Littelfuse D0920 Series - Manual

Protection Relays & Controls
© 2014 Littelfuse Protection Relays & Controls
D0920 ARC DETECTION UNIT
Arc Detection Unit
Arc-Flash Monitoring
Rev: 4-A-021014
Based on Manual Rev: 0-B-011014
Installation Diagram
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.
Specifications
Supply Voltage 230 V AC +15,-30%
Thyristor Output 325 V DC from charged capacitor, nominal energy 3.5 J
Sensitivity Adjustable 2 - 24 klux
Number of Sensors Max. 2
Response Time Less than 1 ms
Power Consumption 3.5 VA
Ambient Temperature –25°C to 70°C
Dimensions H 90 mm (3.5”); W 105 mm (4.1”); D 75 mm (3.0”)
Certification CE
ORDERING NUMBER CONTROL POWER
D0920.0010 230 V AC +15, -30%
D0920.0020 230 V AC +15, -30%, remains powered on after trip
Ordering Information
FEATURES BENEFITS
Compact module 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
Features & Benefits
ACCESSORIES REQUIREMENT
A0033.0010 Detector cable
2 x 0.25 mm 2 w/screen. 100 m
Optional
A0220.0010 Arc Detector V-Type; 10 m cable Required: At least one
sensor per monitored zone A0220.0020 Arc Detector V-Type; 15 m cable
PGA-1100/D1100 Diode Logic Unit Optional
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
Accessories
A
Install sensors in line
of sight to possible arc faults.