Spellman SL2KW SERIES Instruction Manual

R

Instruction Manual

SL2KW SERIES

MODEL :
SERIAL# :
DATE :

SPELLMAN
HIGH VOLTAGE ELECTRONICS
CORPORATION

One Commerce Park
Valhalla, New York, 10595

[phone]* FAX: [phone]*
E-mail: [e-mail]
Website: www.spellmanhv.com

High Voltage Power Supply

SL2KW MANUAL 118087-001 Rev A

IMPORTANT SAFETY PRECAUTIONS

SAFETY

THIS POWER SUPPLY GENERATES VOLTAGES THAT ARE DANGEROUS AND MAY BE FATAL.

OBSERVE EXTREME CAUTION WHEN WORKING WITH THIS EQUIPMENT.

High voltage power supplies must always be grounded.

Do not touch connections unless the equipment is off and the

Capacitance of both the load and power supply is discharged.

Allow five minutes for discharge of internal capacitance of the power supply.

Do not ground yourself or work under wet or damp conditions.

SERVICING SAFETY

.

Maintenance may require removing the instrument cover with the power on.

Servicing should be done by qualified personnel aware of the electrical hazards.

WARNING note in the text call attention to hazards in operation of these units

that could lead to possible injury or death.

CAUTION notes in the text indicate procedures to be followed to avoid possible

damage to equipment.

Copyright © 2000, Spellman High Voltage Electronics Corporation. All Rights Reserved.

This information contained in this publication is derived in part from proprietary and patent data. This information has

been prepared for the express purpose of assisting operating and maintenance personnel in the efficient use of the

model described herein, and publication of this information does not convey any right to reproduce it or to use it for

any purpose other than in connection with installation, operation, and maintenance of the equipment described.

118004-001 REV. B

WICHTIGE SICHERHEITSHINWEISE

SICHERHEIT

DIESES HOCHSPANNUNGSNETZTEIL ERZEUGT LEBENSGEFÄHRLICHE HOCHSPANNUNG.

SEIN SIE SEHR VORSICHTIG BEI DER ARBEIT MIT DIESEM GERÄT.

Das Hochspannungsnetzteil muß immer geerdet sein.

Berühren Sie die Stecker des Netzteiles nur, wenn das Gerät ausgeschaltet ist und die elektrischen

Kapazitäten des Netzteiles und der angeschlossenen Last entladen sind.

Die internen Kapazitäten des Hochspannungsnetzteiles benötigen ca. 5 Minuten, um sich zu entladen.

Erden Sie sich nicht, und arbeiten Sie nicht in feuchter oder nasser Umgebung.

SERVICESICHERHEIT

Notwendige Reparaturen können es erforderlich machen, den Gehäusedeckel während des Betriebes zu

entfernen.

Reparaturen dürfen nur von qualifiziertem, eingewiesenem Personal ausgeführt werden.

“WARNING” im folgenden Text weist auf gefährliche Operationen hin, die zu Verletzungen oder zum Tod

führen können.

“CAUTION” im folgenden Text weist auf Prozeduren hin, die genauestens befolgt werden müssen, um

eventuelle Beschädigungen des Gerätes zu vermeiden.

118004-001 REV. B

PRECAUTIONS IMPORTANTES POUR VOTRE SECURITE

CONSIGNES DE SÉCURITÉ

CETTE ALIMENTATION GÉNÈRE DES TENSIONS QUI SONT DANGEUREUSES ET PEUVENT ÊTRE FATALES.

OYEZ EXTRÊMENT VIGILANTS LORSQUE VOUS UTILISEZ CET ÉQUIPEMENT.

S

Les alimentations haute tension doivent toujours être mises à la masse.

Ne touchez pas les connectiques sans que l’équipement soit éteint et que la capacité à la fois de la charge et de

l’alimentation soient déchargées.

Prévoyez 5 minutes pour la décharge de la capacité interne de l’alimentation.

Ne vous mettez pas à la masse, ou ne travaillez pas sous conditions mouillées ou humides.

CONSIGNES DE SÉCURITÉ EN CAS DE REPARATION

La maintenance peut nécessiter l’enlèvement du couvercle lorsque l’alimentation est encore allumée.

Les réparations doivent être effectuées par une personne qualifiée et connaissant les risques électriques.

Dans le manuel, les notes marquées « WARNING » attire l’attention sur les risques lors de la manipulation de ces

équipements, qui peuvent entrainer de possibles blessures voire la mort.

Dans le manuel, les notes marquées « CAUTION » indiquent les procédures qui doivent être suivies afin d’éviter

d’éventuels dommages sur l’équipement.

118004-001 REV. B

IMPORTANTI PRECAUZIONI DI SICUREZZA

SICUREZZA

QUESTO ALIMENTATORE GENERA TENSIONI CHE SONO PERICOLOSE E

POTREBBERO ESSERE MORTALI.

PONI ESTREMA CAUTELA QUANDO OPERI CON QUESO APPARECCHIO.

Gli alimentatori ad alta tensione devono sempre essere collegati ad un impianto di terra.

Non toccare le connessioni a meno che l’apparecchio sia stato spento e la capacità interna

del carico e dell’alimentatore stesso siano scariche.

Attendere cinque minuti per permettere la scarica della capacità interna dell’alimentatore

ad alta tensione.

Non mettere a terra il proprio corpo oppure operare in ambienti bagnati o saturi d’umidità.

SICUREZZA NELLA MANUTENZIONE.

Manutenzione potrebbe essere richiesta, rimuovendo la copertura con apparecchio

acceso.

La manutenzione deve essere svolta da personale qualificato, coscio dei rischi elettrici.

Attenzione alle AVVERTENZE contenute nel manuale, che richiamano all’attenzione ai

rischi quando si opera con tali unità e che potrebbero causare possibili ferite o morte.

Le note di CAUTELA contenute nel manuale, indicano le procedure da seguire per evitare

possibili danni all’apparecchio.

118004-001 REV. B

Table of Contents

1. INTRODUCTION

1.1 Description of the SL2KW Series........................................................................1

1.2 Standard Features.................................................................................................2

1.2.1 Remote Operating Features ..................................................................2

1.2.2 System Status and Fault Diagnostic Display........................................2

1.3 Options.................................................................................................................3

1.4 Interpreting the Model Number...........................................................................4

2. INSPECTION & INSTALLATION

2.1 Initial Inspection..................................................................................................5

2.2 Mechanical Installation........................................................................................5

3. OPERATING INSTRUCTIONS

3.1 Operation .............................................................................................................7

3.2 Standard Features.................................................................................................8

PAGE

4. PRINCIPLES OF OPERATION

4.1 Chassis .................................................................................................................17

4.2 Line Rectification and Filtering...........................................................................17

4.3 Inverter.................................................................................................................18

4.4 High Voltage Transformer...................................................................................18

4.5 High Voltage Assembly.......................................................................................18

4.6 Control/Power PWB ............................................................................................19

4.7 Front Panel Assembly..........................................................................................19

4.8 Options.................................................................................................................19

5. OPTIONS

5.1 Adjustable Overload Trip ....................................................................................20

5.2 Adjustable Power Trip.........................................................................................20

5.3 Arc Sense.............................................................................................................20

5.4 Arc Trip................................................................................................................20

5.5 Bipolar Master/Slave ...........................................................................................20

5.6 Current Mode Select............................................................................................20

5.7 Constant Power Control.......................................................................................20

5.8 Digital Panel Meter, 4.5 Digits............................................................................20

SL2KW SERIES MANUAL I 118088-001 REV C

5.9 External Fault Relay ............................................................................................21

5.10 Fine Control Voltage ...........................................................................................21

5.11. Instant On.............................................................................................................21

5.12 Lead Length.........................................................................................................21

5.13 No Arc Detect......................................................................................................21

5.14 No Slow Start.......................................................................................................21

5.15 Positive/Negative.................................................................................................21

5.16 Remote Fault Reset..............................................................................................21

5.17 Remote Over Voltage ..........................................................................................22

5.18 Slides....................................................................................................................22

5.19 Slow Start.............................................................................................................22

5.20 Custom Design Models........................................................................................22

6. MAINTENANCE

6.1 Periodic Servicing................................................................................................24

6.2 Performance Test.................................................................................................24

6.3 High Voltage Dividers.........................................................................................24

7. REPLACEMENT PARTS

7.1 Replacement Parts................................................................................................25

7.2 Correspondence and Ordering Spare Parts..........................................................25

8. FACTORY SERVICE

8.1 Warranty Repairs.................................................................................................26

8.2 Factory Service Procedures .................................................................................26

8.3 Ordering Options and Modifications...................................................................26

8.4 Shipping Instructions...........................................................................................26

SL2KW SERIES MANUAL II 118088-001 REV C

LIST OF FIGURES

Figure 2.1 SL Series Dimensions.................................................................................6

Figure 3.1 SL Series Typical Operating Set Up...........................................................10

Figure 3.2A Wiring Diagram for Remote Programming via Voltage Source ................12

Figure 3.2B Wiring Diagram for Remote Programming via External Resistance..........12

Figure 3.3 Remote Monitor Test Point Designations...................................................13

Figure 3.4 Remote Control of High Voltage On and Off ............................................13

Figure 3.5 External Inhibit Interface Circuit................................................................14

Figure 3.6 External Interlock Interface Circuit............................................................14

Figure 3.7 Remote High Voltage On and Remote High Voltage off Indicator Circuit.... 15

Figure 3.8 Remote Indicators Interface............................................................................ 16

Figure 5.1 Polarity Reversal Procedures, 1kV to 8kV ..................................................... 22

Figure 5.2 Polarity Reversal Procedures 10kV to 50kV .................................................. 22

Figure 5.3 Instant On Option............................................................................................23

Figure 5.4 Bipolar Master/Slave Option......................................................................23

LIST OF TABLES

Table 1.1 SL2KW Options..........................................................................................3

Table 3.1 Rear Panel Interface 25 pin Mini D............................................................11

Table 4.1 List of Main Assemblies.............................................................................18

APPENDIX

A. Specification Controls (Custom Models Only)

SL2KW SERIES MA NUAL III 118088-001 REV C

Chapter 1

INTRODUCTION

1.1 Description Of The SL2KW
Series

he SL2KW Series of high voltage power supplies
provides very well regulated, low ripple high voltage

T

in a highly efficient, compact design. The
improvements in size and performance over traditionally
designed high voltage power supplies are due to the
resonant topology and unique control circuitry of the
SL2KW design. A proprietary control system maintains
high frequency over the operating output range. The
combination of proprietary control system and proprietary
protection circuitry enables the supplies to operate under
arcing and extreme transient conditions without damage
or interruptions.

The DC output voltage and current are continuously
adjustable from zero to the maximum rating via two front
panel ten-turn locking potentiometers.

Custom designed units to meet special needs are also
available.

SL2KW SERIES MANUAL 1 118088-001 REV C

1.2 Standard Features

The SL2KW Series incorporates several standard features
designed to optimize user satisfaction and safety.

 SLOW START: This feature provides a gradual

increase in high voltage until the preset operating

point is reached. The slow start time is factory set

for 6 seconds. Other slow start times are available as

an option.
 ARC DETECT / ARC QUENCH / ARC COUNT:

These features allow the user to tailor the power

supply to meet specific needs in dynamic load

applications. If an arc occurs, the output is inhibited

for approximately one second, then the output is

ramped up to the preset level with the slow-start

circuitry. See Chapter 3 for operating details and

information for user customization of these features.
 INTERNAL FAULT PROTECTION: The SL

Series continually monitors internal circuits critical to

the proper operation of the power supply. In the

event that one of these circuits does not function

correctly, the fault detection circuit latches the

appropriate fault on the front panel display and turns

off the output and reverts the unit to the POWER

DOWN mode.
 INDICATOR LAMPS: LINE POWER, HIGH

VOLTAGE OFF AND HIGH VOLTAGE ON

indicators.
 OUTPUT CABLE: All models are provided with a

ten foot shielded high voltage output cable. The

cables are designed with a plug arrangement so that

they can be easily removed from the mating

receptacle located on the rear of the chassis.

1.2.1 Remote Operating Features

 EXTERNAL INHIBIT: A control signal that will

inhibit the high voltage output is provided on the
external interface. A logic low, ground, will inhibit
the high voltage output an d a logic high, open, will
restore the high voltage output to the preset level.

NOTE: The External Inhibit circuit should NOT be used

for protection against injury or for safety interlock.
See External Interlock for this type of safety control.

 EXTERNAL INTERLOCK: Interlock connections

are provided on the external interface on the rear of
the chassis for connection to a safety switch. The
unit will not operate unless the interlock circuit is
closed. During high voltage operation, opening the
interlock circuit will cause the High Voltage to shut
off. This circuit should be used for safety interlock
circuits.

1.2.2 System Status and Fault
Diagnostic Display

“Dead Front” type indictors are provided to give the user
complete indication of system operation and fault
conditions. If a fault occurs, the power supply will revert
to the POWER DOWN mode. This is indicated by both
the HV ON and HV OFF lamps turning off. To reset,
depress the HV OFF switch.

 VOLTAGE (CONTROL): Indicates the output

voltage regulator circuit is maintaining voltage
regulation.

 CURRENT (CONTROL): Indicates the output

current regulator circuit is maintaining current
regulation.

 HV INHIBIT: Indicates that the high voltage

supply is being inhibited by either the EXTERNAL
INHIBIT or internal protection circuitry.

 REMOTE PROGRAMMING: Allows remote

adjustment of the output voltage and current via an
external voltage source.

 REMOTE MONITOR: Allows remote monitoring

of the output voltage and current.

 REMOTE HIGH VOLTAGE CONTROL:

Allows remote control of HIGH VOLTAGE ON and
HIGH VOLTAGE OFF. Signals are also provided
for remote indication of HV ON or HV OFF status.

SL2KW SERIES MANUAL 2 118088-001 REV C

 INTLK CLSD: Indicates the EXTERNAL

INTERLOCK connections are in the closed position.
This also indicates closure of internal power supply
interlocks.

 INTKL OPEN: Indicates the EXTERNAL

INTERLOCK connections are in the open position.
This also indicates opening of internal power supply
interlocks.

 OVERVOLT: Indicates the overvoltage protection

circuitry has caused the power supply to turn off.
Overvoltage protection is internally set to 110% of
the rated output voltage.

 OVERCURR: Indicates the output current has

exceeded the programmed current trip level when the
AOL (Adjustable Overload Trip) or the OL
(Overload Trip) options are installed.

 ARC: Indicates that an arc has occurred within the

previous one second or that the ARC COUNT/TRIP
has shutdown the power supply.

 RGLT ERR: Indicates a failure in the voltage,

current or power regulation circuitry. This fault
usually occurs when there is a lack of output power
to maintain regulation.

The options available are listed in Table 1.1. See Section
5 for more information on these options along with
operating and set-up instructions. With few exceptions,
these options and modifications can be retrofitted to your
power supply at the factory in a short time. For price and
retrofit arrangements, contact the Spellman Sales
Department.

1.3 Options

AOL Adjustable Overload Trip (0-103%)

APT Adjustable Power Trip

ARC Arc Sense

AT Arc Trip

BPM/BPS Bipolar Master/Slave

CMS Current Mode Select

CPC Constant Power Control

DPM4 Digital Panel Meter

EFR External Fault Relay

FCV Fine Control Voltage

IO Instant On

SL Slides

LL(X) Lead Length

NAD No Arc Detect

NSS No Slow Start

PN Positive/Negative

RFR Remote Fault Reset

ROV Remote Over Voltage

SL Slides

SS(X) Slow Start (X)

Table 1.1 SL2KW Options

SL2KW SERIES MANUAL 3 118088-001 REV C

1.4 Interpreting the Model Number

The model number of the power supply describes its
capabilities. After the series name is:

1. the maximum voltage (in KV).

2. the polarity of the unit: positive (P), negative (N) or

reversible (PN).

3. the maximum output (in watts).

4. the option codes for all options that are included.

Custom units have an X number after the option codes.

SL2KW 30 P 2000 / AOL / X (#)

Series

Name

Maximum

Voltage

Polarity

Maximum

Power

Option

Custom

“X”

Number

SL2KW SERIES MANUAL 4 118088-001 REV C

Chapter 2

INSPECTION & INSTALLATION

nitial inspection and preliminary checkout procedures
are recommended. For safe operation, please follow

I

the step-by-step procedures described in Chapter 3,

Operating Systems.

2.1 Initial Inspection

Inspect the package exterior for evidence of damage due
to handling in transit. Notify the carrier and Spellman
immediately if damage is evident. Do not destroy or
remove any of the packing material used in a damaged
shipment.

After unpacking, inspect the panel and chassis for visible
damage.

Fill out and mail the Warranty Registration card
accompanying the unit. Standard Spellman SL Series

high voltage power supplies and components are covered
by warranty. Custom and special order models (with an
X suffix and the model number) are also covered by
warranty.

2.2 Mechanical Installation

Units in the SL2KW Series have front panel holes for
standard EIA rack mounting. The rack must allow rear
access for cable connections. Units are fully enclosed
and are suitable for bench or table top operation.
Standard unit dimensions are shown in Figure 2.1. It is
strongly recommended to support the chassis by guides or
slides. Slides are available for ease of servicing (SL
option).

SL2KW SERIES MANUAL 5 118088-001 REV C

SL2KW SERIES MANUAL 6 118088-001 REV C

Figure 2.1- SL2KW Dimensions

Chapter 3

OPERATING INSTRUCTIONS

3.1 Operation

WARNING

THIS EQUIPMENT GENERATES DANGEROUS

VOLTAGES THAT MAY BE FATAL.

PROPER GROUNDING OF ALL HIGH VOLTAGE

EQUIPMENT IS ESSENTIAL.

WARNING

BEFORE CONNECTING THE POWER SUPPLY

TO THE AC LINE, FOLLOW THIS STEP BY STEP

PROCEDURE.

DO NOT CONNECT THE POWER SUPPLY TO

THE AC LINE UNTIL STEP H IS REACHED.

Failure to follow these procedures may void the warranty.
A) Insure that the Circuit Breaker is in the OFF position

(0).

B) Check the input voltage rating on the nameplate of

the supply and make certain that this is the rating of
the available power source. Spellman SL2KW Series
units operate on 208Vac Three Phase (220Vac Single
Phase if 220Vac Single Phase is ordered).

C) PROPER GROUNDING TECHNIQUES: The

chassis of high voltage power supplies must be
grounded, preferably to a water system ground using
copper pipe or other earth ground using the ground
stud B1 at the rear of the unit. See Figure 3.1 for a
typical operating set-up.

The return line from the load should be connected to
the ground stud, on the rear of the power supply.
Using a separate external ground at the load is not
recommended.

D) Attach the output cable to the load.

E) Plug the high-voltage output cable provided with the

unit into the rear of the supply and hand tighten the
knurled collar.

F) OPTIONS NOTE: See Section 5 for hook-up and

operating instructions for the options on your unit.
Custom models may also require set-up changes.

G) For initial turn-on, rotate the KILOVOLT control

fully counter-clockwise to the zero voltage position.

H) The input power cable may now be connected to the

AC power line.

I) Switch the front panel circuit breaker to the ON

position (1). (If the supply is to be turned off for an
extensive period of time, the line cord should be
disconnected). The unit is now in the HIGH
VOLTAGE OFF mode. The HIGH VOLTAGE OFF
light should be lit.

J) Depress and hold the HIGH VOLTAGE OFF switch.

The front panel meters will now read the preset value
of the KILOVOLT control dial and the
MILLIAMPERES control dial. To preset the desired
level of current and voltage during operation, hold in
the HIGH VOLTAGE OFF switch and rotate the
appropriate control dial while noting its
corresponding meter reading. Release the HIGH
VOLTAGE OFF switch.

NOTE: No actual output is being produced at this stage.
K) Depress the HIGH VOLTAGE ON switch. The light

inside the switch should light up and the output will
slow start to the preset level output voltage and/or
output current.

NOTE: The SL2KW Series is equipped with a slow start

circuit that ramps the output up to its maximum
setting in approximately 6 seconds after the HIGH
VOLTAGE ON switch is depressed.

L) To terminate the generation of output power, depress

the HIGH VOLTAGE OFF switch. In the HIGH
VOLTAGE OFF mode the power supply’s fault and
interface circuits are still active.

SL2KW SERIES MANUAL 7 118088-001 REV C

M) To turn off the power supply, turn the circuit breaker

to the off position (0).

referenced to the power supplies signal ground on the rear
external interface.

NOTE: If a power supply fault, or system
monitoring fault occurs, the power supply will revert
to the POWER DOWN mode. In this mode the
output power will be turned off. The HV OFF lamp
will be off. To reset, depress the HV OFF switch.

AFTER TURNOFF, DO NOT HANDLE THE LOAD

UNTIL THE CAPACITANCE HAS BEEN

LOAD CAPACITANCE MAY BE DISCHARGED BY

SHORTING TO GROUND.

THE VOLTMETER ON THE POWER SUPPLY

FRONT PANEL DOES NOT READ THE OUTPUT

VOLTAGE WHEN THE POWER IS TURNED OFF,

EVEN IF A CHARGE STILL

EXISTS ON THE LOAD.

ALWAYS OPERATE THE UNIT WITH THE COVER

A fan maintains safe operating temperature in the power
supply by drawing air over the circuit components. The
cover must be on in order to direct the air flow over the
areas that need cooling. In operation, the unit must be
placed so that the air intake and the fan exhaust are clear
of obstructions that might impede the flow of air.

WARNING

DISCHARGED!

WARNING

CAUTION

ON.

3.2 Standard Features

A note on remote interface circuitry and remote signal
grounding. Whenever possible, electrical isolation should
be provided when interfacing with any high voltage
power supply. For power control signals such as
EXTERNAL INTERLOCK, HIGH VOLTAGE OFF,
AND HIGH VOLTAGE ON, isolated relay contacts
should be used. For status signals and control signals
such as HIGH VOLTAGE ON, HIGH VOLTAGE OFF,
and EXTERNAL INHIBIT, etc., opto-isolation should be
used. If possible, analog programming and monitoring
signals should be isolated via analog isolation amplifiers.
Spellman application engineers are available to assist in
interface circuitry design. All interface cables should be
properly shielded. All power supply signals should be

 REMOTE PROGRAMMING: Allows remote

adjustment of the output voltage and current via an
external voltage source. In local control (front panel
control), jumpers are installed on the external
interface J5 in the rear of the chassis between J5-10
and J5-11 for voltage control and between J5-8 and
J5-9 for current control.

For remote programming, the jumpers are removed and a
positive voltage source, from 0V to 10 V, is applied to the
appropriate terminals. Programming signals should be
referenced to J5-1, signal ground. By adjusting the
voltage source from 0V (zero output) to 10V (full rated
output), the desired output can be selected. See Figure

3.2A for the wiring diagram and specifications.

An alternate method of controlling the output remotely is
by using external resistance, such as a potentiometer or a
resistor network. For remote control the jumpers are
removed and the desired register configuration installed.
See Figure 3.2B for the wiring diagram.

 REMOTE MONITOR: Test points are made

available at the 25 pin D connector on the rear of the
chassis for monitoring the voltage and current output.
The test points are always positive regardless of the
output polarity where 0V to 10V equals 0 to 100% of
the output 0.5%. Test points have an output
impedance of 5K ohms. See Figure 3.3 for the test
point designation.

 REMOTE CONTROL: Remote control of the

HIGH VOLTAGE ON and HIGH VOLTAGE OFF
can be accomplished via the rear panel interface.
HIGH VOLTAGE OFF and HIGH VOLTAGE ON
can be controlled by momentary normally closed and
normally open contacts respectively. See Figure 3.4
on page 14 for the recommended interface.

 EXTERNAL INHIBIT: Allows the user to inhibit

the power supply output without switching HIGH
VOLTAGE OFF control. This circuit can be used to
generate fast slewing output waveforms or control of
high voltage generation as in Laser and Capacitor
discharge applications. The maximum inhibit rate
should not exceed 5Hz. Consult the factory for
higher repetition rates or high pulse load
applications. See Figure 3.5 for the recommended
interface circuit.

SL2KW SERIES MANUAL 8 118088-001 REV C

WARNING

IT IS EXTREMELY DANGEROUS TO USE THIS

INHIBIT CIRCUIT TO INHIBIT HIGH VOLTAGE

GENERATION FOR THE PURPOSE OF

SERVICING OR APPROACHING ANY AREA OR

LOAD CONSIDERED UNSAFE DURING NORMAL

USE.

 EXTERNAL INTERLOCK: Interlock connections

are provided on the terminal block J5-3 and J5-4 on
the rear of the chassis for connection to a safety
switch. The unit will not operate unless the interlock
circuit is closed. If the interlock is not being used,
the jumper installed on the terminals before shipping
must be in place. If the jumper is missing, or there is
an opening between the interlock terminals, the unit’s
high voltage inverter will be disabled. During high
voltage operation, revert to the HIGH VOLTAGE
OFF mode. Subsequent closing of the interlock
circuit will NOT return the unit to the HIGH
VOLTAGE ON mode. This must be accomplished
by depressing the HIGH VOLTAGE ON switch. See
Figure 3.6 for the recommended interface circuit

 ARC DETECT / ARC QUENCH / ARC COUNT:

The ARC DETECT circuit senses dynamic arcing or
discharge conditions present at the output load. If an
arc occurs, the output is inhibited for .5 seconds.
After the .5 second period, the output is ramped up to
the previous set level. This ramp is based on the

standard six second slow start feature. The ARC
DETECT ramp circuit may be disabled by removing
CR32 on the Control/Power Pwb. Caution should be
observed if this feature is disabled. Discharge rates
of greater then 1Hz may cause excessive power
dissipation in the power supply’s output limiting
resistors.

The ARC COUNT feature will allow the user to program
the ARC fault parameters. The ARC indicator on the
front panel will illuminate for approximately one second
after each arc has occurred. The power supply can be
programmed to trip the POWER DOWN mode if an arc
occurs.

The standard feature is programmed to trip the power
supply if 8 arcs occur within a twenty second period.

 REMOTE HIGH VOLTAGE ON & REMOTE

HIGH VOLTAGE OFF: Signals are provided for

remote monitoring of the HIGH VOLTAGE
ON/OFF status. See Figure 3.7 for recommended
interface.

 REMOTE MODE INDICATORS: Signals are

provided for remote indication of the control mode
status, voltage control, current control, and power
control. See Figure 3.8 for the recommended
interface.

SL2KW SERIES MANUAL 9 118088-001 REV C

SPELLMAN

HIGH VOLTAGE ELECTRONICS CORP
HAUPPAUGE, NY 11788 MADE IN USA

PART NO.:
MODEL:

SERIAL NO.:
OUTPUT:
INPUT:

High Voltage Output

REAR PANEL

It is recommended to connect the load return
directly to the ground stud located
on the rear of the high voltage power supply.

High

Voltage

Load

Shielded High Voltage

Figure 3.1- Typical Operating Setup

SL2KW SERIES MANUAL 10 118088-001 REV C

J5 SIGNAL SIGNAL PARAMETERS

1 Power Supply Common Signal Ground
2 External Inhibit Ground = Inhibit, Open = HV ON
3 External Interlock +15V at Open, <15mA at Closed
4 External Interlock Return Return For Interlock
5 Current Monitor 0 to 10V = 0 to 100% Rated Output
6 kV Test Point 0 to 10V = 0 to 100% Rated Output
7 +10V Reference +10V, 1mA Max
8 Remote Current Program In 0 to 10V = 0 to 100% Rated Output
9 Local Current Program Out Front Panel Program Voltage
10 Remote Voltage Program In 0 to 10V = 0 to 100% Rated Output
11 Local Voltage Program Out Front Panel Program Voltage
12 EFR (Common) Optional External Fault Relay

13 EFR (Normally Open / Closed)
14 Local HV Off Out +15V at Open, < 25mA at Closed.

Connect to HV OFF For FP Operation

15 HV OFF
16 Remote HV ON +15V, 10mA Max = HV ON
17 Remote HV OFF Indicator 0 = HV ON, +15V, 10mA Max = HV OFF
18 Remote HV ON Indicator 0 = HV OFF, +15V, 10mA Max = HV ON
19 Remote Voltage Mode Open Collector 50V Max, 10mA Max On = Active
20 Remote Current Mode Open Collector 50V Max, 10mA Max On = Active
21 Remote Power Mode Open Collector 50V Max, 10mA Max On = Active
22 Remote PS Fault 0 = Fault, +15V, 0.1 mA Max = No Fault
23 +15V Output +15V, 100mA Max
24 Power Supply Common Signal Ground
25 Shield Return Chassis Ground

Table 3.1 - Rear Panel Interface 25 pin Mini D

SL2KW SERIES MANUAL 11 118088-001 REV C

Voltage Source 0-10V = 0-100% of Rated Output

It is recommended that analog signals be isolated via
isolation amplifiers.

All cables should be shielded
with the shield being returned to the chassis ground
of the High Voltage Power Supply.

Remove jumpers for
remote programing

Figure 3.2A – Wiring Diagram for Remote Programming via Voltage

J5

1

2

3

4

5

6

7

8

9

10

11

PS Common

-

V

+

Z in = 10M ohm

Z in = 10M ohm

Remote
Current
Program

V

+

-

Remote
Voltage
Program

Fully Counterclockwise = Zero Output
Fully Clockwise = 100% of Rated Output

All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.
If connections to external potentiometers are
excessively long (>10ft), motorized
potentiometers are recommended.

Remove jumpers for
remote programing

Figure 3.2B – Wiring Diagram for Remote Programming via External

J5

1

2

3

4

5

6

7

8

9

10

11

PS Common

20k ohm

+10.32V

1mA max.

Z in = 10M ohm

Z in = 10M ohm

CW

20k ohm

Remote
Current
Control

Remote
Voltage
Control

CW

SL2KW SERIES MANUAL 12 118088-001 REV C

J5

It is recommended that analog signals be isolated via
isolation amplifiers.

All cables should be shielded
with the shield being returned to the chassis ground
of the high voltage power supply.

Figure 3.3 – Remote Monitor Test Point Designations

S1 must be closed to enable HIGH VOLTAGE.

Momentary closure of S2 will enable HIGH
VOLTAGE ON.

Opening S1 will disable HIGH VOLTAGE ON and
switch the unit to the HIGH VOLTAGE OFF mode.

PS Common

1

2

3

4

­M

Current
Monitor

M

-

Voltage
Monitor

+

5

Z out = 4.99k ohms ±0.1%

6

Z out = 4.99k ohms ±0.1%

7

It is recommended to use relay contacts

for S1 and S2. Relays should be located
as close as possible to the high voltage
power supply. Coils should be driven
from isolated sources. Signals are at
15Vdc, 25mA max., and are only to be
used for contact closure.

+

J5

S1

Remove jumpers for
remote programing

All cables should be shielded
with the shields being returned
to the chassis ground of the
High Voltage Power Supply.

14

15

16

17

S2

Figure 3.4 – Remote Control of High Voltage ON and High Voltage OFF Interface

SL2KW SERIES MANUAL 13 118088-001 REV C

S1 = Remote High
Voltage Off

S2 = Remote High
Voltage On

The transistor should be located as close as possible

to the power supply

All cables should be shielded with the shields
being returned to the chassis ground of the
High Voltage Power Supply.

+15V

2.2k

High Voltage Power
Supply Internal inhibit circuitry.

J5

1

2

3

4

PS Common

Transistor
ON
Inhibits
High
Voltage

Relay contacts are recommended for S1. The relay
should be located as close as possible to the power supply.
Signals are at 15Vdc, 25mA max and are only to be used
for contact closure.

Remove jumper
for remote
external interlock

Figure 3.5 – External Inhibit Interface Circuit

J5

1

2

3

S1

4

5

S1 Open= Interlock Open
S1 Closed= Interlock Closed

External Safety
Interlock Control

All cables should be shielded with the shields being returned
to the chassis ground of the High Voltage Power Supply.

SL2KW SERIES MANUAL 14 118088-001 REV C

Figure 3.6 – External Interlock Interface

12Vdc lamps or relay coils may replace opto-couplers.
Opto-couplers, lamps or relays should be located as close
as possible to the high voltage power supply.
All cables should be shielded with the shields being returned
to the chassis ground of the High Voltage Power Supply.

J5

PS Common

1

2

3

4

P/O High Voltage
Power Supply

1K

1/4 W

1K

1/4 W

10

11

12

13

14

15

16

17

18

5

General Purpose
Opto-Coupler

6

7

8

9

To High Voltage
OFF Indicator

General Purpose
Opto-Coupler

To High
Voltage

ON
Indicator

R Limit

R Limit

Signals are = 15Vdc, 10mA max.
R Limit must be > 500

Figure 3.7 – Remote High Voltage ON and Remote High Voltage OFF Indicator

SL2KW SERIES MANUAL 15 118088-001 REV C

R1

R2

R3

J5

23

19

20

21

R limit

10mA max.

R limit

10mA max.

R limit

10mA max.

R Limit must be > 1kW
R1-R3=680W 1/4W

Voltage Control

Indicator

Current Control

Indicator

Power Control

Indicator

Figure 3.8 – Remote Mode Indicators Interface

SL2KW SERIES MANUAL 16 118088-001 REV C

Chapter 4

PRINCIPLES OF OPERATION

The SL2KW Series of high voltage power supplies
utilizes sophisticated power conversion technology. A
variety of analog, digital and power conversion
techniques are used throughout. The intention of the
Principles of Operation is to introduce the basic function
blocks that comprise the SL2KW power supply. For
details on a specific circuit, consult Spellman’s
Engineering Department.

See Table 4.1 for a list of the main assemblies found in a
typical SL2KW power supply.

 Due to the many variations within the SL2KW

Series, drawing numbers may differ from unit to unit.

The SL2KW power supply is basically an AC to DC
power converter. Within the power supply, conversions
of AC to DC then to high frequency AC, then to high
voltage DC take place. By reviewing further the sub­assemblies, a basic understanding of the process can be
gained.

4.1 Chassis

The SL2KW is a compact, high efficiency, high voltage
power supply. The power supply can supply up to 2000

watts of DC power. Output voltages of up to 50kV can
be generated.

The energy levels used and generated by the
power supply can be lethal! Do not attempt to
operate the power supply unless the user has a
sufficient knowledge of the dangers and hazards
of working with high voltage. Do not attempt to
approach or touch any internal or external
circuits or components that are connected or
have been connected to the power supply. Be
certain to discharge any stored energy that may
be present before and after the power supply is
used. Consult IEEE recommended practices for
safety in high voltage testing #510-1983.

WARNING

4.2 Line Rectification
And Filtering

Basic single phase rectification provides the DC voltage
for the high frequency inverter.

SL2KW SERIES MANUAL 17 118088-001 REV C

ASSEMBLY TITLE ASSEMBLY DRAWING NO. SCHEMATIC DRAWING NO.

J5 J5
SL Chassis (2000W) 403920-003
Control / Power PWB (2000W) 404581-001 440687-001
High Voltage Assy (2000W) 403931-TAB 440534-001
Front Panel PWB 403895-001 440525-001

Table 4.1-List of Main Assemblies

In general, the following variations can be ordered:

 208Vac  10%, 50 to 60Hz, three phase.
 220Vac  10%, 50 to 60Hz, single phase.

If the user is unsure of which input voltage option is
supplied, check the serial tag on the rear of the power
supply or consult Spellman’s Sales Department.

Circuit protection is provided by a front panel circuit
breaker. The circuit breaker is a fast acting magnetic trip
type circuit breaker. The line input is connected directly
to the line side of the circuit breaker whereas the load side
is connected to the CONTROL/POWER PWB. The load
side of the breaker is also connected to a step-down type
line transformer. This transformer provides voltage for
housekeeping and control circuit power.

LINE VOLTAGE IS PRESENT WHENEVER THE

POWER SUPPLY IS CONNECTED TO EXTERNAL

LINE VOLTAGES. BE SURE TO DISCONNECT

THE LINE CORD BEFORE OPENING THE UNIT.

ALLOW 5 MINUTES FOR INTERNAL

CAPACITANCE TO DISCHARGE BEFORE

REMOVING ANY COVER.

When the circuit breaker is ON, voltage is applied to an
isolated diode rectifier bridge, which contains the rectifier
diodes used for line voltage rectification. The output of
this bridge rectifier is connected to a capacitor filter.
Capacitors are initially charged through resistive inrush
limiters.

Approximately 3 seconds after the circuit breaker is
turned on, a relay is energized to short the resistor
limiters. This DC voltage is supplied to the high
frequency inverter.

The DC rails are connected to the high frequency rail
capacitors. These capacitors are high frequency, low loss

WARNING

type, which provides the energy storage for the high
frequency inverter.

4.3 Inverter

The inverter is a series resonant, series/parallel loaded
topology. A proprietary control scheme is used for
regulating the power generated from the inverter. The
switching devices are IGBT’s. These devices provide
high frequency switching to control the resonant current
flow. The typical resonant operating period is
approximately 10 Seconds. The gate control for the
switching devices is provided by the application circuitry
located on the CONTROL/POWER PWB. The
CONTROL/POWER PWB also provides circuitry for
sensing shoot thru and overcurrent conditions in the
inverter.

4.4 High Voltage Transformer

The output of the High Frequency Resonant Inverter is
connected to the primary of the High Voltage
Transformer. The High Voltage Transformer is a set up
type. Typical secondary voltages are in the range of 1kV
to 4.5kV depending upon the output voltage ratings.

4.5 High Voltage Assembly

The High Voltage Assembly will vary depending upon
the model ordered. The circuitry typically consists of a
full wave, full bridge, or full wave doubler for voltage
outputs in the range of 1kV to 8kV. The higher voltage
ranges utilize various parallel, series arrangements of a
full wave voltage doubler.

Output filtering is typically provided by an R-C type
filter. Voltage feedback for regulation and monitoring is
provided by a high bandwidth resistive/cap acitive divid er.
Current feedback for regulation and monitoring is
provided by a sense resistor connected at the low voltage
end of the High Voltage Rectifier/Multiplier Circuit.

SL2KW SERIES MANUAL 18 118088-001 REV C

4.6 Control/Power PWB

The majority of control circuits for power supply controls
are located on the CONTROL/POWER PWB. +15VDC, ­15VDC, and +10VDC is generated on the
CONTROL/POWER PWB. High Voltage On/Off control
is accomplished by K3, and its associated circuitry.
Interlock control is provided by K4.

Voltage feedback from the high voltage divider is sent to
the control board via a mass terminated ribbon cable.
Gain adjustment is provided on the HV PWB. The KV
feedback signal is sent to the front panel DVM and to the
REAR PANEL 25 pin D connector for remote
monitoring. K2 provides switching between feedback
and program signal for the front panel DVM’s. This
allows the user to preset the desired output before
energizing high voltage.

Program voltages are typically ramped up to set level by a
slow start circuit.

An arc sense circuit provides sensing, quench and
indicator of arc conditions. Consult the operation manual
for a detailed description of the arc sense control.

Current feedback from the high voltage rectifier is sent to
sense resistors located on the High Voltage Assembly.
Calibrated feedback is then sent to the applicable circuitry
on the Control/Power Board.

U12 circuit provide visual indication of the control mode,
which is in operation. These signals are sent to the
FRONT PANEL ASSEMBLY for front panel status
indication.

The resonant control circuitry consists of a pulse width
converter. U17 generates all pulse width control signals.

Power supply inhibit circuits are provided by U22 and
K3. System Fault control and Indication is provided by
U19, and associated circuitry. Diagnostic signals are
latched and then sent to the FRONT PANEL
ASSEMBLY for status indication.

4.7 Front Panel Assembly

Front Panel controls, meters and status indications are
connected to the FRONT PANEL PWB. The FRONT
PANEL PWB interfaces directly to the
CONTROL/POWER PWB.

4.8 Options

Due to the many variations of models and options
provided in the SL Series, details of actual circuits used
may differ slightly from the above descriptions. Consult
Spellman’s Engineering Department for questions
regarding the principles of operation for the SL Series.

SL2KW SERIES MANUAL 19 118088-001 REV C

Chapter 5

OPTIONS

he options available for this power supply are
described in this section. Interface diagrams are

T

shown where required. Options are specified by
including the option code in the model number as
described in Section 1.5.

5.1 AOL - Adjustable Overload

Trip

A control board jumper is moved to make the power
supply shut down if it ever operates in current mode.
This allows the user to set the current programming level
as a trip point that will turn the power supply off with an
Over Current fault if it ever tries to operate in Current
Mode.

5.2 APT – Adjustable Power Trip

A third control loop is installed in the power supply, a
power loop. This power loop uses an analog multiplier
chip to multiply the voltage and current feedback signals
to create a power feedback signal. Programming and
feedback scaling is 0- 10Vdc = 0-100% of rated power.
The circuit is configured to trip the power supply off with
an Over Power fault if the power loop ever tries to
regulate.

5.3 ARC – Arc Sense

A signal is provided on a spare pin (TB1-21) that changes
state whenever the power supply detects an arc.

5.4 AT – Arc Trip

A control board jumper is moved such that the first arc
sensed will shut the power supply off with an ARC fault.

5.5 BPM/BPS – Bipolar
Master/Slave

The Bipolar Master/Slave option allows two supplies of
the same voltage rating but opposite polarities to
functions as a single tracking bipolar power supply. The
positive supply is configured as the Master, the negative
supply is configured as the Slave. This is accomplished
by connecting the Voltage Test Point of the positive
(Master) unit to the Voltage Programming of the negative
(Slave) unit. See Figure 5.4. The Master’s voltage
programming signal will provide control of both power
supplies from zero to rated output voltage. The negative
polarity will track the positive polarity within ±1% from
10% to full rated output. Performance specifications are
governed by individual unit characteristics. The two units
must be connected independently to their respective loads
and ground.

5.6 CMS – Current Mode Select

A front panel switch is provided to allow the power
supply to either regulate in current mode or create an over
current fault when operated in current mode, which will
shut down the supply. This is basically a switch
selectable AOL option.

5.7 CPC – Constant Power Control

Identical to the APT Option with the exception the power
supply will run and regulate when the power loop
becomes active.

5.8 DPM4 - Digital Panel Meter, 4.5
Digits

SL2KW SERIES MANUAL 20 118088-001 REV C

The standard 3.5 digit front panel meters are replaced
with 4.5 digit panel meters.

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 th ese 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 J5­15 attached. Connect an additional jumper from J5-15 to
J5-16 as shown in Figure 5.3.

CAUTION

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.

SL2KW SERIES MANUAL 21 118088-001 REV C

5.17 ROV – Remote Over Voltage

The programming signal for the over voltage comparator
circuit is made available to the customer remotely,
allowing the power supply to be set to trip the OVP
circuit anywhere from 0 -110% of rated output voltage.

5.18 SL – Slides

Industry standard rack mounted slides are installed on the
power supply.

5.19 SS(X) – Slow Start(X)

The standard slow start is modified to provide a time of
(X) seconds. Time frames of 0.1 seconds to 120 seconds
can be accommodated.

5.20 Custom Designed Models – X
Numbers

Units built to customer specification are assigned an X
number by the factory. If this unit is an X model, a
specification control sheet is added at the end of the test
of this instruction manual.

Spellman welcomes the opportunity to customize units to
fit your requirements or to develop new products for your
applications. Contact the Spellman Sales Department with
your needs.

SL2KW SERIES MANUAL 22 118088-001 REV C

TURN UNIT OFF, UNPLUG LINE CORD FROM AC OUTLET AND
WAIT FOR 5 MINUTES BEFORE PROCEEDING TO CHANGE THE
HIGH VOLTAGE MULTIPLIER.

1

THAT MOUNT COVER TO CHASSIS AND FRONT PANEL.

2

3

2

LINE

A

PARTIAL VIEW A-A

A

2000 Watt

1kV-8kV chassis

2

3

4

5

LOAD

4

POSITIVE CONFIGURATION
SHOWN

TO THE HIGH VOLTAGE BOARD, AND REMOVE COVER.

FOR POSITIVE POLARITY:
BLACK WIRE ON J4 AND WHITE WIRE ON J5.
FOR NEGATIVE POLARITY:
WHITE WIRE ON J4 AND BLACK WIRE ON J5.

POSITIVE UNITS.

REINSTALL LEXAN COVER AND RELATED HARDWARE.

TURNING UNIT ON.

Figure 5.1 – Polarity Reversal Procedures

2000W, 1kV to 8kV Chassis

4

2

66

A

5

PARTIAL VIEW A-A

A

3

2000 Watt

10kV-50kV chassis

LINE

LOAD

8

POSITIVE CONFIGURATION
SHOWN

TURN UNIT OFF, UNPLUG LINE CORD FROM AC OUTLET AND
WAIT FOR 5 MINUTES BEFORE P ROCEEDING TO CHANGE THE
HIGH VOLTAGE MULTIPLIER.

REMOVE COVER BY UNSCREWING AND REMOVING 12 SCREWS

1

THAT MOUNT COVER TO CHASSIS AND FRONT PANEL.

2

UNPLUG HIGH VOLTAGE LEADS FROM ASSEMBLY.

UNPLUG CABLE FROM JB1 AND REMOVE CABLE SHIELD

3

FROM FASTON TAB ON BOARD.

UNPLUG CONNECTOR FROM JB2.

4

REMOVE 2 SCREWS THAT HOLD THE POLY ETHYLENE

5

ENCLOSURE AND THE BOARD TO THE CHASSIS

CAREFULLY TILT UP A ND SLIDE OUT MULTIPLIER.

6

INSTALL NEW MULTIPLIER BY FOLLOWING STEPS 6 THRU 2 IN

7

REVERSE.

8

CHANGE POSITION OF JP4 JUMPERS ON FRONT PANEL BOARD
TO MATCH POLARITY OF UNIT, i.e 2 JUMPERS MUST BE ON "N"
POSITIONS FOR NEGATIVE UNITS AND ON "P" POSITIONS FOR
POSITIVE UNITS.

INSTALL COVER AND ALL HARDWARE BACK BEFORE TURNING

9

UNIT ON.

SL2KW SERIES MANUAL 23 118088-001 REV C

Figure 5.2 – Polarity Reversal Procedures

2000W, 10kV to 50kV Chassis

Existing jumper

Jumper JB5 15 to 16
for instant ON option

J5

14

15

16

17

P.S.
Common

kV Test

Point OUT

Figure 5.3 – Instant ON

POSITIVE (MASTER)

SUPPLY

J5

1

2

3

4

5

6

7

8

POSITIVE (SLAVE)

SUPPLY

J5

1

2

3

4

5

6

7

8

P.S.
Common

SL2KW SERIES MANUAL 24 118088-001 REV C

9

10

11

10

11

9

Remote Voltage
Program IN

*REMOVE

JUMPER

12

INSTALLATION NOTE

Keep Interconnecting Wires as Short as possible
Use of Twisted Pair or Shielded/Coaxial wire is recommended.

12

Figure 5.4 – Bipolar / Slave Option

LINKING

10-11

Chapter 6

MAINTENANCE

his section describes periodic servicing and
performance testing procedures.

T

WARNING

THIS POWER SUPPLY GENERATES VOLTAGES

THAT ARE DANGEROUS AND MAY BE FATAL .

OBSERVE EXTREME CAUTION WHEN

WORKING WITH HIGH VOLTAGE.

6.1 Periodic Servicing

Approximately once a year (more often in high dust
environments), disconnect the power to the unit and
remove the top cover. Use compressed air to blow dust
out of the inside of the unit. Avoid touching or handling
the high voltage assembly. Be sure that the fans are not
obstructed and spins freely. The fan has sealed bearings
and does not need lubrication. Be sure to replace the top
cover before operating for proper cooling.

6.2 Performance Test

WARNING

HIGH VOLTAGE IS DANGEROUS.

ONLY QUALIFIED PERSONNEL SHOULD

PERFORM THESE TESTS.

High voltage test procedures are described in Bulletin
STP-783, Standard Test Procedures for High Voltage
Power Supplies. Copies can be obtained from the
Spellman Customer Service Department. Test equipment,
including an oscilloscope, a high impedance voltmeter,
and a high voltage divider such as the Spellman HVD­100 or HVD-200, is needed for performance tests. All
test components must be rated for operating voltage.

6.3 High Voltage Dividers

High voltage dividers for precise measurements of output
voltage with an accuracy up to 0.1% are available. An
HVD-100 is used for voltages up to 100KV. An HVD­200 measures up to 200KV. The Spellman divider is
designed for use with differential voltmeters or high
impedance digital voltmeters. The high input impedance
is ideal for measuring high voltage low current sources,
which would be overloaded by traditional lower
impedance dividers.

SL2KW SERIES MANUAL 25 118088-001 REV C

Chapter 7

REPLACEMENT PARTS

7.1 Replacement Parts

Contact the Spellman Customer Service Department for
parts lists for specific models.

Parts and subassemblies for Spellman’s high voltage
power supplies are available. It is recommended that only
qualified personnel perform the repairs. High voltage is
dangerous; even minor mistakes in repairs can have
serious consequences.

When requesting parts please give the model number and
serial number of the power supply.

7.2 Correspondence and Ordering

Spare Parts

Each power supply has an identification label on the rear
of the chassis that bears its model and serial number.

When requesting engineering or applications information,
please state the model and serial number of the power
supply.

When ordering spare parts, please specify the part
number, the component function and the model and serial
number of the unit.

SL2KW SERIES MANUAL 26 118088-001 REV C

Chapter 8

FACTORY SERVICE

8.1 Warranty Repairs

During the Warranty period, Spellman will repair all units
free of charge. The Warranty is void if the unit is worked
on by other than Spellman personnel. See the Warranty in
the rear of this manual for more information. Follow the
return procedures described in Section 8.2. The customer
shall pay for shipping to and from Spellman.

8.2 Factory Service Procedures

Spellman has a well-equipped factory repair department. If
a unit is returned to the factory for calibration or rep air, a
detailed description of the specific problem should be
attached.

For all units returned for repair, please obtain an
authorization to ship from the Customer Service
Department, either by phone or mail prior to shipping.
When you call, please state the model and serial numbers,
which are on the plate on the rear of the power supply, and
the purchase order number for the repair. A Return
Material Authorization Code Number (RMA Number) is
needed for all returns. This RMA Number should be
marked clearly on the outside of the shipping container.
Packages received without an RMA Number will be
returned to the customer. The Customer shall pay for
shipping to and from Spellman.

8.3 Ordering Options and
Modifications

Many of the options listed in Chapter 5 can be retrofitted
into Spellman’s power supplies by our factory. For prices
and arrangements, contact the Spellman Sales Department.

8.4 Shipping Instructions

All power supplies returned to Spellman must be sent
shipping prepaid. Pack the units carefully and securely in a
suitable container, preferably in the original container, if
available. The power supply should be surrounded by at
least four inches of shock absorbing material. Please return
all associated materials, i.e. high voltage output cables,
interconnection cables, etc., so that we can examine and test
the entire system.

All correspondence and phone calls should be directed to:
Spellman High Voltage Electronics Corp.

475 Wireless Boulevard
Hauppauge, New York 11788
TEL: [phone] FAX: [phone]

E-Mail: [e-mail]

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A preliminary estimate for repairs will be given by phone
by Customer Service. A purchase order for this amount is
requested upon issuance of the RMA Number. A more
detailed estimate will be made when the power supply is
received at the Spellman Repair Center. In the event that
repair work is extensive, Spellman will call to seek
additional authorization from your company before
completing the repairs.

SL2KW SERIES MANUAL 27 118088-001 REV C

To obtain information on Spellman’s product warranty please visit our website at:

http://www.spellmanhv.com/en/About/Warranty.aspx