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4.6.
Connecting the High Voltage Output
Before connecting the HV output cable, inspect the cable and check for signs of damage.
Always use the HV connector and cable provided with the power supply or an equivalent
substitute provided by TDK-Lambda Americas.
The shield of the HV cable or a separate conductor connected between the ground stud on
the unit and the load can be used for the return connection. The Return current must not
flow via the AC power ground! The HV cable shield is always at ground potential.
Suitable overvoltage protection and/or grounding should be used at the load return in case
the return connection to the power supply is disconnected or opened in error.
The HV return is internally connected to Ground inside the power supply via a removable
link. For most applications this connection should not be removed. If required, the Ground
link can be removed, and the HV return must be connected to Ground at the load.
In the event of load arcs or flashovers, the return connector is internally protected by a 350V
spark gap to Ground.
4.6.1.
HV Output Polarity
The High Voltage output polarity should be specified at the time of ordering. Options are
Fixed Positive wrt ground, Negative wrt ground, Reversible, or Floating. The Reversible
option is only available on models rated between 3.5kV and 65kV.
Output polarity is indicated in the part number and by a Blue or Red label on the rear of the
unit. A Red label indicates Positive polarity, a Blue label indicates Negative polarity. Output
polarity is also indicated in the voltage/current displays.
Units with Reversible polarity have a combination Blue/Red label on the rear panel.
4.6.2.
Floating Output
The Floating option is standard on models rated at 2kV or less, and optional for higher
voltage models.
For models rated up to 350V the outputs can float ±500V from ground.
For models rated from 650V to 2kV, the outputs can float ±2kV from ground.
4.6.3.
HV Output Connector
For all PHV models rated at 650V and above, the HV output connector and 9ft cable is
supplied with the unit. For models rated less than 650V, 4mm banana plugs are used and
are widely available. Table 2 shows the output connectors used at the various available
output voltages.
ONLY USE THE HV CONNECTOR AND CABLE SUPPLIED WITH
THIS INSTRUMENT. ENSURE THAT THE POWER SUPPLY IS OFF
AND DISCONNECTED FROM THE AC INPUT POWER AND THAT
ANY LOAD CAPACITORS ARE DISCHARGED AND SHORTED TO
GROUND BEFORE MAKING ANY CONNECTIONS.
HANDLE THE HV CABLE WHILE THE SUPPLY IS OPERATING.
THE HV OUTPUT CONNECTOR CAN ONLY BE OPERATED AT
RATED VOLTAGE WHEN PROPERLY MATED WITH THE UNIT.
83550001 Revision C
14
NEVER
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