Speed of Operation Performance Testing
The high speed of operation of the arc fault detection method is an essential characteristic of this
protection technique. Testing the operating performance of the 1S20 Arc Fault Monitor & 1S30
Arc Fault Sensors may be carried out using the as follows:
STEP ONE
Connect up the 1S20 and 1S30 as per the standard wiring diagram.
Activate the 1S30 sensor using a camera flash gun positioned directly in front of the sensor
window and check that the 1S30 trip LED activates. The optical output power of the flash gun will
determine how close it must be positioned. A flash gun with sufficient white light intensity and
duration must be employed. >20,000 Lux and 2ms is recommended.
STEP TWO
Connect up the 1S20, 1S30 with a dropping resistor & storage CRO as per the test diagram.
Activate the 1S30 sensor using a camera flash gun positioned directly in front of the sensor
window and check that the 1S30 trip LED activates.
The operating pulse generated by the 1S30 output should trigger the storage CRO. Using the
CRO time base measure the time taken for the 1S20 output contact to operate.
Repeat this test for each output contact and sensor input combination.
Use camera flash unit
to initiate sensors
1S20 Under Test
1S30 Under Test
Test setup step one
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Due to RMS continuous product improvement policy this information is subject to change without notice. User_Guide-5/Iss D/29/01/08
