B2 HVA28 - System Failure Disconnection Procedure

Disconnection Procedure
© b2 electronic GmbH DHV0086 Rev06 99
In the event of errors or failures due to a loss of power during testing,
additional precaution is required. The HVA red LED light
71
does not indicate
of less than 100V. To guarantee that the residual voltage has dissipated before
removing the test lead, the DUT must be de-energized using a discharge stick.
Steps DSF1-DSF7 describe the disconnection procedure in case of system
failure.
Step Procedure (System failure disconnection)
DSF1 SwitchHVAo󰀨
• Pressemergencyo󰀨button
42
• Turn on key switch
43
too󰀨toandremovekey.
DSF2 • Verify correct functioning of discharge stick.
DSF3 Discharge and earth DUT complying with local safety regulations.
• Discharge DUT using a discharge stick.
DSF4 Before disconnecting test lead, wait until residual voltage has dissipated.
• Required wait time depends on the resistance of the discharge stick.
• Rule of thumb: For standard discharge sticks, wait a minimum of 10 min
DSF5 Disconnect the Test Lead
• Disconnect test lead from DUT
17
.
• Disconnect earth cable from the HV cable shield
2
• Unscrew HV test lead from HVA HV output connector
10
DSF6 • Disconnect power supply cable from power supply plug
30
.
DSF7 Disconnect all earthing cables
• Disconnect earthing cable from DUT earth
3 4
.
• Disconnect earthing cable form HVA earthing connector
1
.