Seaward B255 User Manual
Page 33
Operating Manual
Clare B255 Power Tool & Appliance Test Station
29
Check Procedure - Flash Test Trips
With the clip lead still attached across the simulator terminals, select 500v
Flash and depress the Test button. The green Flash PASS lamp should come
on. Release the Test button.
Now select 1250v Flash and depress the Test button. This time the warning
buzzer and the red Flash FAIL lamp should come on continuously. Release the
Test button.
With 1250v Flash still selected, now depress and hold the 10mA TRIP button
and then depress the Test button. This time the green Flash PASS lamp
should come on. Release both buttons.
Detach and put away the Earth Return clip lead and get the safety Flash Probe
out ready for the next check.
Set the test selector to 3000v Flash, depress and hold the Test button and
note that the green Flash PASS lamp comes on.
With the Test button still depressed, apply the tip of the safety Flash Probe to
the HT PROBE test point on the simulator, the warning buzzer and the red
Flash FAIL lamp should come on continuously. Release the Test button.
Set the test selector to 3750v Flash, depress and hold the Test button and
note that the red Flash FAIL lamp comes on.
Interlock functionality test check:
Disconnect Guard Switch from the socket located at the rear panel.
Make sure the output box is plugged into the B255.
Make sure the selector switch is set to Stand By position.
Set-up test as per Earth Continuity - Check Procedure.
Switch B255 on.
Select Earth Continuity test, using the rotary selector switch.
Depress Test button in order to start the test.
Makes sure the test doesn't start and the reading on the scale remains at 0
position.
Only if the above test is successful perform the following test:
Connect Guard Switch link (provided).
Disconnect the output box.
Make sure the selector switch is set to Stand By position.
Switch B255 on.
Select Earth Continuity test, using the rotary selector switch.
Depress Test button in order to start the test.
Makes sure the test doesn't start and the reading on the scale remains at 0
position.
Do not select any other test functionality.
Electric shock risk. Do not touch B255 and Y250 during flash tests.