Agilent Technologies 6814B User manual

User’s Guide
AC Power Solutions
Agilent Models 6814B, 6834B, and 6843A
For instruments with Serial Numbers:
Agilent 6814B: 3601A-00101 through 00270
US36010101-up
Agilent 6834B: 3601A-00101 through 00140
US36010101-up
Agilent 6843A: 3540A-00101 through 00140
US35400101-up
Agilent Part No. 5962-0887 Printed in U.S.A.
Microfiche No 5962-0888 December, 1998
Update April 2000

2
Warranty Information
CERTIFICATION
Agilent Technologies certifies that this product met its published specifications at time of shipment from the factory.
Agilent Technologies further certifies that its calibration measurements are traceable to the United States National
Bureau of Standards, to the extent allowed by the Bureau’s calibration facility, and to the calibration facilities of other
International Standards Organization members.
WARRANTY
This Agilent Technologies hardware product is warranted against defects in material and workmanship for a period
of three years from date of delivery. Agilent Technologies software and firmware products, which are designated by
Agilent Technologies for use with a hardware product and when properly installed on that hardware product, are
warranted not to fail to execute their programming instructions due to defects in material and workmanship for a
period of 90 days from date of delivery. During the warranty period Agilent Technologies will, at its option, either
repair or replace products which prove to be defective. Agilent Technologies does not warrant that the operation for
the software firmware, or hardware shall be uninterrupted or error free.
For warranty service, with the exception of warranty options, this product must be returned to a service facility
designated by Agilent Technologies. Customer shall prepay shipping charges by (and shall pay all duty and taxes)
for products returned to Agilent Technologies for warranty service. Except for products returned to Customer from
another country, Agilent Technologies shall pay for return of products to Customer.
Warranty services outside the country of initial purchase are included in Agilent Technologies product price, only if
Customer pays Agilent Technologies international prices (defined as destination local currency price, or U.S. or
Geneva Export price).
If Agilent Technologies is unable, within a reasonable time to repair or replace any product to condition as warranted,
the Customer shall be entitled to a refund of the purchase price upon return of the product to Agilent Technologies.
LIMITATION OF WARRANTY
The foregoing warranty shall not apply to defects resulting from improper or inadequate maintenance by the
Customer, Customer-supplied software or interfacing, unauthorized modification or misuse, operation outside of the
environmental specifications for the product, or improper site preparation and maintenance. NO OTHER
WARRANTY IS EXPRESSED OR IMPLIED. AGILENT TECHNOLOGIES SPECIFICALLY DISCLAIMS THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
EXCLUSIVE REMEDIES
THE REMEDIES PROVIDED HEREIN ARE THE CUSTOMER’S SOLE AND EXCLUSIVE REMEDIES. AGILENT
TECHNOLOGIES, INC. SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR
CONSEQUENTIAL DAMAGES, WHETHER BASED ON CONTRACT, TORT, OR ANY OTHER LEGAL THEORY.
ASSISTANCE
The above statements apply only to the standard product warranty. Warranty options, extended support contacts,
product maintenance agreements and customer assistance agreements are also available. Contact your nearest
Agilent Technologies Sales and Service office for further information on Agilent Technologies’ full line of Support
Programs.

3
Safety Summary
The
f
ollowin
g
g
eneral sa
f
et
y
p
recautions must be observed durin
g
all
p
hases o
f
o
p
eration o
f
this instrument.
Failure to com
p
l
y
with these
p
recautions or with s
p
eci
f
ic warnin
g
s elsewhere in this manual violates sa
f
et
y
standards o
f
desi
g
n, manu
f
acture, and intended use o
f
the instrument. A
g
ilent Technolo
g
ies assumes no liabilit
y
f
or the customer’s
f
ailure to com
p
l
y
with these re
q
uirements.
WARNING: LETHAL VOLTAGES
Ac sources can supply 425 V peak at their output. DEATH on contact may result if the output terminals or circuits
connected to the output are touched when power is applied.
GENERAL
This product is a Safety Class 1 instrument (provided with a protective earth terminal). The protective features of
this product may be impaired if it is used in a manner not specified in the operation instructions.
Any LEDs used in this product are Class 1 LEDs as per IEC 825-1.
ENVIRONMENTAL CONDITONS
This instrument is intended for indoor use in an installation category III, pollution degree 2 environment. It is
designed to operate at a maximum relative humidity of 95% and at altitudes of up to 2000 meters. Refer to the
specifications tables for the ac mains voltage requirements and ambient operating temperature range.
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage, the correct fuse is installed, and all safety
precautions are taken. Note the instrument’s external markings described under "Safety Symbols".
GROUND THE INSTRUMENT
To minimize shock hazard, the instrument chassis and cover must be connected to an electrical ground. The
instrument must be connected to the ac power mains through a grounded power cable, with the ground wire firmly
connected to an electrical ground (safety ground) at the power outlet. Any interruption of the protective
(grounding) conductor or disconnection of the protective earth terminal will cause a potential shock hazard that
could result in personal injury.
ATTENTION: Un circuit de terre continu est essentiel en vue du fonctionnement sécuritaire de l’appareil.
Ne jamais mettre l'appareil en marche lorsque le conducteur de mise … la terre est d‚branch‚.
FUSES
Only fuses with the required rated current, voltage, and specified type (normal blow, time delay, etc.) should be
used. Do not use repaired fuses or short-circuited fuseholders. To do so could cause a shock or fire hazard.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or fumes.
DO NOT REMOVE THE INSTRUMENT COVER
Operating personnel must not remove instrument covers. Component replacement and internal adjustments must be
made only by qualified service personnel.
DO NOT EXCEED INPUT RATINGS
Operation at line voltages or frequencies in excess of those stated on the line rating label may cause leakage
currents in excess of 5.0 mA peak.
Instruments that a
pp
ear dama
g
ed or de
f
ective should be made ino
p
erative and secured a
g
ainst unintended
o
p
eration until the
y
can be re
p
aired b
y
q
uali
f
ied service
p
ersonnel.

4
SAFETY SYMBOLS
Direct current
Alternating current
Both direct and alternating current
Three-phase alternating current
Earth (ground) terminal
Protective earth (ground) terminal
Frame or chassis terminal
Terminal is at earth potential. Used for measurement and control circuits designed to be
operated with one terminal at earth potential.
Terminal for Neutral conductor on permanently installed equipment
Terminal for Line conductor on permanently installed equipment
On (supply)
Off (supply)
Standby (supply). Units with this symbol are not completely disconnected from ac mains when
this switch is off. To completely disconnect the unit from ac mains, either disconnect the power
cord or have a qualified electrician install an external switch.
In position of a bi-stable push control
Out position of a bi-stable push control
Caution, risk of electric shock
Caution, hot surface
Caution (refer to accompanying documents)
WARNING The WARNING si
g
n denotes a hazard. It calls attention to a
p
rocedure,
p
ractice, or the like,
which, if not correctl
y
p
erformed or adhered to, could result in
p
ersonal in
j
ur
y
. Do not
p
roceed
be
y
ond a WARNING si
g
n until the indicated conditions are full
y
understood and met.
Caution The CAUTION si
g
n denotes a hazard. It calls attention to an o
p
eratin
g
p
rocedure, or the like,
which, if not correctl
y
p
erformed or adhered to, could result in dama
g
e to or destruction of
p
art
or all of the
p
roduct. Do not
p
roceed be
y
ond a CAUTION si
g
n until the indicated conditions
are full
y
understood and met.

5
Declaration Page
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name: Agilent Technologies, Inc.
Manufacturer’s Address: 140 Green Pond Road
Rockaway, New Jersey 07866
U.S.A.
declares that the Product
Product Name: a) AC Power Source/Analyzer
b) Harmonic/Flicker Test System
Model Number(s): a) Agilent 6814A, 6814B, 6834A, 6834B
b) Agilent 6843A
conforms to the following Product Specifications:
Safety: IEC 1010-1:1990+A1(1992) / EN 61010-1:1993
EMC: CISPR 11:1990 / EN 55011:1991 - Group 1 Class A
IEC 801-2:1991 / EN 50082-1:1992 - 4 kV CD, 8 kV AD
IEC 801-3:1984 / EN 50082-1:1992 - 3 V / m
IEC 801-4:1988 / EN 50082-1:1992 - 0.5 kV Signal Lines
1 kV Power Lines
Supplementary Information:
The product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC and carries the CE-marking accordingly.
New Jersey January 1997 __ __
Location Date Bruce Krueger / Quality Manager
European Contact: Your local Agilent Sales and Service Office or Agilent GmbH,
Department TRE, Herrenberger Strasse 130, D-71034 Boeblingen (FAX:[phone])

6
Acoustic Noise Information
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anforderungen der
Maschinenläminformationsverordnung vom 18 Januar 1991.
* Schalldruckpegel Lp <70 dB(A)
* Am Arbeitsplatz
* Normaler Betrieb
* Nach EN 27779 (Typprüfung).
Manufacturer’s Declaration
This statement is provided to comply with the requirements of the German Sound Emission Directive,
from 18 January 1991.
* Sound Pressure Lp <70 dB(A)
* At Operator Position
* Normal Operation
* According to EN 27779 (Type Test).
Printing History
The edition and current revision of this manual are indicated below. Reprints of this manual containing
minor corrections and updates may have the same printing date. Revised editions are identified by a new
printing date. A revised edition incorporates all new or corrected material since the previous printing
date.
Changes to the manual occurring between revisions are covered by change sheets shipped with the
manual. In some cases, the manual change applies only to specific instruments. Instructions provided on
the change sheet will indicate if a particular change applies only to certain instruments.
This document contains proprietary information protected by copyright. All rights are reserved. No part
of this document may be photocopied, reproduced, or translated into another language without the prior
consent of Agilent Technologies. The information contained in this document is subject to change
without notice.
Copyright 1996, 1998 Agilent Technologies, Inc. Edition 1 _________January, 1996
Edition 2 ________December, 1998
Update ________April, 2000

7
Table of Contents
Warranty Information 2
Safety Summary 3
Declaration Page 5
Acoustic Noise Information 6
Printing History 6
Table of Contents 7
1. GENERAL INFORMATION 9
Document Orientation 9
Safety Considerations 10
Options, Accessories, and User Replaceable Parts 10
Description 10
Capabilities 11
Front Panel/Remote Operation 12
Output Characteristic 12
Ranges 12
Output VA Capability 13
2. INSTALLATION 15
Inspection 15
Damage 15
Packaging Material 15
Items Supplied 15
Cleaning 15
Location 16
Bench Operation 16
Rack Mounting 16
Input Connections 16
Input Source and Line Fuse 17
Installing the Power Cord 17
Output Connections 18
Wire Considerations 19
Voltage Drops 19
Remote Sense Connections 20
OVP Considerations 21
Output Rating 21
Trigger Connections 21
Digital Connections 21
Controller Connections 22
GPIB Connector 22
RS-232 Interface 23
3. TURN-ON CHECKOUT 25
Introduction 25
Preliminary Checkout 25
Using the Keypad 26
Checkout Procedure 26
In Case of Trouble 29
Error Messages 29
Line Fuse 29

8
4. FRONT PANEL OPERATION 31
Introduction 31
Front Panel Description 31
System Keys 33
Function Keys 34
Immediate Action Keys 34
Scrolling Keys 35
Meter Display Keys 35
Output Control Keys 36
Protection and Status Control Keys 38
Trigger and List Control Keys 39
Entry Keys 40
Examples of Front Panel Programming 41
1 - Setting the Output Voltage Amplitude 41
Procedure for Three-Phase AC Sources 42
2 - Setting the Output Frequency 43
3 - Setting a Protection Feature 43
4 - Using Transient Voltage Modes 44
5 - Trigger Delays and Phase Synchronization 47
6 - Using Slew Rates to Generate Waveforms 50
7 - Measuring Peak Inrush Current 52
8 - Setting the GPIB Address and RS-232 Parameters 53
9 - Saving and Recalling Operating States 53
10 - Switching Between Single- and Three-phase Operation (Agilent 6834B only) 54
A. SPECIFICATIONS 55
Specifications 55
Supplemental Characteristics 56
B. VERIFICATION AND CALIBRATION 59
Introduction 59
Equipment Required 59
Test Setup 60
Performing the Verification Tests 60
Turn-On Checkout Procedure 60
Voltage Programming and Measurement Accuracy 61
RMS Current Readback Accuracy 61
Performing the Calibration Procedure 62
Front Panel Calibration Menu 63
Front Panel Calibration 63
Enable Calibration Mode 63
Calibrating and Entering Voltage Calibration Values 64
Calibrating and Entering Current Calibration Values 65
Calibrating the Output Impedance (Agilent 6843A only) 66
Saving the Calibration Constants 66
Changing the Calibration Password 66
Calibration Error Messages 67
Calibration Over the GPIB 67
Agilent Calibration Program Listing 67
C. ERROR MESSAGES 71
Error Number List 71
INDEX 75

9
1
General Information
Document Orientation
This manual describes the operation of the Agilent Technologies 6814B/6834B/6843A AC Power
Solutions. These units will be referred to as "ac sources" throughout this manual. Operation of the
Agilent 6843A is described for normal mode operation only. The following documents are shipped with
your ac source:
♦a Quick-Start Guide, to help you quickly get started using the ac source
♦a User’s Guide, containing detailed installation, checkout, and front panelinformation
♦a Programming Guide, containing detailed GPIB programming information
♦a Quick Reference Card, designed as a memory jogger for the experienced user
♦Regulatory Test Solution User’s Guides are shipped with Agilent 6843A units only
You will find information on the following tasks in these guides. Refer to the table of contents of each
guide for a complete list of the topics.
Topic Location
Accessories and options Chapter 1 - this guide
Calibrating the ac source Appendix B - this guide
Front panel keys Chapter 4 - this guide
Front panel programming examples Chapter 4 - this guide
Line voltage connections Chapter 2 - this guide
Line voltage ratings Appendix A - this guide
Operator replaceable parts Chapter 1 - this guide
Operator troubleshooting Chapter 3 - this guide
Operating characteristics Appendix A - this guide
Performance specifications Appendix A - this guide
Quick operating checkout Chapter 3 - this guide
Rack mounting Chapter 2 - this guide
RS-232 operation Chapter 2 - this guide
SCPI programming examples Chapter 3 - Programming Guide
SCPI programming commands Chapter 4 - Programming Guide
Turn-on/checkout Chapter 3 - this guide
Wiring - discrete fault indicator (DFI) Chapter 2 - this guide
- GPIB controller Chapter 2 - this guide
- load or loads Chapter 2 - this guide
- voltage sensing (local and remote) Chapter 2 - this guide
- remote inhibit (RI) Chapter 2 - this guide

1 - General Information
10
Safety Considerations
This ac source is a Safety Class 1 instrument, which means it has a protective earth terminal. That
terminal must be connected to earth ground through a power source equipped with a ground receptacle.
Refer to the Safety Summary page at the beginning of this guide for general safety information. Before
installation or operation, check the ac source and review this guide for safety warnings and instructions.
Safety warnings for specific procedures are located at appropriate places in the guide.
Options, Accessories, and User Replaceable Parts
Table 1-1. Options
Option Description
400 Input power 360-440 Vac, three-phase, 47-63 Hz
1CM 2- Rack mount kit (Agilent 5062-3977)
Support rails (Agilent 5064-0001) are required (rails are not included in rack mount kit).
Table 1-2. Accessories
Item Agilent Part Number
Fuse replacement kits
30AM for 180-235 Vac, 3-phase line
GPIB cables
0.5 meters (1.6 ft)
1.0 meter (3.3 ft)
2.0 meters (6.6 ft)
3.0 meters (13.2 ft)
Heavy duty slide mount kit
5060-3513
10833D
10833A
10833B
10833C
5063-2310
Table 1-3. User Replaceable Parts List
Description Agilent Part No.
Rack mount kit See “Options”
Slide mount kit See “Accessories”
7-terminal sense connector plug 1252-3698
Sense connector cover 4040-2268
4-terminal digital connector plug 1252-1488
AC input safety cover (with strain relief and brushing) 5001-9837
Screw (4), ac input safety cover (6-32 x 1.5in) 2360-0405
Screw (8), ac input barrier block (8-32 x 5/16in) N/A
AC output safety cover 5001-9811
Screw (2), ac output safety cover (6-32 x .3in) 2460-0012
Screw (8), ac output barrier block (10-32 x .37in) N/A
Fuse safety cover 5001-9810
Screw (2), fuse safety cover (6-32 x .3in) 2460-0012
User’s Guide (this manual) 5962-0887
Programming Guide 5962-0889
Quick Start Guide 5962-0883
Quick Reference Card 5962-0885
Appropriate Agilent Regulatory Test Solution Software Agilent 14761A, 14762A, 14763A

General Information - 1
11
Description
The ac source combines three instruments in one unit as shown in the following figure. The function
generator produces waveforms with programmable amplitude, frequency, and shape. The power
amplifier amplifies the function generator signal to produce the ac power for your application. The
measurement functions range from a simple readback of rms voltage and current, to sophisticated
capabilities such as waveform analysis.
Figure 1-1. AC Source Functional Elements
The following model ac power sources are described in this User’s Guide:
Model Description
Agilent 6814B 3000 VA single –phase operation
Agilent 6834B 1500 VA/ phase for three-phase operation
(4500 VA for single-phase operation)
Agilent 6843A 4500 VA single-phase operation
Capabilities
♦Programmable ac voltage, dc voltage, frequency, phase, and current limit.
♦Sine, square, clipped sine, and user-definable waveforms.
♦Voltage and frequency slew control.
♦Synthesized waveform generation for high resolution and accuracy in frequency, low waveform
distortion, and glitch-free phase transitions.
♦Step and pulse output transients for generating surge, sag, dropout, and other line disturbance
simulations.
♦Nonvolatile list programming for generating complex output transients or test sequences.
♦Three-phase/single-phase output capability (Agilent 6834B only)
♦Extensive measurement capability:
•Ac rms, dc, ac+dc voltage and current and peak current.
•Real, reactive, and apparent power.
•Harmonic analysis of voltage and current waveforms gives amplitude, phase, and total
harmonic distortion results up to the 50th harmonic.
•Triggered acquisition of digitized voltage and current with extensive post-acquisition
calculations.
SOURCE
DAC
MEASUREMENT
shunt
POWERMETER
BIPOLAR
AMPLIFIER
WAVEFORM
GENERATOR BLOCK
FFT ANALYZER

1 - General Information
12
•Additional total power and neutral current measurements in the three-phase model.
•All measurements made with 16-bit resolution.
♦Trigger In and Trigger Out for synchronizing transient events or measurements with external
signals.
♦Front panel control with 14-character vacuum fluorescent display, keypad, and rotary pulse
generators for voltage and frequency settings.
♦Built-in GPIB and RS-232 interface programming with SCPI command language.
♦Nonvolatile state and waveform storage and recall.
♦Over-voltage, over-power, over-current, over-temperature,and RI/DFI protection features.
♦Built-in output and sense disconnect relays.
♦Extensive selftest, status reporting, and software calibration.
Front Panel/Remote Operation
The front panel has both rotary (RPG) and keypad controls for setting the output voltage and frequency.
The panel display provides digital readouts of a number of output measurements. Annunciators display
the operating status of the ac source. System keys let you perform system functions such as setting the
GPIB address and recalling operating states. Front panel Function keys access the ac source function
menus. Front panel Entry keys let you select and enter parameter values. Refer to Chapter 4 for a
complete description of the front panel controls.
Remotely programming is accomplished from either the GPIB bus or from an RS-232 serial port. GPIB
and RS-232 programming uses SCPI commands (Standard Commands for Programmable Instruments)
that make the ac source programs compatible with those of other instruments. AC source status registers
permit remote monitoring of a wide variety of ac source operating conditions
NOTE: Refer to the ac source Programming Guide for further information about remotely
programming the ac source. If you are using the Agilent 6843A, refer to the appropriate
Regulatory Test Solution User’s Guide for information about regulatory testing.
Output Characteristic
Ranges
The ac source’s output characteristic is shown in the following figure. The output voltage of the ac
source may be adjusted to any value within the range of the unit. On three-phase units, each phase can be
adjusted independently of the other two.
Rated output VA and conversion efficiency is greatest when the output voltage is set near maximum. For
this reason, the ac source is designed to operate on one of two ranges: 150 volts full-scale, or 300 volts
full-scale. You should choose the range that allows you to operate nearest the full-scale output capability
of the selected range.

General Information - 1
13
Figure 1-2. AC Source Output Characteristic (in real-time mode)
Output VA Capability
The output capability of each output phase is limited by VA (volts-amps) rather than power (watts). The
amount of VA available to a load can be determined by examining figure 1-3, the output power curve.
This curve rates the available VA versus output voltage. Full VA is available only at a full-scale voltage.
Full current is available at voltages between 50% and 100% of the output voltage range. Appendix A
documents the ac source’s specifications and supplemental characteristics.
NOTE: The load on the ac source may draw full VA at any power factor between 0 and 1, and
may draw maximum current with a crest factor of 4 (3 for Agilent 6843A). If the load
draws current in excess of the maximum rated rms or peak current, the voltage amplitude
will be clipped to prevent excessive internal power dissipation.
Figure 1-3. AC Source VA Capabilities
Vrms
Irms
300 V
150 V
5A 10A (6834B 3phase)
10A 20A (6814B)
0
16A 32A (6843A)
See Figure 1-3
15A 30A (6834B 1phase)
0
10
OUTPUT VOLTAGE, PERCENT OF RANGE
OUTPUT VA, PERCENT OF MAXIMUM
20
30
40
50
60
70
80
90
100
70 80 90 10010 20 30 40 50 60

15
2
Installation
Inspection
Damage
When you receive your ac source, inspect it for any obvious damage that may have occurred during
shipment. If there is damage, notify the shipping carrier and the nearest Agilent Sales and Support Office
immediately. The list of Agilent Sales and Support Offices is at the back of this guide. Warranty
information is printed in the front of this guide.
Packaging Material
Until you have checked out the ac source, save the shipping carton and packing materials in case the unit
has to be returned. If you return the ac source for service, attach a tag identifying the model number and
the owner. Also include a brief description of the problem.
Items Supplied
Check that the following items are included with your ac source. Some items are installed in the unit.
Power Cord A power cord appropriate for your location. The cord may or may not be terminated in
a power plug (see "Options" in Chapter 1). If the cord is not included, contact your
nearest Agilent Sales and Support Offices (refer to the list at the back of this guide).
Sense/Digital connector a 4-terminal digital plug that connects to the back of the unit.
a 7-terminal sense plug that connects to the back of the unit.
Safety covers Ac input cover with strain relief
Ac output cover
Fuse cover
Manuals User’s Guide
Programming Guide
Quick Start Guide
Quick Reference Card
Regulatory Test Solutions Guides (supplied with Agilent 6843A units)
Change page If applicable, change sheets may be included with this guide. If there are change sheets,
make the indicated corrections in this guide.
Cleaning
Use a dry cloth or one slightly dampened with water to clean the external case parts. Do not attempt to
clean internally.
WARNING: To prevent electric shock, unplug the unit before cleaning.

2 - Installation
16
Location
Refer to the Safety Summary page at the beginning of this manual for safety-related information about
environmental conditions.
WARNING: Agilent 6814B units weigh 79.5 kg (175 lbs.)
Agilent 6834B/ 6843A units weigh 87.7 kg (193 lbs.)
Obtain adequate help when moving the unit or mounting the unit in the rack.
Bench Operation
The outline diagram in figure 2-1 gives the dimensions of your ac source. The feet may be removed for
rack mounting. Your ac source must be installed in a location that allows sufficient space at the sides and
back of the unit for adequate air circulation. Minimum clearances are 1 inch (25 mm) along the sides. Do
not block the fan exhaust at the rear of the unit.
Rack Mounting
The ac source can be mounted in a standard 19-inch rack panel or cabinet. Rack mounting kits are
available as Option 1CM or 1CP. Installation instructions are included with each rack mounting kit
CAUTION: Agilent 6814B/ 6834B/ 6843A units require instrument support rails for non-stationary
installations. These are normally ordered with the cabinet and are not included with the
rack mounting kits.
Figure 2-1. Outline Diagram
262.6mm
10.3"
12.7mm
0.5"
425.5mm
16.75"
574.7mm
22.6"
266.7mm
10.5"
19.1mm
0.8"
REAR
TOP
SIDE

Installation - 2
17
Input Connections
Input Source and Line Fuse
The ac source requires a 3-phase power service that provides 7350 VA (6000 W) maximum. The power
service should have a current rating greater than or equal to the ac source’s circuit breaker rating. The ac
source has a delta input (no neutral connection) and will accept power from either delta (triangle) or wye
(star) services.
CAUTION:Two input voltage ranges are available (see "AC Input Ratings" in appendix A). The ac
source will be damaged if it is operated at an input voltage that is outside of its
configured input range.
In order to maintain phase current balancing, the power service should be a dedicated line with only
Agilent 6814B/6834B/6843A ac sources drawing current from it. A disconnect box located near the ac
source is recommended for all installations and is mandatory for direct-wired installations.
Installing the Power Cord
WARNING: Installation of the power cord must be done by a qualified and licensed electrician
and must be in accordance with local electrical codes.
The power cords supplied with the ac source do not include a power plug. Terminating connectors and a
ground lug are attached to one end of the cord. See Figure 2-2 while performing the following
procedure.
1. Check the line fuses as follows:
a. Examine the FUSES label on the rear panel.
b. Remove the safety cover in front of the fuse caps.
c. Unscrew the line fuse caps from the rear panel and verify that all fuses are as
specified on the label. Reinstall the fuses.
d. Reinstall the safety cover in front of the fuse caps.
2. Remove the ac input cover from the back of the unit.
3. Open the line clamp on the ac input cover and insert the line cord through the opening.
4. Position the power cord so that the clamp is near the end of the outside insulating sheath
on the power cord. Tighten the screws to secure the clamp.
5. Secure the three ac lines to the ac power strip as follows:
Phase 1 to L1 (black).
Phase 2 to L2 (red).
Phase 3 to L3 (orange).
6. Secure the ground wire (green) to the chassis earth ground terminal.
7. Slip the safety cover over the ac input terminal strip and secure the cover with the four
screws.
8. If required, wire the appropriate power plug to the other end of the power cord. For user-
made cables, strip back the sheath 10 cm (4 in).

2 - Installation
18
Figure 2-2. Connecting the Power Cord
Output Connections
The power output terminal block has a termination for each of the output phases (φ1, φ2, φ3 ) and a
floating neutral line (COM) for the phase return connections. A separate earth ground terminal (⊥) is
located near the output terminals.
Figure 2-3. Output Connections
10cm (4 in.)
LINE RATING
CAUTION
WARNIN G
F 1
L 1
F 2 F 3
L 2 L 3
WARNING
1
2
3
5
6
7
4

Installation - 2
19
NOTE: To minimize the possibility of instability on the output, keep load leads as short as
possible bundle or twist the leads tightly together to minimize inductance
Wire Considerations
Current Ratings
Fire Hazard To satisfy safety requirements, load wires must be large enough not to overheat
when carrying the maximum short-circuit current of the ac source. If there is more
than one load, then any pair of load wires must be capable of safely carrying the
full-rated current of the ac source.
Table 2-1 lists the characteristics of AWG (American Wire Gage) copper wire.
Table 2-1. Ampacity and Resistance of Stranded Copper Conductors
AWG No. Ampacity1Resistance2
(Ω/m) AWG No. Ampacity1Resistance2 (Ω/m)
14 25 0.0103 6 80 0.0016
12 30 0.0065 4 105 0.0010
10 40 0.0041 2 140 0.00064
8 60 0.0025 1/0 195 0.00040
NOTES:
1. Ampacity is based on 30°C ambient temperature with conductor rated at 60°C. For ambient
temperature other than 30°C, multiply the above ampacities by the following constants:
Temp. (°C) Constant Temp. (°C) Temp. (°C)
21-25 1.08 41-45 0.71
26-30 1.00 46-50 0.58
31-35 0.91 51-55 0.41
36-40 0.82
2. Resistance is nominal at 75 °C wire temperature.
Voltage Drops
The load wires must also be large enough to avoid excessive voltage drops due to the impedance of the
wires. In general, if the wires are heavy enough to carry the maximum short circuit current without
overheating, excessive voltage drops will not be a problem. The voltage drops across the load wires
should be limited to less than 2% of the output voltage.
Refer to Table 2-1 if you need to calculate the voltage drop for some commonly used AWG copper wire.

2 - Installation
20
Remote Sense Connections
Under normal operation, the ac source senses the output voltage at the output terminals on the back of the
unit. External sense terminals are available on the back of the unit that allow the output voltages to be
sensed at the load, compensating for impedance losses in the load wiring. As shown in the following
figure:
♦Connect the phase 1 (φ1) through phase 2 (φ) sense terminals to the side of the load that connects
to the corresponding output terminal.
♦Connect the Neutral (COM) sense terminal connector to the neutral side of the load.
♦Twist and shield all signal wires to and from the sense connectors.
The sense leads are part of the ac source’s feedback path and must be kept at a low resistance in order to
maintain optimal performance. Connect the sense leads carefully so that they do not become open-
circuited. If the sense leads are left unconnected or become open during operation, the ac source will
regulate at the output terminals, resulting in a 3% to 5% increase in output over the programmed value.
Set the ALC command to EXT (external) to enable remote sensing. The ALC command is located under
the Voltage key as explained in Chapter 4. Set the ALC command to INT (internal) to disable remote
sensing.
COM φ3 φ2 φ1
φ1 LOAD
φ 2 LOAD
φ 3 LOAD
φ1
φ 2
φ 3
COM
⊥
NOTE: Phase 2 and phase 3 connections are
not available on 6814B/6843A units.
Connector and connections are
rotated 180 degrees for 6843A.
Figure 2-4. Remote Sense Connections