SL2KW SERIES MANUAL
21
118088-001 REV C
5.9 EFR - External Fault Relay
The external fault relay option provides a set of customer
accessible relay contacts that are controlled by the fault
status circuitry of the applicable SL Series power supply.
A standard SL power supply will revert to the “Power
Down” mode with a visual front panel indication if any of
the following fault conditions occur:
•
Overvoltage:
Greater than 110% of maximum output
voltage was produced by the power supply.
•
Overcurrent
: Greater than 104% of maximum output
current was produced by the power supply or the AOL
circuitry was activated.
•
Overtemperature:
Excessive temperature has been
sensed within the chassis.
•
Regulation Error:
Lack of required output power to
maintain regulation
•
Arc (Shutdown):
Arc sensing circuit has shut down the
supply due to excessive arcing. With the installation of
the EFR option, if any of these faults occur, a relay will
be activated to provide a remote indication that the power
supply has reverted to the “power down” mode. The
common and normally open or normally closed set of
contacts are provided (jumper selectable). Relay contacts
are rated at 1A at 30Vdc or 0.5A at 48Vac. Connections
on the rear panel 25 pin D connector (J5) can be made as
follows:
J5-12 Relay Common.
J5-13 Normally Open/Normally Closed (jumper
selectable).
Resetting the front panel and EFR relay is accomplished
by depressing the green front panel HV OFF push-button
switch, which reverts the power supply back to the
“Standby” mode. Removal and reapplication of the AC
line input voltage will also reset any fault. The circuitry
and components required for the EFR option are installed
at the factory when this option is ordered.
5.10 FCV – Fine Control Voltage
This option adds a second potentiometer to the front panel
of the unit. This allows for a finer local adjustment of the
output voltage setting.
5.11 IO – Instant On
When the Instant On Option is ordered, the High Voltage
is enabled as soon as line voltage is applied when the
circuit breaker is in the ON position. (See Figure 5.3) To
enable Instant On, keep the jumper between J5-14 and J5-
15 attached. Connect an additional jumper from J5-15 to
J5-16 as shown in Figure 5.3.
The Power Supply will generate programmed
High Voltage whenever the circuit breaker is in
the ON position, and line voltage is applied.
5.12 LL(X) – Lead Length
Extra-long high voltage output cable of standard lengths
of20, 40, 60 and 100 feet can be provided. Non standard
lengths can be custom ordered.
5.13 NAD – No Arc Detect
This option removes the arc intervention circuitry from
the power supply. Care must be exercised when using
this option as damage to the HV multiplier could occur.
5.14 NSS – No Slow Start
The standard 6 second long linear ramp of output voltage
is removed allowing the high voltage to “step” to its set
point when enabled.
5.15 PN – Positive/Negative
Reversible polarity option. Units that are not inherently
reversible by design (10kV to 50kV) can have their
output polarity reversed by the process of exchanging the
high voltage multiplier section.
Models from 0.5 kV to 8kV:
For units from 0.5 kV to 8kV, the polarity may be
reversed in the field via an internal wiring change by
following the procedures shown in Figure 5.1.
Models from 10kV to 130kV:
When this option is ordered, a second multiplier is
provided to permit the user to replace the existing
multiplier with another of reverse polarity. See Figure
5.2 for a step by step procedure.
5.16 RFR – Remote Fault Reset
This option provides the ability to reset any power supply
faults that might occur via toggling a signal on the rear
panel interface.
CAUTION
