BEHLMAN BL15000 Series Use and care manual

USER'S GUIDE AND
TECHNICAL REFERENCE
AC SOURCE
BEHLMAN MODEL BL15000 SERIES
FOR SERVICE ASSISTANCE
CONTACT BEHLMAN
CUSTOMER SERVICE DEPARTMENT
PHONE TOLL FREE 1-800-874-6727
OR WRITE
BEHLMAN
CUSTOMER SERVICE DEPARTMENT
80 CABOT COURT
HAUPPAUGE, NY 11788
PHONE: [phone]
FAX : [phone]
FOR SALES INFORMATION:
PHONE: [phone]
USA : [phone]
FAX : [phone]
DATE: 10/12 REV. D

WARRANTY CERTIFICATE
Behlman Electronics, Inc. warrants to the original purchaser, for a period of one (1) year from the shipment
from Behlman, each item to be free from defects in material and workmanship. Behlman’s obligation and the
Purchaser’s sole remedy for any breach or violation of this agreement is limited to adjustments, repair or
replacements for parts which have been promptly reported by the Purchaser as having been in its opinion,
defective and so found by Behlman upon inspection. All replacement parts will become the property of
Behlman on an exchange basis. This warranty will not apply if such adjustment repair or parts replacement
is required because accident, neglect, misuse, failure of environmental controls, transportation damage or
causes other than normal use. Batteries are warranted for 30 days from date of purchase.
If during the warranty period a defect should impair the performance of the unit, Behlman agrees, at its
option, to repair or replace the unit or its defective components F.O.B. Behlman at 80 Cabot Court,
Hauppauge NY 11788 or at another Behlman service facility at Behlman’s option. To obtain service under
this warranty, the original Purchase shall notify Behlman at the above address or by telephone at 631-435-
0410 and provide information about the defect or impairment of performance. Behlman with then supply the
Purchaser a Return Material Authorization (RMA) number. This number must be attached to the equipment
sent back for warranty repair. Equipment must be shipped back to Behlman prepaid. No collect shipments
will be accepted.
Behlman shall be excused from supplying warranty service if the unit’s case has been open or if the unit has
been subject to unauthorized repair. All service outside the scope of this warranty shall be paid for by the
Purchaser at Behlman’s rates in effect at the time of this repair. Behlman will not perform any repairs outside
of the warranty without written authorization by the Purchaser. If the repair is a warranty repair, Behlman will
ship the unit back to the Purchaser, by a method determined solely by Behlman, prepaid. If the Purchaser
requests, any other means of transportation it shall be at the Purchaser’s expense.
The use of the equipment shall be under the Purchaser’s exclusive management and control. The Purchaser
will be responsible for assuring the proper installation, use, management and supervision of the equipment.
Behlman will not be liable for personal injury or property damage.
The forgoing warranties are in lieu of all other warranties, expressed or implied including without limitation
warranties of merchantability and fitness for purpose.
In no event shall Behlman be liable for loss of profits, loss of use, or any indirect, consequential or incidental
damages. Purchaser agrees that Behlman will not be liable for any damages caused by the Purchaser’s failure
to fulfill any of the Purchaser’s responsibilities set forth herein.

CLAIM FOR DAMAGE IN SHIPMENT
Under the FOB factory terms of sale, ownership and responsibility are transferred to the
customer when the equipment leaves the factory. Each Behlman equipment is shipped from
the factory in proper operating condition.
Immediately upon receiving equipment, unpack and inspect it for evidence of damage
incurred in shipment. File a claim with the freight carrier if the equipment has been damaged
in any way or it fails to operate properly. Forward a copy of the damage claim report to
Behlman. Include the model number, serial number and date the shipment was received.
Behlman will advise the disposition of the equipment and will arrange for necessary repair
or replacement.
RETURNING EQUIPMENT TO FACTORY
Do not return equipment to the factory without prior authorization from Behlman.
This equipment, like all precision electronic equipment, is susceptible to shipping damage.
It contains heavy magnetic components as well as delicate electronic components.
If equipment is returned without prior authorization, the shipment will be refused, the
customer being liable for all shipping, handling and repair costs.
When packing for reshipment, use the original shock absorbent material and shipping
container to preclude damage to the equipment.
Insure that the return authorization numbers (RMA) is available on the container.

DO NOT USE PEANUTS OR BUBBLE
DO NOT USE UPS
PACKING INSTRUCTIONS
RACK MOUNTED UNITS
1) Box (es) must be double wall with minimum 350 lbs. bursting test.
2) Box (es) must provide for a minimum of 2 to 3 inches of clearance around sides, top and bottom of
unit.
3) When packing unit, utilize either a foam-in-place system or high density foam. Clearance provided
for above must be completely filled with foam.
FAILURE TO COMPLETELY SECURE UNIT IN BOX WILL ALLOW
MOVEMENT DURING SHIPPING, RESULTING IN DAMAGE.
4) Secure box (es) to pallet (s). This is necessary to insure proper handling and protection during
shipping.
5) Place the following warning label on box (es)
DO NOT STACK
6) Ship unit (s) using a freight cargo carrier; air or ground.
CABINET MOUNTED UNITS
Cabinet mounted units require that a special crate be used. The crate should be manufactured of plywood
(3/8" or thicker) and reinforced (using 1 x 3 or larger pine) on all edges. The unit must be firmly secured to
the crates base. The crate must be shock mounted to avoid damage during shipping.
Detail drawings for Behlman's crates are available upon request.

SAFETY SUMMARY
The following safety precautions must be observed during all phases of operation,
service, and operation of this equipment. Failure to comply with these precautions
or with specific warnings elsewhere in the manual violates safety standards
associated with the design and intended use of this equipment.
GROUND THE EQUIPMENT
To minimize shock hazard, the equipment chassis(s) must be connected to an electrical
safety ground. This equipment is supplied with a three conductor line connection for single
phase applications and a five wire connection for three phase applications. Both types
include an earth terminal intended for safety ground connections. In addition, installation
sites may require neutral to earth connections as per NEC section 250 ( National Electrical
Code ). Refer installation to licenced electrician or other qualified personnel.
DO NOT OPERATE IN EXPLOSIVE ATMOSPHERE
Do not operate the equipment in the presence of flammable gases or fumes. Operation of
any electrical instrument in such an environment constitutes a definite safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Operating personnel must not remove equipment covers. Component replacement and
internal adjustments must be made by qualified maintenance personnel. Do not replace
components with power applied. Under certain conditions, dangerous voltage may exist
even with the power removed. To avoid injuries, always disconnect power and discharge
circuits before touching them.
DO NOT SERVICE OR ADJUST ALONE
Do not attempt internal service or adjustment unless another person, capable of rendering
first aid and resuscitation is present .
DO NOT SUBSTITUTE PARTS OR MODIFY INSTRUMENT.
Because of the danger of introducing additional hazards, do not install substitute parts or
perform any unauthorized modification to this equipment. Contact Behlman Electronics for
proper replacement parts and specific service information.
!DANGEROUS PROCEDURE WARNINGS
Warnings will precede potentially dangerous procedures in this manual. Instructions
contained in the warning must be followed.

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Page 1 of 2
TABLE OF CONTENTS
BEHLMAN AC SOURCE, MODEL BL15000 SERIES
SECTION
1 INTRODUCTION
1.1 General Description
1.2 Specifications
2 UNPACKING AND INSTALLATION
2.1 Unpacking
2.2 Installation
3 OPERATION
3.1 Controls and Indicators
3.2 To Operate The Equipment
3.3 Shutdown Procedure
3.4 Remote Analog Control
3.5 External Sync
3.6 Line Drop Comp
3.7 Phase adjustment
3.8 Operational Configuration
4 MAINTENANCE AND ADJUSTMENT
4.1 Maintenance
4.2 Adjustments
4.3 Phase Adjustment
5 THEORY OF OPERATION
5.1 General
5.2 Input Power
5.3 Control Chassis
5.4 Motherboard
5.5 Output Invertor
5.6 Metering
5.7 Miscellaneous

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Page 2 of 2
TABLE OF CONTENTS (cont)
BEHLMAN AC SOURCE, MODEL BL15000 SERIES
SECTION DOCUMENT NUMBER
6. PARTS LIST AND DRAWINGS
FinalAssembly ............................... 106-676-901
ControlChassis(Assembly) ..................... 106-909-002
ControlChassis(Schematic) .................... 106-951-000
Motherboard ( Assembly) ........................ 106-950-000
Motherboard (Schematic Diagram) ................ 106-948-000
OutputFilter(Assembly) ....................... 106-953-002
PhaseControlBoard(Assembly) ................. 106-944-001
PhaseControl(SchematicDiagram) ............... 106-942-000
AssemblyPowerChassis ....................... 106-977-001
PowerChassis(SchematicDiagram) .............. 106-956-001
SoftStartFilterBoard(Assembly) ................. 106-958-001
OutlinePowerChassis ......................... 106-977-500
APPENDIX
B OPTIONAL COMMUNICATION IEEE INTERFACE . . .
C OPTIONAL COMMUNICATION RS-232 INTERFACE .

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BL15K SERIES REV D 10/12
Page 1 of 2
SECTION 1
INTRODUCTION
1.1 GENERAL DESCRIPTION
The Behlman AC Source models (table 1) are sophisticated ac power supplies. Each of the models
provide independent verification of operating voltage, current, and frequency values thereby lessening
the need for external measuring devices. All models provide a single voltage range output.
Any of the models can include all or any combination of the available options if desired (see
OPTIONS listed below table 1).
TABLE 1. BEHLMAN MODELS
MODEL INPUT
VOLTAGE
(ac)
OUTPUT
VOLTAGE
(ac)
BL15000C1 120V/208V 0 - 135V, 3N
BL15000C2 220V/380V 0 - 135V, 3N
BL15000C3 277V/480V 0 - 135V, 3N
BL15000C4 200V )0 - 135V, 3N
BL15000C5 346V/600V 0 - 135V, 3N
BL15000C6 230V/400V 0 - 135V, 3N
OPTIONS: Add E to the dash number for extended frequency range.
Add I to the dash number for Remote GPIB IEEE-488 Interface.
Add IR to dash number for Remote RS-232 interface.
Add L to the dash number for front panel locking controls (VOLTS, FREQ)
Add S10 to the dash number for chassis slides.
Add T15 to the dash number for custom voltage ranges may add additional chassis.
Add T15D to the dash number for dual voltage ranges 0-150/300 add 7.0" chassis.
Add value for V option ( fixed output voltage) example :BL15000C-1-115 = fixed 115V
Add value for F option (fixed frequency) example : BL15000C-1-115/400 = fixed 115 @ 400Hz
Engineering specials will have a four digit suffix added to the model #

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BL15K SERIES REV D 10/12
1.2 SPECIFICATIONS
INPUT POWER
Voltage: See Table 1
Frequency: 47-63 Hz.
OUTPUT POWER
Voltage: See Table 1
Frequency: 45-500 Hz ( setting resolution 1Hz ) or F option fixed @ +/- 1%
Option E: 45 - 1000Hz
Maximum Power: 15000 VA ( 3 phase total )
Maximum Current: 37 amperes per phase for 0-135 V output
16 amperes per phase for Option T15, 300 V output.
Current Crest
Factor: 3:1
Power Factor: 100% of rated output into any power factor load.
Distortion: 1.5% maximum THD (measured at full load, 100 Vac, 50 Hz).
Load Regulation: ±0.7% from no load to full load.
Line Regulation: ±0.1% for ±10% of line change.
Efficiency: 85-90%
Metering: Voltmeter Accuracy: +/-2% of range +/-1 digit (1 volt resolution )
Ammeter accuracy: +/2% of range +/1 digit ( 0.1 amp resolution)
Frequency Meter: +/-2 % of range +/- 1 digit ( 1 Hz resolution)
MECHANICAL
Dimensions: 22.1 in. wide, 28.3 in. high, 31.6 in. deep.
Weight: 425 lbs. ( without options )
Operating
Temperature: 0°C to 55°C (32°F to 131°F).
Safety: Designed and tested to meet the general safety requirements of
IEC-61010-1 . Equipment class 1 , Light Industrial.

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BL15K SERIES REV D 10/12
1.3 SPECIAL UNITS
BEHMAN has produced many special versions of the BL series supplies over the years and will
continue to offer specials to our customers. These specials are usually in the form of customer specified
output voltages, special control functions, or special waveforms ( square wave is one example ). With
this in mind it should be noted some of the information ( including specifications) contained in this
manual may not be applicable to the unit shipped.
All special units will be designated by a four digit “engineering” number following the model number
indicated on the power supply rating tag ( identification label). This number refers to an engineering file
that contains modification instructions and (or) drawings related to the special unit. This information may
or may not be included in this manual. Unless specified by purchase contract, the decision to include
this information in this manual is reserved solely by Behlman .
All special unit manuals will include an addendum that explains the modification and refers to any
special operating considerations required by the modification. Any exceptions to standard unit
specifications will also be addressed by the addendum. When ordering replacement or additional
manuals , make sure to check the ID label on the power supply so that any addendums may be
included.
CE marked units are available and may include additional filtering ( on input line) as well as EMI (Electro
Magnetic Interference) suppressing cable assemblies added to various parts of the units. Units certified
with “CE” mark for electro-magnetic compatibility will have the following additions:
1. Input line filter Behlman P/N 108-115-060
2. Various Ferrite Behlman P/N 110-012-001
Inductors Behlman P/N 110-013-005 & 110-013-019
The Ferrite inductors are added to input and output wiring of the control chassis. The line filter is
added to the input chassis. All other parts and specifications are un-changed.
ALL MANUAL ADDENDUMS WILL FOLLOW THIS PAGE

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BL15K SERIES REV D 10/12
SECTION 2
UNPACKING AND INSTALLATION
2.1 UNPACKING
After unpacking the AC Source (unit), carefully conduct a thorough inspection of controls, indicators and
chassis. If the unit shows signs of damage, do not attempt to operate. File a damage claim with the
carrier responsible. Notify Behlman immediately.
2.2 INSTALLATION
!IMPORTANT
1) This device must be installed and operated by qualified persons only. The content of this
manual must be reviewed prior to use.
2) This unit is assembled in an EIA standard rack cabinet. It consists of a removable control chassis and
integral DC power supply. Connections to the DC supply are factory provided. External connection are
made through an access hole located at the bottom rear of the cabinet. The installation site must
provide proper cooling air circulation. Cool air is drawn in through the rear of the control chassis and
heated air is exhausted out of the lower exhaust fan mounted to the rear door. The cabinet rear door
must be installed and closed during normal operation. Door Locks and keys are provided for safety.
3) Ensure that the line circuit breaker and all other unit controls are in the OFF position before connecting
input power. Use only the lower screws when connecting wires to the control chassis terminal blocks.
Turning or removing the upper screws will loosen internal hardware and will cause damage to the unit.
4) All wiring should enter through the access hole in the bottom rear of the cabinet. Strain relief and
mechanical protection for wiring must be supplied by the end user. Connect 3 phase units as
follows: ( refer to inter-connect diagrams provided on following pages.)
a) INPUT POWER- Connect 47-63 Hz, power lines to the rear panel terminals designated ,
NA, NB, NC, and neutral ( required for all inputs above 240V L-N ) on the INPUT terminal
strip of the power chassis. Re-install all provided safety covers.
b) OUTPUT POWER- Output power lines are connected to designated terminals, NA, NB, NC,
and neutral provided on the control chassis ( or on the output chassis supplied with “T”
option). Refer to figure 2-1. Rei-install all provided safety covers.
c) Interconnection between chassis:
Standard units have hardwired DC connections and are factory connected to the control
chassis.
d) On all units, a chassis mounted stud is provided to connect a protective earth to each metal
chassis. This connection is required to provide operator safety and reduce EMI emissions.
IMPORTANT NOTE:
If this unit is to be installed as part of a permanent power source with wiring distributed in a building the
user is responsible for conformance to local electrical codes. The National Electrical Code
(NEC),section 250 , requires that all separately derived AC power sources ( generators, inverters, etc.)
must have one conductor tied to earth. This is similar to the concept of the neutral conductor in domestic
power distribution systems. This connection may be provided by connecting the input neutral to the
output neutral or connecting the output neutral to the chassis ground (assuming the chassis is tied to
earth). See figure 2-x . Consult local codes and a licenced electrician.

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BL15K SERIES REV D 10/12
NEUT.CBA
HI GND LOW
INPUT
GND
ACCESS HOLE
ACCESS HOLE
SAFETY COVERS REMOVED FOR CLARITY
BL20000 CUSTOMER ACCESS
2.3 3 PHASE INPUT POWER REQUIREMENTS
The total input Volt/Ampere requirement for this equipment is approximately 17500 V/A.. This number
is based on a balanced, purely resistive load applied to the output at 135Vac. The actual input V/A
product is somewhat dependent on the quality and impedance of the input line provided to it. The
BL15000 series power supplies within the model number range C2 to C6 are designed to be used with
a four wire “ Wye” input configurations. Delta configurations above 277 volts require the addition of
back-up fuses for proper safety. The chart below indicates the proper fuse based on the model number
of the power supply.
The following lists should be used to select the proper line fuse size for the model numbers shown. The
selections are based on nominal line voltages and maximum output power. All fuses carry a 600 Vac
rating. DO NOT substitute any other fuse voltage . See warning on following page.
MODEL # L-L VOLTAGE FUSE SIZE PART NUMBER
BL 15000 - C2 380V 30AMP / 600V 108-201-025
BL 15000- C3 480V 30 AMP/ 600V 108-201-025
BL 15000- C5 600 V 25 AMP/ 600V 108-201-024
BL 15000- C6 400V 30 AMP/ 600V 108-201-025
FIGURE 2-1 WIRE ACCESS TOP/BOTTOM VIEW

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BL15K SERIES REV D 10/12
2.3 3 PHASE INPUT POWER REQUIREMENTS ( continued )
! WARNING
SUPPLEMENTAL PROTECTION FOR ALL 277 - 600V DELTA INPUTS.
Units supplied with a Wye or Delta connection higher than 277 ( line to neutral) require back-up fuses
for proper protection. These fuses should be rated at least 600V at a current rating of no more than 30
amps. The fuse interrupt rating is dependant on the installation site capacity. Consultation with an
experienced electrician is recommended. The interrupt rating of the power supply’s front panel breaker
is 10KA @ a maximum of 277Vac.
2.4 UNITS WITH T15 OR T15D OPTIONS
The diagram below illustrates chassis inter-connection for units provided with the T15 or T15D options.
The T15D units are dual range versions of the standard T15 type. As shown below this option includes
an additional internal step-up transformer assembly.
Units supplied with T15 options may vary slightly depending on actual customers requirements. Units
with a or 0 to 300 Vac output are considered standard. Units supplied with other voltages will be
assigned a 4 digit engineering number. T15 units require some special operating considerations. Refer
to section 3 of this manual for operating instructions. Unlike The Behlman T5 - T10 options, T15 unit
are pre-wired at the factory.

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BL15K SERIES REV D 10/12
2.5 Installation Considerations
This device relies on the proper flow of air to provide internal cooling. Failure to provide this will cause
intermittent shut down of the unit due to overheating and will affect the long term reliability. Air is taken
into to the unit through “grills” in the front and side of the unit. A distance of at least 6 inches must be
maintained between the front intake and any obstruction. Likewise, the heated air is exhausted through
grills in the rear panel. A distance of four inches is required between the rear panel and any obstruction
to prevent “back pressure” from severely reducing air flow.
This device is intended for use in a relatively clean environment . For this reason, air filters are not
provided on the intakes. If air filtering is desired, it may be added at the expense of reduced air flow.
This may result in some required de-rating of the output power available from this unit.
An additional “stud” has been included on the rear panel of this device. This point may be used for a
protective earth connection to the chassis. This is also a convenient tie point for a “bonding”
conductor or other chassis grounding arrangement. Refer to figure 2-4 below.
Figure 2-4

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BL15K SERIES REV D 10/12
SECTION 3
OPERATION
! WARNING
This equipment involves the use of voltages and currents that can be hazardous. Only qualified
personnel should be allowed to operate or service it. All covers and doors must always be in place
during operation.
3.1 CONTROLS AND INDICATORS
Table 1 lists the controls and indicators used on the Model BL15000 AC Source. The table also includes their
function. Figure 3-1and 3-2 locate these front panel controls and interconnection terminals.
3.2 TO OPERATE THE EQUIPMENT
1) Ensure that line circuit breaker and OUTPUT switch are set to OFF. Set the VOLTS control fully
counter- clockwise.
2) Connect suitable load across output terminals. (Do not exceed rating of unit.)
3) Set line circuit breaker of power chassis to ON (cooling fan noise should become evident).
4) Set the Meter Select switch to Phase A..
4) Rotate VOLTS control to desired voltage as indicated on the VOLTS display.
5) Rotate the FREQ control to desired frequency as indicated on the FREQ display.
6) Set OUTPUT switch to ON to energize load. The load current is indicated on the AMPS display.
The meter switch may now be set to monitor the other phases.
NOTE
It is also permissible ( and sometimes desirable ) to energize a load
gradually by setting the OUTPUT switch ON and rotating the VOLTS
control from zero to low voltage position up to the voltage desired.
3.3 SHUTDOWN PROCEDURE
1) Set OUTPUT switch to OFF.
2) Rotate VOLTS control completely counter-clockwise.
2) Set line circuit breaker to OFF.
The output switch may be used to switch the load on or off. It controls a relay located in the control
chassis. The useful life of this relay will be affected by high in-rush load currents. To extend relay life,
it is better to switch the output off /on with the voltage set to zero. Extremely high in-rush currents
may activate the unit’s short circuit detection. See section 3 for further details.

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BL15K SERIES REV D 10/12
The table below lists the various controls and indicator associated with this equipment.
Figure 3.1 on the following page illustrates the location of the items listed in the table.
TABLE 3- 1. CONTROLS AND INDICATORS
1CIRCUIT BREAKER Controls application of line power to equipment. ( on main cabinet)
2 VOLTS control Multi-turn control used to set the output voltage.
3FREQcontrol Multi-turn control used to set the output frequency.
4OUTPUTswitch Controls internal power relay to allow on/ off switching of the load
connected to the output terminals.
5 RANGE switch Provided on TD option units only. Used to select output voltage range.
6 PHASE adjust trim Allows adjustment of electrical phase difference between outputs.
Factory set to 120 electrical degrees. Approximate range +/- 45 degrees.
See operating instructions.
7 LINE DROP COMP
adjust
Provides compensation for resistive losses (I/R) in output wiring . One
trimmer for each phase. See operating instructions.
8DIGITAL READOUTS A 3 digit LED readout is provided for : Voltage, Current, & Frequency.
The voltage and current displays indicate the True RMS value.
9METER SELECTOR A 3 position rotary switch selects which phase is currently displayed
on the front panel digital displays.
10a C. CURRENT indicator Illuminates to indicate the power supply is operating in the constant
current protection mode. The output voltage is reduced to limit the
current and maintain a sine wave current into an overload.
10b OVER-TEMP indicator Illuminates to indicate the power source is disabled due to excessive
internal temperature. The power source will recover once the
temperature falls below a safe limit.
10c OVERLOAD LATCH
indicator
Illuminates to indicate the power supply is disabled due to excessive
output current or short circuit. The power supply must be turned off for at
least 30 Seconds to clear this type of fault.
11 AC OUTPUT Provides load connections. 1/4" inside diameter ring lugs recommended.
USE LOWER SCREWS ONLY!
12 REMOTE PRGM 9 pin “D” connector provided for remote analog control inputs .
See operating instruction in section 3.4
13 GND stud Heavy stud for earth connection.
14 DC INPUT Used to connect +/- 250VDC from lower input chassis to control chassis.
Standard units are factory wired.
15 Control Terminals
or
Optional temp sense
Optional Terminal connection. Used for thermal switch on CE type units.
Used for fan and output relay control on T15 units. The temp switch
monitors the input power supply temperature and will shut down the
output relay if overheating should occur.

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BL15K SERIES REV D 10/12
The figure below locates the items listed in table 3-1
Figure 3-1 BL15000 CONTROL CHASSIS

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Figure 3-2 Typical BL 15000 Front and Rear Panel Views

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BL15K SERIES REV D 10/12
3.4. REMOTE PRGM CONNECTOR
!WARNING
The remote control connector ties to points which may become hazardous live under certain fault
conditions. The common of this circuit is directly connected to the power supply common point ( DC
common). Any connection between this device and external equipment should provide isolation to
prevent a potential shock hazard. Connection to ITE equipment ( computer terminals, printers, faxes,
etc. ) requires isolation per IEC or UL/ 60950. This interface is not rated for direct connection to ITE
equipment.
The REMOTE PRGM connector is a nine-pin female “D” connector located on the rear panel. It provides remote analog
control of the power source’s amplitude, frequency, output relay, and voltage range (TD option only). A mating nine
pin male connector is required for connection. It is recommended the user use multi-conductor shielded wire to
fabricate the control cable. Table 3-2 lists the connector pin descriptions and functions. During remote operation, the
unit's front panel VOLTS and FREQ controls must be set fully counter-clockwise
3.4.1 REMOTE AMPLITUDE AND FREQUENCY CONTROL
Two 0-10 Vdc control voltages from externally isolated voltage sources are used to control the unit's amplitude
and frequency via the fabricated remote cable. Note the control inputs are tied to the power circuit common.
This point is not the same as chassis potential unless externally connected ( see wiring info )
TABLE 3- 2. REMOTE PRGM CONNECTOR PIN DESCRIPTIONS
PIN FUNCTION DESCRIPTION
1 External synch HI The power source will lock to the frequency of the signal
applied to this pin. See external sync below.
2 External synch LO Isolated return for sync signal.
3 DC control common* Common return of power source . CAUTION see note 1
4 Amplitude control (hi) 0-10V applied controls output voltage from 1 - 100%. Input
impedance greater than 50K ohms. 300msec response.
5 Frequency control (hi) 0-10V applied controls output frequency from 45 -500 Hz.
Input impedance greater than 20K ohms.
6 Output relay control Application of short to pins 6-7 will activate the output
relay.
7 Output relay control Application of short to pins 6-7 will activate the output
relay.
8 Range relay control Application of short to pins 8-9 will activate the output
relay. This function is provided with TD option only .
9 Range relay control Application of short to pins 8-9 will activate the output
relay. This function is provided with TD option only .
3.5 EXTERNAL SYNC
The unit provides for external synchronization via its rear panel REMOTE PRGM connector. When an external sync
signal is applied to the unit, it reacts to produce an output frequency that is equal to the sync signal regardless of the
FREQ control setting. The external sync can be either TTL compatible or an AC signal from 5 to 30 VRMS. Note that
a square-wave produces the least amount of phase shift between the sync signal and output of the power source.

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BL15K SERIES REV D 10/12
3.5 EXTERNAL SYNC ( continued )
!CAUTION
The external sync signal applied to the unit must not be lower than 45 Hz to avoid possible damage to
the unit. It is also recommended that load be de-energized and the output voltage of the power supply
be set to zero before connecting a sync signal. This will prevent potentially damaging transients from
reaching the load.
3.6 ADJUSTMENT OF LINE DROP COMPENSATION
The line drop compensation trim pots on the power source front panel allows the user to compensate
for resistive loses in the load wiring. One trimmer is provided for each of the three output phases. And
external voltmeter with 0.1V resolution is required to properly set this trimmer. Always use a non-
metallic screwdriver for this adjustment.
1.) With the Unit on and stabilized, note the voltage indication on the front panel meter for phase A . Apply
the desired load and use an external voltmeter (as close to the load as practical) to measure the voltage
supplied to the load terminals A and Neutral.
2.) Using an insulated screwdriver, adjust the front panel “LINE DROP COMP” to bring the load terminal
voltage to the same value as that indicated by the front panel voltmeter. This will compensate for I/R
drops due to the load wiring. Note, Line drop comp will not work without a load applied.
3.) Repeat steps 1 and 2 for the remaining phases.
3.7 PHASE ADJUSTMENT
! CAUTION
MIS-ADJUSTING PHASE ANGLES CAN CAUSE A LARGE IMBALANCE IN DELTA CONNECTED
LOADS AS THE LINE TO LINE VOLTAGE ARE AFFECTED. DO NOT ATTEMPT TO ADJUST
PHASE UNLESS THE IMPACT ON THE LOAD IS UNDERSTOOD.
Two front panel trim controls are provided for phase angle adjustment. To adjust the phase shift
between two phases, proceed as follows: USE NON METALLIC SCREWDRIVER.
1) Connect an external DVM between NA and NB on the output terminal strip.
2) Turn on circuit breaker and output switch and adjust output to 100 VRMS.
3) To produce a phase shift between phase A and phase B, adjust phase difference between NA - NB until
external DVM indicates the Vrms value required to produce the desired phase angle. Use the table below
as a guide. It shows five predetermined values. For in-between phase angles, use the formulas shown.
DVM Phase V = [(1-cos N) 20,000]½
(Vrms) Angle(°) N= cos-1 [1-V2/20,000]
81.3 48 where V = Vrms setting on DVM
100.0 60 and N= phase angle desired
141.4 90
173.2 120
190.2 144
4) Connect DVM across NB and NC and repeat and adjust NB - NC trimmer for the desired phase shift
between phases B & C .