TDK-Lambda 203, 303, 203L, 303L Operator's Manual

OPERATOR MANUAL FOR

303 Series 2 High Voltage

POWER SUPPLY

Document: 83489011 Rev A

405 Essex Road, Neptune, NJ 07753

Web: www.us.tdk-lambda.com/hp

TDK-LAMBDA AMERICAS

Tel: [phone]
Fax: [phone]

TABLE OF CONTENTS

Table of Contents

1. GENERAL INFORMATION..........................................................................1-1

1.1 INTRODUCTION....................................................................................................1-1

1.2 203 and 303 OVERVIEW.......................................................................................1-1

1.2.1 FEATURES..................................................................................................................... 1-1

1.2.2 BENEFITS....................................................................................................................... 1-1

1.2.3 APPLICATIONS:............................................................................................................. 1-1

1.3 CAPACITOR CHARGING TECHNOLOGY ............................................................1-2

1.4 CONTINUOUS DC OPERATION ...........................................................................1-2

1.5 ADDITIONAL FEATURES:.....................................................................................1-2

1.6 SAFETY PRECAUTIONS.......................................................................................1-3

1.7 SCOPE OF THIS MANUAL....................................................................................1-4

1.8 MODEL NUMBER FORMAT ..................................................................................1-4

2. SPECIFICATIONS .......................................................................................2-7

2.1 Output Power .........................................................................................................2-7

2.2 Polarity ............................................................................................................2-7

2.3 H.V. Return ............................................................................................................2-7

2.4 Pulse to Pulse Repeatability...................................................................................2-7

2.5 Rep Rate ............................................................................................................2-7

2.6 Protection ............................................................................................................2-7

2.7 Input Power:...........................................................................................................2-8

2.8 Phase Configuration...............................................................................................2-8

2.9 Power Factor..........................................................................................................2-8

2.10 Efficiency ............................................................................................................2-8

2.11 AC Line Filtering.....................................................................................................2-8

2.12 Inrush Current ........................................................................................................2-8

2.13 Max. Discharge ......................................................................................................2-8

2.14 Physical Specifications...........................................................................................2-8

2.15 Cooling Water........................................................................................................2-8

2.16 Water Fittings.........................................................................................................2-9

2.17 Weight ............................................................................................................2-9

2.18 Shock and Vibration...............................................................................................2-9

2.19 Shipping ............................................................................................................2-9

2.20 Air Temperature Range..........................................................................................2-9

2.21 Humidity ............................................................................................................2-9

2.22 Altitude ............................................................................................................2-9

i

3. OUT-OF-BOX-INSPECTION......................................................................3-11

3.1 VISUAL INSPECTION..........................................................................................3-11

3.2 ELECTRICAL INSPECTION.................................................................................3-11

3.2.1 TEST 1 .......................................................................................................................... 3-11

3.2.2 TEST 2 .......................................................................................................................... 3-11

3.3 CONTACTING TDK-LAMBDA AMERICAS CUSTOMER SERVICE.....................3-12

3.4 RETURNING DEFECTIVE UNITS .......................................................................3-12

4. INSTALLATION .........................................................................................4-13

4.1 19-INCH RACK MOUNTING ................................................................................4-13

4.2 VENTILATION REQUIREMENTS ........................................................................4-14

4.3 WATER COOLING REQUIREMENTS.................................................................4-14

4.4 ORIENTATION.....................................................................................................4-14

4.5 AC POWER CONNECTION.................................................................................4-15

83489011 Rev A

ii

TABLE OF CONTENTS

4.6 CONNECTING THE HIGH VOLTAGE OUTPUT..................................................4-16

5. CONTROLS, INDICATORS, CONNECTORS..............................................5-1

5.1 FRONT PANEL LAYOUT (L Model).......................................................................5-1

5.2 HV ON (Ref 1)........................................................................................................5-2

5.3 OUTPUT STATUS LEDs (Ref 2)............................................................................5-2

5.3.1 HV ON LED..................................................................................................................... 5-3

5.3.2 HV OFF LED................................................................................................................... 5-3

5.3.3 INHIBIT LED....................................................................................................................5-3

5.3.4 END OF CHARGE LED ..................................................................................................5-3

5.3.5 INTERLOCK OPEN LED.................................................................................................5-3

5.3.6 LOAD FAULT LED.......................................................................................................... 5-3

5.3.7 OVERTEMP LED............................................................................................................ 5-3

5.4 LOCAL VOLTAGE CONTROL (Ref 3) ...................................................................5-3

5.5 VOLTAGE BAR GRAPH (Ref 4).............................................................................5-4

5.6 VOLTAGE DISPLAY (Ref 5) ..................................................................................5-4

5.7 CURRENT DISPLAY (Ref 6)..................................................................................5-4

5.8 HV OFF/RESET (Ref 7) .........................................................................................5-4

5.9 OFF/LOCAL/REMOTE KEYSWITCH (Ref 8).........................................................5-4

5.10 POWER SUPPLY STATUS LEDs (Ref 9)..............................................................5-4

5.10.1 STATUS LED GROUP....................................................................................................5-4

5.10.1.1 ENABLE............................................................................................................5-4

5.10.1.2 INHIBIT ............................................................................................................. 5-4

5.10.1.3 AUTOINHIBIT (Normally OFF) ......................................................................... 5-5

5.10.1.4 SUMMARY FAULT (NormallyOFF) ................................................................. 5-5

5.10.1.5 LOAD FAULT (Normally OFF)..........................................................................5-5

5.10.1.6 LINE FAULT (Normally OFF)............................................................................ 5-5

5.10.2 HIGH VOLTAGE LED GROUP....................................................................................... 5-5

5.10.2.1 HV ON............................................................................................................... 5-5

5.10.2.2 HV OFF.............................................................................................................5-5

5.10.2.3 END OF CHARGE (Normally OFF)..................................................................5-5

5.10.2.4 EXCESS REVERSAL (Normally OFF).............................................................. 5-5

5.10.2.5 INTERNAL ARC (Normally OFF)...................................................................... 5-6

5.10.2.6 CLAMP (NormallyOFF).................................................................................... 5-6

5.10.3 COOLANT LED GROUP.................................................................................................5-6

5.10.3.1 FULL (Normally ON) ......................................................................................... 5-6

5.10.3.2 WARNING (NormallyOFF)............................................................................... 5-6

5.10.4 FAULT (Normally OFF)................................................................................................... 5-6

5.10.4.1 OVERTEMP (Normally OFF)............................................................................ 5-6

5.10.4.2 PURGE VALVE (NormallyOFF)....................................................................... 5-7

5.10.4.3 OVER PRESSURE (NormallyOFF)................................................................. 5-7

5.10.5 INPUT POWER LED GROUP (External Faults)............................................................. 5-7

5.10.5.1 HIGH LINE (Normally OFF)..............................................................................5-7

5.10.5.2 LOW LINE (NormallyOFF)............................................................................... 5-7

5.10.5.3 IMBALANCE (NormallyOFF)............................................................................5-7

5.10.5.4 INTERLOCK OPEN (Normally OFF) ................................................................ 5-7

5.10.5.5 BIAS FAULT (Normally OFF)............................................................................5-8

5.10.5.6 FAN FAIL (Normally OFF) ................................................................................ 5-8

5.11 VIEW SET push button (Ref 10) ............................................................................5-8

5.12 CURRENT BAR GRAPH (Ref 11).........................................................................5-8

5.13 AC POWER (Ref 12)..............................................................................................5-8

5.14 FRONT PANEL LAYOUT (S Model).......................................................................5-8

5.15 REAR PANEL LAYOUT (L Models)........................................................................5-9

5.15.1 INHIBIT BNC (Ref 1).....................................................................................................5-11

5.15.2 Coolant Water Inlet/Outlet (Ref 2/4)..............................................................................5-11

5.15.3 HV Output Connector....................................................................................................5-11

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TABLE OF CONTENTS

5.15.4 Cooling Fan ................................................................................................................... 5-11

5.15.5 Interlock/Power On Terminal strip.................................................................................5-11

5.15.6 Remote connector.........................................................................................................5-11

5.15.7 Slave connector.............................................................................................................5-11

5.15.8 Coolant service valve.................................................................................................... 5-11

5.15.9 Tank pressure gauge .................................................................................................... 5-11

5.15.10 Safety ground ................................................................................................................ 5-12

5.15.11 AC input terminal...........................................................................................................5-12

5.16 REAR PANEL LAYOUT (S Models) .....................................................................5-12

6. OPTIONAL FEATURES.............................................................................6-13

6.1 LOW ENABLE OPTION (-EN)..............................................................................6-13

6.2 5V PROGRAMMING OPTION (-5V).....................................................................6-13

6.3 LATCHING OVERLOAD PROTECTION OPTION (-LP).......................................6-13

6.4 CONTINUOUS DC OPTION (-DC).......................................................................6-13

6.5 REMOTE SENSE (-RS) .......................................................................................6-14

7. OPERATING INSTRUCTIONS ..................................................................7-15

7.1 LOCAL OPERATION (203/303L only)..................................................................7-15

7.2 REMOTE OPERATION (All models)....................................................................7-16

7.2.1 Remote Control Signals ................................................................................................7-17

7.2.2 Remote Operation with AUTOINHIBIT..........................................................................7-17

7.2.3 Remote Operation with INHIBIT....................................................................................7-19

7.3 Parallel Operation.................................................................................................7-20

7.3.1 Parallel system comprising 203/303L supplies ............................................................. 7-20

7.3.2 Parallel system comprising both 203/303L and 203/303S supplies.............................. 7-21

7.3.3 Parallel system comprising 203/303S supplies.............................................................7-21

iii

8. APPLICATION NOTES ..............................................................................8-23

List of Figures

FIGURE 4-1 203/303L FRONT VIEW......................................................................................... 4-13

FIGURE 4-2 203/303 REAR VIEW.............................................................................................4-14

FIGURE 4-3. AC INPUTTERMINAL BLOCK ................................................................................. 4-15

FIGURE 4-4 TYPICAL LOAD CIRCUIT CONNECTION..................................................................... 4-17

FIGURE 5-1. 203/303L FRONT PANEL CONTROLS AND INDICATORS............................................. 5-1

FIGURE 5-2 203/303S FRONT PANEL CONTROLS AND INDICATORS..............................................5-9

FIGURE 5-3 203/303L REAR PANEL CONNECTIONS ..................................................................5-10

FIGURE 5-4 203/303S REAR PANEL ........................................................................................5-12

FIGURE 7-1. EXTERNAL REMOTE INTERFACE CIRCUIT. ............................................................... 7-18

FIGURE 7-2 REMOTE INTERFACE WAVEFORMS FOR 303 OPERATED WITH AUTOINHIBIT........... 7-19

FIGURE 7-3 REMOTE INTERFACE WAVEFORMS FOR 303 OPERATED WITH INHIBIT......................7-20

FIGURE 7-4 PARALLEL OPERATION CONNECTIONS.................................................................... 7-21

83489011 Rev A

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TABLE OF CONTENTS

List of Tables

TABLE 1-1 MODEL DESCRIPTION FORMAT .................................................................................. 1-5

TABLE 4-1 RECOMMENDED AC INPUT CABLE............................................................................ 4-16

TABLE 5-1 FRONT PANEL CONTROLS AND INDICATORS (L MODEL)............................................... 5-2

TABLE 5-3 FRONT PANEL CONTROLS AND INDICATORS (S MODEL) .............................................. 5-9

TABLE 5-4 203/303L REAR PANEL FUNCTIONS......................................................................... 5-11

TABLE 6-1 203/303 REMOTE INTERFACE DESCRIPTION............................................................. 7-17

83489011 Rev A

GENERAL INFORMATION

1. GENERAL INFORMATION

1.1 INTRODUCTION

TDK-Lambda’s ALE series 203 and 303 are state of the art switch mode high voltage
power supplies, designed primarily for capacitor charging applications such as laser sys­tems, modulators, and pulse forming networks. They can also be used in many continu­ous DC applications including beam power for magnetrons, gyrotrons, klystrons and
electron beam loads.

The 203L and 303L Models are fully instrumented with front panel meters displaying
output voltage and current, status LEDs, a key switch for OFF, LOCAL or REMOTE op­eration, HV ON/OFF push-button switches, and a control for output voltage adjustment.
The rear panel features external interlock, external inhibit, remote control and slave
(parallel operation) control connections.

The 203S and 303S Models can only be operated by remote control and feature only
front panel status LEDs. The "S" Models have been designed to operate as a slave unit
to the "L" Models or in systems where local control is not a requirement. As many 203 or
303 supplies as required, can be connected in parallel to provide greater output power.

1.2 203 and 303 OVERVIEW

1-1

1.2.1 FEATURES

 203 - 20kJ/sec capacitor charging power, 30kW in continuous DC.
 303 - 30kJ/sec capacitor charging power, 50kW in continuous DC.
 Output voltages from 0-1kV to 0-50kV
 Rep rates from single shot to several hundred hertz.
 Local or remote operation (L Model) with comprehensive control interface.
 Parallel operation (master/slave) for high power applications.
 Water-cooling for major means of excess heat removal.
 State of the art "Heat Pipe Cooling" system.

1.2.2 BENEFITS

 Smallest package size available in this power range (50kW in 12.25” package)
 Highest power available in a single package
 Low EMI/RFI
 Low ambient heating and quiet operation
 Lightweight switchmode design
 Rack mount chassis configuration
 Low stored energy provides greater safety
 Immunity to external EMI

1.2.3 APPLICATIONS:

 Charging capacitors and capacitor banks.
 Powering pulse forming networks/modulators.

83489011 Rev A

1-2

 Powering lasers: Excimer, flashlamp pumped dye, Yag, CO2, etc.
 Line type modulators for RF generation and pulse discharge applications in re-

search.

 Continuous power for RF tubes – magnetron, gyrotron, TWT, klystron etc.
 Electron beam applications.
 DC power source for pulsed hard-tube and solid state modulators.

1.3 CAPACITOR CHARGING TECHNOLOGY

Capacitor charging applications require a power supply designed specifically for the
task. The Series 203 and 303 supplies allow capacitors to be charged in pulse forming
networks and modulators in a very fast, efficient and controllable manner.

The units are compact high power constant current sources that can linearly and rapidly
charge a capacitive load to high voltage. Once the load capacitor is charged to the pro­grammed voltage, the supply will switch over to a voltage regulation mode and maintain
the load voltage at the programmed level until the load is discharged.

The flexible design of the 203 and 303 allow the units to be ordered with (L model) or
without (S model) the front panel controls and meters. The front panel controls are ideal
in applications where local control and readbacks are necessary, such as R&D, labora­tory use and diagnostics. All front panel controls and indicator signals are available at
the rear panel remote control connector regardless which front panel option (L or S) is
selected. The S models feature only front panel status indicators and remote controls
and are a cost effective solution for applications where local controls are unnecessary.

The unit is self-contained, requiring only AC power and water for cooling. Several units
may be connected in parallel for higher power operation. There is no theoretical limit to
the number of units that may be paralleled. Typically one master unit and one or more
slave units may be used to obtain as much output power as necessary. Consult the

factory before connecting parallel units in continuous or DC applications.

The 203 and 303 are also ideally suited to charge reservoir capacitors in resonant
charging circuits where high rep rates (several kilohertz) are required, such as in metal
vapor lasers or solid-state modulators.

GENERAL INFORMATION

1.4 CONTINUOUS DC OPERATION

Although the 203 and 303 series has been designed for capacitor charging applications,
they can also be used as a continuous DC High Power Source for RF tubes such as
klystrons, TWTs, or other DC loads such as DC-DC converters. The DC option must be
specified when ordering, and the supply will be factory setup and tested with a continu­ous DC load. When 203/303 supplies are operated in continuous DC applications it is
necessary to add an external capacitor between the load and ground to improve the rip­ple performance of the unit. Our online Application Note 505 describes operating capaci­tor charging supplies in DC applications, and gives guidance in determining the size of
any additional external filter capacitance required.

App Note 505 can be found at:

http://www.us.tdk-lambda.com/hp/pdfs/application%20notes/93008505rC.pdf

1.5 ADDITIONAL FEATURES:

 Internal contactor and fuses for AC disconnect and protection

83489011 Rev A

GENERAL INFORMATION

 Standard AC power and control connectors
 Documentation Manual Including -

Installation
Check out
Block diagram
Suggested remote interfaces and control circuits

 10 ft (3m). output cable is standard, other lengths are optional.

NOTE: This manual contains information, instructions and diagrams which apply to
standard constructions. If special features or modifications have been installed, the
instructions specific to that modification are contained in Addenda and take prece­dence if conflicts exist. Please take care to refer to the correct information for your
unit.

1.6 SAFETY PRECAUTIONS

All 203 and 303 power supplies are designed to mini­mize the risk of fire or shock hazard. This instrument
received comprehensive mechanical and electrical in­spection prior to shipment. Nevertheless, certain safety

precautions must be observed. Only TECHNICALLY
QUALIFIED SERVICE PERSONNEL familiar with the principles of electrical safety should
operate this supply. The power supply SHOULD NOT BE EXPOSED TO WATER
(EXCEPT COOLING CONNECTIONS) OR MOISTURE OR DUSTY ENVIRONMENTS.
Electrical safety must be maintained at all times.

Lethal voltages are developed within the power supply's enclosure and at the output ca­ble. Therefore, the cover may not be removed by the user (see Warranty in preamble sec­tion for variance). Also, the large capacitors in the supply may store power even after the
AC input line is removed. ALLOW AT LEAST 40 SECONDS DISCHARGE TIME between
removing the AC input line and opening the cover. ALSO, ALLOW AT LEAST 40
SECONDS between switching the AC power off and switching it on again.

1. This product is designed for Indoor use

1-3

2. This product is designed for pollution degree 2.

3. This product is designed for Transient Overvoltage Category II

4. Ensure all covers are in place and securely fastened before switching ON the AC power.

5. Proper grounding from the input AC power is required to reduce the risk of electric
shock. Ensure that the AC Protective Earth Ground connection has at least the same
gauge wire as the supply leads shown in Table 4-1.

6. Where high leakage exists and there is a warning label on the rear panel, the Protective
Earth Ground must be connected. (Symbol for protective earth ground ).

7. Use extreme caution when connecting AC input power, and never apply the incorrect in­put voltage, refer to ratings label.

8. Use extreme caution when connecting the high voltage output cable to the load.

9. Ensure all load capacitors are completely discharged prior to connection. Never handle
the output cable when the power supply is operating.

83489011 Rev A

1-4

GENERAL INFORMATION

10. Never attempt to operate the power supply in any manner not described in this manual.

11. Never remove DANGER and WARNING labels from the power supply. Replace lost or
damaged labels immediately.

12. The power supply should only be serviced by TDK-Lambda Americas factory authorized
personnel.

13. No user maintenance is required.

14. No cleaning is required.

1.7 SCOPE OF THIS MANUAL

This manual is used for installing and operating the 203 and 303 Series 2 Power Supply
with a revised front panel layout shown in Figure 4-1. For older model 303 supplies refer
to manual part number 83489009 which can be found on our web site. Suggestions and
requirements for connecting AC power, load cables and signal cables are given. Various
operating modes and programming modes are described.

1.8 MODEL NUMBER FORMAT

The model numbering system for the 203 and 303 Series power supply includes sym­bols for features and options. They are separated by dashes.

Examples are: 303L-10kV-POS-400VAC and 203S-20kV-POS-DC.
The 203 and 303 are available with two basic front panel configurations, the L, and S.

The choice of panel configuration is dependent upon the installation and system re­quirements. See section 5 for further details.

Table 1-1 shows a partial listing of the model description format for the 203/303 Power
Supply family. For additional options, the customer may contact the Sales Department
at TDK-Lambda Americas. Special options are typically shown as a four-digit suffix to
the model number.

83489011 Rev A

GENERAL INFORMATION

203/303(model) - (voltage) - (polarity) - (mode) - (input) - (options)

Model (L, or S)
Output Voltage Range kV
POS or NEG Polarity

Standard

DC

Mode

Capacitor

Charging

Continuous

DC Operation

Blank

DC

AC INPUT VOLTAGE

432-528 VAC,

Standard

400VAC

Option

50-60 Hz

3 (88A Max)

360-440 VAC,

50-60 Hz

3 (100A Max)

(1)

Input Suffix

Blank

400VAC

OPTIONS

5V Programming 5V

Low Enable EN

Custom cable

length

Other options xxxx

1-5

xxxx

208VAC

Option

180-264 VAC,

50-60 Hz

3(95A Max)

208VAC

Note 1. See Input power table specification section 4.5 for more details.

Table 1-1 Model Description Format

83489011 Rev A

1-6

GENERAL INFORMATION

NOTES:

83489011 Rev A

SPECIFICATIONS

2. SPECIFICATIONS

2.1 Output Power

2-7

AC INPUT
VOLTAGE

432-528 VAC,

50-60 Hz, 3

360-440 VAC,

50-60 Hz, 3

180-264 VAC,

50-60 Hz, 3

MODE

Cap Charging 20kJ/sec av, 25kJ/sec pk 30kJ/sec av, 37.5kJ/sec pk
Continuous DC 30kW 50kW
Cap Charging 20kJ/sec av, 25kJ/sec pk 25kJ/sec av, 32.5kJ/sec pk
Continuous DC 30kW 40kW
Cap Charging 20kJ/sec av, 25kJ/sec pk Not Available
Continuous DC 20kW Not Available

2.2 Polarity

Fixed positive or negative (specify when ordering)

2.3 H.V. Return

Ground through H.V. output cable shield to chassis, and through separate safety ground
cable.

2.4 Pulse to Pulse Repeatability

± 0.5% full load range and input voltage range into minimum capacitance (value dependent on
minimum voltage range).

MAXIMUM OUTPUT POWER RATING

MODEL 203 MODEL 303

2.5 Rep Rate

Single shot to 200 Hz. Lower regulation for 200Hz to 1 kHzrates.

2.6 Protection

Open circuit at turn on
Output over voltage
Output short circuit
AC input power failure
AC input power out of range
Excess voltage
Over and under temp

83489011 Rev A

2-8

2.7 Input Power:

SPECIFICATIONS

AC INPUT VOLTAGE

432-528 VAC,

50-60 Hz, 3

360-440 VAC,

50-60 Hz, 3

180-264 VAC,

50-60 Hz, 3

Note (1): Refer to section 2.1 for output power rating

2.8 Phase Configuration

Wye or Delta, any rotation, separate ground.

2.9 Power Factor

0.9 at full load and nominal AC line

2.10 Efficiency

85% at full load and nominal AC line

MAXIMUM INPUT CURRENT

MODEL 203 MODEL 303

40A/Phase (Cap charging) 60A/Phase (Cap charging)

60A/Phase (Continuous DC) 98A/Phase (Continuous DC)

47A/Phase (Cap charging) 71A/Phase (Cap charging)

71A/Phase (Continuous DC) 94A/Phase (Continuous DC)

94A/Phase (Cap charging) Not Available

94A/Phase (Continuous DC) Not Available

(1)

2.11 AC Line Filtering

Passive power factor correction and EMI filters included

2.12 Inrush Current

Limited to below full power level

2.13 Max. Discharge

15 seconds to safe output level at output cable without external load consideration.

2.14 Physical Specifications

Size: 19" (483 mm) Rackmount standard front panel

17" (432 mm) chassis width

12.25" (311 mm) High
22" (559 mm) Deep + 5" (127 mm) for cables

2.15 Cooling Water

Maximum exit temperature for cooling water at approximately 2.0 US gpm (7.6 L/min) is 35°C
Minimum exit temperature for cooling water at approximately 2.0 US gpm (7.6 L/min) is 15°C
(Higher temperature water requires greater flow). All water paths are at ground potential and are
copper or brass.

83489011 Rev A

SPECIFICATIONS

2.16 Water Fittings

1/4 inch NPT male threaded pipes

2.17 Weight

190 lbs. (86.4 kg) approx.

2.18 Shock and Vibration

Unboxed 0.5 g.
Factory packing2.0 g

2.19 Shipping

Gross weight with packingmaterial: 240 lbs. (109 kg) approx.
Size: 27"W X 21" H X 30"D (686 mm X 535 mm X 762 mm)

2.20 Air Temperature Range

Operating: 0°C to 55°C ambient air

Storage: -55°C to 70°C

2.21 Humidity

2-9

Operating: 0% to 90% (Non-condensing)
Storage: 0% to 90%

2.22 Altitude

Operating: 12,000 ft. (3658 m)
Storage: 30,000 ft. (9144 m) at 25°C or less

83489011 Rev A

2-10

SPECIFICATIONS

NOTES:

83489011 Rev A

OUT-OF-BOX-INSPECTION

3. OUT-OF-BOX-INSPECTION

3.1 VISUAL INSPECTION

Prior to shipment, this instrument was inspected and found to be free of mechanical and
electrical defects. As soon as the unit is unpacked, inspect for any damage that may
have occurred in transit. Verify the following:

A. Check the operation of the front panel control (knob should rotate smoothly).
B. Confirm that there are no dents or scratches on the panel surfaces.
C. Check front panel meters and LEDs for any broken or cracked lenses.

If any damage is found, follow the instructions in Section 3.3 and in the "Returning
Equipment" instructions in the preamble section of this manual.

3.2 ELECTRICAL INSPECTION

Before the power supply is installed in a system, verify that no internal damage occurred
during shipping. A simple preliminary electrical test should be performed. These tests
are described below. Note: The sequences described are for L models, for S models
the corresponding signals must be applied and monitored through the remote control in­terface.

3-11

3.2.1 TEST 1

Purpose: Verify general logic operation and generate maximum output current and

check overload protection circuits. With AC power "OFF" and disconnected, short the
H.V. output by connecting the center conductor of the output cable to its return shield
(braid). This dead short will allow the unit to generate full output current at zero voltage.

1. Set the output voltage control to zero. Connect the AC power to the unit. Turn "ON"

the AC power front panel switch.

2. Turn the front panel keyswitch to the LOCAL position (if applicable). Press the H.V.

"ON" button and turn up the H.V. control until the power supply is generating output
current into the dead short. The current meter will indicate max. current. The voltage
meter will read zero and the power supply will intermittently turn on and off indicating
the "overload" condition. The unit should continue to cycle in this mode with a 1 sec.
repetition rate indefinitely. (The power supply will go into overload when max. current
is drawn for more than half a second).

3. Turn off the H.V. and A.C. power switches.
This test indicates the inverter section is generating maximum current and the logic and

overload circuitry works correctly.

3.2.2 TEST 2

Purpose: Verify that the power supply generates maximum rated voltage, and the regu-

lation and feedback circuits are functioning.

1. With AC power OFF and disconnected, connect an appropriate load capacitor to the

power supply output cable.

2. Prepare to charge the capacitor. NOTE: Operating a 203 or 303 power supply into

an open circuit (no load operation) will instantly damage the power supply's H.V.
output diodes. Make sure the load (capacitor) is connected and the H.V. output ca­ble is securely inserted and connected.

83489011 Rev A

3-12

OUT-OF-BOX-INSPECTION

3. For L models turn the voltage control on the front panel turned all the way down to

zero (counter clockwise), apply AC power and press the HV ON button. By turning
up the H.V. control knob the capacitor will charge to the voltage indicated on the
front panel voltmeter. The power supply may be turned all the way up to its max.
output voltage provided the load capacitor is sufficiently rated.

4. By turning the voltage control down or depressing the H.V. OFF button, the capacitor

will "bleed" down through the internal voltage divider resistors used for regulation
feedback.

Test #2 indicates the H.V. section is working correctly. Tests 1 and 2 generally indicate
the unit is functioning as designed. Although 100% power had not been generated, the­se two tests give greater than 90% confidence that the unit is not damaged.

If any inconsistency from the above test procedure is noted, do not hesitate to call TDK­Lambda Americas Customer Service for assistance.

The supply and the coolant filled HV assembly should not be opened unless advised by
TDK-Lambda Americas personnel. The coolant filled HV tank has been cleaned and the
hermetically sealed at the factory, opening the supply or the assembly will void the facto­ry warranty, and may compromise performance.

3.3 CONTACTING TDK-LAMBDA AMERICAS CUSTOMER SERVICE

When contacting customer service locate the product description, part number and seri­al number from the label located on the rear of the unit, and have this information avail­able.

Phone: [phone] x 342 E-mail: [e-mail]
Fax: [phone]

Customer Service, or an approved Service Center, should be contacted if:

 The power supply is mechanically or electrically damaged.
 The power supply requires on-site calibration, or replacement warning decals.
 The customer has questions about a special application that is not described in this

manual.

Normally, the customer may NOT open any chassis covers that have a warranty seal.
Breaking a seal will void the warranty.

At the discretion of TDK-Lambda Americas, the customer may be granted permission to
break the warranty seal and open the chassis covers. Customer Service shall confirm
the permission by sending a replacement seal. Once the unit has been serviced, the
customer shall close the cover and apply the replacement seal adjacent to (not on top
of) the broken seal.

3.4 RETURNING DEFECTIVE UNITS

The procedure for returning defective products is given in section 3.3 of this manual.

83489011 Rev A

INSTALLATION

4. INSTALLATION

4.1 19-INCH RACK MOUNTING

This power supply is intended for mounting in a conventional 19-inch rack. It’s 12.25
inch height makes it a “7U” size instrument. The rack should enclose the sides, top and
back to protect the operator from electrical shock and protect the supply from environ­mental contamination.

Never install the 203 or 303 so only the front panel screws
support its weight!

The 203/303 must never be installed without support in the back or sides of the unit. The
203/303 should be mounted on heavy-duty chassis slides –such as General Devices
CTS-124- or on a suitable shelf or supports inside the rack.

4-13

MODEL 303

STATUS

HV ON

HV OFF

STATUS COOLANT INPUT POWERHIGH VOLTAGE

HV ON

HV OFF
INHIBIT
END OFCHARGE
INTERLOCK OPEN
LOAD FAULT
OVERTEMP

CONTROL

OFF

ENABLE
INHIBIT
AUTOINHIBIT
SUMMARY FAULT

LINE FAULT

LOCALREMOTE

VOLTAGE

ADJUST

10 TURNINC

CURRENT

VIEWSET

HVON
HVOFF
END OFCHARGE
EXCESSREVERSAL
INTERNAL ARCLOAD FAULT
CLAMP

Figure 4-1 203/303L Front View

FULL
WARNING
FAULT
OVERTEMP
PURGE VALVE
OVERPRESSURE

kV

110%10080 90706050403020100

A

110%10080 90706050403020100

POWER

HIGH LINE
LOW LINE
IMBALANCE
INTERLOCK OPEN
BIAS FAULT
FANFAIL

83489011 Rev A

4-14

(

115

mm)

(

107

mm)

(89mm)

(

152

mm)

(

294

mm)

(

294

mm)

12.22”

4.52”

INSTALLATION

19” (482mm)

17” (432mm)

4.21”

COOLANTWATERIN OUT

11.56”

INHIBITREMOTE

HV OUTPUT

6.0”

COOLANT

SLAVE

3.5”

Figure 4-2 203/303 Rear View

4.2 VENTILATION REQUIREMENTS

Ensure there is at least 5 inches (12.5 cm) of clearance at the rear of the unit for air­flow, cables and water lines. If the power supply is to be installed in an enclosed system,
care must be taken to ensure the ambient inlet air to the power supply does not exceed
the maximum operating temperature of 55°C.

0
5

-

-

1

0

0

-10

-20

-30

inHg psi

0
0

5

0

1

0

0

10

1
5

20

0

30

0

0

2

kPa

438-528VAC

50/60 Hz

TB2 1 2 3 4

A B C N GND
1 2 3 4 5

!

INTERLOCK/POWERON

TB 1AC INPUT

4.3 WATER COOLING REQUIREMENTS

Water with a flow rate at 2 US gallons per minute (7.6litres/min) having an exit tempera­ture of 15 to 35°C is required to cool the instrument. This is required to maintain the al­lowable tank temperature range of 15 to 48°C. Chilled water should not be used. ( ­If the supply is to be stored at temperatures below 4°C, the user should ensure all water
is blown out of the coolant pipes).

4.4 ORIENTATION

The power supply must be operated in a level horizontal orientation. More than a quar­ter of an inch (6.25mm) difference in height in any direction could potentially cause an
arcing condition and/or coolant fault in the high voltage tank and should be avoided.

83489011 Rev A

INSTALLATION

B2C3N45

TB1 AC INPUT

B2C3N45

TB1 AC INPUT

4.5 AC POWER CONNECTION

The maximum voltage allowed between any two AC input
terminals is 550VAC. If this voltage is exceeded,
catastrophic damage will result, that is not covered by
TDK-Lambda Americas standard warranty.

The customer’s AC power line connects to the 203/303 via a UL/CSA approved 5 posi­tion terminal block on the rear panel of the unit (see Figure 4-3). Only use a power cable
with the correct voltage and current rating (see Table 4-1). The ground wire must be
equal to or larger than the recommended gauge. Proper grounding from the input AC
power is required to reduce the risk of electric shock. The metal chassis of the power
supply is grounded through the earth wire at the input AC power terminal block. Use ex­treme caution when connecting input AC power and never apply the incorrect input
power.

The Protective Earth Ground must be connected before
applying AC Line Power to the 203/303.

4-15

Connect the three lines of the input power to the L1, L2, L3 terminals and the earth
ground to the terminal marked with the ground symbol ( ). No neutral connection is

required for the 480, 400, or 208VAC configuration. The power connections are not
phase rotation sensitive, so any phase can be connected to any of the AC inputs. The
recommended torque for the AC input terminals is 35in-lb.

A

A
1

1

Figure 4-3. AC Input Terminal Block

83489011 Rev A

4-16

INSTALLATION

AC INPUT
VOLTAGE

432-528 VAC,

50-60 Hz, 3

360-440 VAC,

50-60 Hz, 3

180-264 VAC,

50-60 Hz, 3

MODE

Cap Charging 5 AWG 4 AWG
Continuous DC 4 AWG 3 AWG
Cap Charging 5 AWG 4 AWG
Continuous DC 4 AWG 3 AWG
Cap Charging 3 AWG Not Available
Continuous DC 3 AWG Not Available

RECCOMENDED AC INPUT CABLE SIZE

MODEL 203 MODEL 303

Table 4-1 Recommended AC Input Cable

The AC input rating is marked on the rear terminal of the power supply. The rating is al­so part of the unit’s model description shown in Table 1-1.

4.6 CONNECTING THE HIGH VOLTAGE OUTPUT
Voltage reversal at the output of this power supply can potentially cause

damage to the high voltage section if reverse current is not limited. Refer to
Application Note 517 (available from the factory or at www.us.tdk­lambda.com/hp) for more information.

Ensure that the power supply is off and disconnected
from the AC input power and that all load capacitors are
discharged and shorted to ground before making any
connections. Never handle the HV cable while the supply
is operating. Never operate the supply without a load
capacitor connected.

Always use the HV connector and cable provided with the power supply or an equivalent
substitute provided by TDK-Lambda Americas. Fully insert the connector end of the HV
cable and tighten the locking nut only "hand tight".

When operating above 20kV and 200Hz rep rate a silicone grease (such as Dow Corn­ing DC-4) must be applied to the HV cable before insertion into the HV connector. The
grease is used to displace air in the connector and reduce long-term corona effects. A
cable greasing procedure is available for download from the TDK-Lambda Americas
web site.

The load ground must be connected to the chassis ground through a separate safety
ground cable with a suggested minimum wire size of 6 AWG in addition to the H.V. out­put cable shield (see Figure 4-4).

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 under-

83489011 Rev A

INSTALLATION

damped 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.

Currents due to voltage reversal at high rep. rates could damage the power supply.
Generally, a resistor in series with the HV output can be added to limit this current to an
acceptable level. Refer to Application Note 517 (available from the factory or at
www.us.tdk-lambda.com/hp) for more information.

LOAD CIRCUIT

LOAD CIRCUIT

HV Switch

HV Switch

4-17

COOLANTWAT ER OUTIN

COOLANTWAT ER OUTIN

COOLANTWAT ER OUTIN

COOLANTWAT ER OUTIN

10

10

10

10

10

10
5

5

5

5

5

5

0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

COOLANT

COOLANT

COOLANT

COOLANT

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

-20

-30

-30

-30

-30

-30

-30

PRESSURE GAUGE

PRESSURE GAUGE

PRESSURE GAUGE

PRESSURE GAUGE

30

30

30

30

30

30

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

5

5

5

5

3 AC

3 AC

POWER

POWER

SAFETY

SAFETY

GROUND

GROUND

A

A
B

B
C

C

Figure 4-4 Typical Load Circuit Connection

Dress the high voltage cable creating a gentle curve making sure 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 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 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. With the shield 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.

83489011 Rev A

4-18

INSTALLATION

NOTES:

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

78910121112345

6

5. CONTROLS, INDICATORS, CONNECTORS

5.1 FRONT PANEL LAYOUT (L Model)

The 203/303L series power supply is equipped with a fully instrumented front panel fea­turing output voltage control, voltage and current metering, and comprehensive status
LEDs, along with local/remote mode keyswitch, and power on switch. The 203/303L can
be operated locally from the front panel or remotely via the control connector located on
the rear panel (see Section 7.2).

Figure 5-1 below shows the front panel layout of the 203/303L power supply.

5-1

MODEL 303

STATUS

INHIBIT
END OFCHARGE
INTERLOCK OPEN
LOAD FAULT
OVERTEMP

CONTROL

OFF

ENABLE
INHIBIT
AUTOINHIBIT
SUMMARY FAULT

LINE FAULT

HV ON
HV OFF

LOCALREMOTE

HV ON

HV OFF

STATUS COOLANT INPUT POWERHIGH VOLTAGE

VOLTAGE

ADJUST

10 TURNINC

CURRENT

VIEWSET

HVON
HVOFF
END OFCHARGE
EXCESSREVERSAL
INTERNAL ARCLOAD FAULT
CLAMP

FULL
WARNING
FAULT
OVERTEMP
PURGE VALVE
OVERPRESSURE

kV

110%10080 90706050403020100

A

110%10080 90706050403020100

POWER

HIGH LINE
LOW LINE
IMBALANCE
INTERLOCK OPEN
BIAS FAULT
FANFAIL

Figure 5-1. 203/303L Front Panel Controls and Indicators

The function of each numbered item is outlined in Table 5-1

83489011 Rev A

5-2

CONTROLS, INDICATORS, CONNECTORS

REF DESCRIPTION NOTE SECTION

1 HV ON Push Button Turns ON HV output 5.2
2 Output Status Output Status LEDs 5.3
3 Local Voltage Set 10 turn pot for setting output voltage in local mode 5.4
4 Voltage Bar Graph
5 Voltage Display Digital display of output or set voltage 5.6
6 Current Display Digital display of average output current 5.7
7 HV OFF Push Button Turns OFF HV output and resets latching faults 5.8

8

9 Status LEDs

10
11 Current Bar Graph
12 Power switch Turns on/off power to auxiliary circuits 5.13

Local/Remote
Keyswitch

View set push button Push to view the output voltage set point in local mode

Analog bar graph showing output voltage (%)

Switches control between remote, local, and off modes 5.9
Detailed status LED displaying showing operating condi-

tion and any faults

Analog bar graph showing output current (%)

Table 5-1 Front Panel Controls and Indicators (L Model)

The front panel controls/indicators are described in detail in the following sections.

5.2 HV ON (Ref 1)

DO NOT DEPRESS THE HV ON PUSH-BUTTON UNLESS A
SUITABLE CAPACITIVE LOAD IS CONNECTED TO THE
POWER SUPPLY'S OUTPUT CABLE, AND THE LOAD IS
CORRECTLY GROUNDED

5.5

5.10

5.11

5.12

The HV ON push button turns ON the high voltage output when depressed only after all
interlocks are closed, self checks are completed and the unit is switched to the LOCAL
mode. HIGH VOLTAGE will be generated immediately when the HV ON is depressed
and the HV ON LED will illuminate and remain illuminated while the HV is ON. The sup­ply will charge the load to the voltage determined by the HV LEVEL ADJUST 10 turn
pot. It is good practice to turn the LOCAL VOLTAGE CONTROL pot fully counterclock­wise (to zero) before pushing the HV ON button when first using this power supply. Lat­er on during system usage, the LOCAL VOLTAGE CONTROL may be left set at the de­sired level.

If a fault is present when the HV ON push-button is depressed, the SUMMARY FAULT
LED will illuminate.

5.3 OUTPUT STATUS LEDs (Ref 2)

There are 6 output status LEDs on the front panel, indicating the state of the HV Output
circuit and some of the fault detection circuits in the control system.

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

5.3.1 HV ON LED

The HV ON LED indicates that the HV output circuit is enabled and the supply will deliv­er output current if it is not inhibited by an external inhibit input. HV ON LED is active in
local and remote modes.

5.3.2 HV OFF LED

The HV OFF LED indicates that the HV output circuit is disabled and the supply cannot
deliver output current. HV OFF LED is active in local and remote modes.

5.3.3 INHIBIT LED

If the Inhibit LED is illuminated it indicates the presence of an active inhibit signal, and
the supply will not deliver charging current after the HV ON button is pushed. Inhibit is
applied either via the rear panel mounted BNC connector or via the remote control con­nector, do not use both inputs at the same time. Inhibit LED is active in local and remote
modes.

5.3.4 END OF CHARGE LED

The END OF CHARGE indicator will illuminate when the load capacitor is charged to the
programmed output voltage. The END OF CHARGE indicator will be extinguished when
the high voltage is OFF or during load charging. END OF CHARGE may illuminate if
the output voltage is programmed to zero.

5-3

5.3.5 INTERLOCK OPEN LED

The INTERLOCK OPEN LED illuminates if the safety interlock circuit is not closed. The
power supply cannot be turned on if the interlock loop is open. If the interlock loop is
opened when the unit is running (ie when HV in ON), the unit will turn off with a latching
fault, requiring an HV ON/OFF reset cycle before it can be restarted. Interlock Open
LED is active in local and remote modes.

5.3.6 LOAD FAULT LED

The LOAD FAULT LED indicates the presence of a fault in the load circuit due to a short
circuit or large external capacitor. LOAD FAULT is activated if the charge voltage does
not meet the programmed voltage within 500milliseconds. The fault automatically clears
and the unit will restart charging after a further 500milliseconds unless the Latching Pro­tection (LP) option is specified. Load Fault LED is active in local and remote modes.

5.3.7 OVERTEMP LED

The OVERTEMP LED indicates an overtemperature condition internal to the supply. The
temp fault will clear once the temperature is below the fault threshold, but the unit will
not restart without a reset cycle. Overtemp LED is active in local and remote modes.

5.4 LOCAL VOLTAGE CONTROL (Ref 3)

The LOCAL VOLTAGE CONTROL is a 10 turn potentiometer that adjusts the output
voltage between zero and 100% of rated voltage. The set point can be viewed on the
VOLTAGE DISPLAY by pushing the VIEW SET button. The output voltage can be set at
the desired level by turning the control to the required output voltage before depressing
the HV ON push button. It is good practice to turn the control fully counter clockwise af­ter operating the supply. The local voltage control has no effect when the supply is op­erate in remote mode.

83489011 Rev A

5-4

CONTROLS, INDICATORS, CONNECTORS

5.5 VOLTAGE BAR GRAPH (Ref 4)

The voltage bar graph is a 'quick view' analog percentage indication of the voltage
measured at the power supply output. Bar graph is active in local and remote modes.

5.6 VOLTAGE DISPLAY (Ref 5)

The Voltage Display is a 4 digit LED indicator showing the voltage measured at the
power supply output. This display momentarily shows the output program voltage after
the View Set button is depressed. Voltage Display is active in local and remote modes.

5.7 CURRENT DISPLAY (Ref 6)

The Current Display is a 4 digit LED indicator showing the average current delivered by
the power supply output. Current display is active in local and remote modes.

5.8 HV OFF/RESET (Ref 7)

The HV OFF push button is a momentary switch that when depressed turns off HV out­put. If the power supply shuts off with a summary fault (indicated by SUMMART FAULT
LED illuminating), then this condition can be reset by pushing the HV OFF button. If the
supply is operated in remote mode the HV OFF push button will still function.

5.9 OFF/LOCAL/REMOTE KEYSWITCH (Ref 8)

DO NOT MOVE THE KEYSWITCH POSITION FROM OFF TO

LOCAL OR REMOTE UNLESS A SUITABLE CAPACITIVE

LOAD IS CONNECTED TO THE POWER SUPPLY'S OUTPUT

CABLE, AND THE LOAD IS CORRECTLY GROUNDED.

The OFF/LOCA/REMOTE Keyswitch switches the power supply operating modes be­tween OFF, LOCAL, and REMOTE. The key can be removed in the OFF position to
prevent unauthorized use. If the switch is in the LOCAL position the supply will operate
from the front panel. In the REMOTE position the supply can only be operated via the
remote control interface. An L model supply can simulate an S model with the key in the
REMOTE position.

5.10 POWER SUPPLY STATUS LEDs (Ref 9)

There are four distinct sets of status LEDs on the 203/303L/S front panel. Each group
indicates the status of a specific section of the power supply.

5.10.1 STATUS LED GROUP

5.10.1.1 ENABLE

Indicates the HV output circuitry is Enabled and HV may be present at the power supply
output.

5.10.1.2 INHIBIT

The INHIBIT indicator displays the logical OR of all the internal and external signals that
prevent HV output current, including EOC, AUTOINHIBIT, EXTERNAL INHIBIT,
OVERLOAD, and any fault. If the INHIBIT indicator is OFF and the unit is not delivering
charge current, there is an internal power supply failure that may require servicing by
authorized service personnel. If an inhibit signal (HIGH) is applied at the rear panel BNC
connector, the INHIBIT indicator will illuminate and output current cannot be delivered.

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

5.10.1.3 AUTOINHIBIT (Normally OFF)

The AUTOINHIBIT feature shuts OFF or inhibits the output current when the capacitive
load is discharged. This feature allows the HV switch in the external load circuit (if appli­cable) to better recover after a load switching event.

The AUTOINHIBIT feature overcomes the need for the external inhibit signal in most
cases. The AUTOINHIBIT circuit automatically creates an internal inhibit of approxi­mately 1ms after the circuit detects high dv/dt at the output. The AUTOINHIBIT period
can be programmed via a 0-10 VDC signal applied to the AUTOINHIBIT input on the
rear panel remote interface connector. 0V input gives an AUTOINHIBIT period of ap­proximately 500s, 10V gives an AUTOINHIBIT period of 10ms.

5.10.1.4 SUMMARY FAULT (Normally OFF)

SUMMARY FAULT LED indicates any internal or external fault condition that prevents
the power supply from operating. This condition can be cleared by pushing the HV OFF
button to reset the fault.

5.10.1.5 LOAD FAULT (Normally OFF)

The LOAD FAULT LED indicates the presence of a fault in the load circuit due to a short
circuit or large external capacitor. LOAD FAULT is activated if the charge voltage does
not meet the programmed voltage within 500milliseconds. The fault automatically clears
and the unit will restart charging after a further 500milliseconds unless the Latching Pro­tection (LP) option is specified. Load Fault LED is active in local and remote modes.

5-5

5.10.1.6 LINE FAULT (Normally OFF)

The LINE FAULT LED illuminates when an input power fault occurs. The LINE FAULT
indicator will remain ON (latch ON) after the specific external fault condition detected
has cleared (the specific indicator goes OFF). The LINE FAULT LED will turn off the
power supply output and under certain conditions will open the main AC power contac­tor. The LINE FAULT indicator may be reset by depressing the HV OFF push-button on
the front panel.

5.10.2 HIGH VOLTAGE LED GROUP

5.10.2.1 HV ON

The HV ON LED indicates that the HV output circuit is enabled and the supply will deliv­er output current if it is not inhibited by an external inhibit input. HV ON LED is active in
local and remote modes.

5.10.2.2 HV OFF

The HV OFF LED indicates that the HV output circuit is disabled and the supply cannot
deliver output current. HV OFF LED is active in local and remote modes.

5.10.2.3 END OF CHARGE (Normally OFF)

The END OF CHARGE indicator will illuminate when the load capacitor is charged to the
programmed output voltage. The END OF CHARGE indicator will be extinguished when
the high voltage is OFF or during load charging. END OF CHARGE may illuminate if
the output voltage is programmed to zero.

5.10.2.4 EXCESS REVERSAL (Normally OFF)

This indicator will illuminate if excess voltage reversal is detected at the HV output. A
large reversal would cause damage to the power supply by drawing too much current

83489011 Rev A

5-6

CONTROLS, INDICATORS, CONNECTORS

through the output diode rectifiers. While the EXCESS REVERSAL sense circuit does
not directly protect the diodes, it will stop the power supply from continuing to run in the
case where reversal may be building up and could cause damage if left unchecked.

This protection circuit will reset automatically after three (3) seconds and restart the
power supply. Repeated operation of this circuit indicates the presence of a persistent
problem that must be corrected by some form of protection, clipper circuit or series re­sistor. Refer to Application Note 517 (available from the factory or at www.us.tdk­lambda.com/hp) for more information.

5.10.2.5 INTERNAL ARC (Normally OFF)

When illuminated, the INTERNAL ARC indicator signals a major fault internal to the high
voltage tank of the power supply. This type of fault may be reset if the POWER is cy­cled; however, if it recurs, the unit should not be used any further because the output
may be uncontrolled if present and could cause further damage to the supply or its load.
The power supply should then be serviced by qualified personnel.

5.10.2.6 CLAMP (Normally OFF)

The CLAMP indicator illuminates when an overvoltage condition is detected on the out­put. The CLAMP indicator will also illuminate if the unit is being programmed to a higher
voltage than it is rated for. The power supply will turn OFF the high voltage output (inhib­ited) and may be reset by depressing the HV OFF push-button on the front panel when
the overvoltage condition is no longer present.

5.10.3 COOLANT LED GROUP

In the event of any coolant faults the user should verify installation orientation is in ac­cordance with Section 4.4 prior to contacting TDK-Lambda Americas.

5.10.3.1 FULL (Normally ON)

When illuminated, this indicator signals that the high voltage tank in filled to the correct
level with coolant. This indicator may be extinguished if the unit is cold.

5.10.3.2 WARNING (Normally OFF)

This indicator will FLASH if the coolant drops below its safe operation level, indicating
that the coolant may be leaking (there are no environmental or safety hazards from this
coolant leaking. It will evaporate before it collects). The unit should be serviced if the
coolant is low.

5.10.4 FAULT (Normally OFF)

The FAULT indicator when illuminated indicates the coolant level is below the allowable
level to safely operate the power supply. The FAULT indicator will turn OFF the high
voltage output and it cannot be reset until the coolant level is corrected. The unit must
be serviced by authorized service personnel.

5.10.4.1 OVERTEMP (Normally OFF)

The OVERTEMP LED illuminates if the HV tank temperature is outside of its operating
limits. The fixed operating limits have minimum low temperature and a maximum high
temperature. When illuminated, the OVERTEMP indicator will turn OFF the high voltage
output. When the internal temperature returns to a normal level, the output may be
switched back on by depressing the HV ON push-button.

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

The coolant has a wide operating temperature range and is controlled and stabilized by
the cooling water flowing through the high voltage tank. The maximum allowable tank
temperature is 45°C, and the minimum is 15°C.

This temperature range can be maintained by running normal tap water through the
power supply at a rate of 2 gallons per minute (7.58 L/min). Chilled water should not be
used, it can cause the lower operating temperature limit to be reached, as well as caus­ing condensation to form which should always be avoided. Condensation in the power
supply may result in damage and the warranty will be void.

5.10.4.2 PURGE VALVE (Normally OFF)

The PURGE VALVE indicator illuminates when the purge valve is operating. The valve
will operate automatically, cycling on and off when necessary. The interval of operation
should be only a few minutes at a time and not more than once in any continuous 24­hour operating period. The power supply will continue to run normally during the auto­matic purge operation. The purge valve is designed to remove excess air that may ac­cumulate in the high voltage tank, to allow the most efficient cooling and best possible
dielectric environment.

5.10.4.3 OVER PRESSURE (Normally OFF)

Indicates the presence of an OVER PRESSURE condition in the HV tank. Can be reset
by depressing the HV OFF button after the condition has cleared. Repeated OVER
PRESSURE faults are an indication of a problem in the HV tank. Contact the factory for
service.

5-7

5.10.5 INPUT POWER LED GROUP (External Faults)

5.10.5.1 HIGH LINE (Normally OFF)

The HIGH LINE LED illuminates when the external AC input voltage is above the maxi­mum limit (typically 10% above nominal). Damage can result if the AC input exceeds the
rating and so the supply disconnects itself from the line by opening the contactor.

When the HIGH LINE condition is removed the indicator extinguishes and the power
supply can be reset by operating the HV OFF push-button.

5.10.5.2 LOW LINE (Normally OFF)

The LOW LINE LED will illuminate if the AC input voltage drops below approximately
85% of the nominal nameplate level. The power supply will continue to deliver output
current unless the AC input voltage dip is too great (either low voltage or for a long
time). The power supply will shut down the output until the AC line is restored. The line
fault resets the power supply automatically.

5.10.5.3 IMBALANCE (Normally OFF)

The IMBALANCE LED illuminates if an internal power imbalance occurs, which could
happen under abnormal power conditions. The fault will automatically reset when the
condition corrects itself.

The AC contactor is opened and the FAULT indicator is illuminated which may be reset
using the push-button after the IMBALANCE LED extinguishes. This does not indicate
an AC line to line imbalance.

5.10.5.4 INTERLOCK OPEN (Normally OFF)

INTERLOCK OPEN illuminates when the interlock loop on rear panel is opened. If the
interlock is opened while the supply is operating, the main AC line contactor will be

83489011 Rev A

5-8

opened, disconnecting AC power from the HV circuitry. The INTERLOCK OPEN LED
indication is reset automatically when the interlock circuit is closed (LED extinguished),
but before power can be generated the fault condition must be reset by pushing the HV
OFF push-button.

5.10.5.5 BIAS FAULT (Normally OFF)

When illuminated indicates the internal DC control voltage is low, or out of range.

5.10.5.6 FAN FAIL (Normally OFF)

Indicates failure of the auxiliary cooling fan. The power supply should be removed for
service if this indicator is illuminated.

CONTROLS, INDICATORS, CONNECTORS

5.11 VIEW SET push button (Ref 10)

The view set push button changes the reading on the digital voltage display from the
power supply output voltage, to the programmed voltage set on the local voltage set po­tentiometer. After pushing this button the set voltage is displayed for approximately 3
seconds.

5.12 CURRENT BAR GRAPH (Ref 11)

The current bar graph is a 'quick view' analog percentage indication of the current
measured at the power supply output. Bar graph is active in local and remote modes.

5.13 AC POWER (Ref 12)

The front panel POWER switch controls the main input power to the unit. When closed,
AC power is applied to the control logic, and if no faults are present the AC input contac­tor will also close. The POWER switch only controls a low voltage signal, and is not di­rectly connected to the main AC line. This low voltage control signal is wired in series
with two terminals on the rear panel. (4 position barrier strip) marked as
INTERLOCK/POWER ON (see Figure 5-3).

The INTERLOCK/POWER ON terminals at the rear of the unit must be jumpered or
wired to a remote switch or contactor. Both the remote contacts and the front panel
switch must be closed for the unit to turn on.

Once the unit is turned on using the front panel POWER switch, the internal control logic
begins a complete check of all operational circuits. The check includes all functions dis­played on the front panel LED indicator lights. The check sequence begins with a tests
of all the lights by switching them all on for about one second to let the operator know
that all the LED's and the associated drivers are working, and that the power is applied
to the logic circuit and the internal self checks are underway.

Within 4 to 6 seconds after the POWER switch is closed and the self check sequence
commenced, all the tests are finished and the AC contactor automatically closes (a loud
‘thunk’ will be heard) applying AC power to the main power circuits, placing the power
supply in the READY state (FAULT LED is not illuminated). When READY the power
supply is considered to be armed and could be generating high voltage.

5.14 FRONT PANEL LAYOUT (S Model)

The 303S series power supply is equipped with a partially instrumented front panel fea­turing comprehensive status LEDs, and a power on switch. The 303S can only be oper­ated remotely via the control connector located on the rear panel (see Section 7.2).

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

1

2

MODEL 303

STATUS

HV ON
ENABLE
COOLANT FULL
AUTO DWELL
EOC FANFAIL
INT CLOSED

INHIBIT
LOAD FAULT
PURGE
EXCESSREVERSAL

COOLANT WARNING

CURRENT

FAULT
UVLO
INT OPEN
LOW LINE
IMBALANCE
HIGH LINE

5-9

110%10080 90706050403020100

POWER

ARC
COOLANT FAIL
OVERTEMP
OVERP
CLAMP
LINE FAULT

Figure 5-2 203/303S Front Panel Controls and Indicators

REF DESCRIPTION NOTE SECTION

1 Status LEDs Indicates the status of the power supply 5.10

2 Power switch Turns on/off power to auxiliary circuits 5.13

Table 5-2 Front Panel Controls and Indicators (S Model)

A description of the function of the LEDs and the power switch are given in sections

5.10 and 5.13 respectively.

5.15 REAR PANEL LAYOUT (L Models)

All of the interconnect and service connections for the 203/303L are located on the
power supply rear panel. Figure 5-3 shows the rear panel layout and location of the var­ious connectors.

83489011 Rev A

5-10

101211

12345

6

789

CONTROLS, INDICATORS, CONNECTORS

COOLANTWATERIN OUT

5

0

1

0

10

0

-30

inHg psi

0

1
5

20

0

30

0

0

2

kPa

!

438-528VAC

50/60 Hz

TB2 1 2 3 4

INTERLOCK/POWERON

A B C N GND
1 2 3 4 5

0

-10

0
5

-

INHIBITREMOTE

HV OUTPUT

COOLANT

-20

-

1

0

0

SLAVE

TB 1 ACINPUT

Figure 5-3 203/303L Rear Panel Connections

REF DESCRIPTION NOTE SECTION

1 Inhibit BNC BNC socket for external inhibit signal 5.15.1

2 Coolant Water Inlet ¼ NPT male threaded coolant inlet pipe 5.15.2
3 HV Output Connector HV output connector 5.15.3
4 Coolant Water Out ¼ NPT male threaded coolant outlet pipe 5.15.2
5 Cooling Fan Input section cooling fan 5.15.4

Interlock/Power On

6

Terminal strip
7 Remote connector Remote control interface 25 pin D-sub plug 5.15.6
8 Slave connector Slave interface 25 pin D-sub socket 5.15.7

External interlock and remote power on terminals 5.15.5

9 Coolant service valve Coolant valve to allow external tank fill 5.15.8

10 Tank pressure gauge HV tank pressure gauge 5.15.9
11 Safety ground 10-32 safety ground connection 5.15.10

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

REF DESCRIPTION NOTE SECTION

12 AC input terminal AC input terminal block 5.15.11

Table 5-3 203/303L Rear panel Functions

The function of each item in Table 5-3 is described in the following sections.

5.15.1 INHIBIT BNC (Ref 1)

The inhibit BNC input is a standard BNC socket that allows an external connection to a
pulse generator or control system and gives the user control of the power supply output
current. A logic 1 (10-15V) input will inhibit the supply (shuts off the output current) and
a logic 0 (ground or open) allows the supply to operate.

5.15.2 Coolant Water Inlet/Outlet (Ref 2/4)

¼ NPT male threaded pipe connection for external cooling water supply.

5.15.3 HV Output Connector

Connector socket for mating HV cable supplied with unit. The connector should be kept
clean and free from debris at all times.

5.15.4 Cooling Fan

Although the supply is water cooled a small cooling fan is used to cool the AC input cir­cuitry. Allow at least 5 inches of clearance and do not obstruct clear air flow around the
fan.

5-11

5.15.5 Interlock/Power On Terminal strip

Provides an external connection for the customer to allow both interlock and remote
power on functions to be controlled. The interlock terminals should be connected to any
safety interlock circuitry in the power supply installation. The remote power on terminals
are wired in series with the front panel ON switch, and can be used as a remote
ON/OFF switch if the front panel switch is left in the ON position. Note: The Inter-

lock/remote power on terminals are connected to floating chassis referenced
24VAC circuits and should never be connected to ground.

5.15.6 Remote connector

A 25 pin D-sub male connector that allows remote operation and monitoring of all power
supply functions when the unit is operated in REMOTE mode.

5.15.7 Slave connector

A 25 pin D-sub female connector that allows connection of a slave supply for increased
power operation.

5.15.8 Coolant service valve

External valve to allow topping up of the HV tank with coolant without the need for re­moving the top cover. Do not undertake this procedure without contacting the factory.

5.15.9 Tank pressure gauge

The tank pressure gauge indicates the pressure inside the coolant filled HV assembly.
With the power supply non operating at room temperature the gauge should show a
vacuum between 10 and 15in Hg. With the supply operating at full power the gauge
should read between 10 and 15PSI.

83489011 Rev A

5-12

10121112345679

CONTROLS, INDICATORS, CONNECTORS

5.15.10 Safety ground

10-32 safety ground screw installed in chassis. Should be used for additional safety
ground cable between supply and load circuit.

5.15.11 AC input terminal

Main AC input power terminal block see section 4.5 for further details.

5.16 REAR PANEL LAYOUT (S Models)

The 303S rear panel is almost identical to the 303L except these is no SLAVE or
INHIBIT BNC connector. If a number of units are to be connected in parallel, a daisy
chain type ribbon cable should be used to connect the supplies together. See section

7.3 for more details. Note: The numbers in Figure 5-4 refer to Table 5-3.

COOLANTWATERIN OUT

5

0

1

0

10

0

-30

inHg psi

0

1
5

20

0

30

0

0

2

kPa

!

438-528VAC

50/60 Hz

TB2 1 2 3 4

INTERLOCK/POWERON

A B C N GND
1 2 3 4 5

TB 1 ACINPUT

0

-10

0
5

-

INHIBITREMOTE

HV OUTPUT

COOLANT

-20

-

1

0

0

Figure 5-4 203/303S Rear Panel

83489011 Rev A

CONTROLS, INDICATORS, CONNECTORS

6. OPTIONAL FEATURES

The 203/303 series power supplies can be ordered with a number of optional features
which are explained in the following paragraphs.

6.1 LOW ENABLE OPTION (-EN)

All model 203/303 power supplies are equipped with an Enable or HV ON/OFF signal as
part of the remote interface. The standard ENABLE logic is a 12-15V signal turns HV
ON and 0V or open turns HV OFF. The EN option replaces the standard logic levels with
12-15V = HV OFF and 0V or Open = HV ON.

6.2 5V PROGRAMMING OPTION (-5V)

All model 203/303 power supplies are equipped with an Analog output voltage program
signal (V
to 0 to 100% of rated output voltage. The -5V option replaces the standard programming
so that 0-5V input delivers 0-100% of rated voltage at the output.

6.3 LATCHING OVERLOAD PROTECTION OPTION (-LP)

Standard model 203 and 303 series capacitor charging supplies are equipped with a
Load Fault or Overload protection circuit. This circuit causes the power supply to shut
down and indicate a LOAD FAULT condition if the output voltage does not reach the
programmed voltage within 500ms. The LOAD FAULT condition automatically clears af­ter a further 500ms, and the supply continues charging the load in 500ms intervals until
the programmed voltage is reached.

If the LP option is installed, the power supply still shuts down if the output voltage does
not reach the programmed voltage within 500ms, and the unit stays latched OFF indicat­ing a LOAD FAULT, which requires a reset signal before it will restart.

) as part of the remote interface. The program level is 0-10V input is equal

program

6-13

6.4 CONTINUOUS DC OPTION (-DC)

Model 203 or 303 power supplies equipped with the DC option should not be op­erated in parallel without first contacting the factory.

The DC option is specified when a 203 or 303 series power supply is used to power a
continuous DC load such as an RF tube, amplifier, DC-DC converter, or similar load
where the output voltage and current is continuously on.

All model 203 and 303 power supplies equipped with the DC option have –DC in the
product description, for example – 303L-50KV-POS-DC, 203L-7KV-POS-DC-400VAC.

203 and 303 -DC supplies are factory modified to have the OVERLOAD function defeat­ed, the output current adjusted for the appropriate power level (see power ratings in
Section 2.1), and a different final test procedure is employed.

When operating a model 203 or 303 power supply in a DC application, the customer
must add an external filter capacitor to the load circuit to ensure the output ripple is suit­able for the application. Model 203 and 303-DC power supplies must never be operated
into a resistive or other load without an external filter capacitor, otherwise damage may
occur to the High Voltage Output. For more details on continuous DC operation and filter
capacitor sizing and selection, please refer to our online App Note 505 which can be
downloaded at;

http://www.us.tdk-lambda.com/hp/pdfs/application%20notes/93008505rC.pdf

83489011 Rev A

6-14

Some examples of DC loads are;

Tetrode Amplifiers Klystrons
X-ray Tube Burn-In Gyrotrons
DC-DC Converters Radar Systems
Hard Tube Modulators

6.5 REMOTE SENSE (-RS)

The remote sense option can be specified when the output voltage accuracy or stability
requirements of the application cannot be met by the internal voltage sensing compo­nents. It allows the power supply’s output voltage sense signal to be provided by an ex­ternal voltage divider.

Power supplies equipped with the remote sense option have an additional BNC con­nector located on the rear panel adjacent to remote/slave control connectors. The BNC
connector is labeled HVS (High Voltage Sense).

The typical remote sense input is configured for a 1000:1 divide ratio external probe,
and has a 1M input impedance with a capacitance of 20-50pF. Other divide ratios and
impedances can be configured upon request. Contact the factory to confirm the exact
remote sense input requirements.

The remote sense input must be connected for correct operation of the power supply. If
the supply is operated without the remote sense signal connected, the output will not be
uncontrolled, but it will deliver approximately 10% higher output than the programmed
voltage.

CONTROLS, INDICATORS, CONNECTORS

83489011 Rev A

OPERATING INSTRUCTIONS

7. OPERATING INSTRUCTIONS

The 203/303 power supply is designed for operation in two modes. The first mode is lo­cal, where the power supply is operated using the front panel controls. Local operation is
only possible with the L model supply. The second mode is remote, where control sig­nals are passed via the 25pin remote connector. Remote operation is possible with all
203/303 model power supplies (L and S).

7.1 LOCAL OPERATION (203/303L only)

The model 203/303L has full front panel instrumentation and controls for use in labora­tory, prototype or OEM systems. The front panel controls include power on/off, re­mote/local keyswitch, HV on/off push-buttons, output voltage adjust, digital voltage and
current meters, and status indicators. An internal AC contactor is included which is con­trolled by the front panel power switch and the interlock terminals on the rear of the unit.
A BNC connector is provided on the rear panel for easily connecting a pulsed INHIBIT
signal when operating from the front panel. The model 203/303L can be operated as a
"master" unit in parallel with several model 203/303S or "slave" units for increased out­put power. Refer to Section 7.3 Parallel Operation.

After all external AC input, cooling, and load connections have been correctly made and
the high voltage cable properly terminated at the load, the power supply is ready to op­erate.

7-15

NOTE: The 203/303 series power supplies are not designed to operate into an open cir-

cuit load. Operating the supply with no external load capacitor could result in damage to
the high voltage output section and would void the warranty.

CAUTION

HIGH VOLTAGES MAY POTENTIALLY EXIST FROM

THIS POINT FORWARD

To operate the supply, follow the steps below;

1. Turn "HV Level Adjust" control fully CCW.

2. Ensure key switch is in the OFF position.

3. Turn on AC power, "POWER" switch.

The fan should be running. The front panel LED's will light and reset. The INHIBIT
and HV OFF LEDs should be illuminated. The END OF CHARGE LED may or may
not be on at this time. The INTERLOCK OPEN LED should be extinguished.

4. Turn key switch to the LOCAL position. Push the HV ON button, slowly turn the high

voltage adjust level to the desired output voltage. Note that at any point in stopping
the adjustment, the end of charge light will illuminate.

5. When the desired output voltage is reached, the load switch should now operate and

the power supply will begin charging the load at the rated power level.

After the load has been discharged the AUTOINHIBIT function will inhibit the output cur­rent for a short time before the load is re-charged. Alternatively an external inhibit signal
can be connected to the rear panel mounted BNC connector.

83489011 Rev A

7-16

OPERATING INSTRUCTIONS

To turn OFF the power supply depress the OFF button or use the INHIBIT input. Open­ing the interlock terminals will also cause the power supply to turn off. In this case the
unit can only be turned back on after the interlock has been closed and the OFF button
depressed to RESET the fault. Any other fault occurring in the internal protection cir­cuitry will interrupt the power supply's operation causing it to turn OFF.

For a full explanation of each control and indicator refer to Section 5.

7.2 REMOTE OPERATION (All models)

All 203/303 models are easily controlled through the 25 pin sub D-type remote interface
connector located on the rear panel. The minimum required signals for remote control
operation are; HV ON/OFF, Vprogram and GND. The remaining signals are provided for
status monitoring and fault diagnosis, or more sophisticated control methodologies. A
description of each signal is shown in Table 7-1, with a schematic showing a suggested
remote interface circuit shown in Figure 7-1.

Pin Signal Name I/O Description

1 +15VDC O +15V 125mA max. May be used to power LEDs etc in a remote control

circuit.
2 FAULT O Open collector. Low impedance when FAULT is present.
3 INBIHIT LED O Open collector. Low impedance when power supply is inhibited from

charging.
4 END OF CHARGE

LED
5 EXCESS REVERSAL O Open collector. Low impedance when EXCESS REVERSAL is sensed.
6 HV ON O Open collector. Low impedance when HV OUTPUT is ON
7 OVER VOLTAGE O Open collector. Low impedance when output OVERVOLTAGE is

8 ARC O Open collector. Low impedance when ARC is detected in the HV tank.
9 AUTOINHIBIT I 0-10V signal programs AUTOINHIBIT period between 500us and 10ms

10 HV ON/OFF I 15V=On, groundor open =Off. Also used to reset most latching faults

11 Vprogram I
12 CURRENT METER

OUTPUT

13 ANALOG OUT O
14 INTERLOCK LED O Open collector. Low impedance when external interlock circuit is open

15 INPUT POWER

FAULT LED

16 AUTOINHIBIT LED O Open collector. Low impedance when AUTOINHIBIT is activated.
17 LOAD FAULT LED O Open collector. Low impedance when LOAD FAULT condition occurs.

18 Iprogram I 0-10V signal programs the output current between 0 and 100% of rated

O Open collector. Low impedance when power supply reaches End of

Charge.

sensed.

in range1 (factory preset) or 50s to 1ms in range 2.

by cycling from On to Off. Input impedance >1M
0-10V = 0-100% of rated output voltage. Input impedance >1M

O Output current , 0-10VDC = 0-100% of rated current.

0-10V (±1%) Analog of output voltage waveform. Impedance 1k

or power supply top cover is removed.

O Open collector. Low impedance when input power fault occurs (high,

imbalance, interlock). When signal is activated the supply will latch off.

Load fault is a non-latching fault and will self reset after approximately
500ms (for models without LP option).

current

83489011 Rev A

OPERATING INSTRUCTIONS

Pin Signal Name I/O Description

19 COOLANT FAULT O Open collector. Low impedance when the internal over temperature

sensor is activated. The power supplyshuts off and will not restart until
the unit has returned to normal operating temperature. On occasion the
thermal sensor may be activated by residual heat after shut down. This
is normal and will reset itself within one minute after re-application of
power. This signal is logical OR connected with the COOLANT LOW

and FAN FAIL LEDs.
20 PURGE VALVE O Open collector. Low impedance when PURGE VALVE is activated.
21 DIGITAL GROUND Common ground connection for digital circuits.
22 INHIBIT INPUT I 5-15V Inhibits unit, open or ground allows operation. Input impedance

>10k
23 ANALOG GROUND Common ground connection for analog circuits.
24 +11VDC O

25 VOLTAGE METER

OUT

+11V 100mA max regulated for use with Vprogram and AUTOINHIBIT

program inputs

O +10VDC indicates max rated output voltage.

7-17

Table 7-1 203/303 Remote Interface Description

To operate an L model in remote mode the front panel keyswitch must be in the
REMOTE position. Before operating either a 203/303L or S in remote mode it must first
be connected to a master supply, or an appropriate control system.

7.2.1 Remote Control Signals

There are two recommended remote control signal arrangements for the 203/303 sup­ply. The first utilizes the 203/303 inbuilt AUTOINHIBIT function, and the second utilizes
a customer supplied INHIBIT signal. Each case is detailed in the following sections.

7.2.2 Remote Operation with AUTOINHIBIT

The simplest remote control for the 203/303 series power supplies required only an ex­ternal HV ON/OFF signal (Pin 10), a Vprogram signal (Pin11), and ground (Pin 21/23).
The Vprogram signal should be set to the appropriate analog level that corresponds to
the desired output voltage. For any given model with standard 10V programming, the
program voltage (in Volts) is given by;

Vprogram = Vcharge x 10

Vrated

Note: The program voltage should never be greater than 10V.

Once the desired Vprogram signal has been set by the remote control system, the sup­ply can be turned on. The first step is to turn on the AC power switch on the supply front
panel, or close the remote power on the rear panel if it is being used.

With the supply AC power turned-on and the Vprogram set to the desired level, the HV
ON signal can be asserted (Pin 10=15V). As soon as the HV ON signal is high the out­put of the supply is energized and the load will begin charging.

83489011 Rev A

7-18

AUTOINHIBIT

ARC

AUTOINHIBIT

+15V

ANALOG GND

V OUT (PEAK)

(BNC)

3 TO20V

ANALOG WAVEFORM OUT

AUTOINHIBIT

ARC

AUTOINHIBIT

+15V

ANALOG GND

V OUT (PEAK)

(BNC)

3 TO20V

ANALOG WAVEFORM OUT

OPERATING INSTRUCTIONS

1

1

2

2

3

3

4

4

5

5

6

6

7

7

INTERLOCK

INTERLOCK

14

14

15

15

16

16

17

17

18

18

19

19

20

20

OPEN

OPEN

READY

READYREADY
INPUT POWER FAULT

INPUT POWER FAULT
INHIBIT

INHIBIT

END OF CHARGE

END OF CHARGE
OVERLOAD

OVERLOAD
EXCESS REVERSAL

EXCESS REVERSAL
IPROGRAM

HV ON

HV ON
COOLANT LOW/FAULT
OVER VOLTAGE

OVER VOLTAGE

PURGE VALVE

PURGE VALVE



5k5k

8

8

21

DIGITAL GROUND

21

DIGITAL GROUND

9

9

22

INHIBIT

22

INHIBIT
ENABLE/RESET

10

10

11

11

12

12

13

13

ENABLE/RESET

23

23

HV ADJUST

HV ADJUST

24

+11 VOLTS DC (REG)

24

+11 VOLTS DC (REG)

I OUT

I OUT

25

25

METERS: 10V=FULL SCALE

METERS: 10V=FULL SCALE

5k5k





5k

5k

+ -

+ -+ -



OFF ON

OFF ON

+ -

+ -+ -

TO SCOPE OR OTHER CIRCUIT

TO SCOPE OR OTHER CIRCUIT

INHIBIT IN

INHIBIT IN

INHIBIT

(OR USE BNC INPUT)

INTERLOCK

INTERLOCK

INHIBIT

INHIBIT

REF TOGND

REF TOGND

POWER

POWER

Figure 7-1. External remote interface circuit.

The load will continue to charge at full current until the supply reaches End Of Charge
(EOC - output voltage=program voltage). After the supply reaches EOC the load voltage
is maintained at the programmed level by short bursts of charge current. When the load
is discharged the AUTOINHIBIT circuit automatically creates an internal inhibit signal

83489011 Rev A

OPERATING INSTRUCTIONS

AUTOINHIBIT

AUTOINHIBIT

that shuts off the output current for a short period (1ms default). Note: the
AUTOINHIBIT period is programmable between 500s and 5ms via remote Pin 9. The
AUTOINHIBIT circuit will only detect load discharge when the output voltage falls from
between 20% and 100% of rated voltage to zero. If the load is discharged at below 20%
of rated voltage, the AUTOINHIBIT circuit will not activate and the supply will continue to
deliver current.

When the AUTOINHIBIT period is over, the supply will begin to recharge the load and
the cycle repeats. The supply will continue to operate in this manner until HV OFF is as­serted (PIN 10=0V). See Figure 7-2 for typical remote interface waveforms.

15V

15V

ENABLE

ENABLE

0V

0V

10V

10V

7-19

V

V

ANALOG

ANALOG

0V

0V

0V

0V

Figure 7-2 Remote Interface waveforms for 303 operated with AUTOINHIBIT

7.2.3 Remote Operation with INHIBIT

Although the AUTOINHIBIT signal offers the user the simplest remote programming
method for the 203/303, the INHIBIT signal is commonly used to control the output cur­rent and offers greater flexibility, allowing the user to minimize the time at which the load
capacitor remains at high voltage. The INHIBIT signal should be asserted (Pin 22=5­15V) prior to activating the HV ON signal. Once HV ON has been set, then INHIBIT can
be removed (Pin 22=0V), and the supply will begin charging the load. A few 10s of mi­croseconds before the load switch is triggered to close, the INHIBIT signal should be
asserted to turn-off the output current, and aid in switch recovery. Once the load switch
has recovered from the discharge event, INHIBIT can be removed and the load re­charged. A typical set of remote control waveforms is shown in Figure 7-3.

83489011 Rev A

7-20

15V

15V

ENABLE

ENABLE

0V

0V

10V

10V

V

V

ANALOG

ANALOG

0V

0V

15V

15V

OPERATING INSTRUCTIONS

INHIBIT

INHIBIT

0V

0V

Figure 7-3 Remote Interface waveforms for 303 operated with INHIBIT

7.3 Parallel Operation

The 203/303 series capacitor charging power supplies are constant current sources,
and can be connected in parallel for applications requiring increased power. To operate
more than one unit in parallel all that is required is a parallel control cable, and to con­nect the HV output cables together at the load. Either model 203/303L or 203/303S or
any combination of units can be operated in parallel. If at least one model 203/303L is
connected in a parallel system then the system can be operated without an external
controller by using the 203/303L as a master supply in local mode.

If status, voltage, and current displays/measurements are required individually for each
supply in a parallel system then the ‘daisy chain’ control cable is not appropriate, and
each unit must be individually connected to a remote control system.

7.3.1 Parallel system comprising 203/303L supplies

If all of the parallel units are L model supplies then one unit should be operated as the
master supply in either local or remote mode. The other parallel supplies can be con­nected to the SLAVE 25-pin D-sub connector on the master unit rear panel (refer to Fig­ure 7-4). The SLAVE control cable can be a pin-to-pin ribbon or other cable that is ‘daisy
chained’ to the REMOTE connector on each of the SLAVE supplies. Note: The master

83489011 Rev A

OPERATING INSTRUCTIONS

203/303L supply in a parallel system only displays the status, voltage, and current out­put for that unit, not for the entire system. The slave supplies will also display the volt­age and current only for that specific unit.

7.3.2 Parallel system comprising both 203/303L and 203/303S supplies

For a system comprising both 203/303L and S units, a single L model should be operat­ed as a master in either local or remote mode. The other parallel supplies can be con­nected to the SLAVE 25-pin D-sub connector on the master unit rear panel (refer to Fig­ure 7-4). The SLAVE control cable can be a pin-to-pin ribbon or other cable that is ‘daisy
chained’ to the REMOTE connector on each of the SLAVE supplies.

7.3.3 Parallel system comprising 203/303S supplies

A system comprising only model 203/203S supplies must be operated from a control
system. The control system should be connected using a pin-to-pin ribbon or other cable
that is ‘daisy chained’ to the REMOTE connector on each of the 203/303S supplies in
the system.

7-21

From Optional Control System

From Optional Control System

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

-20
30

30

30

30

30

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

COOLANT

COOLANT

COOLANT

COOLANT

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

COOLANT

COOLANT

COOLANT

COOLANT

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

COOLANT

COOLANT

COOLANT

COOLANT

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

-20
30

30

30

30

30

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

-20

25

-20

25

-20

25

-20

25

-20

25

-20

25

30

30

30

30

30

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 ACINPU T

TB1 ACINPU T

TB1 ACINPU T

TB1 ACINPU T

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 ACINPU T

TB1 ACINPU T

TB1 ACINPU T

TB1 ACINPU T

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 ACINPU T

TB1 ACINPU T

TB1 ACINPU T

TB1 ACINPU T

5

5

5

5

5

5

5

5

5

5

5

5

From Control SystemFrom Optional Control System

From Control SystemFrom Optional Control System

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

-20
30

30

30

30

30

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

COOLANT

COOLANT

COOLANT

COOLANT

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

TOSLAVE REMOTE

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

REMOTE

REMOTE

REMOTE

REMOTE

COOLANT

COOLANT

COOLANT

COOLANT

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

REMOTE

REMOTE

REMOTE

REMOTE

COOLANT

COOLANT

COOLANT

COOLANT

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

-20
30

30

30

30

30

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

COOLANTWATER OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

-20

25

-20

25

-20

25

-20

25

-20

25

-20

25

30

30

30

30

30

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWERON

INTERLOCK/POWERON

INTERLOCK/POWERON

INTERLOCK/POWERON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWERON

INTERLOCK/POWERON

INTERLOCK/POWERON

INTERLOCK/POWERON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWERON

INTERLOCK/POWERON

INTERLOCK/POWERON

INTERLOCK/POWERON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

TB1 AC INPUT

5

5

5

5

5

5

5

5

5

5

5

5

COOLANTWATE R OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

-20
30

30

30

30

30

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

REMOTE

REMOTE

REMOTE

REMOTE

COOLANT

COOLANT

COOLANT

COOLANT

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

REMOTE

REMOTE

REMOTE

REMOTE

COOLANT

COOLANT

COOLANT

COOLANT

INHIBIT

INHIBIT

INHIBIT

INHIBIT

HVOUTPUT

HVOUTPUT

HVOUTPUT

HVOUTPUT

REMOTE

REMOTE

REMOTE

REMOTE

COOLANT

COOLANT

COOLANT

COOLANT

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

25

25

25

25

25

25

-20

-20

-20

-20

-20

-20
30

30

30

30

30

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

COOLANTWATE R OUTIN

5 10

5 10

5 10

5 10

5 10

5 10
0

0

0

0

0

0

15

15

15

15

15

15

20

20

20

20

20

20

-10

-10

-10

-10

-10

-10

-20

25

-20

25

-20

25

-20

25

-20

25

-20

25

30

30

30

30

30

30

-30

-30

-30

-30

-30

-30

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

PRESSUREGAUGE

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 ACINPUT

TB1 ACINPUT

TB1 ACINPUT

TB1 ACINPUT

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 ACINPUT

TB1 ACINPUT

TB1 ACINPUT

TB1 ACINPUT

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

TB2 1 2 43

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

INTERLOCK/POWER ON

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

A1B2C3N4GND

TB1 ACINPUT

TB1 ACINPUT

TB1 ACINPUT

TB1 ACINPUT

5

5

5

5

5

5

5

5

5

5

5

5

L Model Parallel System L & S Model Parallel System S Model Parallel System

L Model Parallel System L & S Model Parallel System S Model Parallel System

Figure 7-4 Parallel Operation Connections

83489011 Rev A

7-22

OPERATING INSTRUCTIONS

NOTES:

83489011 Rev A

APPLICATION NOTES

8. APPLICATION NOTES

The 203/303 series power supplies are extremely powerful high voltage power sources
and great care should be taken when connecting and operating these units. In order to
aid installation design and number of application notes have been produced to aid the
design engineer with certain load circuit component rating and selection. The latest ver­sions of these application notes are available for download at the Lambda web site
(http://www.us.tdk-lambda.com/hp/product_html/high_volt.htm).

The following App Notes were available at the time this manual was produced. These
documents are continually being improved and expanded to always check for the latest
revision on-line.

APP Note 500: Calculating Capacitor Charge Time
APP Note 502: Calculating AC Line Currents
APP Note 505: Charging units as Continuous Output DC Supplies
APP Note 507: Charging Large Load Capacitors
APP Note 509: What is Regulation and Repeatability?
APP Note 513: Power Factor Correction
APP Note 517: Protection Against Voltage Reversal

8-23

If there are any other application issues or questions that are not covered in these
Application Notes, or elsewhere in this manual, please do not hesitate to contact
the factory and our team of experienced HV application engineers.

Contact the Factory – We are here to help!

Tel: [phone]

Fax: [phone]

83489011 Rev A

010481200rev3.sch-1 - Tue Nov 13 15:40:12 2012

010481200rev3.sch-2 - Tue Nov 13 15:40:12 2012

010481300rev7.sch-1 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-2 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-3 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-4 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-5 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-6 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-7 - Thu Jun 21 13:40:36 2012

010481300rev7.sch-8 - Thu Jun 21 13:40:37 2012

010481300rev7.sch-9 - Thu Jun 21 13:40:37 2012

010481300rev7.sch-10 - Thu Jun 21 13:40:37 2012