Lambda 303 Series User manual

83-489-009 Rev A
OPERATOR MANUAL FOR
303 Series High Voltage
POWER SUPPLY
Document: 83-489-009 Rev A
LAMBDA AMERICAS
405 Essex Road, Neptune, NJ 07753
Tel: [phone]
Fax: [phone]
Web: www.us.tdk-lambda.com/hp

TABLE OF CONTENTS
83-489-009 Rev A
i
Table of Contents
1. GENERAL INFORMATION ............................................................................1-1
1.1 INTRODUCTION....................................................................................................1-1
1.2 203 and 303 OVERVIEW .......................................................................................1-1
1.2.1 APPLICATIONS: ............................................................................................................. 1-1
1.2.2 FEATURES ..................................................................................................................... 1-1
1.2.3 BENEFITS....................................................................................................................... 1-1
1.3 CAPACITOR CHARGING TECHNOLOGY ............................................................1-2
1.4 ADDITIONAL FEATURES:.....................................................................................1-2
1.5 SAFETY PRECAUTIONS.......................................................................................1-3
1.6 SCOPE OF THIS MANUAL....................................................................................1-3
1.7 MODEL NUMBER FORMAT ..................................................................................1-3
2. SPECIFICATIONS..........................................................................................2-5
2.1 Output Power .........................................................................................................2-5
2.2 Polarity……. ...........................................................................................................2-5
2.3 H.V. Return. ...........................................................................................................2-5
2.4 Pulse to Pulse Repeatability...................................................................................2-5
2.5 Rep Rate…………… ..............................................................................................2-5
2.6 Protection…………………………………………………………………………………..2-5
2.7 Input Power:...........................................................................................................2-6
2.8 Phase Configuration...............................................................................................2-6
2.9 Power Factor..........................................................................................................2-6
2.10 Efficiency…………………………………………………………………………………...2-6
2.11 AC Line Filtering.....................................................................................................2-6
2.12 Inrush Current ........................................................................................................2-6
2.13 Max. Discharge ......................................................................................................2-6
2.14 Physical Specifications...........................................................................................2-6
2.15 Cooling Water ........................................................................................................2-6
2.16 Water Fittings.........................................................................................................2-7
2.17 Weight…………......................................................................................................2-7
2.18 Shock and Vibration ...............................................................................................2-7
2.19 Shipping……………………………………………………………………………………2-7
2.20 Air Temperature Range..........................................................................................2-7
2.21 Humidity……………................................................................................................2-7
2.22 Altitude……….........................................................................................................2-7
3. OUT-OF-BOX-INSPECTION..........................................................................3-9
3.1 VISUAL INSPECTION............................................................................................3-9
3.2 ELECTRICAL INSPECTION...................................................................................3-9
3.2.1 TEST 1 ............................................................................................................................ 3-9
3.2.2 TEST 2 ............................................................................................................................ 3-9
3.3 CONTACTING LAMBDA AMERICAS CUSTOMER SERVICE .............................3-10
3.4 RETURNING DEFECTIVE UNITS .......................................................................3-10
4. INSTALLATION............................................................................................4-11
4.1 19-INCH RACK MOUNTING ................................................................................4-11
4.2 VENTILATION REQUIREMENTS ........................................................................4-12
4.3 WATER COOLING REQUIREMENTS .................................................................4-12
4.4 ORIENTATION.....................................................................................................4-12
4.5 AC POWER CONNECTION.................................................................................4-13
4.6 CONNECTING THE HIGH VOLTAGE OUTPUT..................................................4-14

5. CONTROLS, INDICATORS, CONNECTORS................................................5-1
5.1 FRONT PANEL LAYOUT (L Model) .......................................................................5-1
5.2 Power Supply Status LEDs (Ref 1).........................................................................5-2
5.2.1 Operating Status LEDs.................................................................................................... 5-2
5.2.1.1 READY (Normally ON) .................................................................................................... 5-2
5.2.1.2 LINE (Normally ON)......................................................................................................... 5-2
5.2.1.3 INHIBIT (Normally ON).................................................................................................... 5-2
5.2.1.4 END OF CHARGE (Normally OFF)................................................................................. 5-2
5.2.1.5 AUTO DWELL (Normally OFF) ....................................................................................... 5-3
5.2.1.6 INTERLOCK CLOSED (Normally ON) ............................................................................ 5-3
5.2.2 HV Status LEDs .............................................................................................................. 5-3
5.2.2.1 EXCESS REVERSAL (Normally OFF) ............................................................................ 5-3
5.2.2.2 OVERLOAD (Normally OFF)........................................................................................... 5-3
5.2.2.3 OVERVOLTAGE (Normally OFF).................................................................................... 5-4
5.2.2.4 ARC (Normally OFF) ....................................................................................................... 5-4
5.2.2.5 NCR (Normally OFF - not used) ...................................................................................... 5-4
5.2.3 COOLANT status LEDs................................................................................................... 5-4
5.2.3.1 FULL (Normally ON)........................................................................................................ 5-4
5.2.3.2 WARNING (Normally OFF) ............................................................................................. 5-4
5.2.3.3 LOW (Normally OFF)....................................................................................................... 5-4
5.2.3.4 TEMP (Normally OFF)..................................................................................................... 5-5
5.2.3.5 PURGE PUMP (Normally OFF)....................................................................................... 5-5
5.2.4 INPUT POWER status LEDs (External Faults)............................................................... 5-5
5.2.4.1 FAULT (Normally OFF).................................................................................................... 5-5
5.2.4.2 HIGH (Normally OFF)...................................................................................................... 5-5
5.2.4.3 IMBALANCE (Normally OFF) .......................................................................................... 5-5
5.2.4.4 LOW (Normally OFF)....................................................................................................... 5-6
5.2.4.5 INTERLOCK OPEN (Normally OFF) ............................................................................... 5-6
5.2.5 INDICATOR TROUBLESHOOTING ............................................................................... 5-6
5.3 LOCAL VOLTAGE CONTROL (Ref 2) ...................................................................5-7
5.4 OUTPUT VOLTAGE METER (Ref 3) .....................................................................5-7
5.5 OUTPUT CURRENT METER (Ref 4).....................................................................5-7
5.6 TRIGGER push button (Ref 5) ...............................................................................5-7
5.7 KEY LOCK CONTROL (Ref 6) ...............................................................................5-7
5.7.1 OFF Position ................................................................................................................... 5-8
5.7.2 LOCAL Position............................................................................................................... 5-8
5.7.3 REMOTE Position ........................................................................................................... 5-8
5.7.4 REMOTE/LOCAL/ENABLE LEDs ................................................................................... 5-8
5.8 HV OFF/Reset (Ref 7)............................................................................................5-8
5.9 HV ON (Ref 8)........................................................................................................5-9
5.10 AC POWER (Ref 9)................................................................................................5-9
5.11 FRONT PANEL LAYOUT (S Model).......................................................................5-9
5.12 REAR PANEL LAYOUT (L Models)......................................................................5-10
5.12.1 INHIBIT BNC (Ref 1)..................................................................................................... 5-12
5.12.2 Coolant Water Inlet/Outlet (Ref 2/4).............................................................................. 5-12
5.12.3 HV Output Connector .................................................................................................... 5-12
5.12.4 Cooling Fan ................................................................................................................... 5-12
5.12.5 Interlock/Power On Terminal strip................................................................................. 5-12
5.12.6 Remote connector......................................................................................................... 5-12
5.12.7 Slave connector............................................................................................................. 5-12
5.12.8 Coolant service valve .................................................................................................... 5-12
5.12.9 Tank pressure guage .................................................................................................... 5-12
5.12.10 Safety ground ................................................................................................................ 5-13
5.12.11 AC input terminal........................................................................................................... 5-13
5.13 REAR PANEL LAYOUT (S Models) .....................................................................5-13

TABLE OF CONTENTS
83-489-009 Rev A
iii
6. OPERATING INSTRUCTIONS.....................................................................6-15
6.1 LOCAL OPERATION (203/303L only)..................................................................6-15
6.2 REMOTE OPERATION (All models) ....................................................................6-16
6.2.1 Remote Control Signals ................................................................................................ 6-17
6.2.2 Remote Operation with AUTODWELL.......................................................................... 6-17
6.2.3 Remote Operation with INHIBIT.................................................................................... 6-19
6.3 Parallel Operation.................................................................................................6-20
6.3.1 Parallel system comprising 203/303L supplies ............................................................. 6-20
6.3.2 Parallel system comprising both 203/303L and 203/303S supplies.............................. 6-21
6.3.3 Parallel system comprising 203/303S supplies............................................................. 6-21
7. APPLICATION NOTES ................................................................................7-23
List of Figures
FIGURE 3-1 203/303L FRONT VIEW ............................................................................................................4-11
FIGURE 3-2 203/303 REAR VIEW................................................................................................................4-12
FIGURE 3-3. AC INPUT TERMINAL BLOCK ....................................................................................................4-13
FIGURE 3-4 TYPICAL LOAD CIRCUIT CONNECTION .......................................................................................4-15
FIGURE 4-1. 203/303L FRONT PANEL CONTROLS AND INDICATORS................................................................5-1
FIGURE 4-2 203/303S FRONT PANEL CONTROLS AND INDICATORS ..............................................................5-10
FIGURE 4-3 203/303L REAR PANEL CONNECTIONS .....................................................................................5-11
FIGURE 4-4 203/303S REAR PANEL ...........................................................................................................5-13
FIGURE 5-1. EXTERNAL REMOTE INTERFACE CIRCUIT. ..................................................................................6-18
FIGURE 5-2 REMOTE INTERFACE WAVEFORMS FOR 303 OPERATED WITH AUTODWELL .............................6-19
FIGURE 5-3 REMOTE INTERFACE WAVEFORMS FOR 303 OPERATED WITH INHIBIT........................................6-20
FIGURE 5-4 PARALLEL OPERATION CONNECTIONS.......................................................................................6-22
List of Tables
TABLE 1-1 MODEL DESCRIPTION FORMAT .....................................................................................................1-4
TABLE 3-1 RECOMMENDED AC INPUT CABLE ..............................................................................................4-14
TABLE 4-1 FRONT PANEL CONTROLS AND INDICATORS (L MODEL) .................................................................5-2
TABLE 4-2 FRONT PANEL INDICATOR TROUBLESHOOTING CHART...................................................................5-6
TABLE 4-3 FRONT PANEL CONTROLS AND INDICATORS (S MODEL)...............................................................5-10
TABLE 4-4 203/303L REAR PANEL FUNCTIONS............................................................................................5-11
TABLE 5-1 203/303 REMOTE INTERFACE DESCRIPTION ...............................................................................6-17

GENERAL INFORMATION
83-489-009 Rev A
1-1
1. GENERAL INFORMATION
1.1 INTRODUCTION
Lambda Americas 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 sys-
tems, modulators, and pulse forming networks. They can also be used in many continu-
ous 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 op-
eration, HV ON/OFF push-button switches, and a counting dial for output voltage ad-
justment. 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
1.2.1 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.

GENERAL INFORMATION
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 pro-
grammed 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, labora-
tory 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. 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. When the 203 and 303 supplies are operated in continuous applications it is
often necessary to add an external capacitor between the load and ground to improve
the ripple performance of the unit. Consult the factory for details of the type and size of
capacitor.
1.4 ADDITIONAL FEATURES:
•Internal contactor and fuses for AC disconnect and protection
•Standard AC power and control connectors
•Documentation Manual Including -
Installation
Check out
Block diagram
Suggested remote interfaces and control circuits

GENERAL INFORMATION
83-489-009 Rev A
1-3
•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 prece-
dence if conflicts exist. Please take care to refer to the correct information for your
unit.
1.5 SAFETY PRECAUTIONS
All 203 and 303 power supplies are designed to mini-
mize the risk of fire or shock hazard. This instrument
received comprehensive mechanical and electrical in-
spection 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 ca-
ble. Therefore, the cover may not be removed by the user (see Warranty in preamble sec-
tion 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. Ensure all covers are in place and securely fastened before switching ON the AC power.
2. 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.
3. Use extreme caution when connecting AC input power, and never apply the incorrect in-
put voltage, refer to ratings label.
4. Use extreme caution when connecting the high voltage output cable to the load.
5. Ensure all load capacitors are completely discharged prior to connection. Never handle
the output cable when the power supply is operating.
6. Never attempt to operate the power supply in any manner not described in this manual.
7. Never remove DANGER and WARNING labels from the power supply. Replace lost or
damaged labels immediately.
8. The power supply should only be serviced by Lambda Americas factory authorized per-
sonnel.
1.6 SCOPE OF THIS MANUAL
This manual is used for installing and operating the 203 and 303 Series Power Supply.
Suggestions and requirements for connecting AC power, load cables and signal cables
are given. Various operating modes and programming modes are described.
1.7 MODEL NUMBER FORMAT
The model numbering system for the 203 and 303 Series power supply includes sym-
bols for features and options. They are separated by dashes.

GENERAL INFORMATION
1-4
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 dependant upon the installation and system re-
quirements. 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 Lambda Americas. Special options are typically shown as a four-digit suffix to the
model number.
203/303(model) - (voltage) - (polarity) - (mode) - (input) - (options)
Model (L, or S)
Output Voltage Range kV
POS or NEG Polarity
Note 1. See Input power table specification section 4.5 for more details.
Table 1-1 Model Description Format
OPTIONS
5V Programming 5V
Low Enable EN
Custom cable
length xxxx
Other options xxxx
AC INPUT VOLTAGE(1)
Input Suffix
Standard 432-528 VAC,
50-60 Hz
3φ(88A Max) Blank
400VAC
Option
360-440 VAC,
50-60 Hz
3φ(100A Max) 400VAC
208VAC
Option
180-264 VAC,
50-60 Hz
3φ (95A Max) 208VAC
Mode
Standard Capacitor
Charging Blank
DC Continuous
DC Operation DC

SPECIFICATIONS
83-489-009 Rev A
2-5
2. SPECIFICATIONS
2.1 Output Power
MAXIMUM OUTPUT POWER RATING
AC INPUT
VOLTAGE MODE
MODEL 203 MODEL 303
Cap Charging 20kJ/sec av, 25kJ/sec pk 30kJ/sec av, 37.5kJ/sec pk
432-528 VAC,
50-60 Hz, 3φContinuous DC 30kW 50kW
Cap Charging 20kJ/sec av, 25kJ/sec pk 25kJ/sec av, 32.5kJ/sec pk
360-440 VAC,
50-60 Hz, 3φContinuous DC 30kW 40kW
Cap Charging 20kJ/sec av, 25kJ/sec pk Not Available
180-264 VAC,
50-60 Hz, 3φContinuous 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).
2.5 Rep Rate
Single shot to 200 Hz. Lower regulation for 200Hz to 1 kHz rates.
2.6 Protection
Output over voltage
Output short circuit
AC input power failure
AC input power out of range
Excess voltage
Over and under temp

SPECIFICATIONS
2-6
2.7 Input Power:
MAXIMUM INPUT CURRENT (1)
AC INPUT VOLTAGE MODEL 203 MODEL 303
40A/Phase (Cap charging) 60A/Phase (Cap charging)
432-528 VAC,
50-60 Hz, 3φ60A/Phase (Continuous DC) 98A/Phase (Continuous DC)
47A/Phase (Cap charging) 71A/Phase (Cap charging)
360-440 VAC,
50-60 Hz, 3φ71A/Phase (Continuous DC) 94A/Phase (Continuous DC)
94A/Phase (Cap charging) Not Available
180-264 VAC,
50-60 Hz, 3φ94A/Phase (Continuous DC) Not Available
Note (1): Refer to section 2.1 for output power rating
2.8 Phase Configuration
Wye or Delta, any rotation, separate ground.
Note: neutral connection is required for 360-440VAC input configuration, Neutral current
2A or less.
2.9 Power Factor
0.9 at full load and nominal AC line
2.10 Efficiency
85% at full load and nominal AC line
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.

SPECIFICATIONS
83-489-009 Rev A
2-7
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 packing 2.0 g
2.19 Shipping
Gross weight with packing material: 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
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

SPECIFICATIONS
2-8
NOTES:

OUT-OF-BOX-INSPECTION
83-489-009 Rev A
3-9
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 in-
terface.
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 ca-
ble is securely inserted and connected.

OUT-OF-BOX-INSPECTION
3-10
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
Lambda Americas Customer Service for assistance.
The supply and the FC-72 filled HV assembly should not be opened unless advised by
Lambda Americas personnel. The FC-72 filled HV tank has been cleaned and the her-
metically sealed at the factory, opening the supply or the assembly will void the factory
warranty, and may compromise performance.
3.3 CONTACTING 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: [email protected]
Fax: [phone]
or online at http://www.us.tdk-lambda.com/hp/RMA_request.htm
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 Lambda Americas, the customer may be granted permission to break
the warranty seal and open the chassis covers. Customer Service shall confirm the per-
mission 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 bro-
ken seal.
3.4 RETURNING DEFECTIVE UNITS
The procedure for returning defective products is given in section 3.3 of this manual.

INSTALLATION
83-489-009 Rev A
4-11
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 environ-
mental 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.
      
  


  
  
     
      
  
  
 



  

 
    



  

   
    
A.L.E. SYSTEMS
MODEL 203 / 303 L
   
  
 
   
  
 


   

  

   
19.0”
(483mm)
12.25”
(311mm)
      
  


  
  
     
      
  
  
 



  

 
    



  

   
    
A.L.E. SYSTEMS
MODEL 203 / 303 L
   
  
 
   
  
 


   

  

   
19.0”
(483mm)
12.25”
(311mm)
Figure 4-1 203/303L Front View

INSTALLATION
4-12
  




  
   












-30
-20
-10
0510
15
20
25
30
6.00”
(152mm)
3.5”
(89mm)
4.21”
(107mm)
11.56”
(294mm)
4.52”
(115mm)
17” (432mm)
19” (482mm)
  




  
   












-30
-20
-10
0510
15
20
25
30
-30
-20
-10
0510
15
20
25
30
6.00”
(152mm)
3.5”
(89mm)
4.21”
(107mm)
4.21”
(107mm)
11.56”
(294mm)
4.52”
(115mm)
17” (432mm)
19” (482mm)
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 air-
flow, 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.
4.3 WATER COOLING REQUIREMENTS
Water with a flow rate at 2 US gallons per minute (7.6litres/min) having an exit tempera-
ture of 15 to 35°C is required to cool the instrument. This is required to maintain the al-
lowable tank temperature range of 15 to 48°C. This temperature range may be main-
tained by running normal tap water through the power supply at the rate of 1 to 2 US
gpm. Chilled water should not be used. ( - If the supply is to be stored at tempera-
tures 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 quar-
ter 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.

INSTALLATION
83-489-009 Rev A
4-13
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
Lambda Americas standard warranty.
The customer’s AC power line connects to the 203/303 via a UL/CSA approved 5 posi-
tion 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 ex-
treme 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.
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 or 208V configuration. For models with the 400VAC input configura-
tion (360-440VAC) the neutral wire must be connected to terminal marked N. The power
connections are not phase rotation sensitive, so any phase can be connected to any of
the AC inputs.
Figure 4-3. AC Input Terminal Block
A
1
B
2
C
3
N
4
5
TB1 AC INPUT
A
1
B
2
C
3
N
4
5
TB1 AC INPUT

INSTALLATION
4-14
If the power supply was purchased with the 400VAC input configuration, in
addition to the three phases, the neutral wire must be connected to
terminal marked N. Failure to connect the Neutral wire in a 400VAC unit
may result in damage to the supply. Neutral current is 2A or less.
RECCOMENDED AC INPUT CABLE SIZE
AC INPUT
VOLTAGE MODE
MODEL 203 MODEL 303
Cap Charging 5 AWG 4 AWG
432-528 VAC,
50-60 Hz, 3φContinuous DC 4 AWG 3 AWG
Cap Charging 5 AWG 4 AWG
360-440 VAC,
50-60 Hz, 3φContinuous DC 4 AWG 3 AWG
Cap Charging 3 AWG Not Available
180-264 VAC,
50-60 Hz, 3φContinuous DC 3 AWG Not Available
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
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 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 Corn-
ing 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 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. out-
put 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-
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