ASEA AC25V User manual

for the ASEA Power Systems
Model AC25V, AC30V, and AC36V II -1 and -3
Single and Three Phase Yacht Power Converters
P/N 607051, Revision A
Issued 1/3/08

AC25V/30V/36VII-1, -3 Operations Manual.... 2
CERTIFICATION
ASEA Power Systems certifies that this product was thoroughly tested and inspected and
found to meet or exceed its published specifications when shipped from the factory.
WARRANTY
ASEA Power Systems warrants each unit to be free from defects in material and
workmanship. For a period of 18 months after purchase or 12 months after installation
(whiche ver is shorter), ASEA Power Systems will repair or replace any defective module
provided the unit has been installed and operated in a manner according to this manual. A
thorough inventory of spare parts & modules is maintained at our factory. Our world wide
sales/support facilities also inventory a complement of spare parts and modules.
ASEA Power Systems is not responsible for consequential damage arising from the use of its
equipment. It does not apply to extensively modified or non-standard systems. Debit memos
for returned units are not accepted, and will cause return of the system without repair.
LIFE SUPPORT POLICY
ASEA Power Systems does not authorize the use of any of its products or systems for use an
AC voltage supply (source) for life support systems. Life support systems are devices which
support or sustain life, and whose failure to perform, when properly used in accordance with
this Operations Manual, can be reasonably expected to result in significant injury to the user.

AC25V/30V/36VII-1, -3 Operations Manual.... 3
1 USING THIS MANUAL
This manual has been written as an Operations Manual. Installation, operations, and
preventative maintenance are covered in detail. This manual will cover the following models:
AC25V-1 25kVA 1 Phase Yacht Power Converter
AC25V-3 25kVA 3 Phase Yacht Power Converter
AC30V-1 30kVA 1 Phase Yacht Power Converter
AC30V-3 30kVA 3 Phase Yacht Power Converter
AC36V II-1 36kVA 1 Phase Yacht Power Converter
AC36V II-3 36kVA 3 Phase Yacht Power Converter
Each converter is capable of being paralleled for higher power applications.
The Model AC25V can be paralleled to produce the following models:
AC50V-1/2 50kVA 1 Phase Yacht Power Converter
AC50V-3/2 50kVA 3 Phase Yacht Power Converter
The Model AC30V can be paralleled to produce the following models:
AC60V-1/2 60kVA 1 Phase Yacht Power Converter
AC60V-3/2 60kVA 3 Phase Yacht Power Converter
The Model AC36V II can be paralleled to produce the following models:
AC75V II-1/2 75kVA 1 Phase Yacht Power Converter
AC75V II-3/2 75kVA 3 Phase Yacht Power Converter
It is import a nt that the operator reads this manual prior to installing and operating the
converter. A thorough understanding of the information covered in this manual is required
for proper installation and operation.
If any questions arise while reading this manual, the user is encouraged to call ASEA Power
Systems. ASEA Power Systems is located at:
ASEA Power Systems
15602 Commerce Lane
Huntington Beach, CA. 92649
Phone [phone]
FAX [phone]
Web: http://www.aseapower.com

AC25V/30V/36VII-1, -3 Operations Manual.... 4
TABLE OF CONTENTS
CERTIFICATION ................................................. 2
WARRANTY .................................................... 2
1 USING THIS MANUAL ...................................... 3
2 SAFETY NOTICES .......................................... 6
3 INTRODUCTION TO THE AC25V, AC30V, AND AC36 V II ....... 8
4 SPECIFICATIONS ......................................... 10
4.1 ELECTRICAL SPECIFICATIONS ...................... 10
4.1.1 Input Service .................................. 10
4.1.2 Output Service ................................. 10
4.1.3 Control, Metering, and Status ..................... 12
4.2 PHYSICAL SPECIFICATIONS ............................... 12
4.2.1 Mechanical ....................................... 12
4.2.2 Environmental ....................................... 12
5 INSTALLATION .......................................... 13
5.1 MECHANICAL INSTALLATION ............................. 14
5.2 ELECTRICAL INSTALLATION .............................. 17
5.2.1 Input Power Connections ......................... 18
5.2.2 Output Power Connections ................................... 19
5.2.3 Seamless Transfer Connections ................................ 20
5.2.4 Multi-Cabinet .............................................. 22
6 OPERATION .............................................. 23
6.1 POWER TURN-ON PROCEDURE ............................ 23
6.1.1 Systems Without Seamless Transfer ...................... 24
6.1.2 Systems With Seamless Transfer ......................... 25
6.2 MULTI-CABINET TURN-ON PROCEDURE .................... 27
6.3 AUTO-RESTART FEATURE .......................... 29
6.4 TURN-OFF PROCEDURE ................................... 31
6.4.1 Systems Without Seamless Transfer ...................... 31
6.4.2 Systems With Seamless Transfer ................... 32
6.5 REMOTE COMMUNICATION ............................... 33
7 SOFTWARE FEATURES .................................... 38
7.1 GENERAL .......................................... 38
7.2 GENERAL .......................................... 38
7.3 LOAD MANAGEMENT OPERATION ................... 40
7.3.1 Shore Cord Alarm .............................. 40

AC25V/30V/36VII-1, -3 Operations Manual.... 5
7.3.2 Shore Cord Setup ............................... 41
7.3.3 Load Sharing .................................. 42
7.3.4 Voltage Droop ................................. 44
7.3.5 Automatic Transfer To Generator .................. 45
7.3.6 Quick Setup Of Shore Cord Alarm ................. 46
7.3.7 Expert Load Sharing Use ......................... 47
7.4 GENERATOR FREQUENCY ANALYSIS ................ 48
7.5 CONVERTER OUTPUT IMPEDANCE CONTROL ......... 48
7.6 AGC CONTROL ..................................... 49
7.7 kW-HOUR METER AND MAX POWER LEVEL DISPLAY . 50
7.8 CONVERTER OUTPUT VOLTAGE CONTROL ........... 51
7.9 EVENT LOG ........................................ 52
7.10 DIAGNOSTICS ...................................... 54
7.11 CALIBRATION ..................................... 57
8 MAINTENANCE .......................................... 60
9 INTERNATIONAL POWER FORM REFERENCE ............... 61
FIGURES
1 SYSTEM BLOCK DIAGRAM ................................. 8
2 MECHANICAL OUTLINE AND CONTROLS ................... 15
3 MOUNTING PATTERN ..................................... 16
4 INPUT AND OUTPUT CONNECTIONS ....................... 18
5 SEAMLESS TRANSFER PCB CONNECTIONS ................. 21
6 CONTROL CIRCUITS (PCBs) ................................ 22
7 FRONT PANEL CONTROLS ................................. 23
8 RS-232C PINOUT .......................................... 33
9 STATUS WORD BIT DEFINITIONS .......................... 56

AC25V/30V/36VII-1, -3 Operations Manual.... 6
2 SAFETY NOTICES
Each shore power converter is capable of transferring very large amounts of electrical
en ergy very quickly. This quality is fundamental to a high performance power
converter. International symbols are used throughout this manual to stress important
information. Read the text below each symbol carefully and use professional skills
and prudent care when performing the actions described by the text.
THE CAUTION SYMBOL (TRIANGLE ENCLOSING AN EXCLAMATION
POINT) INDICATES A CONDITION THAT COULD SERIOUSLY DAMAGE
EQUIPMENT AND POSSIBLY INJURE PERSONNEL. CAUTIONS WILL
BE PRESENTED IN THIS FORM. ALL CAUTIONS SHOULD BE
RIGOROUSLY OBSERVED.
THE WARNING SYMBOL (TRIANGLE WITH A LIGHTNING BOLT) IS
USED TO SIGNAL THE PRESENCE OF A POSSIBLE SERIOUS, LIFE
THREATENING COND ITION. A CONDITION THAT IS HAZARDOUS
TO BOTH PERSONNEL AND EQUIPMENT WILL BE ISSUED AS A
WARNING. ALL WARNINGS WILL BE PRESENTED IN THIS FORM.

AC25V/30V/36VII-1, -3 Operations Manual.... 7
THIS EQUIPMENT CONTAINS HIGH ENERGY, LOW IMPEDANCE
CIRCUITS! LETHAL POTENTIALS ARE CONTAINED WITHIN
THE SYSTEM EVEN WHEN IT IS APPARENTL Y NOT
OPERATING.
C ARE MUST BE EXERCISED WHEN SERVICING T HIS
EQUIPMENT IN ORD ER TO PREVENT SERIOUS OPERATOR
INJURY OR EQUIPMENT DAMAGE.
DO NOT WORK ON OR OPERATE THIS EQUIPMENT UNLESS
YOU ARE FULLY QUALIFIED TODO SO. NEVER WORK ALONE.
THE EQUIPMENT IS NOT IGNITION RATED, IT MUST NOT BE
OPERATED IN AREAS WHERE COMBUS TIBLE GASES MAY
ACCUMULATE.
OBSERVE THE FOLLOWING WHEN SERVICE AND
MAINTENANCE ARE REQUIRED:
REMOVE ALL JEWELRY FROM ARMS AND NECK WHEN SERVICING
THIS EQUIPMENT. THIS PREVENTS THE POSSIBILITY OF
SHORTING THROUGH THE JEWELRY, OR ELECTROCUTION OF THE
OPERATOR.
WEAR SAFETY GLASSES WHEN SERVICING THIS EQUIPMENT
TO PREVENT EYE INJURY DUE TO FLYING PAR TICLES
CAUSED BY ACCIDENTAL SHORT CIRCUIT CONDITIONS .
DO NOT REMOVE ANY PANELS OR COVERS WITHOUT FIRST
OPENING ALL CIRCUIT BREAKERS AND THEN REMOVING
THE INPUT SERVICE.
SERVICE OTHE R THAN CLEANING AIR FILTER ELEMENTS
S HOULD BE REFERRED TO PERSONNEL AUTHORIZED BY
THE FACTORY TO SERVICE THIS EQUIPMENT.

AC25V/30V/36VII-1, -3 Operations Manual.... 8
METER AND CONTROL
DC LINK
SHORE
POWER
ISOLATION
TRANSFORMERS
POWER
SUPPLY
(PFC)
AC/DC
SWITCH
15A FUSES
DISCONNECT
LOW VOLTAGE
POWER SUPPLY
POWER
CONTROL
OUTPUT
DC/AC
INVERTER NOISE FILTERS
SHIPS
POWER
CONTROL
AND DISPLAY
CIRCUITS
KEYPAD 4x40 LCD DISPLAY
SERIAL INTERFACE (RS232C)
DC LINK
POWER
SUPPLY
(PFC)
AC/DC DC/AC
INVERTER NOISE FILTERS
POWER MODULE #1
POWER MODULE #2
DC LINK
SUPPLY
POWER
(PFC)
AC/DC
INVERTER
DC/AC FILTERS NOISE
POWER MODULE #3
INPUT POWER
FORM CONTROL
CIRCUITS
GENERATOR VOLTAGE SENSE
INPUT
CONTROL
POWER
GENERATOR CONTACTOR CONFIRM
GENERATOR MATCH COMMAND
GENERATOR CONTACTOR CONTROL
SEAMLESS
TRANSFER
ONLY
FIGURE 1 SYSTEM BLOCK DIAGRAM
3 INTRODUCTION TO THE AC25V, AC30V, AND AC36V II
Each model is a high performance Yacht Power Converter utilizing dual-conversion technology. The
systems will accept any single or three phase input service with a frequency between 40-70Hertz,
and a voltage between 170-520VAC. Input service may consist of one single phase or one three
phase shore voltage; the converter will auto-configure for the applied power form.
The output power form has been programmed at the factory for the power form (single or three
phase), voltage and frequency, required by your yacht.
Dual-conversion technology is the preferred technique for AC power conversion, and was chosen
for each system. In this technology, the shore power service is isolated by transformers, then
converted to DC power by the Power Factor Correction (PFC) power supplies. The output inverters
then convert the DC power back to the required AC form (both voltage and frequency) required by
the yacht.

AC25V/30V/36VII-1, -3 Operations Manual.... 9
Being a unit designed from the ground up specifically for the yachting industry, all efforts have been
made to produce a system capable of withstanding the marine environment. All system components
are packaged in one drip-proof, dust-resistant stainless steel enclosure. Major components are
internally modular, allowing a simple exchange in the unlikely event of failure. Complete
maintenance and service can be provided with only top and front access to the system. Three
lightweight power modules can be removed and replaced through the front panel for repair or power
level upgrade.
System operation is managed through three basic operators. A safety disconnect on the front of the
enclosu re is used for securing input service during maintenance and service. Three membrane
switch groups in the control console, SHORE POWER, CONVERTER POWER, and SHIP’S
POWER, provid e normal operation of the system. Each switch group contains an ON and OFF
switch with associated LED indicators.
In addition to the basic function of power conversion, each system provides the user with a
sophisticated power analysis and monitoring capacity. All parameters for input and output power,
along with operations and status information, are availabl e on the front panel display console.
Various displays are selected through a long life, sealed membrane switch panel.
For additional information on controls and indicators, please refer to Section 6.

AC25V/30V/36VII-1, -3 Operations Manual....10
4 SPECIFICATIONS
4.1 ELECTRICAL SPECIFICATIONS
Parameter AC25V-1, -3 AC30V-1, -3 AC36V II-1, -3
4.1.1 Input Service
Input Power Form Single or Three Phase Single or Three Phase Single or Three Phase
Input Voltage Range 170-520 V
AC
170-520 V
AC
170-520 V
AC
Input Frequency Range 40-70 Hertz 40-70 Hertz 40-70 Hertz
Input Current, Max. Single Phase 105 A
RMS
125 A
RMS
150 A
RMS
or, Max. Three Phase 70 A
RMS
83 A
RMS
100 A
RMS
Input Current, Soft Start, Max. 20 A
RMS
20 A
RMS
20 A
RMS
Input Current Distortion <5% THD @ rated load <5% THD @ rated load <5% THD @ rated load
Input Power Factor >0.99 @ rated load >0.99 @ rated load >0.99 @ rated load
4.1.2 Output Service
Output Power Rating 25kVA @ 0.85 p.f. 30kVA @ 0.85 p.f. 36kVA @ 0.85 p.f.
Output Power Form Single Phase 220 or 230 V
RMS
, Split Phase 120/240 V
RMS
or, Three Phase 120/208, 127/220, 220/380, 230/400, or 240/416
*Note: Minor variations in the above voltage levels can be accommodated, contact factory
for additional information .
Output Frequency 50 or 60 Hertz 50 or 60 Hertz 50 or 60 Hertz
Output Frequency Accuracy 0.01% 0.01% 0.01%
Output Voltage Distortion < 1% THD < 1% THD < 1% THD
Output Voltage Line Regulation 0.50% 0.50% 0.50%
Output Voltage Load Regulation 1.0% 1.0% 1.0%
Output Voltage Response Time 0.20 msec. 0.20 msec. 0.20 msec.
Output Current, Continuous Refer to Table 1 on the following page for basic ratings.
Output Current, Peak 400% of cont. rating 400% of cont. rating 350% of cont. rating
Output Current, Surge 250% of cont. rating 250% of cont. rating 200% of cont. rating
Conversion Efficiency 91% @ rated load 91% @ rated load 91% @ rated load

AC25V/30V/36VII-1, -3 Operations Manual....11
4 SPECIFICATIONS
4.1 ELECTRICAL SPECIFICATIONS , cont.
4.1.2 Output Service, cont.
Table 1 - Output Current, Rated Continuous RMS
Output Form AC25V-1 AC30V-1 AC36V II-1
1Ø , 220V
RMS
114A
RMS
/Ø 136A
RMS
/Ø 164A
RMS
/Ø
1Ø , 230V
RMS
109A
RMS
/Ø 130A
RMS
/Ø 157A
RMS
/Ø
1Ø , 240V
RMS
104A
RMS
/Ø 125A
RMS
/Ø 150A
RMS
/Ø
1Ø, 120/240V
RMS
104A
RMS
/Ø 125A
RMS
/Ø 150A
RMS
/Ø
Output Form AC25V-3 AC30V-3 AC36V II-3
3Ø, 120/208V
RMS
70A
RMS
/Ø 83A
RMS
/Ø 100A
RMS
/Ø
3Ø, 127/220V
RMS
66A
RMS
/Ø 79A
RMS
/Ø 94A
RMS
/Ø
3Ø, 220/380V
RMS
38A
RMS
/Ø 45A
RMS
/Ø 55A
RMS
/Ø
3Ø, 230/400V
RMS
36A
RMS
/Ø 43A
RMS
/Ø 52A
RMS
/Ø
3Ø, 240/416V
RMS
35A
RMS
/Ø 42A
RMS
/Ø 50A
RMS
/Ø

AC25V/30V/36VII-1, -3 Operations Manual....12
4 SPECIFICATIONS, cont.
4.1 ELECTRICAL SPECIFICATIONS, cont.
4.1.3 Control, Metering, and Status
Shore Power Control Input Service Disconnect Switch, 2 pos.
Membrane Switch, Input ON/OFF Control
Ship’s Power Control Membrane Switch, Output ON/OFF Control,
Generator/Shore Power Transfer Control
Shore Power Metering Voltage, Current, Frequency, kVA, kW, %Load
Converter Power Metering Voltage, Current, Frequency, kVA, kW, %Load
System Power Metering (opt.) Voltage, Current, Frequency, kVA, kW, %Load
Generator Power Metering Generator 1 & 2, Voltage, Frequency
System Status Operational status, Diagnostics, Software Calibration
4.2 PHYSICAL SPECIFICATIONS
Parameter AC25V-1, -3 AC30V-1, -3 AC36V II-1, -3
4.2.1 Mechanical
Height * 63.81"/162cm 63.81"/162cm 63.91"/162cm
Width, Enclosure 18.00"/45.72cm 18.00"/45.72cm 18.00"/45.72cm
Depth 21.00"/53.3cm 21.00"/53.3cm 21.00"/53.3cm
Weight 575lbs/261kg 590lbs/268kg 625lbs/284kg
* Final height when exhaust box is installed.
4.2.2 Environmental
Ambient Temperature Range 0-50°C non-condensing
Air Exchange Rate 800 CFM

AC25V/30V/36VII-1, -3 Operations Manual....13
5 INSTALLATION
The installation section is divided into two parts. The first will cover mechanical installation, the
second, electrical installation.
Read this manual thoroughly prior to attempting the installation. Improper installation is the most
significant cause of system start- up problems and service issues over the product’s life. Upon
receipt of the equipment, perform an external visual inspection. Verify that nameplate information
is consistent with the ship’s power requirements (required form, voltage, and frequency).
Proper planning will speed up installation, location, and connection of the equipment. Follow the
suggested minimum clearances provided in Table 2.
Ensure the room/compartment has adequate vent ilation and cooling. The thermal load
presented by AC25V will be approximately 7,255BTU/Hr at maximum continuous load,
8,705BTU/Hr for the AC30V, and 10,333BTU/Hr for the AC36V II.
THE CONVERTERS ARE HEAVY, WEIGHING UP TO 625lbs DEPENDING
UPON MODEL AND INSTALLED OPTIONS. EXTREME CAUTION MUST
BE EXERCISED IN HANDLING AND INSTALLATION TO AVOID
EQUIPMENT DAMAGE OR INJURY TO PERSONNEL. AN ADEQUATE
MATERIAL HANDLING DEVICE SHOULD BE USED FOR UNLOADING,
MOVING, AND POSITIONING THE SYSTEM.

AC25V/30V/36VII-1, -3 Operations Manual....14
5.1 MECHANICAL INSTALLATION
The systems were designed for deck mount installations and as such are provided with six mounting
holes, three per si de. Mounting holes have been provided with ½" (12.7mm) diameters; stainless
steel hardware in the range of 3/8" to 7/16" (10-11mm) diameter is required.
The mounting surface should be flat and dimensionally stable to within 1/16" (1.5mm) to prevent
torsional stresses being applied to the structure of the converter. Spacers (shim stock) may be added
between the mounting surface and the converter mounting flanges to adjust the mounting plane. If
th e system is to be mounted in a high vibration/shock environment, then the factory must be
consulted concerning the application. Drawings for approved shock mounting assemblies will be
supplied.
The following recommended cleara nces must be considered during installation for proper operation:
TABLE 2
FOR PROPER:
Operation Service
Front 3" 24" min
Lower Rear Sides 4" (Intake Airflow) 0"
Top 7" (Exhaust Airflow) 0"
Rear 3" (Intake Airflow) 0"
Air intake grillwork is provided on the bottom, rear, and lower side panels of the equipment. A total
intake area of 250 in
2
must be pro vided through a combination of surfaces, excluding that area
provided by the bottom. Please contact factory engineers for review of the installation plan if unsure
on any specification or requirement.
Complete installation drawing, both electrical and mechanical, will be supplied upon request.

AC25V/30V/36VII-1, -3 Operations Manual....15
5 INSTALLATION, cont.
5.1 MECHANICAL INSTALLATION, cont.
OFF
ON
POWER
CONV
F 5
C A L I B R A T E
C O N V E R T E R
POWER
SHORE
F1
POWER
G E N E R A T O R
F 2
STATUS
SYSTEM
P O W E R
F3 F4
ON
OFF OFF
ON
SHORE
P O W E R
C O N V E R T E R
P O W E R
GEN
SHIP'S
FIGURE 2 MECHANICAL OUTLINE AND CONTROLS

AC25V/30V/36VII-1, -3 Operations Manual....16
FIGURE 3 MOUNTING PATTERN

AC25V/30V/36VII-1, -3 Operations Manual....17
5.2 ELECTRICAL INSTALLATION
This procedure assumes the physical installation of the converter has been completed. It is the users
responsibility to provide input se rvice over-current protection and disconnect means. Follow the
table below for shore power wiring. Maximum Currents Under
Low-Line Conditions
Model AC25V AC30V AC36V II
Input Current Single Phase, 170-290V 155A 155A 190A
Single Phase, 330-520V 78A 78A 95A
Three Phase, 170-290V 89A 89A 110A
Three Phase, 330-520V 45A 45A 55A
Output Current Refer to Table 1, page 11
All power wiring requires the removal of the front panel, the interior safety cover, and the power
cable acces s cover (cabinet bottom). This cover is secured with 6 ea 1/4-20" x ½" stainless steel
screws. Drill or punch the appropriate holes for the selected strain reliefs. Re-install the input
service panel using the removed hardware. Place the disconnect switch in the OFF position.
INPUT WIRING MUST BE PERFORMED BY A QUALIFIED ELECTRICIAN
FAMILIAR WITH STANDARD SAFEGUARDS AND PROCEDURES REQUIRED
BY THE INSTALLATION OF THIS TYPE OF EQUIPMENT. POWER MUST BE
REMOVED FROM THE INPUT DIST RIBUTION SYSTEMS SUPPLYING
POWER TO THE AC25V PRIOR TO THE START OF THE FOLLOWING STEPS.
INPUT POWER MUST BE SECURED (LOCKED) IN THE OFF (DE-ENERGIZED)
STATE UNTIL INSTRUCTED OTHERWISE BY THIS DOCUMENT. FAILURE
TO FOLLOW THESE PROCEDURES CAN RESULT IN DAMAGE TO THE
EQUIPMENT, AND CAN PRESENT THE RISK OF INJURY OR DEATH TO THE
INSTALLER OR THE OPERATOR.

AC25V/30V/36VII-1, -3 Operations Manual....18
5.2.1 Input Power Connections
The converter is supplied with compression type terminal blocks for in put power connections.
These terminal blocks accept wires in the range of 1/0 to 8AWG. Refer to the applicable standards
for selection of required wire gauge and type.
If single phase shore power is to be used, it must be applied between the SHORE POWER AØ and
BØ terminal blocks. In two cabinet systems, one shore cord is connected to each converter shore
power terminal block.
SHORE POWER INPUT
ØA ØB ØC N
CONV. POWER OUTPUT
ØA ØB ØC
FIGURE 4 INPUT AND OUTPUT CONNECTIONS

AC25V/30V/36VII-1, -3 Operations Manual....19
5.2.2 Output Power Connections
Each system is supplied with compression type terminal blocks for output power connections. These
terminal blocks acc ept wires in the range of 1/0 to 8AWG. Refer to the applicable standard for
selection of the required wire gauge and type. Please refer to the FIGURE 4 on the previous page
for additional detail.
THE CONVERTER ISOLATES THE OUTPUT POWER FROM THE INPUT
POWER AND EQUIPMENT (SAFETY) GROUNDS SIMILAR TO AN
ISOLATION TRANSFORMER. THE INSTALLER MUST RE-ESTABLISH
THE GROUND REFERENCE FOR THE EQUIPMENT AT TIME OF
INSTALLATION. NEUTRAL AND EQUIPMENT (SAFETY) GROUNDS TO
BE CONNECTED PER ABYC STANDARDS.
Single phase configuration systems ignore the Phase C output terminal. Split phase systems use the
Phase A, Neutral, and Phase B terminals. Single phase systems connect between the Phase A and
Phase B terminals.
Replace the power cable access cover and front panel using the removed hardware.
Multi-cabinet systems connect outputs at the switchgear panel. It is recommended to connect to the
distribution bus through a manually operated disconnect device such as a molded case switch or
circuit breaker for ease and safety of service in the event of converter failure. The internal power
contactors manage power control to the distributi on bus, applying power through keypad, Auto-
restart, and remote control.

AC25V/30V/36VII-1, -3 Operations Manual....20
5.2.3 Seamless Transfer Connections
If the Seamless Transfer Option was ordered with the system, connections must be made between
the generator and the converter. These connections are used by the converter to successfully manage
the seamless transfer operation and are comprised of control, signal, and feedback functions. These
connections are only required on the Master cabinet of a multi-cabinet installation. The use of 14-
18AWG wire is recommended for signal and control wiring.
Figure 5 on page 21 depicts the power and signal connections for a typica l installation. A single
generator’s wiring is shown for clarity. Contact the factory for complete and specific system
wiring drawings. These can be supplied in either printed or electronic format .
A motorized circuit breaker is used for generator transfer in the example, with line voltage operated
actuator coils. Both momentary and continuous controls are supported by the converter, and can be
selected through software control depending upon the installation. The default control pulse width
for momentary type co ntrol systems is 0.6 seconds for both the open and close commands. If a
power contactor is use d for generator power control, the connections to the GEN_CB_OPEN
terminals (TB10-1, 2, 3) can be omitted. The contacts used for generator control are rated for a
maximum of 8A @250VAC or 5A @ 24VDC. The generator circuit breaker or contactor must be
equipped with an auxiliary switch contact set, closed when the main contacts are closed.
The generator voltage sense wires are used by the system to match the converter to the generator’s
voltage and phase, and should be fused at the generator.
Generator transfer is selected by the generator metering display, whichever generator is displayed
in the activ e window will be deemed the master generator for synchronization. During transfers
from generator to converter, the GEN_CB_OPEN command will be issued to both generator circuit
breakers when the converter is placed on-line.