) years from the date of delivery against defe cts
in material and workmanship. This does not apply to products damaged through
accident, abuse, misuse , or unauthori zed repair. The manufacturer shall not be l iable
for any special or consequen tial dama ge of any nature. Th e manufact urer will repair
or replace the non-conforming product or issue credit, at its option, provided the
manufacturer’s inspection establishes the existence of a defect. Packing, freight,
insurance, and other charges incurred in returning the defective products to the
manufacturer will be paid by the purchaser . The manufac turer will pay return fr eight
if the repaired unit is deemed to be under warranty. If any questions arise conce rning
the warranty, check with the manufacturer prior to taking any action.
When requesting informat ion, assistance, or authorization, please state the serial
number of the unit, available f rom the label on t he rear pane l of the unit . Give a brief
description of the problem. For information about packaging and shipping, see
“Packaging for Shipping or Storage,” p. 21.
Information
About Y our
Power
Supply
Release
Please record the following information when you first open your Power Supply
package:
Model Number_____________________________________________
Serial Number_____________________________________________
Exercise caution when using and calibrating a power supply. High energy levels
can be stored at the output voltage terminals on a power supply in normal
operation. In addition, potentially lethal voltages exist in the power circuit and on
the output and sense connectors of a power supply with a rated output greater
than 40 V. Filter capaci tors store potentially dangerous energy for some ti me after
power is removed.
CAUTION
!
Operate the power supply in an environment free of flammable gases or fumes.
To ensure that the power supply’s safety features are not compromised, use the
power supply as specified in this manual and do not substitute parts or make any
unauthorized modifications. Contact the service technician for service and repair
help. Repairs must be made by experienced service technicians only.
Warnings,
Cautions,
and Notes
Warnings, cautions, and no t es are define d and formatted in this manual as shown
below.
WARNING
Describes a potential hazard which could result in injury or death, or, a procedure
which, if not performed correctly, could result in injury or death.
CAUTION
!
Describes a procedure which, if not performed correctly, could result in damage
to data, equipment, or systems.
Note
Describes additional operating information which may affect the performance of the
equipment.
Release 1.0
iii
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Operating Manual for LV 1kW Series Power Supply
About This M anual
This Operating Manual contains user information for the LV Series of variable DC
output power supplies , available in several vol tage models at 1000 W atts. It provid es
information about features and specifications, installation procedures, and basic
functions testing, as wel l as operating procedures for using both front panel control
and remote analog programming functions.
Who Should Use This Manual
This manual is designed for the user who is familiar with basic el ectrical laws
especially as they apply to the operation of power supplies. This implies a
recognition of Constant Voltage and Constant Current operating modes and the
control of input a nd output power , as well a s the observance of safe techniqu es while
making supply or pin connections and any changes in switch settings.
M ain Se ctions
Section 1 Features and Specifications
its features and specifications.
Section 2 Installation
inspection, cleaning, shipping, and storage procedures. Includes AC input
connection, basic functions testing, and load and sense lines connections.
Section 3 Operation
Includes procedures for using over voltage protection, shutdown function, multiple
supplies, and over temperature protection.
Section 4 Calibration
accuracy.
Manual Revisions
The current release of this manual is listed below. Insert pages may update already
printed manuals. Insert material incorporated into a reprinted manual may be
identified with a change bar in the page margin.
Release 1.0 (2002-01)
Describes the power supply and lists
Goes through basic setup procedures. Describes
Provides procedures for local (front panel) operation.
Includes calibration for programming and readback
Release 1.0
v
About This Manual
Power Supply Safety Markings
Alternating CurrentOff (Supply)
Earth (Ground) TerminalCaution (Hot Surface)
Protective Conductor TerminalCaution (Check manual for
This series of power supplie s provides highly stable, variable DC output vol tage and
current at 1000 Watts of output power. You can select from several remote control
choices: standard ana log programming, o ptional isol ated programmin g or readback,
and optional GPIB programming or RS-232 cont rol. It i s designed for a broad range
of development, system a nd burn-i n applic ations a nd uses high f requency switching
regulator technology to achieve high power density in a small package size. See
Table 1.1. for the list of available models.
Table 1.1 Available Voltage and Current Ranges
ModelVoltage RangeCurrent Range
8-1250-8 V0-125 A
20-500-20 V0-50 A
33-330-33 V0-33 A
40-250-40 V0-25 A
60-180-60 V0-18 A
80-130-80 V0-13 A
150-70-150 V0-7 A
300-3.50-300 V0-3.5 A
600-1.70-600 V0-1.7 A
Release 1.0
9
Features and Specifications
Features and Options
Features and Options
Simultaneous digital display of both voltage and current.
•
Ten-turn front panel voltage and current controls for high resolution setting of
•
the output voltage and current from zero to the rated output.
Automatic mode crossover into current or voltage mode.
•
115/230 Vac selectable input voltage, 47–63 Hz single phase.
•
High frequency switching technology allows high power density, providing
•
increased power output in a small, light package.
Multiple units can be connected in parallel or in series to provide increased
•
current or voltage and operated in master/slave mode.
Remote sensing to compensate for losses in power leads up to 1 V per lead
•
(0.5 V for 8 V model).
Adjustable Over Temperature Protection (OTP).
•
External TTL, AC, or DC shutdown.
•
Remote voltage, current l imit and over voltage protection (OVP) programming
•
with selectable programming ranges.
External indicator signals for remote monitoring of O VP status, lo cal/remote
•
programming status, ther mal shutdown and output voltage and current.
Isolated analog remote programming control of the output voltage or current
•
with the optional ISOL Interface.
Optional internal GPIB control for remote digital programming and readback
•
from a computer.
Front Panel Controls
See Figure 1.1 to review the controls, LEDs, and meters located on the power
supply’ s front panel. Check the following sect ions for additional de scriptions of front
panel controls and functions.
“Mechanical Specifications” on page 18
•
“Functional Tests” on page 25
•
Section 3, “Operation”
•
10
Operating Manual for LV 1kW Series Power Supply
Features and Specifications
Front Panel Controls
Release 1.0
Figure 1.1 Power Supply Front Panel
11
Features and Specifications
Rear Panel Connectors and Switch
Rear Panel Connectors and Switch
The input AC power, output DC power, as well as the remote program sense and
monitor connector are l ocated on the rear panel. The program and monitor f unction
selector switch (S W1) is located inte rnally on the main PCB. See Figure 1.2, on page
13 for locations. Refer to Section 2, “Installation” for detail on procedures for
connections and settings.
12
Operating Manual for LV 1kW Series Power Supply
Features and Specifications
Rear Panel Co nnectors an d Switch
Release 1.0
Figure 1.2 Power Supply Rear Panel
13
Features and Specifications
Specifications
Specifications
Electrical
These specifications are warrante d over a temperature range of 0 °C to 50 °C.
Specifications
Specifications are subject to change without notice.
Table 1.2 Electrical Specifications for 8 V to 60 V Models
Models8-12520-5033-3340-2560-18
Output Ratings:
Output Voltage
Output Current
Output Power
Line Regulation:
Voltage
1
Current
Load Regulation:
2
Voltage
Current
Meter Accuracy:
Voltage
Current
OVP Adjustment Range: 0.4-8.8 V1.0-22 V1.65-36.3 V2-44 V3-66 V
Output Noise and Ripple:
(20 Hz - 20 MHz)
Voltage (p-p)
Voltage (rms)
3
Drift:
Voltage
Current
Temperature Coefficient:
4
Voltage
Current
Nominal Output Capacitance: 66,000
Nominal Capacitance
(Output to Chassis): 200nF
1. For input voltage variation over the AC input voltage range, wi th con st ant ra t ed l oad .
2. For 0-100% load variation, with constant nominal lin e vol tage.
3. Maximum drift over 8 hou rs with constant line, load and temper at ur e, af te r 9 0 m in ut e warm-up.
4. Change in output per °C c hange in ambient temperature, w ith constant line and load.
0-8 V
0-125 A
1000 W
8mV
125 mA
8mV
125 mA
0.09 V
1.35 A
50 mV
10 mV
4mV
62.5 mA
1.6 mV
37.5 mA
µF
0-20 V
0-50 A
1000 W
20 mV
50 mA
20 mV
50 mA
0.3 V
0.6 A
50 mV
10 mV
10 mV
25 mA
4mV
15 mA
30,000
270n
F
µF
0-33 V
0-33 A
1089 W
33 mV
33 mA
33 mV
33 mA
0.43 V
0.43 A
100 mV
10 mV
16.5 mV
16.5 mA
6.6 mV
9.9 mA
10,000
300n
F
µF
0-40 V
0-25 A
1000 W
40 mV
25 mA
40 mV
25 mA
0.5 V
0.35 A
100 mV
10 mV
20 mV
12.5 mA
8mV
7.5 mA
10,000
250n
F
µF
0-60 V
0-18 A
1080 W
60 mV
18 mA
60 mV
18 mA
0.7 V
0.28 A
150 mV
20 mV
30 mV
9mA
12 mV
5.4 mA
10,000
250n
µF
F
14
Operating Manual for LV 1kW Series Power Supply
Features and Specifications
Table 1.3 Electrical Specifications for 80 V to 600 V Models
Models80-13150-7300-3.5600-1.7
Output Ratings:
Output Voltage
Output Current
Output Power
Line Regulation:
Voltage
Current
Load Regulation:
Voltage
Current
1
2
0-80 V
0-125 A
1040 W
80 mV
13 mA
80 mV
13 mA
0-150 V
0-7 A
1050 W
150 mV
7mA
150 mV
7mA
0-300 V
0-3.5 A
1050 W
300 mV
3.5 mA
300 mV
3.5 mA
0-600 V
0-1.7 A
1020 W
600 mV
1.7 mA
600 mV
1.7 mA
Meter Accuracy:
Voltage
Current
0.9 V
0.23 A
1.6 V
0.08 A
4.0 V
0.045 A
7.0 V
0.018 A
OVP Adjustment Range: 4-88 V7.5-165 V15-330 V30-660 V
Output Noise and Ripple:
(20 Hz - 20 MHz)
Voltage (p-p)
Voltage (rms)
3
Drift:
Voltage
Current
Temperature Coefficient:
4
Voltage
Current
Nominal Output Capacitance: 3,000
150 mV
20 mV
40 mV
6.5 mA
16 mV
3.9 mA
µF
200 mV
30 mV
75 mV
3.5 mA
30 mV
2.1 mA
440
µF
200 mV
40 mV
150 mV
1.75 mA
60 mV
1.05 mA
440
µF
500 mV
100 mV
300 mV
0.85 mA
120 mV
0.51 mA
4.7
µF
Nominal Capacitance
250n
(Output to Chassis): 250nF
1. For input voltage variation over the AC input voltage range, wi th con st ant ra t ed l oad .
2. For 0-100% load variation, with constant nominal lin e vol tage.
3. Maximum drift over 8 hou rs with constant line, load and temper at ur e, af t er 9 0 m in ut e warm-up.
4. Change in output per °C c hange in ambient temperature, w ith constant line and load.
F
270n
F
220n
F
Specifications
Release 1.0
15
Features and Specifications
Specifications
Additional
Specifications
Rise Time (No Load, Full Load):
Fall Time (No Load):
Fall Time (Full Load):
Voltage Mode Transient Response:21ms
Time Delay from power on until
output stable
1.Measured with stepped 0-10 V analog programming source and a resistive load.
2.Time for the output voltage to recover within 1% band for 30% step load change from
70% to 100% or 100% to 70%.
Input
Conditions
1
300 ms (full load and no load)
1
1
5s
200 ms
2 s maximum
Additional
Features
Rated AC Input Voltage with
Maximum Input Current
200-250 Vac at 10 Arms or 100-130 Vac at
20 Arms
Maximum AC Input Power1300 W at full load
Operational AC Input Voltage200-250 Vac or 100-130 Vac
Input Frequency Range47-63 Hz
Power Factorapprox. 0.7 at full load