Protection Relays & Controls Arc-Flash Monitoring D0920 ARC DETECTION UNIT Arc Detection Unit Description The D0920 Arc-Flash relay provides a simple and cost effective solution for Arc-Flash monitoring. Two light sensors can be connected directly to one relay. Light Sensors react to light and have a 180º detection zone. Sensors are supplied with 10 or 15 m of cable. 1-2 sensors are recommended per cubicle or drawer. Installation Diagram Features & Benefits Install sensors in line of sight to possible arc faults. FEATURES Compact module BENEFITS Fits into wide range of Arc-Flash applications Trip time <1 ms Limits Arc-Flash damage and risk of injury Two optical sensor cable lengths Point sensors with 10 or 15 m of cable Inputs for two sensors Single Arc-Flash relay can monitor 2 sensors Adjustable light sensitivity Allows operation in bright environments and maximum sensitivity in dark environments Service mode Allows relay and sensor test without tripping system Accessories A Ordering Information ORDERING NUMBER CONTROL POWER D0920.0010 230 V AC +15, -30% D0920.0020 230 V AC +15, -30%, remains powered on after trip ACCESSORIES REQUIREMENT A0033.0010 Detector cable 2 x 0.25 mm2 w/screen. 100 m Optional A0220.0010 Arc Detector V-Type; 10 m cable A0220.0020 Arc Detector V-Type; 15 m cable Required: At least one sensor per monitored zone PGA-1100/D1100 Diode Logic Unit Optional © 2014 Littelfuse Protection Relays & Controls A0220 Light Sensors Line-of-sight light sensor detects an arc as small as 3 kA within a 2-m half-sphere. Available with 10 or 15 m cable. PGA-1100/ D1100 Diode Logic For tripping one circuit breaker with multiple D0920 Relays Specifications Supply Voltage Thyristor Output Sensitivity Number of Sensors Response Time Power Consumption Ambient Temperature Dimensions Certification 230 V AC +15,-30% 325 V DC from charged capacitor, nominal energy 3.5 J Adjustable 2 - 24 klux Max. 2 Less than 1 ms 3.5 VA –25°C to 70°C H 90 mm (3.5”); W 105 mm (4.1”); D 75 mm (3.0”) CE Rev: 4-A-021014 Based on Manual Rev: 0-B-011014