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Summary of Contents for Littelfuse AF0100
- Page 1 AF0100 ARC-FLASH RELAY APPLICATION GUIDE...
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Page 2: Table Of Contents
2.2.1 Typical Energy in an Arcing Fault 2.2.2 Arc-Flash Relays and PPE 2.2.3 Arc-Flash Relays in Engineering Software Packages 2.3 Electrical Drawings 2.3.1 AF0100 Arc-Flash Relay Back Plate and Sensor Dimensions 2.3.2 Connections 2.3.3 Symbols 3 INSTALLATION 3.1 Block Diagram 3.2 Relay Placement... -
Page 3: Introduction
A USB port is used for configuration. The AF0100 can be used on electrical systems operating at any voltage (AC or DC) since it does not directly connect to the system. The small size of the AF0100 allows installation in any switchgear cubicle, transformer compartment, generator control panel, or motor control center bucket. -
Page 4: Design
However, this is done at the expense of using the fault location features of the AF0100 to determine the location of the arc-flash within those cabinets, not which sensor sees the fault. Sensor types can be combined to further customize the solution. An understanding of the two sensor types and their properties is important for selecting the correct sensors. -
Page 5: Arcing Faults
AF0100 should be adjusted to its instantaneous trip time plus the AF0100 operation time. These times can be found in the AF0100 manual, but vary from 3 ms to 8 ms and with a typical shunt breaker connected to the normally open contact is 5 ms. -
Page 6: Electrical Drawings
AF0100 Arc-Flash Relay APPLICATION GUIDE 2.3 Electrical Drawings SIDE FRONT 2.3.1 AF0100 Arc-Flash Relay Back Plate and Sensor Dimensions 127.6 5.03 (0.38) (0.08) 14.2 16.2 95.2 16.2 (0.56) 0.64 3.75 0.64 (0.09) 23.8 (0.94) 18.8 (0.74) 24.0 (0.94) (0.16) Ø4.25(0.167) Ø4.25(0.167) -
Page 7: Installation
AF0100 Arc-Flash Relay APPLICATION GUIDE 3 INSTALLATION 3.1 Block Diagram Digital I/O Connection to other AF0100 or AF0500 24-48 Vdc PGA-LS10 Supply (Point Sensor) – AF0100 PGA-LS20/ (Arc-Flash Protection Relay) PGA-LS30 (Fiber-Optic Sensor) Unit Healthy Trip 1 Trip 2 100-240 Vac/Vdc Supply 3.2 Relay Placement... -
Page 8: Maximum Distance To Sensors
3.2.2 Maximum Distance to Sensors The maximum length of electrical cable between a PGA-LS10 point sensor and an AF0100 is 50 m. The maximum length of electrical cable between a PGA-LS20/PGA-LS30 fiber-optic sensor and an AF0100 is 50 m to the transmitter module and 50 m to the receiver module. -
Page 9: Redundant Trip Path
APPLICATION GUIDE 3.3 Redundant Trip Path The AF0100 has a secondary solid-state circuit (shunt trip mode only) that provides redundancy in the event of a microprocessor failure. Less often considered, a microprocessor-based relay can take several hundred milliseconds to initialize and reach the state where it is able to detect an arc flash. If the system is de-energized for maintenance (including the AF0100) and then re-energized when the maintenance is complete, this constitutes a risk. -
Page 10: Point Sensor Placement
The PGA-LS10 point sensors can be installed up to 50 m from the AF0100 Arc-Flash relay with standard shielded 3-wire electrical cable. This is a benefit for retrofit applications as electrical cable is more durable and easier to install than a fiber-only installation between sensor and relay. -
Page 11: Fiber-Optic Sensor Placement
SENSOR 2 Transmitter and receiver modules can be SENSOR 1 installed up to 50 m from the AF0100. The PGA-LS20 10m (8m active) fiber should not be in contact with bare PGA-LS30 20m (18m active) conductors but can be run much closer... -
Page 12: Examples
There must be an upstream device to trip. In this example, the transformer does have a breaker that can be opened in case of an arc, but otherwise, the AF0100 would connect to each generator arc-flash relay using its digital I/O to shut down all energy sources to the arc. -
Page 13: Main-Tie-Main Application
This example shows a system utilizing AF0100 and AF0500 relays connected through digital I/O to ensure that the correct breakers trip for each of the three protection zones. -
Page 14: Appendix A: Supporting Materials
AF0100 Arc-Flash Relay APPLICATION GUIDE APPENDIX A: SUPPORTING MATERIALS Littelfuse provides many supporting materials in digital format for the function and installation of the AF0100 Arc-Flash Relay. Manual Brochure Workbook for Estimating Arc-Flash Incident Energy Reduction Datasheet Videos FAQ Booklet Guideform Specifications These can be found at: Littelfuse.com/ArcFlash... - Page 15 AF0100 Arc-Flash Relay APPLICATION GUIDE NOTES © 2018 Littelfuse Products Littelfuse.com/ArcFlash...
- Page 16 Littelfuse.com/ArcFlash Additional technical information and application data for Littelfuse protection relays, generator and engine controls, fuses and other circuit protection and safety products can be found on Littelfuse.com. For questions, contact our Technical Support Group (800-832-3873). Specifications, descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to changes without notice.