B2 HVA28TD - Disconnection Procedure for System Failure; Glossary and Abbreviations; Glossary of Terms and Abbreviations

7 Disconnection Procedure
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DHV0053 b2 EN
65
Step Procedure (Normal Disconnection)
D6 Disconnect power supply cable from power supply plug (9)
D7 Disconnect Earth
• Disconnect the earthing cable from the HVA earthing connector (10)
• Disconnect the earthing cable from the DUT.
System Failure
In case of errors or failure due to a loss of power during testing, additional
precaution is required. The HVA LED red (3) light cannot indicate when residual
voltage is 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 D 1*-D 7* describe the disconnection procedure in case of system
failure.
Step Procedure (System Failure Disconnection)
D1*
Switch HVA OFF
• Press Emergency OFF (1)
• Turn the HVA main switch (8) off
• Lock HVA in disabled state to prevent against unauthorized use:
Turn Key switch (7) to OFF Position and remove Key
D2*
• Verify correct functioning of discharge stick
D3*
Discharge and earth the DUT complying with local safety regulations
• Discharge DUT using a discharge stick
D4*
Before disconnecting test lead, wait until residual voltage has dissipated.
• Required wait time depends on the resistance of the discharge stick. (A)
• Rule of thumb: For standard discharge sticks, wait a minimum of 20 seconds
afterwards earth the cable immediately.
D5* Disconnect the Test Lead
• Disconnect the test lead from the DUT
• Unscrew the test lead from the HV output connector (11)
D6*
Disconnect power supply cable from power supply plug (9)
D7* Disconnect Earth
• Disconnect the earthing cable from the HVA earthing connector (10)
• Disconnect the earthing cable from the DUT.
A