistant Switchgear
←
→
Page content transcription
If your browser does not render page correctly, please read the page content below
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 C37.20.7 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 types1
– Type 2A, 2B, 2C per IEEE C37.20.7, UL witnessed
• Reduce incident energy and arc flash hazard
– Level 0 PPE, even with doors open2
• 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. 1584-2002 methodology with functional Arc Terminator system.
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.
Arc-resistant 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 over-current protective device.
The high-speed switch is closed by a control unit via an output signal produced by simultaneous input from
two different sensors:
Increase safety and productivity: Extinguish
internal
1) A current sensor that detects both a discontinuity arcing
occurring faults
in the current within
waveform andthe switchgear.
the exceeding
of a threshold current level.
2) An optical sensor that visually detects the arc.Benefits
U controller
These signals are sent to a “digital AND gate” in the Complieswhich
with processes
IEEE C37.20.7, UL witnessed
the signals and sends an output to close
the switch. The combination of these two signals prevents nuisance
U Reduces operations.
incident energy and arc flash hazard
Arc Terminator™ protection is limited to its zone of Uprotection,
Reduceswhich
operating
can bedowntime
configured to protect the entire switchgear
lineup. The Arc Terminator operation does not impact U Minimizes equipmentrelaying
the normal protective damage functions, nor does it change
any protective relaying system settings. The fault clearing duty remains under the domain of the main circuit breaker
U 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 High- speed
switch (front)
• UL witnessed and meets all the requirements
of C37.20.7 Test Guidelines for Arc-Resistant
equipment Light detector
• Active system provides an additional degree of
protection for both personnel and equipment
• Reliability; perform system self checks during
operation System display
• Display captures and logs location, time,
and date of arcing event. Quick diagnosis
and recovery
• 50 kA fault capability throughout the Junction box
protected areas
Typical Applications
• 5 and 15 kV medium voltage equipment
• Applications requiring arc flash hazard Components of Arc Terminator System
reduction and or arc-resistant equipment
(examples include oil and gas facilities,
industrial facilities and hospitals)
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)
System Ratings and Specifications
Type Ratings
Nominal Fault Currents (I) 25 kA rms 40 kA rms 50 kA rms
Continuous Current Rating Not applicable
Currents Making Current 2.6 x l kA peak
Short Time Current 48 kA for 1 second
Interrupting Current Not applicable
Maximum Operating Voltage 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
Mechanism Reset Manual only
Mechanical Closing Mechanism Spring operated with electrodynamic assist
Mechanical Operating Life 100 operations
Electrical Operating Life 4 2 1
Normal Operating Ambient Temperature -30°C to + 40°C
Environmental Seismic 2003 IBC maximum California requirements
Humidity Up to 95% RH
Instantaneous analog detection from CT on main
Fault Detection —
bus entrance
Optical detectors installed on each individual
Arc Detection —
compartment
Provided by the output of AND gate for simultaneous
Closing Signal —
fault current and optical signals
Initial Power Up Time — Max 1 minute with LED indicator
Power Supply Requirements — 104–254 Vac or 70–250 Vdc11
Auxiliary Contacts — 2a and 2b type contacts (Form C)
48 Vdc realized via converter
1
Incident Energy Reduction*
4.76-15.0 kV Class with Arc Terminator System1 4.76-15.0 kV Class without Arc Terminator System2
Arcing Fault Working Incident Arcing Fault Working Incident
Current Distance Energy PPE Level Current Distance Energy PPE Level
(in kA) (in inches) (in cal/cm²) (in kA) (in inches) (in cal/cm²)
25 18 0.46 0 25 18 4.19 2
40 18 0.62 0 40 18 6.91 2
50 18 0.70 0 50 18 8.76 3
*
Data based upon IEEE Std. 1584-2002 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 Descriptions
Industrial Control Equipment, Sixteenth Edition, February 1993, and any identified
UL508
subsidiary standards
CSA-C22.2, No. 14-M91 Industrial Control Equipment, September 1991
IEC61000-4 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
C37.90-89 IEEE Standard for Relays and Relay Systems Associated with Electrical Power Apparatus
C37.90.1-89 IEEE Standard Surge Withstand Capability (SWC) Tests for Protective Relays and Relay Systems
Standard for Withstand Capability of Relay Systems to Radiated Electromagnetic Interference
C37.90.2-95 IEEE
from Transceivers
IEC60068.2 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.
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 C37.20.7
with ratings up to 50 KA but use two totally different approaches.
For more information, contact Schneider Electric
by phone at 1-888-778-2733, by e-mail at
help@SquareDinfo.com or visit www.schneider-electric.us
©2010 Schneider Electric. All rights reserved.
Schneider Electric USA, Inc.
1415 S. Roselle Road
Palatine, IL 60067
Tel: 847-397-2600
Fax: 847-925-7500
This document has been
www.Schneider-Electric.us printed on recycled paper
6000HO0902 01-10
You can also read
