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5
ORDERING INFORMATION
D0920.
0060
Accessories:
A0033.0010
Point Sensor Cable, shielded 2-wire, 24 AWG (0.2 mm
A0220.0010
Point Sensor, includes 10 m (33 ft) cable
A0220.0020
Point Sensor, includes 15 m (49 ft) cable
PGA-1100
Diode Logic Unit
6
WARRANTY
The D0920 Arc-Detection Unit is warranted to be free from defects in material and workmanship
for a period of 5 years from the date of purchase.
Littelfuse will (at Littelfuse's option) repair, replace, or refund the original purchase price of a
D0920 that is determined by Littelfuse to be defective if it is returned to the factory, freight prepaid,
within the warranty period. This warranty does not apply to repairs required as a result of misuse,
negligence, an accident, improper installation, tampering, or insufficient care. Littelfuse does not
warrant products repaired or modified by non-Littelfuse personnel.
7
PERFORMANCE TEST
Testing of a completed installation can be done with a 100W light bulb or a photo flash. Use an
incandescent lamp as this has light and heat radiation (infrared) that closely matches the sensitivity
characteristic of the point sensor. The point sensor has its maximum sensitivity at a wave length of
850 nm which is in the infrared (invisible) range. In the middle of the visible region of 550 nm the
sensitivity is down to approximately 50%. This means that both light and heat radiation from an
arc contribute to the point sensor current that triggers the D0920.
If a photo flash unit is used it is essential that it is set to the 'MANUAL' mode. If it is used in
'AUTO' mode, the light emission will be dependent on random reflections and will change with the
position from which it is fired.
A test-record form is provided for recording the date and the final results of the performance tests.
The following system tests are to be conducted by qualified personnel:
a) Switch on the supply voltage to the D0920. Ensure that the green POWER LED is on, and
press the RESET button to clear an existing trip.
b) Move the switch to the TEST position. This will allow testing of the D0920 and point sensors
without causing the trip coil to trip. Relay K2 (terminals 11 and 12) will be closed when the D0920
is in test mode.
c) Trip the D0920 by moving a light source close to a point sensor. When a trip occurs, the red
TRIPPED LED will be on. Relay K1 (terminals 9 and 10) will be closed when the D0920 has
tripped.
d) Press the RESET button to reset the D0920. Relay K1 (terminals 9 and 10) will open.
www.littelfuse.com
D0920 Arc-Detection Unit
Arc-Detection Unit
• © 2016 Littelfuse •
Rev. 0-D-070616
2
), 100 m (328 ft)
•
15/18
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