Page 1
ACX SERIES
AC POWER SOURCES
OPERATION
MANUAL
Page 2
PAGE LEFT INTENTIONALLY BLANK FOR HARDCOPY VERSIONS OF THIS DOCUMENT
Page 3
THIS MANUAL ASSIGNED TO S/N :
ACX-SERIES
OPERATION MANUAL
FOR THE
MODELS
110ACX
115ACX
118ACX
PPS PART NO. 150118-10
THE INFORMATION CONTAINED
IN THIS MANUAL IS PROPRIETARY TO
PACIFIC POWER SOURCE, INC.
AND MAY NOT BE COPIED OR REPRINTED
WITHOUT ITS EXPRESSED WRITTEN CONSENT.
PACIFIC POWER SOURCE, INC.
17692 Fitch Irvine, CA 92614
SIXTH EDITION
COPYRIGHT ©, PPS, JUNE 2014
Page 4
CERTIFICATION
PACIFIC POWER SOURCE CERTIFIES THAT THIS INSTRUMENT WAS
THOROUGHLY TESTED AND INSPECTED AND FOUND TO MEET OR
EXCEED ITS PUBLISHED SPECIFICATIONS WHEN IT WAS SHIPPED
FROM THE FACTORY.
LIMITED WARRANTY
Pacific Power Source (PPS) warrants each unit to be free from defects in
material and workmanship. For the period of two (2) years from the date of
shipment to the purchaser, PPS will either repair or replace, at its sole
discretion, any unit returned to its factory in Irvine, California or other factory
authorized service center. This warranty does not cover batteries. It does not
cover damage arising from misuse of the unit or attempted field modifications or
repairs. This warranty specifically excludes damage to other equipment
connected to this unit.
Upon notice from the purchaser within (30) days of shipment of units found to be
defective in material or workmanship, PPS will pay all shipping charges for the
repair or replacement. If notice is received more than thirty (30) days from
shipment, all shipping charges shall be paid by the purchaser. Units returned
on debit memos will not be accepted and will be returned without repair.
This warranty is exclusive of all other warranties, express or implied.
For a listing of local contacts or other information, please visit us online at:
www.pacificpower.com .
Page 5
TABLE OF CONTENTS
PAGE
GENERAL ................................................................................................................................................... 7
1
1.1 USING THIS MANUAL ..................................................................................................................... 7
1.2 SAFETY NOTICES .......................................................................................................................... 8
1.3 GENERAL PRODUCT DESCRIPTION .......................................................................................... 12
2 SPECIFICATIONS .................................................................................................................................... 13
2.1 ELECTRICAL SPECIFICATIONS .................................................................................................. 13
2.1.1 INPUT POWER REQUIREMENTS ..................................................................................................... 13
2.1.2 OUTPUT POWER ............................................................................................................................... 14
2.1.3 OUTPUT POWER FACTOR ............................................................................................................... 16
2.1.4 OUTPUT FREQUENCY ...................................................................................................................... 16
2.1.5 OUTPUT DISTORTION ...................................................................................................................... 16
2.1.6 OUTPUT LOAD REGULATION .......................................................................................................... 16
2.1.7 INPUT LINE REGULATION ................................................................................................................ 16
2.1.8 OUTPUT BANDWIDTH ....................................................................................................................... 16
2.1.9 LOAD TRANSIENT RESPONSE ........................................................................................................ 16
2.1.10 OUTPUT DC OFFSET ........................................................................................................................ 17
2.1.11 OUTPUT PROTECTION ..................................................................................................................... 17
2.1.12 OUTPUT CONTROL CHARACTERISTICS ........................................................................................ 17
2.1.13 OUTPUT ISOLATION ......................................................................................................................... 17
2.2 MECHANICAL SPECIFICATIONS ................................................................................................. 17
2.2.1 DIMENSIONS AND WEIGHT.............................................................................................................. 17
2.2.1 DIMENSIONS DRAWINGS ................................................................................................................. 18
2.2.2 INPUT POWER CONNECTION .......................................................................................................... 19
2.2.3 OUTPUT POWER CONNECTION ...................................................................................................... 19
2.2.4 CHASSIS SLIDE MOUNTS ................................................................................................................ 19
2.3 ENVIRONMENTAL SPECIFICATIONS ......................................................................................... 19
2.3.1 TEMPERATURE RANGE ................................................................................................................... 19
2.3.2 COOLING ........................................................................................................................................... 19
2.3.3 ALTITUDE ........................................................................................................................................... 19
2.3.4 POLLUTION DEGREE ........................................................................................................................ 19
2.3.5 THERMAL PROTECTION .................................................................................................................. 19
3 INSTALLATION ........................................................................................................................................ 20
3.1 CHASSIS PLACEMENT................................................................................................................. 20
3.1 CHASSIS PLACEMENT (CONTINUED) ............................................................................................ 21
3.2 OUTPUT RANGE CONFIGURATION ............................................................................................ 21
3.3 INPUT POWER CONNECTION ..................................................................................................... 22
3.3 INPUT POWER CONNECTION (CONTINUED) ................................................................................ 23
3.4 OUTPUT POWER CONNECTION ................................................................................................. 24
3.4 OUTPUT POWER CONNECTION (CONTINUED) ............................................................................ 25
3.5 REMOTE INTERFACE ................................................................................................................... 25
3.6 AUX I/O INSTALLATION ................................................................................................................ 26
3.7 EXTERNAL SENSE CONNECTION .............................................................................................. 27
5
Page 6
TABLE OF CONTENTS
PAGE
OPERATION ............................................................................................................................................. 28
4
4.1 FRONT PANEL CONTROLS ......................................................................................................... 28
4.2 INITIAL POWER-UP ...................................................................................................................... 29
4.3 ROUTINE POWER-UP .................................................................................................................. 30
4.4 SYSTEM TURN-OFF ..................................................................................................................... 30
4.5 SYSTEM SHUTDOWN .................................................................................................................. 31
4.5.1 SHUTDOWN CONDITIONS ...................................................................................................................... 31
4.5.2 RESETT ING SHU TDOWN FAULTS ......................................................................................................... 31
4.6 OUTPUT VOLTAGE FORMS ......................................................................................................... 32
4.7 AUDIBLE ALERT ........................................................................................................................... 32
4.8 CONSTANT CURRENT MODE ..................................................................................................... 33
4.9 CONSTANT VOLTAGE MODE (CURRENT PROTECTION MODE) ............................................. 34
4.10 POWER PROTECTION MODE ..................................................................................................... 36
5 MAINTENANCE ........................................................................................................................................ 37
5.1 MAINTENANCE INTERVAL........................................................................................................... 37
6 CALIBRATION .......................................................................................................................................... 38
6.1 CALIBRATION INTERVAL ............................................................................................................. 38
6.2 TEST EQUIPMENT REQUIREMENTS .......................................................................................... 38
6.3 CALIBRATION PROCEDURE ....................................................................................................... 38
6.3 CALIBRATION PROCEDURE ( CONT. ) ......................................................................................... 39
6.3.1 CONTROLLER CALIBRATION ........................................................................................................... 40
6.3.2 POWER SOURCE LOAD TEST ......................................................................................................... 40
7 SERVICE ................................................................................................................................................... 41
7.1 SERVICE PROCEDURE................................................................................................................ 41
7.2 SYSTEM LEVEL FACTORY PART NUMBERS ............................................................................. 41
7.3 SUB-ASSEMBLY AND CHASSIS COMPONENT PART NUMBERS ............................................ 41
INDEX ................................................................................................................................................................. 42
9 MODIFICATIONS AND CHANGE NOTICES .......................................................................................... 43
LIST OF ILLUSTRATIONS
FIGURE 1.3 ACX SERIES POWER SOURCE FRONT VIEW...……………….……..…….……………….6
FIGURE 2.1 INPUT CURRENT VS. OUTPUT POWER FOR MODEL 118ACX…………..……………....7
FIGURE 2.2 OUTPUT RATING CURVES BY MODEL…………………………………………………….....9
FIGURE 2.3 OUTLINE DRAWING ....…………………………….…………………...................................12
FIGURE 3.3 INPUT AND OUTPUT CONNECTIONS …………….…………………………………….……17
FIGURE 3.4 ACX-SERIES SYSTEM ARCHITECTURE ………………………………………….………….19
FIGURE 3.5 AUX I/O DB25S PIN OUT DIAGRAM.……………………………………………….………….20
FIGURE 3.6 EXTERNAL SENSE WIRING ……………………………………………………………………21
FIGURE 4.1 FRONT PANEL CONTROLS …………………………………………………………………….22
6
Page 7
Model
Maximum Output Power VA
110ACX
1000 VA
115ACX
1500 VA
118ACX
1800 VA
1 GENERAL
This manual provides information required to properly use one of the ACX Series AC Power
Source models. This is a general Operations Manual and it describes the operation of the basic
power source. Installation, operation, and calibration are the subjects covered.
At this time, there are three models available in the ACX Series:
All ACX models are configured with a digital UPC (Universal Programmable Controller).
Detailed operating instruction and control and metering specifications are described in the UPC
Series Operation Manual which is supplied with the unit.
SECTION 1 GENERAL
SECTION 1
GENERAL
1.1 USING THIS MANUAL
This manual provides instructions for installation and use of the ACX Series Power Source
equipment. For this reason, it is very important that the user reads sections 1 GENERAL
information, 3 INSTALLATION, and 4 OPERATION, prior to using this equipment. A thorough
understanding of these sections is required to safely and properly operate this equipment.
Section 2 lists the specifications of the equipment. Knowledge of this information is required to
gain maximum use of this equipment for a given application. The user is encouraged to read
this section in order to gain a deeper understanding of the capabilities of the ACX Power
Source.
Sections 5 and 6 list MAINTENANCE and CALIBRATION requirements of this equipment.
Refer to these sections when either maintenance or calibration is required.
Section 7 describes SERVICE methodology and provides system, sub-assembly, and
component part numbers to aid the operator in making any factory authorized field repairs.
Section 8 contains the INDEX for this manual.
Section 9 contains product change notices, errata, and data relative to customer specified
modifications. Read Section 9 before operating the equipment. This is especially true when
modifications (MODs) have been installed, since these can change system operation.
If questions arise while reading this manual, the user is encouraged to call the Pacific Power
Source customer service department. Pacific maintains a toll-free number: 1-800-854-2433 or
use +1 (949) 251-1800.
7
Page 8
SECTION 1 GENERAL
1.2 SAFETY NOTICES
The ACX is capable of transferring very large amounts of electrical energy very quickly. This
basic quality is fundamental to any high-performance power source. The warnings and cautions
listed below should be observed at all times.
WARNINGS are conditions which are hazardous to user personnel. All warnings throughout
this manual will be formatted as shown below. A condition which is hazardous to both personnel
and equipment will be issued as a warning.
CAUTION statements indicate a dangerous situation which may damage the equipment but is
not a threat to life or limb. Cautions will assume the format shown on page 3. All cautions
should be rigorously observed.
CONSIGNES de SECURITÉ
La ACX est en mesure de transférer des forts niveaux d’énergie électrique et cela de manière
très rapide. Cette caractéristique est une qualité fondamentale pour ce type d’équipement haute
performance. Les règles de sécurité, avertissements et précautions décris ci-dessous doivent
être observés à tout moment.
Attention! (Avertissements): conditions dangereuses pour le personnel utilisateur. Tout les
avertissements dans ce manuel seront formattés et indiqués comme ci-dessous. Toute
condition qui peut être dangereuse à la fois pour le personnel utilisateur et l’équipement sera
indiquée comme avertissement.
Précautions: elles indiquent une situation dangereuse pouvant endommager l’équipement,
mais qui n’est pas une menace pour la vie ou un danger pour un member. Les messages de
précautions seront formattés comme sur la page 3 tout au long ce manuel et doivent étre
observés rigoureusement.
8
Page 9
SECTION 1 GENERAL
WARNING
ATTENTION
CIRCUIT PAR L’INTERMEDIAIRE DES BIJOUX QUI
MAINTENANCE
THIS EQUIPMENT CONTAINS HIGH ENERGY, LOW IMPEDANCE CIRCUITS!!
LETHAL POTENTIALS ARE CONTAINED WITHIN THE CABINET.
CARE MUST BE EXERCISED WHEN SERVICING THIS EQUIPMENT
TO PREVENT SERIOUS OPERATOR INJURY OR EQUIPMENT DAMAGE.
VOLTAGE AT THE TERMINALS RESPONDS INSTANTLY WHEN THE OUTPUT IS ACTIVATED.
OBSERVE THE FOLLOWING WHEN SERVICE, MAINTENANCE, OR CALIBRATION ARE REQUIRED:
1. REMOVE ALL JEWELRY FROM HANDS, ARMS AND NECK WHEN SERVICING THIS
EQUIPMENT. THIS PREVENTS THE POSSIBILITY OF SHORTING THROUGH THE JEWELRY
AND CAUSING BURNS OR ELECTROCUTION OF THE OPERATOR.
2. WEAR SAFETY GLASSES WHEN SERVICING THIS EQUIPMENT TO PREVENT EYE INJURY
DUE TO FLYING PARTICLES CAUSED BY ACCIDENTAL SHORT CIRCUIT CONDITIONS.
3. DO NOT REMOVE ANY PANEL OR COVER WITHOUT FIRST REMOVING THE INPUT SERVICE
BY OPENING ALL CIRCUIT BREAKERS.
4. SERVICE OTHER THAN EXTERNAL CLEANING SHOULD BE REFERRED TO PERSONNEL
AUTHORIZED BY THE FACTORY TO SERVICE THIS EQUIPMENT.
CET EQUIPEMENT CONTIENT DES CIRCUITS ELECTRIQUES DE FORTE ENERGIE ET A FAIBLE
IMPEDANCE!! DES POTENTIELS A CARACTERE MORTEL SONT CONTENUS A L’INTERIEUR DE
L’EQUIPEMENT.
UNE ATTENTION PARTICULIERE EST IMPERATIVE DANS LE CADRE DU SERVICE DE CET
EQUIPEMENT AFIN DE PREVENIR TOUT RISQUE POUVANT ENTRAINER UN ACCIDENT DE
L’OPERATEUR OU UN DOMMAGE DE L’EQUIPEMENT.
LA TENSION AUX BORNES DE SORTIE DE L’EQUIPEMENT EST PRESENTE INSTANTANEMENT
LORSQUE LA SORTIE EST ACTIVEE.
LES REGLES DE SECURITE SUIVANTES DOIVENT ETRE SUIVIES DANS LE CADRE DU SERVICE,
DE LA MAINTENANCE OU DE LA CALIBRATION DE L’EQUIPEMENT:
1. OTER TOUS LES BIJOUX DES MAINS, BRAS ET COU PENDANT LE SERVICE DE L’EQUIPEMENT
AFIN DE PREVENIR TOUT RISQUE DE COURTPOURRAIT CONDUIRE A DES BRULURES OU ELECTROCUTION DE L’OPERATEUR
2. PORTER DES LUNETTES A VERRE DE SECURITE PENDANT LE SERVICE DE L’EQUIPEMENT
AFIN DE PREVENIR TOUT RISQUE D’ACCIDENT OCULAIRE POUVANT PROVENIR DE
PARTICULES VOLANTES CREEES DANS DES CONDITIONS DE COURT-CIRCUIT
ACCIDENTELLES.
3. NE JAMAIS OTER OU RETIRER DES PANNEAUX OU COUVERCLES DE PROTECTION SANS
AVOIR AU PREALABLE COUPER LE CIRCUIT D’ALIMENTATION DE L’EQUIPEMENT.
4. TOUT AUTRE SERVICE QUE LE NETTOYAGE EXTERNE DE L’EQUIPEMENT NECESSITE
L’INTERVENTION DE PERSONNEL QUALIFIE ET AUTORISE PAR L’USINE POUR CETTE
9
Page 10
SECTION 1 GENERAL
CAUTION
PRECAUTION
WARNING
ATTENTION
1.2 SAFETY NOTICES (continued)
IF THIS EQUIPMENT IS NOT USED IN A MANNER SPECIFIED BY THE MANUFACTURER,
THE PROTECTION PROVIDED BY THE EQUIPMENT MAY BE IMPAIRED
SI CET EQUIPEMENT N’EST PAS UTILISE D’UNE MANIERE SPECIFIEE PAR LE FABRICANT,
LA PROTECTION FOURNIE PAR L’EQUIPEMENT PEUT ETRE ALTEREE
READ SECTIONS 1, 3, AND 4 OF THIS MANUAL
BEFORE INSTALLING OR OPERATING THIS EQUIPMENT.
LIRE LES CHAPITRES 1,3 ET 4 DE CE MANUEL
AVANT L’INSTALLATION ET L’UTILISATION DE CET EQUIPEMENT
10
Page 11
1.2 SAFETY NOTICES (continued)
SAFETY SYMBOLS
SIGNIFICATION DES SYMBOLES DE SECURITE
SECTION 1 GENERAL
1
2
3
4
5
6
Alternating current
Courant Alternatif
Earth (ground) Terminal
Borne de Terre
Protective Conductor Terminal
Borne Protectrice de Conducteur
On (Supply)
Allumé (On, sous tension)
Off (Supply)
Eteint (Off, hors tension)
Caution, risk of electric shock
Attention, risque de choc électrique
7
Caution, risk of danger
Attention, danger
11
Page 12
SECTION 1 GENERAL
1.3 GENERAL PRODUCT DESCRIPTION
The ACX Power Source is a high-performance AC power conversion instrument. It is intended
for indoor use and the chassis is designed to fit into a standard 19 inch instrument rack or to be
used on any test bench surface. The power source is suitable for use as a frequency converter
as well as for sophisticated AC test power generation.
These power sources are configured with a digital controller. Controller type is:
UPC1 for sophisticated programmable control - provides all of the manual control
capability, plus a wide variety of additional features including program storage, waveform
editing, and remote interface (Serial standard or GPIB optional).
Model ACX has dual-range output voltage capability, able to operate at either 0-150 volts or
0-300 volts. When operated in the high voltage range, the output may be used as either a
single-ended or split-phase configuration. The phase separation of L1 and L2 is fixed at 180
degrees in that case. Optional output transformers can be provided for higher or lower voltage
range.
Output power is up to 1.8kVA at any nominal input voltage from 115 to 240 Vac.
External Voltage Sense capability is provided and will display the actual voltage at the remote
sense location. The CSC (Continuous Self Calibration) feature will allow the controller to
regulate the voltage at the sense location.(CSC)
Output voltage and current metering is provided on the system display. Specifications of the
metering functions are described in the UPC Series Operation Manual.
FIGURE 1.3 ACX SERIES POWER SOURCE - FRONT VIEW
12
Page 13
103 VAC
25 A
rms
30 A
110 VAC
24 A
rms
30 A
120 VAC
22 A
rms
30 A
200 VAC
13 A
rms
20 A
208 VAC
13 A
rms
20 A
220 VAC
12 A
rms
15 A
230 VAC
12 A
rms
15 A
240 VAC
11 A
rms
15 A
SECTION 2
SPECIFICATIONS
2 SPECIFICATIONS
This section states the electrical and mechanical specifications of the ACX Power Source.
Some specifications are controller dependent and are noted as such.
2.1 ELECTRICAL SPECIFICATIONS
2.1.1 INPUT POWER REQUIREMENTS
The following input power forms are accepted by the ACX
INPUT VOLTAGE
The Model ACX accepts any single phase input voltage of 115-240 Vac, 50Hz or 60 Hz Nominal
and is tolerant of transient overvoltages typically present on the AC MAINS power distribution
lines.
INPUT CURRENT
The input current required by the ACX varies by model based on their maximum full rated load.
AC input currents shown below apply to model 118ACX for most common nominal line voltages.
Recommended input service is also stated. Lower power ACX models have proportionally lower
AC input currents. Overload conditions will result in higher input currents that still fall within the
recommended input service. However, at low AC line voltages, the AC input current is
electronically limited at 25Arms. This allows full rated power down to 115V -10% or 103VAC L-N
(Low Line Voltage).
NOTE: In low voltage operations the max input current is electronically limited to
25A
Vin INPUT CURRENT SERVICE RECOMMENDED
maximum. At least 12AWG input cable wire is recommended.
RMS
FIGURE 2.1 INPUT CURRENT VS. OUTPUT POWER FOR MODEL 118ACX
13
Page 14
SECTION 2 SPECIFICATIONS
1φ 2φ
Model
I
I
I
I
I
I
110ACX
11 A
16.5 A
22 A
5.5 A
8 A
11 A
115ACX
16 A
24 A
32 A 8 A
12 A
16 A
118ACX
20 A
30 A
40 A
10 A
15 A
20 A
2.1.2 OUTPUT POWER
OUTPUT VOLTAGE RANGE
The standard output voltage ranges of the ACX are:
• 0-150 Vac when operated in low range (FORM 1)
• 0-300 Vac when operated in high range (FORM 2)
OUTPUT CURRENT
FULL-RATED CURRENT
The full-rated output current of the ACX Power Source by model is:
out, rms
Refer to the Rating Curve charts of Figure 2.2 for maximum output current at a specific output
form, voltage, or power factor by model number.
OVERLOAD OPERATION
The ACX Power Source can deliver up to 120% of rated RMS output current at 25°C ambient
temperature with any input line voltage of 100 Vac or higher. However, total output power may
be limited by the AC input current limit at input voltage of 115V or less. Elevated ambient
temperature, low input voltage, or power factors between 0.8 and 1.0 will increase the internal
dissipation of the power source and can cause shutdown due to over-temperature conditions.
Length of time to reach over-temperature varies with the above parameters.
NOTE: All ACX Models are equipped with an over power protection feature. See section 4.10
for more details.
max, rms
out, pk
out, rms
max, rms
out, pk
14
Page 15
SECTION 2 SPECIFICATIONS
Rated continuous load current as a function of Power Factor and Output Voltage – Nominal Input Line.
from seconds to several minutes depending upon line and temperature conditions.
150V Range
300V Range
Short term overloads to 120% are permitted. Operating time before thermal shutdown or circuit breaker trip will vary
FIGURE 2.2 OUTPUT RATING CURVES BY MODEL
15
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SECTION 2 SPECIFICATIONS
2.1.3 OUTPUT POWER FACTOR
The ACX Power Source is designed to operate into any load power factor. However, the Rating
Curve charts of Figure 2.2 should be consulted for system capabilities at specific output power
factors. The amount of heat generated by the amplifier increases as the power factor
approaches 1.
2.1.4 OUTPUT FREQUENCY
The output frequency range of the ACX Power Source is determined by the controller which is
installed in the system. Refer to the appropriate controller manual for output frequency
specifications.
2.1.5 OUTPUT DISTORTION
The output distortion of the ACX Power Source is typically:
• less than 0.25% THD for output frequencies in the range of 15 to 200 Hz
• less than 0.50% THD for output frequencies in the range of 200 to 800 Hz
• less than 1.00% THD for output frequencies in the range of 800 to 1200 Hz
Distortion specification applies under full Resistive load condition.
2.1.6 OUTPUT LOAD REGULATION
Uncompensated load regulation of the ACX Power Source is typically:
• less than 1.5% for output frequencies in the range of 15 to 200 Hz
• less than 2.0% for output frequencies in the range of 200 to 800 Hz
• less than 3.5% for output frequencies in the range of 800 to 1200 Hz
2.1.7 INPUT LINE REGULATION
Input line regulation of the ACX Power Source is
less than 0.1% for a ±10% change in line voltage
(provided, input line voltage remains within the specified range).
2.1.8 OUTPUT BANDWIDTH
The output bandwidth of the ACX Power Source is:
Full Power: 15 to 200 Hz (±0.10 db [± 1%])
200 to 800 Hz (±0.25 db [± 3%])
800 to 1200 Hz (±0.36 db [± 4%])
Small Signal: 5 to 5,000 Hz (±0.5 db [±6%])
( rated at 10% of full-scale output voltage)
2.1.9 LOAD TRANSIENT RESPONSE
Output load transient response and recovery time is approximately:
80 μsec. for a 10-90% load induced step transient
16
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SECTION 2 SPECIFICATIONS
Height:
3.5" / 89 mm
2U rack mountable units
Width:
19.00" / 483 mm
Front panel with mounting brackets
16.75" / 426 mm
Main chassis
Depth:
23.62" / 600 mm
Measured from back side of front panel, excludes
terminal blocks
Weight:
40 lbs. / 18.2 kg
2.1.10 OUTPUT DC OFFSET
The DC offset present on the output is: < 20 mVDC.
2.1.11 OUTPUT PROTECTION
The output of the ACX Power Source is protected through the use of electronic current limiting.
The output will automatically recover when the output fault is removed. Thermal overload
protection is also provided. Refer to paragraph 2.3.5 for details.
The universal AC output socket that is located on the front of the ACX is limited to 10 A(RMS)
operation. It is protected by a 10A circuit breaker located at the rear of the power source. If the
current draw at the socket exceeds the 10A rating, the circuit breaker will disconnect power to
the socket. Reduce the load at the socket and press the circuit breaker button to reset.
NOTE: The digital controller also provides programmable current limit.
Refer to the UPC Series Operation Manual for details.
2.1.12 OUTPUT CONTROL CHARACTERISTICS
Output control characteristics, sync I/O signals, and metering capabilities are determined by the
controller which is installed. Refer to the UPC Series Operation Manual for details.
2.1.13 OUTPUT ISOLATION
The output of the ACX is galvanically isolated from the chassis and input power. Output Neutral
to Chassis voltage is allowed to be 150 VAC, maximum. See paragraph 3.4, Output Power
Connection, for grounding information.
2.2 MECHANICAL SPECIFICATIONS
The ACX Power Source mechanical characteristics are:
2.2.1 DIMENSIONS AND WEIGHT
Parameter Value Notes
17
Page 18
SECTION 2 SPECIFICATIONS
AIR INTAKE
23.82
0.86
1.22
TB5: REMOTE
CIRCUIT BREAKER
OUTPUT SOCKET
EXHAUST AIR
OUTPUT
AUX I/O
GPIB/RS232
INPUT
COVER
3.00
3.50
INPUT AC
CIRCUIT BREAKER
UPC CONTROLLER
UNIVERSAL AC
OUTPUT
16.75
18.34
19.00
2.2.1 DIMENSIONS DRAWINGS
–
FRONT VIEW
CONTACTOR CONTROL
FOR UNIVERSAL AC
FIGURE 2.3 OUTLINE DRAWING
RIGHT VIEW
TERMINAL
REAR VIEW
18
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SECTION 2 SPECIFICATIONS
2.2.2 INPUT POWER CONNECTION
Input power is brought into the ACX at the Input Power terminal block on the rear panel.
2.2.3 OUTPUT POWER CONNECTION
Output power is taken from the ACX Power Source via rear panel mounted terminal blocks.
Remote Sense terminals are also provided at this terminal block.
Terminal block TB5 on the rear of the ACX may be used to remotely enable/disable the output of
the power source. An electrical connection between terminals TB5-1 and TB5-3 enables the
output of the ACX allowing normal operation from the front panel or remote interface. An open
connection between TB5-1 and TB5-3, disables the output of the ACX. The ACX is supplied
with a jumper installed in TB5 such that the output is enabled. That jumper may be replaced by
a switch or relay which can operate as a safety interlock or remote disconnect.
2.2.4 CHASSIS SLIDE MOUNTS
The ACX Power Source is designed to accept slide rails for mounting in a 19” Instrument
Cabinet. These rack slides can be provided as a cost option. Contact your local sales
representative or the Pacific Power Source Sales Office.
2.3 ENVIRONMENTAL SPECIFICATIONS
2.3.1 TEMPERATURE RANGE
The ACX Power Source is rated for full operation in ambient temperatures of:
0 - 40°C, relative humidity in the range of 0 - 95%, non-condensing.
Operation from 40°C to 55°C is permitted with output power decreasing linearly with increasing
ambient temperature. Available power at 55°C is 600W.
2.3.2 COOLING
The ACX Power Source utilizes thermally regulated forced-air cooling to maintain proper
temperatures throughout. The maximum airflow is 240 CFM.
2.3.3 ALTITUDE
The ACX Power Source is rated for full operation at altitudes of:
0 – 10,000 feet/3,000m.
2.3.4 POLLUTION DEGREE
The ACX Power Source is rated for full operation in environments of mild pollution severity and
humidity referred to as Pollution Degree 2. These conditions are typically present in office,
laboratory and ATE environments. Normally only nonconductive pollution occurs. Temporary
conductivity caused by condensation is to be expected.
2.3.5 THERMAL PROTECTION
Temperature sensors are installed in the power assemblies. If safe operating temperature is
exceeded, the output is opened and the Shutdown LED on the front panel, is lighted. A
shutdown fault must be reset to restore normal operation. See paragraph 4.5 for details.
19
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WARNING
ATTENTION
THE ACX WEIGHS 40 lbs [18.2 kg]
USE EXTREME CARE WHEN MOVING THE UNIT
LA ACX PESE 40 lbs [18.2Kg]
DE LA ACX EST DE 8MM.
SECTION 3
INSTALLATION
3 INSTALLATION
This section describes the installation of the ACX AC Power Source.
3.1 CHASSIS PLACEMENT
The ACX Power Source is designed to operate as a bench-top unit, or to fit into a standard 19-inch
rack. Provisions for mounting slide rails are included on the chassis.
IN ORDER TO REDUCE CHANCE OF PHYSICAL INJURY.
WHEN MOUNTING SLIDE RAILS TO THE ACX CHASSIS, MAXIMUM SCREW LENGTH IS 8 mm.
VEILLEZ A PRENDRE TOUTES LES PRECAUTIONS NECESSAIRES DURANT LE TRANSPORT DE
L’EQUIPEMENT AFIN DE MINIMISER TOUT RISQUE D’ACCIDENT PHYSIQUE.
LA LONGUEUR MAXIMUM DES VIS DESTINEES A FIXER LES GLISSIERES SUR LE CHASSIS
- - - - - - - - P A C K I N G N O T I C E - - - - - -
It is the customer's responsibility to insure that units are adequately
packaged when they are moved to a different location. The ACX should
always be packaged in the original shipping container when moved or
returned to the factory for service.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
20
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SECTION 3 INSTALLATION
3.1 CHASSIS PLACEMENT (continued)
Once the unit has been removed from its shipping container, select an appropriate location for the
unit. Key points to consider when locating the chassis are:
1. PROXIMITY TO THE LOAD - The power source should be located as close to the load as
possible. This helps to reduce distribution losses. These losses increase as the output
frequency increases.
2. VENTILATION - The chassis requires good ventilation to adequately cool the internal
components. Airflow should allow 240 CFM. The air intake is located on both sides near
the front. A minimum clearance of two inches on each side and 12 inches to the rear is
required for proper operation.
When the unit is placed in a 19 inch rack, it must be supported by either chassis slides or full depth
angle brackets. The front panel alone will not support the weight of the chassis. Chassis slides
are available from Pacific Power Source as a cost option. Call factory service for details.
After the location for the chassis is selected, verify that the input voltage of the power source is
correct. Input voltage is stated on the system ID label.
After the input voltage form has been verified as correct, slide the chassis into the rack or set it into
its final position. Make input and output connections as stated in paragraphs 3.3 and 3.4,
respectively.
If either the Remote Interface (GPIB or RS-232) or External Sense feature is to be used, refer to
paragraphs 3.5 and 3.7 for connection
Before activating the ACX output, check that the output voltage is correct to prevent possible
damage to any attached equipment.
3.2 OUTPUT RANGE CONFIGURATION
The ACX is a dual-range power source. The output voltage range is selected by the FORM
setting selected in the UPC controller. See the UPC Ser ies Operation Manu al for setup. The
standard output configurations are:
FORM 1: 0 – 150 Vac
FORM 2: 0 – 300 Vac
AMPS TO VOLTS RATIO:
For accurate current meter display, the Amps to Volts Ratio Setting of the UPC is always set to 5
for the Model ACX. Refer to the UPC Series Operation Manual for details.
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SECTION 3 INSTALLATION
WARNING
ATTENTION
A CETTE REGLE PEUT ENTRAINER UN RISQUE DE CHOC.
3.3 INPUT POWER CONNECTION
The ACX Power Source has been designed to accept most standard single-phase input voltage
forms. This is accomplished by incorporating an active wide-range power factor correction circuit.
Any single-phase input voltage from 115 to 240 Vac ±10% can be applied. No range selection is
required.
LETHAL VOLTAGE IS PRESENT AT INPUT TERMINALS OF THIS DEVICE.
ALWAYS CONNECT "PE or GND" TERMINAL TO EARTH POTENTIAL.
FAILURE TO DO SO WILL CREATE A SHOCK HAZARD.
TENSION A CARACTERE MORTEL PRESENTE SUR LES BORNES DE SORTIE DE CET EQUIPEMENT.
LA MISE A LA TERRE DES BORNES ‘PE ou GND’ EST IMPERATIVE. UN MANQUEMEMT
CAUTION
PRECAUTION
CONNECTION OF THIS UNIT TO IMPROPER INPUT VOLTAGE
WILL CAUSE CATASTROPHIC DAMAGE TO THE POWER SOURCE.
READ THE INPUT VOLTAGE LABEL AND CONNECT TO THAT INPUT VOLTAGE ONLY.
IF THERE ARE ANY QUESTIONS, CONTACT THE FACTORY
LE RACCORDEMENT A UNE TENSION D’ENTRÉE INCORRECTE PEUT CONDUIRE A DES DOMMAGES
CATASTROPHIQUES DE L’EQUIPEMENT. LIRE L’ETIQUETTE INDIQUANT LA TENSION D’ENTRÉE ET
RACCORDER L’EQUIPEMENT A CETTE TENSION D’ENTRÉE UNIQUEMENT.
POUR TOUTES QUESTIONS, CONTACTER L’USINE
22
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3.3 INPUT POWER CONNECTION (continued)
Wire Color( USA)
Wire Color( Europe)
LINE ( HI )
Black
Brown
NEUTRAL ( LO )
White
Blue
GROUND ( PE * )
Green
Green-Yellow
TO
USER
GROUND
INPUT
PE/GND
HI
LO
The ACX Power Source is provided with a terminal block for input power connection. This allows
hard-wired connection for system applications or attachment of an appropriate input power cord.
Refer to Paragraph 2.1.1 for minimum input service requirements for various input voltages and
size the input cable wires accordingly.
Refer to the table below for the proper wire color of each connection.
* Protective Earth
NOTE: It is the user's responsibility to meet all local and national electrical codes when installing
this equipment. This equipment is classified as a permanently connected device. As
such, proper installation requires the use of a circuit breaker in the building wiring
installation which is sized appropriately to protect the facility wiring. A switch or circuit
breaker shall be in close proximity to the equipment and marked as the disconnecting
device for the equipment.
CHASSIS
CONNECTION
ATTACHED
TO STUD AS
SHOWN
SECTION 3 INSTALLATION
LINE
FIGURE 3.3 INPUT AND OUTPUT CONNECTIONS
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SECTION 3 INSTALLATION
WARNING
ATTENTION
LETHAL VOLTAGES MAY BE PRESENT AT THE OUTPUT TERMINALS OF THIS DEVICE!
DES TENSIONS A CARACTERE MORTEL PEUVENT ETRE PRESENTES SUR LES BORNES DE SORTIE
3.4 OUTPUT POWER CONNECTION
The ACX provides output connections at both the front and rear of the chassis. Front panel load
connection is through a universal outlet socket. Available current at this socket is 10 amps max., protected
by a circuit breaker located at the rear of the unit. Rear panel load connection is available through a
terminal block which is rated for the full output current of the ACX. Figure 3.3 illustrates connection of a
single-phase load to the ACX rear-panel terminal. Refer to Paragraph 2.1.2 for minimum output service
requirements for various output voltages and size the output wires accordingly.
REFER OUTPUT CONNECTION TO A QUALIFIED ELECTRICIAN.
DE CET EQUIPEMENT! VEUILLEZ VOUS REFERER A UN ELECTRICIEN QUALIFIE POUR LA
CONNECTION DES BORNES DE SORTIE
NOTE: No metal parts should be touching the output terminals as dangerous
voltage may be present. It is the user's responsibility to meet all local and
national electrical codes when installing this equipment.
For safe operation, the PE ground terminal should always be connected to the chassis of the load.
Output power should also be referenced to the chassis, unless otherwise demanded. The output
is isolated but insulation specifications require that no more than 150 Vac be present between the
output neutral (LINE2 or N) and chassis. For single-phase applications, a jumper should be
attached between LINE2 and PE/GND. For applications using the high range as a split-phase
configuration, the jumper should be attached between N and PE/GND.
Refer to Paragraph 3.7 for connection of the External Sense connection, when used.
The ACX Power Source output can be configured for single and split phase voltage forms. Figure
3.4 is a simplified block diagram of the possible output architectures.
The FORM1 (low range, 0-150 Vac) mode of operation is a one vector output form, single-phase
only. The power amplifiers are connected in parallel to form one output vector. The load can be
attached from LINE1 to LINE2 or LINE1 to N. In this form, LINE2 and Neutral are connected. This
output form is capable of 0-150 VAC
The FORM2 (high range, 0-300 Vac) mode of operation is a two vector output form where the
vectors are separated by 180° and equal in amplitude. This output form uses power amplifiers in
pairs, one for each vector.
For single phase 0-300 VAC
For loads that require three connections (L
LINE 1 and LINE 2 are equal in voltage and 180 degrees apart, referenced to Neutral. Loads can
be connected from either LINE to Neutral or from LINE1 to LINE2.
connect the load from LINE1 to LINE2.
l-l,
.
l-n
-N-L2), commonly referred to as "Split-Phase" power,
1
24
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3.4 OUTPUT POWER CONNECTION (continued)
FORM1 OUTPUT
FORM2 OUTPUT
SPLIT PHASE
Interface Type
Notes
GPIB
General Purpose Interface Bus. Standard GPIB Connector located on
the rear panel.
RS232
RS-232 Interface. D-Sub 9 Pin connector located on rear panel.
(Depicted in Figure 3.6)
Pin out DB9 Connector:
All other pins are N/C
Older units may have been equipped with a DB25 RS232 Connector
converter.
SECTION 3 INSTALLATION
SINGLE PHASE, LOW RANGE
FIGURE 3.4 ACX-SERIES SYSTEM ARCHITECTURE
SINGLE PHASE, HIGH RANGE
OR
3.5 REMOTE INTERFACE
The ACX with the UPC Series programmable controller is supplied with one of two remote
interfaces.
Pin 1: Receive Data
Pin 2: Transmit Data
Pin 5: Signal Ground
instead of a DB9. In that case, use Cable PPS #778018 (Belkin
F2L088-06 cable) to adapt to a DB9 PC Serial port or USB to RS232
Connection and communication information relative to these interfaces can also be found in the
UPC Series Operation Manual.
25
Page 26
SECTION 3 INSTALLATION
3.6 AUX I/O INSTALLATION
On the rear panel J5, the AUX I/O (Auxiliary Input/Output) connector, contains synchronizing
outputs (digital), external oscillator inputs (analog), and amplitude modulation inputs (AM, analog).
These are extremely useful in certain test applications. The use of any of these signals is optional
and connection to these points is required only when these features are used.
All signals contained within the AUX I/O connector are low-level (less than ±15 VDC) and are
referenced to chassis (earth) ground reference. Refer to the UPC controller operation manual for
complete definition of the signals present on the AUX I/O connector.
The AUX I/O connector is a DB-25S connector. A DB-25P connector is required for connection to
AUX I/O connector.
FIGURE 3.5 AUX I/O DB25S Pin Out Diagram
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SECTION 3 INSTALLATION
WARNING
ATTENTION
LETHAL VOLTAGES ARE PRESENT AT THE OUTPUT TERMINALS OF THIS DEVICE!
DES TENSIONS A CARACTERE MORTEL SONT PRESENTES SUR LES BORNES DE SORTIE
QUALIFIE POUR LA CONNECTION DES BORNES DE SORTIE
External
Sense
3.7 EXTERNAL SENSE CONNECTION
The ACX Power Source includes connections for external sense of the output voltage. This
allows measurement of the output voltage at an external sense point. This feature can be
completely disabled, so the wiring detailed in this paragraph is optional.
WHEN EXTERNAL SENSE IS CONNECTED, THE SAME VOLTAGE APPEARS ON THE SENSE TERMINALS.
REFER OUTPUT CONNECTION TO A QUALIFIED ELECTRICIAN.
DE CET EQUIPEMENT! SI LES SENSE EXTERNES SONT RACCORDEES, LES MEMES TENSIONS
SONT PRESENTES SUR LES BORNES DE SENSE. VEUILLEZ VOUS REFERER A UN ELECTRICIEN
Figure 3.6 shows external sense wiring for the ACX. There is very little current flowing through the
External Sense Feedback lines. Standard 22 AWG, 600 Volt control wire is recommended for this
application. Twisting the External Sense wiring is recommended and, in some cases, can
improve performance. In noisy environments, shielding may become necessary to minimize
interference. If shielded cable is used, be sure to ground the shield at one end only to prevent the
possibility of creating a ground loop.
FIGURE 3.6 EXTERNAL SENSE WIRING
27
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SECTION 4 OPERATION
SECTION 4
OPERATION
4 OPERATION
This section describes the operation of a ACX AC Power Source. The procedure described in the
following paragraphs is a general procedure and does not detail operation of any specific control
functions. Refer to the UPC Series Operation Manual for detailed information regarding the
features of the controller.
4.1 FRONT PANEL CONTROLS
The location of the front panel controls and indicators of the ACX Power Source is shown below.
A brief description of each is also given. Figure 4.1 is a front view of the ACX. Refer to the UPC
Series Operation Manual for information relative to the installed UPC-1 controller.
1. INPUT POWER SWITCH (Circuit Breaker @ 30A)
Circuit Breaker used as the main input ON/OFF control and protects the power source
from drawing excessive input current from the input AC line.
2. OUTPUT POWER SWITCH and INDICATORS
Switch used to control the output relay of the ACX-Series Power Source. An indicator
shows the status of the output. The power source will shut down for over-temperature or
other internal fault. Shutdown is reset when the Output Power Switch is set to OFF and
the fault has cleared. Refer to Paragraph 4.5 for details.
FIGURE 4.1 FRONT PANEL CONTROLS
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SECTION 4 OPERATION
CAUTION
PRECAUTION
DO NOT CONNECT ANY LOADS TO THE OUTPUT OF THE POWER SOURCE UNTIL THE OUTPUT
NE RACCORDER AUCUNE CHARGE SUR LA SORTIE DE L’EQUIPEMENT SANS AVOIR AU PREALABLE
CONNECTEES A L’EQUIPEMENT
WARNING
ATTENTION
LETHAL VOLTAGES ARE PRESENT AT THE INPUT AND OUTPUT TERMINALS OF THIS EQUIPMENT!
DES TENSIONS A CARACTERE MORTEL SONT PRESENTES SUR LES BORNES D’ENTRÉE ET DE
SORTIE DE CET EQUIPEMENT!
4.2 INITIAL POWER-UP
This paragraph describes the procedure used to power-on the ACX Power Source for the first
time. The steps below are the recommended order of operation.
1. For new installations, check input connections (including proper input voltage). Do not connect
the load at this time. Also verify that the OUTPUT POWER switch is in the OFF position.
2. Switch the INPUT POWER switch to the ON position. The controller display will light up and begin
to present output data.
3. Set the controller for the desired output voltage, frequency, etc.
(Refer to the UPC Operation Manual for adjustment of output parameters.)
4. Set the OUTPUT POWER switch of the ACX to the ON/AUTO position and press the UPC
OUTPUT ENABLE switch to set it to the ON position.
VOLTAGE AND FREQUENCY HAVE BEEN VERIFIED AS CORRECT.
APPLICATION OF IMPROPER VOLTAGE OR FREQUENCY CAN DAMAGE LOADS.
VERIFIE ET VALIDE LES PARAMETRES DE SORTIE TENSION ET FREQUENCE
L’APPLICATION DE TENSION ET FREQUENCE INCORRECTES PEUT ENDOMMAGER LES CHARGES
5. Verify proper voltage, frequency and waveform at the output terminal block. If the output is not
correct, set the output to proper values. Refer to the controller manual for details.
6. When the desired output has been verified, turn the system OFF by first setting the OUTPUT
POWER SWITCH to the OFF position and then opening the INPUT POWER SWITCH. Connect
the load.
7. Re-start the unit beginning at step 2, above. Verify that the system delivers power to the load.
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SECTION 4 OPERATION
CAUTION
PRECAUTION
DO NOT CONNECT ANY LOADS TO THE OUTPUT OF THE POWER SOURCE UNTIL THE OUTPUT
NE RACCORDER AUCUNE CHARGE SUR LA SORTIE DE L’EQUIPEMENT SANS AVOIR AU PREALABLE
CONNECTEES A L’EQUIPEMENT
WARNING
ATTENTION
LETHAL VOLTAGES ARE PRESENT AT THE INPUT AND OUTPUT TERMINALS OF THIS EQUIPMENT!
DES TENSIONS A CARACTERE MORTEL SONT PRESENTES SUR LES BORNES D’ENTRÉE ET DE
SORTIE DE CET EQUIPEMENT!
4.3 ROUTINE POWER-UP
After it has been verified that the installation is correct, follow the steps below for routine operation.
1. Set the OUTPUT POWER switch to the OFF position.
2. Switch the INPUT POWER switch to the ON position. The controller will light up and begin to
display output data.
VOLTAGE AND FREQUENCY HAVE BEEN VERIFIED AS CORRECT.
APPLICATION OF IMPROPER VOLTAGE OR FREQUENCY CAN DAMAGE LOADS.
VERIFIE ET VALIDE LES PARAMETRES DE SORTIE TENSION ET FREQUENCE
L’APPLICATION DE TENSION ET FREQUENCE INCORRECTES PEUT ENDOMMAGER LES CHARGES
3. Set the OUTPUT POWER switch to the ON/AUTO position and press the UPC OUTPUT
ENABLE switch to set it to the ON position.
4.4 SYSTEM TURN-OFF
The ACX Power Source is turned off by:
1. Set the OUTPUT POWER Switch to the OFF position.
2. Open the INPUT POWER circuit breaker.
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SECTION 4 OPERATION
4.5 SYSTEM SHUTDOWN
This paragraph describes the conditions which will cause an automatic system shutdown and the
procedure used to reset the ACX-Series Power Source.
4.5.1 SHUTDOWN CONDITIONS
The Output Contactor of the ACX-Series Power Source will be opened automatically when:
1. Excessive temperature is detected. Either the input power circuit or one of the power
amplifiers has become too hot. Over-temperature is usually caused by either an overload
on the system output or restricted air-flow (air inlets may be blocked, dirty fan filters, or a
clogged or non-functioning fan).
2. The Output FORM (UPC controller) has been changed. While the Output Contactor is
engaged, any change of FORM, low range to high range or high range to low range, will
force the unit to open the output contactor so that the range can be changed safely.
When the Output Contactor has been opened due to one of the above faults, the red
SHUTDOWN LED on the front panel of the power source will be lighted. The output contactor will
remain open while the SHUTDOWN LED is lighted. This LED will remain lighted until the unit is
reset.
If the Output Power Switch is in the ON/AUTO position when the unit is turned on, the
SHUTDOWN LED will light. This is normal operation. The LED is turned off simply by placing the
Output Power Switch into the OFF position.
4.5.2 RESETTING SHUTDOWN FAULTS
A shutdown fault is reset as follows:
1. Set the OUTPUT POWER Switch to the OFF position.
If the unit is controlled through the remote (GPIB or RS-232) port, command the output
OFF (:OUTP OFF).
2. Wait for the SHUTDOWN LED to extinguish. This LED will remain lighted until the
condition which caused the shutdown to occur has been corrected. In the case of
shutdown due to over-temperature this may take some time while the unit cools. The
output contactor cannot be engaged until the shutdown fault has been cleared.
3. After the SHUTDOWN LED has been extinguished, the unit will function normally.
NOTE: The SHUTDOWN LED is latched ON when a fault occurs. The OUTPUT
POWER Switch or the Output Enable of the UPC MUST be placed in the OFF
position before the SHUTDOWN LED will extinguish, even if the original fault no
longer exists.
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SECTION 4 OPERATION
4.6 OUTPUT VOLTAGE FORMS
The ACX is a dual-range power source. The output voltage range is selected by the FORM
setting selected in the UPC controller. See the UPC Ser ies Operation Ma nual for setup. The
standard output configurations are:
FORM 1: 0 – 150 Vac
FORM 2: 0 – 300 Vac
A recommended strategy for selecting the optimum output voltage form is to select the minimum
voltage range necessary to drive the load. That will provide the maximum available current and
allows the power source to operate more efficiently. This results in less heat being created within
the unit.
4.7 AUDIBLE ALERT
An audible alert within the ACX will sound to indicate any of several conditions:
1) When power is applied, it will “beep” 2X indicating normal start-up.
2) If the AutoStart option has been ordered, the unit will “beep” several times indicating
normal start-up and activation of the unit output. Power may be present at the output
terminals immediately, depending on the active program settings. See the Modification
insert if applicable to your unit for more information.
3) During operation a steady tone may be produced, indicating one of the following
operational limits has been exceeded:
• Input AC voltage is too high or too low; not within the 90-264 Vac specification.
• Input current has exceeded 25 Arms. This could occur at low input voltage and
high power output combination.
• Output power demand exceeds the specified 120% overload condition.
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4.8 CONSTANT CURRENT MODE
The default mode of operation for the ACX is constant current mode. In this mode, the output
voltage will be reduced once the set current limit is reached to maintain the current level drawn by
the load. Once the load current demand drops below the set current limit level, the programmed
output voltage is restored automatically. Thus, the AC Source continues to operate even if the
UUT demands more current than the set current limit value. This current limit function is an
average responding RMS current limit with a 50 msec response time.
The current limit value can be set in the PROGRAM screen by entering the EDIT mode and using
the ENTER key to scroll to the Ilim field value located at the bottom of this screen.
SECTION 4 OPERATION
NOTE: If the Ilim = value is set higher than the maximum available current for the range, the
amplifier hardware limit will come in first so the Constant Current Mode does not engage.
CC Mode Specifications
Range: 0.1 – 50 Amps
Resolution: 0.05% of full scale
Accuracy:
.
PROGRAM SCREEN Ilim SETTING
±3% of full scale over the full range of ambient conditions
33
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SECTION 4 OPERATION
4.9 CONSTANT VOLTAGE MODE (CURRENT PROTECTION MODE)
When the CURRENT PROTECTION feature is enabled, the ACX will operate in a constant
voltage mode. In this mode, if the load current exceeds the set current protection limit (IprA) for a
specified period of time, the power source will generate a fault condition and open the output relay
of the power source. This disconnects the load from the AC Source. An error message will be
displayed on the screen when this event occurs.
The programmable delay may be used to allow ride-through of temporary inrush current events
and prevent nuisance tripping in this mode of operation. The protection delay (IprT=) can be set by
the user in 100 msecs steps from 100msec (1) to 109.22 mins (65535)
When the System Output is disabled due to Current Protect, the UPC will display
“ERROR – CURRENT PROTECTION TRIGGERED”
Either the CLEAR or DISPLAY button must be depressed to clear the fault before the OUTPUT
ENABLE switch will operate.
To avoid conflicts with the constant current mode of operation, the protection mode has to be
enabled by the user. It can be toggled ON or OFF from the CURRENT PROTECT MENU which is
reached by pressing function key f
Press 3 for GENERAL SETUP
Press 7 for MORE OPTIONS…
Press 3 for CURRENT PROTECT
(Sequence: fn 3 7 3)
followed by:
n
CURRENT PROTECTION MODE SETUP SCREEN
To set the protection level and time delay for the constant voltage mode, the Ilim field in the
PROGRAM screens can be toggled to the IprA and IprT fields by using the +/- toggle key. Once
selected, use the ENTER key to proceed to the value field and use keypad to set Current Level
and Delay in 100msec segments. Press EXECUTE to set the new values for the selected
PROGRAM number.
PROGRAM SCREEN IprA CURRENT LEVEL SETTING
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SECTION 4 OPERATION
CV Mode
(CURRENT PROTECTION)
PROGRAM SCREEN IprT TRIP DELAY SETTING
Specifications
Level
Range: 0.1 – 50 Amps
Resolution: 0.05% of full scale
Accuracy: ± 0.2% of full scale + Calibration Reference
Delay
Range: 1 – 65535 (0.1 sec – 109.22 mins)
Resolution: 100 msecs (1 count = 100 msecs)
Accuracy ± 100 msecs
Notes:
1. During system operation, the UPC must be metering system output for Current Protect to
operate. Current Protect (as with voltage and current metering) is disabled during program
edit or UPC Setup mode for firmware revisions 5.2.2 or lower.
2. When the System Output is disabled due to Current Protect, the UPC will display, “ERROR
– CURRENT PROTECTION TRIGGERED”. Either the CLEAR or DISPLAY button must be
depressed to clear the fault before the UPC32 OUTPUT ENABLE switch will operate.
3. It is recommended the Current Limit (Ilim) be set to a value greater than Current Protect
(IprA). Setting current limit at or below current protect value will prevent Current Protect
from disabling the power source output.
4. During “Transient Operation” UPC Metering timing is modified. Subsequently, Current
Protection operation may be affected.
35
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SECTION 4 OPERATION
110ACX
1300 Watt
115ACX
1950 Watt
118ACX
2340 Watt
4.10 POWER PROTECTION MODE
All ACX models with firmware revision 2.53 or higher are furnished with an over power
protection mode. If for whatever reason the ACX source is delivering considerably more true
power than its maximum rating, the unit will shut down to protect itself from damage. Trip levels
are typically set at 130% of rating and a two second delay is imposed to avoid nuisance tripping
during temporary overloads or power inrush conditions.
If the total output power drawn by the load exceeds the power trip level in Watts, the output is
turned off and the following error message will be displayed:
The power protection trip level differs for each ACX model as shown in the table below.
MODEL OPP TRIP LEVEL
Upon a triggering an over power fault, the ACX can be cleared by pressing the CLEAR button
and the output can be re-enabled using the OUTPUT ENABLE button.
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SECTION 5
MAINTENANCE
5 MAINTENANCE
This section describes the maintenance of the ACX Power Source.
5.1 MAINTENANCE INTERVAL
Maintenance is required once every six months and consists of performing regular calibration.
Refer to Section 6 for details. For critical applications or if system operation is suspect or
operating conditions are extreme the calibration interval may be shortened.
It is recommended to check/clean the air intake and exhaust areas and the fans when calibrating,
or more often as required by operating conditions.
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SECTION 6
CALIBRATION
6 CALIBRATION
This section describes the calibration requirements of the ACX AC Power Source.
6.1 CALIBRATION INTERVAL
The ACX Power Source requires calibration once every six months or after service has been
performed to the system.
6.2 TEST EQUIPMENT REQUIREMENTS
The test equipment listed below is required for calibration of the ACX-Series Power Source.
1. Digital Voltmeter: 4½ Digit True-RMS responding
5000 Hz bandwidth, minimum
2. Frequency counter: 5 digit counter, minimum
3. Digital Ammeter: 3½ Digit True-RMS responding
5000 Hz bandwidth, minimum
(Alternate: Current transformer used in conjunction with the DVM.)
4. Oscilloscope: (Optional but recommended)
5. Load (Resistive): 15 Amps at 150 VAC, 7.5 amps at 300 VAC
6.3 CALIBRATION PROCEDURE
This calibration procedure verifies that system gains for output and metering are set properly and
that the system performance, relative to output power capability is intact. Gains in various signal
paths within the controller are adjusted by the procedure of Paragraph 6.3.1. Output power
capability of the power source is tested by the procedure of Paragraph 6.3.2.
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SECTION 6 CALIBRATION
WARNING
ATTENTION
CARE MUST BE EXERCISED WHEN SERVICING THIS EQUIPMENT IN ORDER TO PREVENT SERIOUS OPERATOR
WEAR SAFETY GLASSES WHEN SERVICING THIS EQUIPMENT TO PREVENT EYE INJURY DUE TO FLYING
DO NOT REMOVE ANY PANEL OR COVER WITHOUT FIRST REMOVING THE INPUT SERVICE BY OPENING
SERVICE OTHER THAN EXTERNAL CLEANING SHOULD BE REFERRED TO PERSONNEL AUTHORIZED BY
DES CIRCUITS ELECTRIQUES DE FORTE ENERGIE ET A FAIBLE IMPEDANCE!! DES
UNE ATTENTION PARTICULIERE EST IMPERATIVE DANS LE CADRE DU SERVICE DE CET EQUIPEMENT AFIN DE
TOUT AUTRE SERVICE QUE LE NETTOYAGE EXTERNE DE L’EQUIPEMENT NECESSITE L’INTERVENTION
DE PERSONNEL QUALIFIE ET AUTORISE PAR L’USINE POUR CETTE MAINTENANCE
6.3 CALIBRATION PROCEDURE ( cont. )
THIS EQUIPMENT CONTAINS HIGH ENERGY, LOW IMPEDANCE CIRCUITS!! LETHAL POTENTIALS ARE
CONTAINED WITHIN THE CABINET.
INJURY OR EQUIPMENT DAMAGE.
VOLTAGE AT THE TERMINALS RESPONDS INSTANTLY WHEN THE OUTPUT IS ACTIVATED.
OBSERVE THE FOLLOWING WHEN SERVICE, MAINTENANCE, OR CALIBRATION ARE REQUIRED:
1. REMOVE ALL JEWELRY FROM HANDS, ARMS AND NECK WHEN SERVICING THIS EQUIPMENT. THIS
PREVENTS THE POSSIBILITY OF SHORTING THROUGH THE JEWELRY AND CAUSING BURNS OR
ELECTROCUTION OF THE OPERATOR.
2.
PARTICLES CAUSED BY ACCIDENTAL SHORT CIRCUIT CONDITIONS.
3.
ALL CIRCUIT BREAKERS.
4.
THE FACTORY TO SERVICE THIS EQUIPMENT.
CET EQUIPEMENT CONTIENT
POTENTIELS A CARACTERE MORTEL SONT CONTENUS A L’INTERIEUR DE L’EQUIPEMENT.
PREVENIR TOUT RISQUE POUVANT ENTRAINER UN ACCIDENT DE L’OPERATEUR OU UN DOMMAGE DE
L’EQUIPEMENT.
LA TENSION AUX BORNES DE SORTIE DE L’EQUIPEMENT EST PRESENTE INSTANTANEMENT LORSQUE LA
SORTIE EST ACTIVEE.
LES REGLES DE SECURITE SUIVANTES DOIVENT ETRE SUIVIES DANS LE CADRE DU SERVICE, DE LA
MAINTENANCE OU DE LA CALIBRATION DE L’EQUIPEMENT:
1. OTER TOUS LES BIJOUX DES MAINS, BRAS ET COU PENDANT LE SERVICE DE L’EQUIPEMENT AFIN DE
PREVENIR TOUT RISQUE DE COURT-CIRCUIT PAR L’INTERMEDIAIRE DES BIJOUX QUI POURRAIT
CONDUIRE A DES BRULURES OU ELECTROCUTION DE L’OPERATEUR
2. PORTER DES LUNETTES A VERRE DE SECURITE PENDANT LE SERVICE DE L’EQUIPEMENT AFIN DE
PREVENIR TOUT RISQUE D’ACCIDENT OCULAIRE POUVANT PROVENIR DE PARTICULES VOLANTES
CREEES DANS DES CONDITIONS DE COURT-CIRCUIT ACCIDENTELLES.
3. NE JAMAIS OTER OU RETIRER DES PANNEAUX OU COUVERCLES DE PROTECTION SANS AVOIR AU
PREALABLE COUPER LE CIRCUIT D’ALIMENTATION DE L’EQUIPEMENT.
4.
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SECTION 6 CALIBRATION
6.3.1 CONTROLLER CALIBRATION
The first step in system calibration is to calibrate the UPC controller as stated in the controller
manual. Refer to Section 8 of the UPC Series Operation Manual, P/N 141020.
6.3.2 POWER SOURCE LOAD TEST
These tests are used to verify that the power source is able to deliver full rated output power.
Additionally, the output metering function of the controller is also checked.
1. Set the Power Source for FORM2 Output, CSC Enabled.
2. Attach a 6A, 2000W load to the rear panel Output Terminal.
3. Set the output for 300 V and close the Output Contactor.
4. Verify that the output voltage remains constant (within load regulation limits) and that the
Output metering reads correct values.
5. Open the Output Contactor.
6. Configure for FORM1 Output. Repeat above procedure with a 12A, 2000W load and 150 V.
7. Verify that the output voltage and Power Source meters read properly.
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MODEL NAME
PART No.
MODEL 110ACX
1.0 kVA AC Power Source
MODEL 115ACX
1.5 kVA AC Power Source
MODEL 118ACX
1.8 kVA AC Power Source
UPC1 Programmable 1φ Controller:
141170
LCD Display Assembly:
139071
Power Amplifier Assembly:
200431
Input PFC Assembly:
200418
Keyboard Assembly:
200437
Input Filter Assembly:
200434
COMPONENT
FACTORY PART No.
Input Circuit Breaker:
716098
Front Panel Handle:
200526
Output Terminal Block:
705113
Input Terminal Block:
705113
Fan:
703200
Fuse:
712088
SECTION 7
SERVICE
7 SERVICE
This section describes service of the ACX AC Power Source.
7.1 SERVICE PROCEDURE
The ACX Power Source contains no user serviceable parts. Service is properly accomplished
by returning the unit to the factory or authorized service center. Under some circumstances, the
factory may authorize the user to perform limited sub-assembly or component changes as
deemed allowable by the factory service representative. For this purpose, many sub-assembly
and component level Pacific Power Source part numbers have been included here. Part
numbers for various components are listed separately for each Model.
When questions regarding operation arise or service is required, call the factory for instructions.
Pacific Power Source Corporation maintains a staff of highly trained technicians who are ready
to assist. The phone number to call is (714)898-2691.
7.2 SYSTEM LEVEL FACTORY PART NUMBERS
200405
7.3 SUB-ASSEMBLY AND CHASSIS COMPONENT PART NUMBERS
The factory part numbers given in the following list are provided to aid the user in obtaining
spare or repair sub-assemblies and components where the factory has given permission, in
advance, for the user to perform field repairs on the Power Source.
SUB-ASSEMBLY FACTORY PART No.
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SECTION 8
INDEX
A
Airflow ............................................................ 13, 15
Altitude ................................................................. 13
Amps to Volts Ratio Setting .............................. 15
AUX I/O ............................................................... 20
Overload ................................................................ 8
Over-temperature ............................................... 25
P
Pollution Degree .............................................. 13
Power Factor .................................................. 8, 10
B
Bandwidth ........................................................... 10
C
Caution ...................................................... 4, 23, 24
Controller
Manual Controller ............................................ 6
Programmable Controller ............................... 6
CSC ........................................................................ 6
Current Limit ....................................................... 11
D
DC Offset............................................................. 11
E
External Sense ................................................... 21
I
Input Current
ACX ................................................................... 7
Isolation ............................................................... 11
O
Output Current ...................................................... 8
R
Regulation ........................................................... 10
Remote Interface
GPIB ................................................................ 15
RS-232 ...................................................... 15, 19
S
Shutdown
Conditions ...................................................... 25
Fault .......................................................... 13, 25
Reset ............................................................... 25
Split Phase .......................................................... 18
T
THD ...................................................................... 10
Transient Response .......................................... 10
V
Ventilation ........................................................... 15
W
Warning ........................................... 2, 4, 14, 18, 32
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SECTION 9
MODIFICATIONS AND CHANGE NOTICES
9 MODIFICATIONS AND CHANGE NOTICES
In cases where customer specified modifications have been installed in the equipment, the
modifications will be described on the following pages. If present, be sure to notice any special
instructions relative to operation and calibration of the system.
Product change notices or manual errata will be provided in hard copy format. If you printed out
this manual, please place these additional pages in this section.
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