Elgar CW 2501P User manual

CW-P SERIES
PROGRAMMABLE
AC POWER SOURCE
Operation Manual
This manual covers models:
CW 801P
CW 1251P
CW 2501P
CW 801P–H
CW 1251P–H
CW 2501P–H
CW 801P–V
CW 1251P–V
CW 2501P–V
ELGAR ELECTRONICS CORPORATION
9250 Brown Deer Road
San Diego, CA 92121-2294
1-800-733-5427
Tel: [phone]
Fax: [phone]
Email: [email protected]
www.elgar.com
©2003 by Elgar Electronics Corporation
This document contains information proprietary to Elgar Electronics Corporation. The information contained herein is not
to be duplicated or transferred in any manner without prior written permission from Elgar Electronics Corporation.
June 27
,
2003 Document No. M161691-01 Rev H

.

i
SAFETY NOTICE
Before applying power to the system, verify that the instrument is configured properly for the user’s
particular application.
WARNING!
Hazardous voltages may be present when covers are removed.
Qualified personnel must use extreme caution when servicing this
equipment. Circuit boards, test points, and output voltages also
may be floating above (below) chassis ground.
Installation and service must be performed by qualified personnel who are aware of dealing properly
with attendant hazards. This includes such simple tasks as fuse verification.
Ensure that the AC power line ground is connected properly to the chassis. Similarly, other power
ground lines including those to application and maintenance equipment must be grounded properly for
both personnel and equipment safety.
Always ensure that facility AC input power is de-energized prior to connecting or disconnecting any
cable.
During normal operation, the operator does not have access to hazardous voltages within
the chassis. However, depending on the user’s application configuration, HIGH
VOLTAGES HAZARDOUS TO HUMAN SAFETY may be generated normally on the output
terminals. Ensure that the output power lines are labeled properly as to the safety hazards
and that any inadvertent contact with hazardous voltages is eliminated.
Guard against risks of electrical shock during open cover checks by not touching any portion of the
electrical circuits. Even when power is off, capacitors may retain an electrical charge. Use safety
glasses during open cover checks to avoid personal injury by any sudden component failure.
Due to filtering, the unit has high leakage current to the chassis. Therefore, it is essential to operate this
unit with a safety ground.
Some circuits are live even with the front panel switch turned off. Service, fuse verification, and
connection of wiring to the chassis must be accomplished at least five minutes after power has been
removed via external means; all circuits and/or terminals to be touched must be safety grounded to the
chassis.
These operating instructions form an integral part of the equipment and must be available to the
operating personnel at all times. All the safety instructions and advice notes are to be followed.
Neither Elgar Electronics Corporation, San Diego, California, USA, nor any of the subsidiary sales
organizations can accept any responsibility for personnel, material or inconsequential injury, loss or
damage that results from improper use of the equipment and accessories.

ii
SAFETY SYMBOLS
CAUTION
Risk of Electrical Shock
CAUTION
Refer to Accompanying Documents
Off (Supply)
Standby (Supply)
On (Supply)
Protective Conductor Terminal
Fuse
Direct Current (DC)
Alternating
Three–Phase
Earth (Ground) Terminal
Chassis Ground
Current (AC)
Alternating Current

ELGAR ONE–YEAR WARRANTY
Elgar Electronics Corporation (hereinafter referred to as Elgar) warrants its products to be free from
defects in material and workmanship. This warranty is effective for one year from the date of shipment of
the product to the original purchaser. Liability of Elgar under this warranty shall exist provided that:
• the Buyer exposes the product to normal use and service and provides normal maintenance on the
product;
• Elgar is promptly notified of defects by the Buyer and that notification occurs within the warranty
period;
• the Buyer receives a Return Material Authorization (RMA) number from Elgar’s Repair Department
prior to the return of the product to Elgar for repair, phone 800-73-ELGAR (800-733-5427), ext. 2295;
• the Buyer returns the defective product in the original, or equivalent, shipping container;
• if, upon examination of such product by Elgar it is disclosed that, in fact, a defect in materials and/or
workmanship does exist, that the defect in the product was not caused by improper conditions,
misuse, or negligence; and,
• that Elgar QA seal and nameplates have not been altered or removed and the equipment has not
been repaired or modified by anyone other than Elgar authorized personnel.
This warranty is exclusive and in lieu of all other warranties, expressed or implied, including, but not
limited to, implied warranties of merchantability and fitness of the product to a particular purpose. Elgar,
its agents, or representatives shall in no circumstance be liable for any direct, indirect, special, penal, or
consequential loss or damage of any nature resulting from the malfunction of the product. Remedies
under this warranty are expressly limited to repair or replacement of the product.
CONDITIONS OF WARRANTY
• To return a defective product, contact an Elgar representative or the Elgar factory for an RMA number.
Unauthorized returns will not be accepted and will be returned at the shipper’s expense.
• For Elgar products found to be defective within thirty days of receipt by the original purchaser, Elgar
will absorb all ground freight charges for the repair. Products found defective within the warranty
period, but beyond the initial thirty-day period, should be returned prepaid to Elgar for repair. Elgar will
repair the unit and return it by ground freight pre-paid.
• Normal warranty service is performed at Elgar during the weekday hours of 7:30 am to 4:30 pm Pacific
time. Warranty repair work requested to be accomplished outside of normal working hours will be
subject to Elgar non-warranty service rates.
• Warranty field service is available on an emergency basis. Travel expenses (travel time, per diem
expense, and related air fare) are the responsibility of the Buyer. A Buyer purchase order is required
by Elgar prior to scheduling.
• A returned product found, upon inspection by Elgar, to be in specification is subject to an inspection
fee and applicable freight charges.
• Equipment purchased in the United States carries only a United States warranty for which repair must
be accomplished at the Elgar factory.
Committed to Quality...Striving for Excellence
iii

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CONTENTS
SECTION 1 INTRODUCTION............................................................1-1
SECTION 2 SPECIFICATIONS..........................................................2-1
2.1 Output................................................................................................... 2-1
2.2 Measurement........................................................................................ 2-3
2.3 Input ..................................................................................................... 2-5
2.4 Protection ............................................................................................. 2-6
2.5 Rear Panel Connections....................................................................... 2-6
2.6 General................................................................................................. 2-6
2.7 Options and Accessories...................................................................... 2-7
SECTION 3 INSTALLATION.............................................................3-1
3.1 Unpacking............................................................................................. 3-1
3.2 Wire Gauge Selection........................................................................... 3-2
3.3 Mounting Instructions ........................................................................... 3-5
3.4 Cooling ................................................................................................. 3-5
3.5 Power In Connections ........................................................................ 3-10
3.5.1 Single–Phase Supply Connections ......................................... 3-10
3.5.2 Split-Phase Supply Connections 120–0–120V........................ 3-11
3.5.3 Three–Phase Supply Connections.......................................... 3-11
3.6 Power Out Connections...................................................................... 3-12
3.7 Sense Connections ............................................................................ 3-13
Operation Manual v

Contents Elgar CW-P Series
3.8 Remote Control Signal ........................................................................3-15
3.8.1 Analog Amplitude Control........................................................3-15
3.8.2 Lock to External Frequency Source.........................................3-15
3.8.3 Sync Output Pulse...................................................................3-16
3.9 Master/Slave Configurations ...............................................................3-16
3.9.1 Setup for Single–Phase, Two Units .........................................3-17
3.9.2 Setup for Three–Phase, Two Units per Phase ........................3-20
SECTION 4 OPERATION ................................................................. 4-1
4.1 CW Front Panel Controls and Indicators...............................................4-1
4.2 Front Panel Overview............................................................................4-4
4.3 Power Up ..............................................................................................4-5
4.4 Programmed Frequency Steps .............................................................4-6
SECTION 5 PROGRAMMING........................................................... 5-1
5.1 Programming the CW Via the Front Panel ............................................5-1
5.1.1 VOLTAGE/POWER Section ......................................................5-2
5.1.2 CURRENT/FREQUENCY Section.............................................5-2
5.2 Measurement Operations......................................................................5-2
5.2.1 Supply Measurements on the Left Display ................................5-2
5.2.2 Supply Measurements on the Right Display..............................5-3
5.3 Menu Operations...................................................................................5-4
5.3.1 Self Test ....................................................................................5-5
5.3.2 Set GPIB Port ............................................................................5-5
5.3.3 Specify Current Limit Type ........................................................5-6
5.3.4 Specify Shutdown Delay............................................................5-6
5.3.5 Specify Program Keys Locked Mode.........................................5-6
5.3.6 Store Present Machine Settings ................................................5-6
5.3.7 Recall Machine Settings ............................................................5-7
5.3.8 Specify Relay State After Power Up Initialization ......................5-7
5.3.9 Clock Direction ..........................................................................5-7
5.3.10 Analog Input State....................................................................5-7
vi Operation Manual

Elgar CW-P Series Contents
5.3.11 RMS Voltage Loop................................................................... 5-8
5.3.12 Phase A Offset ........................................................................ 5-8
5.3.13 Phase B Offset ........................................................................ 5-8
5.3.14 Phase C Offset ........................................................................ 5-8
5.3.15 Slave Channel ......................................................................... 5-8
5.3.16 Slave Address.......................................................................... 5-8
5.3.17 Slave Configuration ................................................................. 5-8
SECTION 6 MAINTENANCE.............................................................6-1
6.1 Periodic Service.................................................................................... 6-1
6.2 Fuse Replacement ............................................................................... 6-1
LIST OF FIGURES
Figure 1–1 ContinuousWave Front Panel (Model CW 801P)......................1-1
Figure 3–1 Slide Mounting ..........................................................................3-5
Figure 3–2 Mounting Dimensions, Front and Rear Views
(CW 801P and CW 1251P).......................................................3-6
Figure 3–3 Mounting Dimensions, Front and Rear Views (CW 2501P) ......3-7
Figure 3–4 Mounting Dimensions, Top and Side Views
(CW 801P and CW 1251P).......................................................3-8
Figure 3–5 Mounting Dimensions, Top and Side Views (CW 2501P)........3-9
Figure 3–6 Input Power Connections........................................................3-10
Figure 3–7 Output Power Connections.....................................................3-12
Figure 3–8 Output Voltage Sensing Configuration....................................3-13
Figure 3–9 Sense Connections.................................................................3-14
Figure 3–10 M/S IN Connector ...................................................................3-15
Figure 3–11 Wiring Diagram for One Phase, Master/Slave Configuration..3-17
Figure 3–12 Wiring Diagram for Three Phase, Master/Slave Configuration3-20
Figure 4–1 Front Panel Controls (CW 801P) ..............................................4-1
Operation Manual vii

Contents Elgar CW-P Series
LIST OF TABLES
Table 3–1 Recommended Wire Gauge Selection Guide ............................. 3-2
Table 3–2 Recommended Cables ............................................................. 3-11
Table 6–1 Replacement Fuses.................................................................... 6-1
viii Operation Manual

SECTION 1
INTRODUCTION
Elgar's ContinuousWave™ (CW) Series power sources deliver 800 VA or 1250 VA in a
2U high (3.5 inches), and 2500 VA in a 5.25–inch benchtop or rackmount chassis.
Higher power and multiphase can be achieved by paralleling and multiphase
interconnection. This requires optional slave cables. The switchmode Power Factor
Corrected (PFC) input stage allows a wide range of input voltage and maximizes the
power available from a wall outlet.
The CW series units are available in manual and programmable versions. This
operation manual covers the programmable versions only.
Voltage, current, and frequency settings are quickly adjusted from the front panel
encoders. In addition, the sources can be programmed remotely from the rear panel
GPIB, RS-232, or analog port. The output is protected against overvoltage, overcurrent,
and overtemperature conditions. A two-speed fan results in quieter operation at lower
power levels.
Figure 1–1 ContinuousWave Front Panel (Model CW 801P)
Key features of the CW Series AC power sources include:
• High performance/value design
• 800, 1250, and 2500 VA units available
• Low profile 3.5" rack height required for up to 1250 VA;
5.25" rack height required for 2500 VA
• Bench top or rack mount (optional slides available)
Operation Manual 1-1

Introduction Elgar CW-P Series
• 1 phase 45 to 500 Hz AC output; 45-1000 Hz with H–Option.
Units may be connected in multiphase configuration and/or paralleled for higher
powers. (Consult factory for more than two units paralleled.) Multiphase/paralleling
cables are optional.
• Transformer coupled output with disconnect relays
• 0 to 135V and 0 to 270V ranges; 0 to 155V and 0 to 310V ranges with V–Option
• CW 801P and CW 1251P versions have universal output socket on front panel.
All units have output power available at rear of unit.
• Remote sense leads for accurate output voltage
• Input PFC provides maximum utilization of available outlet current and wide range of
input voltage and frequency
• CE mark
• UL/CUL (consult factory for availability)
• GPIB and RS-232 control
• Two large, 7-segment LED, 4-digit displays on front panel
• Set volts, overvoltage, frequency, current, and overcurrent by two front panel
encoders
• Measure voltage, wattage, VA, power factor, current, peak current, and crest factor
• Display overvoltage, frequency, and overcurrent setting
• Over current shutdown or constant current mode menu-selectable
• Enable/disable output voltage rms loop menu-selectable
• Sync in, clock out, and analog programming of output voltage available through rear
panel connector. These items are menu-selectable.
• Front panel lockout; measurement active
• Stored settings including: Power up to previous front panel setting or 0V
• 2-speed fan for low noise
• Side air intake, exhaust to rear
• All connectors on rear
(output power also available at front for CW 801P and CW 1251P)
• Chassis depth 20" (front panel and rear connectors add additional depth)
• Will fit in 24" RETMA rack system
• 1-year calibration interval, covers on soft calibration
1-2 Operation Manual

SECTION 2
2.1 Output
SPECIFICATIONS
POWER
CW 801P 800 VA
CW 1251P 1250 VA
CW 2501P 2500 VA
Power Factor of Load 0 lag to 0 lead
Phase All models single phase output
VOLTAGE
Ranges 0 to 135 VRMS or 0 to 270 VRMS, user selectable
V–Option: 0 to 155 VRMS or 0 to 310 VRMS, user
selectable
Accuracy ±0.1% of full scale <100 Hz, ±0.2% of full scale ≥100 Hz
at >5 VRMS output
H–Option: ± 0.3% of full scale >500 Hz
Resolution 0.1 VRMS
AC Noise Level CW 801/1251P: <50 mVRMS typical in low-voltage range
<85 mVRMS typical in high-voltage range
CW 2501P: <100 mVRMS typical in low-voltage range
<170 mVRMS typical in high-voltage range
H–Option/V–Option:
CW 801/1251P: <75 mVRMS typical in low-voltage range
<125 mVRMS typical in high-voltage range
CW 2501P: <125 mVRMS typical in low-voltage range
<225 mVRMS typical in high-voltage range
Operation Manual 2-1

Specifications Elgar CW-P Series
Total Harmonic
Distortion
0.25% typical ≤60 Hz; add 0.05%/10 Hz from >60 Hz to
100 Hz; add 0.5%/100 Hz at >100 Hz
H–Option: 0.5% typical ≤60 Hz; add 0.05%/10 Hz from
>60 Hz to 100 Hz; add 0.5%/100 Hz at >100 Hz up to 3.7%;
increasing to 6% at 10% of full scale voltage, 100% full scale
current, and full scale frequency
Amplitude Stability ±0.05% of full scale over 8 hours at constant line, load and
temperature after 15 minute warm-up typical
Load Regulation ±0.1% full scale voltage for full resistive load to no load
(<10 mVRMS typical, measured at point of sense)
Line Regulation ±0.1% of full scale voltage for a ±10% line change from
nominal line voltage
(<5 mVRMS typical, measured at point of sense)
Remote Voltage Sense 5 VRMS total lead voltage drop
CURRENT
CW 801P(–H) 6.0 ARMS (135 VAC range), 3.0 ARMS (270 VAC range)
CW 1251P(–H) 9.4 ARMS (135 VAC range), 4.7 ARMS (270 VAC range)
CW 2501P(–H) 18.6 ARMS (135 VAC range), 9.3 ARMS (270 VAC range)
CW 801P–V 5.2 ARMS (155 VAC range), 2.6 ARMS (310 VAC range)
CW 1251P–V 8.2 ARMS (155 VAC range), 4.1 ARMS (310 VAC range)
CW 2501P–V 16.2 ARMS (155 VAC range), 8.1 ARMS (310 VAC range)
Accuracy ±0.5% of full scale typical; for linear loads and
>0.12 ARMS for CW 801P, >0.19 ARMS for CW 1251P,
>0.37 ARMS for CW 2501P
H–Option/V–Option: ±0.75% of full scale and ≤500 Hz; ±1.0%
of full scale and >500Hz
Resolution 0.01 ARMS
FREQUENCY
Range 45 to 500 Hz (45 to 1000 Hz for H-Option)
Accuracy ±0.02% maximum
Resolution 0.1 Hz, 0.01 Hz for remote programming
2-2 Operation Manual

Elgar CW-P Series Specifications
PHASE
Range -359 to +359 degrees
Positive phase indicates time lag from reference
Accuracy Within 100 microseconds of equivalent angle
Resolution 1 degree
2.2 Measurement
VOLTAGE
Range 0 to 270 VRMS; V–Option: 0 to 310 VRMS
Accuracy ±0.1% of range <100 Hz; ±0.2% of range ≥100Hz;
at >5 VRMS output; measured at point of remote sense
H-Option: ±0.3% of range >500 Hz
Resolution 0.1 VRMS
CURRENT*
Range
CW 801P 0 to 6.0 ARMS
CW 1251P 0 to 9.4 ARMS
CW 2501P 0 to 18.6 ARMS
Accuracy ±0.5% of range typical; for linear loads and
>0.12 ARMS for CW 801P, >0.19 ARMS for CW 1251P,
>0.37 ARMS for CW 2501P
H–Option/V–Option: ±0.75% of range and ≤500 Hz;
±1.0% of range and >500 Hz
Resolution 0.01 ARMS
PEAK INSTANTANEOUS CURRENT*
Range
CW 801P 0 to 25A
CW 1251P 0 to 35A
CW 2501P 0 to 70A
Accuracy ±2% of range typical; at >2% current range
Resolution 0.1A
Operation Manual 2-3

Specifications Elgar CW-P Series
PEAK INRUSH CURRENT* (Available in Remote Mode only)
Range
CW 801P 0 to 25A
CW 1251P 0 to 35A
CW 2501P 0 to 70A
Accuracy ±2% of range, typical; at >2% of RMS current range
Resolution 0.1A
FREQUENCY
Range 45 to 500 Hz
H-Option: 45 to 1000 Hz
Accuracy ±0.02% of value
Resolution of Display 0.1 Hz
POWER*
Range
CW 801P 0 to 800W
CW 1251P 0 to 1250W
CW 2501P 0 to 2500W
Accuracy ±2% of range for linear loads, typical
Resolution 1W
APPARENT POWER*
Range
CW 801P 0 to 800 VA
CW 1251P 0 to 1250 VA
CW 2501P 0 to 2500 VA
Accuracy ±2% of range for linear loads, typical
Resolution 1 VA
2-4 Operation Manual

Elgar CW-P Series Specifications
POWER FACTOR*
Range 0 to 1
Accuracy ±4% of range for linear loads, typical; at >10% of power
range
Resolution 0.01
CREST FACTOR*
Range 0 to 3.5
Accuracy ±5% of range, typical; at 10% of RMS current range
Resolution 0.01
2.3 Input
VOLTAGE AND FREQUENCY
CW 801P 90 to 264 VRMS, 47 to 63 Hz, single-phase
CW 1251P 103 to 264 VRMS, 47 to 63 Hz, single-phase
CW 2501P 180 to 264 VRMS, 47 to 63 Hz, single-phase
CURRENT
CW 801P(–H)(–V) 13.5 ARMS, maximum at 90 VRMS
CW 1251P(–H)(–V) 17.7 ARMS , maximum at 103 VRMS
CW 2501P(–H)(–V) 19.7 ARMS , maximum at 180 VRMS
POWER FACTOR >0.99 typical at full load nominal line
EFFICIENCY >73% typical at full load
H–Option/V–Option at 1,000 Hz: CW 801P, >68% typical;
CW 1251P, >70% typical; CW 2501P, >72% typical
*Note: In a parallel system, the current/power displayed on the master unit is the sum of
all units in the system.
Operation Manual 2-5

Specifications Elgar CW-P Series
2.4 Protection
2.5
2.6 General
Overcurrent: Shutdown mode
Accuracy: +/- 1% of full scale, for linear loads with current
>0.2 ARMS for CW 801P / CW 1251P, >0.4ARMS for CW 2501P
Over Voltage: Accuracy: +/-2% of full scale
Range: 35-300 VAC; V–Option: 35-344 VAC
Over Temperature: Internal monitor
Isolation Range: 500 VRMS between either output terminal and chassis.
Rear Panel Connections
GPIB
RS-232
M/S OUT
M/S IN
ANALOG SLAVE
Power In and Power Out Terminal Strips (see Sections 3.5 and 3.6)
DIMENSIONS
CW 801P: 3.5" (89 mm) H x 19" (483 mm) W x 20.6" (524 mm) D
CW 1251P: 3.5" (89 mm) H x 19" (483 mm) W x 20.6" (524 mm) D
CW 2501P: 5.25" (133 mm) H x 19" (483 mm) W x 20.6" (524 mm) D
WEIGHT
CW 801P: 48 lbs. (22 kg)
CW 1251P: 53 lbs. (24 kg)
CW 2501P: 86 lbs. (40 kg)
2-6 Operation Manual