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83488001 Revision N
Currents due to voltage reversal, particularly at high repetition rates
can damage the power supply. Generally, a resistor in series with
the HV output can be added to limit this current to an acceptable
level, but an additional clamp diode may also be required.
Refer to Application Note 517 (available from the factory or at
http://www.us.tdk-lambda.com/hp/product_html/high_volt.htm) for
more detailed information.
Dress the high voltage cable to create a gentle curve ensuring there are no sharp bends as
this will tend to reduce the cable's insulation strength. Strain relieve the load end of the high
voltage cable to prevent breaking of, or damage to the center conductor. Keep the HV
cables as distant as possible from the input power and the control signals.
To connect the HV cable to the load it is necessary to remove the cable jacket, shield, and
any semiconducting layer (if applicable) that remains on the cable insulation after removing
the shield.
The cable outer jacket should be
removed to reveal the cable shield. At least 12” or 300mm
of outer jacket should be removed for suitable voltage hold-off. The exposed shield should
be trimmed to an appropriate length and terminated with a ground connection.
For models shipped with DS2214 HV cable (>40kV rated voltage), after the shield is
removed, the black semiconducting layer is exposed. This layer should be very carefully
removed using a sharp craft knife, and a peeling action. Once the semiconducting layer is
removed, the exposed EPR insulation should be cleaned with IPA or an equivalent solvent. If
any of the semiconducting layer remains on the HV cable insulation it may cause the cable
termination to fail.
For models shipped with the DS2124 HV cable (<40kV rated voltage), there is no
semiconducting layer to be removed from the cable insulation, however the exposed
polythene cable insulation should be cleaned with IPA.
Summary of Contents for 802 Series
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