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Summary of Contents for Littelfuse AF0025
- Page 1 Tel: +1-800-832-3873 E-mail: techline@littelfuse.com www.littelfuse.com/AF0025 AF0025 ARC-FLASH RELAY Instruction Manual REVISION 0-A-081523 Copyright © 2023 Littelfuse All rights reserved. Document Number: PM-1431-EN...
- Page 2 Page i AF0025 Arc-Flash Relay REV. 0-A-081523 This page intentionally left blank.
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Page 3: Table Of Contents
APPENDIX B: REDUNDANT TRIP 2.1 General Guidelines ........4 CIRCUIT DESCRIPTION ........22 2.2 Switchgear Protection ........ 4 APPENDIX C: AF0025 REVISION HISTORY ... 23 2.3 Transformer Protection ........4 2.4 Generator Protection ........4 OPTICAL SENSORS ........5 LIST OF FIGURES 3.1 PGA-LS10-01B Photoelectric Point Sensor... - Page 4 Page iii AF0025 Arc-Flash Relay REV. 0-A-081523 This page intentionally left blank.
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Page 5: Key Features
The AF0025 can be used on ac or dc electrical systems and can be powered from a 24 Vdc supply. For all available ordering options, see section 9.7. -
Page 6: List Of Figures 1 Af0025 Top View
Page 2 AF0025 Arc-Flash Relay REV. 0-A-081523 FIGURE 1. AF0025 Top View. -
Page 7: Af0025 Typical Wiring Diagram
Page 3 AF0025 Arc-Flash Relay REV. 0-A-081523 FIGURE 2. AF0025 Typical Wiring Diagram. -
Page 8: Sensor Placement
REV. 0-A-081523 2 SENSOR PLACEMENT 2.3 Transformer Protection The AF0025 can also be used for the protection of transformers. 2.1 General Guidelines Two sensors should be used per transformer to monitor the Optical sensors should have line-of-sight to points being primary and secondary connection terminals. -
Page 9: Optical Sensors
Page 5 AF0025 Arc-Flash Relay REV. 0-A-081523 3 OPTICAL SENSORS The AF0025 has two inputs for optical arc-fault sensors. One sensor type is currently supported: • PGA-LS10-01B Photoelectric Point Sensors with sensor check, 1 m (3.3 ft) cable length Point sensors have LED indication of sensor health and fault location. -
Page 10: Pga-Ls10-01B Photoelectric Point Sensor With Sensor Check
3 kA or more. maximum of 50 m (164 ft). For more information on sensor A built-in LED enables the AF0025 to verify the function of cabling, see Section 5.3.2. the light sensor, wiring, and electronics. If the sensor does not detect the sensor-check LED, a sensor-fail alarm will FIGURE 3. -
Page 11: Pga-Ls10-01B Connection
Page 7 AF0025 Arc-Flash Relay REV. 0-A-081523 3.1.1 PGA-LS10-01B Connection FIGURE 4. PGA-LS10-01B Connection Diagram. -
Page 12: Pga-Ls10-01B Installation
Page 8 AF0025 Arc-Flash Relay REV. 0-A-081523 3.1.2 PGA-LS10-01B Installation The PGA-LS10-01B point sensor includes an adhesive-backed drill template for easy surface or panel-mount installation. FIGURE 5. PGA-LS10-01B Mounting Detail. -
Page 13: Application Examples
Page 9 AF0025 Arc-Flash Relay REV. 0-A-081523 4 APPLICATION EXAMPLES 4.1 Basic scenario: One Sensor – One Circuit Breaker No configuration necessary. Incoming Circuit Breaker Trip Sensor 1 or 2 FIGURE 6. Basic AF0025 Configuration. -
Page 14: Total Clearing Time
5 ms (typical) from when light hits the sensor. This is not the Breaker Operating Time same as the clearing time for the fault. The arc fault will With the AF0025, the dominating time by far is the circuit breaker continue until the current to the fault has stopped flowing, operating time. -
Page 15: Af0025 Outline And Mounting Details
Page 11 AF0025 Arc-Flash Relay REV. 0-A-081523 FIGURE 7. AF0025 Outline and Mounting Details. -
Page 16: Power Supply
AF0025 Arc-Flash Relay REV. 0-A-081523 5.1 Power Supply 5.2.1 ERROR Signal Relay The AF0025 Arc-Flash Relay can be supplied by an auxiliary low voltage supply. 5.1.1 Auxiliary DC Supply Connect a dc supply to terminals 9 and 10, ensuring correct polarity. The supply voltage must be 24 Vdc (range is 18.5 to 30 Vdc). -
Page 17: User Interface
6.1 Reset Button Flashing green Supply voltage is outside the specifications. The RESET button on the front panel of the AF0025 has two functions: A momentary press will reset any trip events or Supply voltage is not connected. errors, and holding the button will initiate additional reset ERROR Relay (Terminals 1 to 3) functions as described below. - Page 18 Fail-safe mode will toggle when the RESET button is released. The sensor is unplugged or faulty, or See Section 6.1. the AF0025 is without power (check the Sensors wiring of the sensor). On, green The sensor input is active and has a functional sensor connected.
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Page 19: Commissioning
A normal AC light bulb can also be The AF0025 is supported through the Littelfuse network of technical used. sales and distributors. For installation help and support, please 7.3 Testing the TRIP Output and... -
Page 20: Specifications
Page 16 AF0025 Arc-Flash Relay REV. 0-A-081523 9 SPECIFICATIONS Trip Time (with 1 ms intentional delay): 9.1 AF0025 Mode: Shunt Trip (non-fail-safe): Supply: ........4 W, 18.5 to 30 Vdc Normally open contact: ..< 5 ms Optical Settings: Normally closed contact: ..< 3 ms External Sensors: .... -
Page 21: Emc Tests
1 MHz Burst ......IEC 61000-4-18 Above 2,000 m (6,500 ft): ..24 Vdc supply only ± 1 kV differential mode (line-to-line) Above 4,000 m (13,000 ft): ..Contact Littelfuse ± 2.5 kV common mode for further information. Voltage Interruption ......IEC 61000-4-29 9.2 EMC Tests... -
Page 22: Safety
Page 18 AF0025 Arc-Flash Relay REV. 0-A-081523 9.4 Safety 9.6 Sensors Safety: ...... EN 61010-1:2010/AMD1:2016/ PGA-LS10-01B COR1:2019 Safety Requirements for Electrical Equipment for Measurement, Control, Type: Point sensor and Laboratory Use – Part I 180 x 360° (half sphere) 9.5 Certification... -
Page 23: Ordering Information
Littelfuse will (at Littelfuse’s option) repair, replace, or refund the original purchase price of an AF0025 that is determined by Littelfuse to be defective if it is returned to the factory, freight prepaid, within the warranty period. -
Page 24: Trip And Error Relays Maximum Switching Capacity
Page 20 AF0025 Arc-Flash Relay REV. 0-A-081523 AC Resistive Load 10.0 DC Resistive Load VOLTAGE, V FIGURE 8. TRIP and ERROR Relays Maximum Switching Capacity. -
Page 25: Appendix A Installation Log Sheet
Page 21 AF0025 Arc-Flash Relay REV. 0-A-081523 APPENDIX A INSTALLATION LOG SHEET GENERAL INSTALLATION SETTINGS DEFAULT UNIT COMMENTS Date Installed Operator Comment 1 Comment 2 GENERAL System Name Description Of This Unit AF0025 Arc-Flash Relay LIGHT SENSORS Common Settings Light Immunity... -
Page 26: Appendix B Redundant Trip Circuit Description
REV. 0-A-081523 APPENDIX B REDUNDANT TRIP CIRCUIT DESCRIPTION The AF0025 includes a redundant trip circuit which is active any time the CPU is not actively monitoring. Two conditions in which the CPU is not actively monitoring are during initialization (approximately 500ms following application of power) and in the extremely rare event that an internal CPU failure is detected. -
Page 27: Manual Revision History
Page 23 AF0025 Arc-Flash Relay REV. 0-A-081523 APPENDIX C AF0025 REVISION HISTORY HARDWARE REVISION MANUAL RELEASE MANUAL REVISION (REVISION NUMBER ON FIRMWARE REVISION DATE PRODUCT LABEL) August 15, 2023 0-A-081523 1.0.1 MANUAL REVISION HISTORY Revision 0-A-081523 Initial release. HARDWARE REVISION HISTORY Hardware Revision 0 Initial release.
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