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POTENTIAL LETHAL VOLTAGE
y Ensure that the power supply is off and disconnected from the input power and
never operate the power supply without a load cap. Make sure that all load
capacitors are discharged and shorted to ground before making any connections.
Lambda EMI recommends the use of safety dump switches in high voltage
discharge circuits.
y Never handle the HV cable during operation.
y This power supply is designed to operate with a capacitive load. Operation of the
power supply without an external load capacitor may result in damage to internal
circuitry.
Always use the HV connector and cable provided with the power supply or an equivalent
substitute provided by EMI. Fully insert the connector end of the HV cable and tighten the
locking nut only "hand tight".
NOTE: When operating above 20 kV and 200 Hz rep. rate, ensure
that a silicone grease (such as Dow Corning DC-4) is applied
to the HV cable before insertion into the HV connector.
This displaces the air in the connector and reduces long term
corona effects.
Keep the minimum HV cable bend radius greater than 4 inches (101.6mm) to minimize
stress on the insulation. Keep the HV cable as distant as possible from the input power and
the input control signals.
Some peak current will flow out of the power supply during discharge and return through
the HV return and system chassis. This current comes from voltage reversal in
underdamped systems and from normal discharge of filter and cable capacitance. The path
for this current should not parallel control signal returns since the resulting voltages could
interfere with normal system operation. The currents developed with voltage reversal at
high rep. rates, could damage the power supply. A resistor in series with the HV output can
be added to limit this current to an acceptable level. Refer to Section 5.2, Page 15 for more
information.
The oil-filled HV assembly should not be opened. The oil and components have been
specially cleaned and vacuum impregnated at the factory and the assembly hermetically
sealed. Opening the assembly will compromise performance and void the warranty. Tanks
must only be serviced at Lambda EMI.
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52'8&7
83-493-001 Revision G
3 - 3 Installation