This document is a service manual that describes the components, operation, and maintenance of various transfer switch models ranging from 40 to 1000 amperes. It provides detailed information on the transfer switch components, functional programs, control features, and removal/replacement of electronic control components. The manual is intended to guide service technicians on the operation and servicing of these transfer switches.
CUMMINS ONAN BTPCC TRANSFER SWITCH 150-1000 AMPERES Service Repair Manualyjksmemd
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, draw-out isolation mechanism, automatic transfer switch, electronic control system and optional features. The manual is intended to inform service technicians on the transfer switch applications, models, and procedures for maintenance and repair.
Cummins onan wbtpcd power generation transfer switch 150 1000 amperes service...ufjjsekkemme
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, automatic transfer switch, and electronic control system. The manual explains the functional programs used, including different transition modes and time delays. It also covers optional features like auxiliary relays and load shedding capabilities.
Cummins onan btpch power generation transfer switch 1600 3000 amps service re...fjkfksmemm
This document is a service manual that describes the components and operation of a transfer switch system. It includes sections that describe the various components of the transfer switch, including the cabinet, control panel, switch panel, bypass switch, drawout isolation mechanism, automatic transfer switch, and electronic control system. It also provides information on how to operate the transfer switch in both automatic and manual modes, including bypassing, isolating, and reconnecting the transfer switch. The manual is intended to provide technicians with information to service the transfer switch system.
This document provides an overview and user manual for the MicroLogix 1200 programmable controller. It describes the hardware features and components of the MicroLogix 1200 including the controller, expansion I/O, communication cables, and programming options. The document provides safety and installation instructions including mounting, wiring, communication connections and specifications for the MicroLogix 1200 controller and expansion I/O modules.
This document provides the user manual for MicroLogix 1500 programmable controllers. It contains important safety information and describes the hardware components, installation, wiring, and programming of the MicroLogix 1500 system. The manual instructs users on agency certifications, safety considerations, mounting the controller, installing components, wiring requirements, and using expansion I/O modules. It is intended to guide users through setting up and implementing a MicroLogix 1500 programmable logic controller system.
Cummins onan dskaa generator set with power command 1.1 controller service re...fjkskemuiijdmme
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It provides information on operating the control panel, troubleshooting issues, adjusting control settings, and servicing the generator. The manual contains sections covering the control operation, circuit boards, troubleshooting procedures, control adjustment and service settings, servicing the generator, and wiring diagrams. It is intended to guide service technicians on maintaining and repairing the generator sets.
Cummins onan dqca generator set with power command 3201 controller service re...fjkskemuiijdmme
This document is a service manual that provides information for troubleshooting and maintaining generator sets and their PowerCommand 3201 controllers. It contains sections on control operation, circuit boards and modules, troubleshooting procedures, power transfer control troubleshooting, control adjustment and service procedures, servicing the generator, governors, fuel transfer pumps, and wiring diagrams. The manual provides technical specifications and safety guidelines for working on the generator set components.
Cummins onan btpcg power generation transfer switch 1600 3000 amps service re...fjkfksmemm
This document is a service manual that describes the components and operation of a transfer switch system with ratings between 1600-3000 amps. It includes sections that describe the major components of the transfer switch, including the cabinet, control panel, bypass switch, drawout isolation mechanism, automatic transfer switch, and electronic control system. It also provides information on operating the transfer switch in both automatic and manual modes, bypassing or isolating the switch, and maintaining or servicing the system.
CUMMINS ONAN BTPCC TRANSFER SWITCH 150-1000 AMPERES Service Repair Manualyjksmemd
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, draw-out isolation mechanism, automatic transfer switch, electronic control system and optional features. The manual is intended to inform service technicians on the transfer switch applications, models, and procedures for maintenance and repair.
Cummins onan wbtpcd power generation transfer switch 150 1000 amperes service...ufjjsekkemme
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, automatic transfer switch, and electronic control system. The manual explains the functional programs used, including different transition modes and time delays. It also covers optional features like auxiliary relays and load shedding capabilities.
Cummins onan btpch power generation transfer switch 1600 3000 amps service re...fjkfksmemm
This document is a service manual that describes the components and operation of a transfer switch system. It includes sections that describe the various components of the transfer switch, including the cabinet, control panel, switch panel, bypass switch, drawout isolation mechanism, automatic transfer switch, and electronic control system. It also provides information on how to operate the transfer switch in both automatic and manual modes, including bypassing, isolating, and reconnecting the transfer switch. The manual is intended to provide technicians with information to service the transfer switch system.
This document provides an overview and user manual for the MicroLogix 1200 programmable controller. It describes the hardware features and components of the MicroLogix 1200 including the controller, expansion I/O, communication cables, and programming options. The document provides safety and installation instructions including mounting, wiring, communication connections and specifications for the MicroLogix 1200 controller and expansion I/O modules.
This document provides the user manual for MicroLogix 1500 programmable controllers. It contains important safety information and describes the hardware components, installation, wiring, and programming of the MicroLogix 1500 system. The manual instructs users on agency certifications, safety considerations, mounting the controller, installing components, wiring requirements, and using expansion I/O modules. It is intended to guide users through setting up and implementing a MicroLogix 1500 programmable logic controller system.
Cummins onan dskaa generator set with power command 1.1 controller service re...fjkskemuiijdmme
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It provides information on operating the control panel, troubleshooting issues, adjusting control settings, and servicing the generator. The manual contains sections covering the control operation, circuit boards, troubleshooting procedures, control adjustment and service settings, servicing the generator, and wiring diagrams. It is intended to guide service technicians on maintaining and repairing the generator sets.
Cummins onan dqca generator set with power command 3201 controller service re...fjkskemuiijdmme
This document is a service manual that provides information for troubleshooting and maintaining generator sets and their PowerCommand 3201 controllers. It contains sections on control operation, circuit boards and modules, troubleshooting procedures, power transfer control troubleshooting, control adjustment and service procedures, servicing the generator, governors, fuel transfer pumps, and wiring diagrams. The manual provides technical specifications and safety guidelines for working on the generator set components.
Cummins onan btpcg power generation transfer switch 1600 3000 amps service re...fjkfksmemm
This document is a service manual that describes the components and operation of a transfer switch system with ratings between 1600-3000 amps. It includes sections that describe the major components of the transfer switch, including the cabinet, control panel, bypass switch, drawout isolation mechanism, automatic transfer switch, and electronic control system. It also provides information on operating the transfer switch in both automatic and manual modes, bypassing or isolating the switch, and maintaining or servicing the system.
Cummins onan btpcf power generation transfer switch 1600 3000 amps service re...fjkfksmemm
This document is a service manual that describes the components and operation of a transfer switch system with ratings between 1600-3000 amps. It includes sections that describe the major components of the transfer switch, including the cabinet, control panel, bypass switch, drawout isolation mechanism, automatic transfer switch, and electronic control system. It also provides information on operating the transfer switch in both automatic and manual modes, bypassing or isolating the switch, and maintaining or servicing the system.
Cummins onan wbtpcb power generation transfer switch 150 1000 amperes service...ufjjjskkefkmem
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, automatic transfer switch, and electronic control system. The manual explains the functional programs used, including different transition modes and time delays. It also covers optional features like auxiliary relays and load shedding capabilities.
Cummins onan wbtpcc power generation transfer switch 150 1000 amperes service...ufjjskkksemm
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, automatic transfer switch, and electronic control system. The manual explains the functional programs used, including different transition modes and time delays. It also covers optional features like auxiliary relays and load shedding capabilities.
Cummins onan wbtpcc power generation transfer switch 150 1000 amperes service...fjsjfjskeksmem
This document is a service manual that describes the operation and components of various transfer switch models ranging from 150-1000 amperes. It provides details on the cabinet, control panel, switch panel, bypass switch, automatic transfer switch, and electronic control system. The manual explains the functional programs used, including different transition modes and time delays. It also covers optional features like auxiliary relays and load shedding capabilities.
Cummins onan wbtpcd power generation transfer switch 150 1000 amperes service...fjskeazqkkdmme
This document is a service manual that describes the components and operation of a transfer switch. It includes sections that describe the cabinet, control panel, bar graph meter panel, switch panel, bypass switch, automatic transfer switch, electronic control system, and functional programs. The manual provides information to technicians on how the transfer switch works and its maintenance.
This document is a reference manual for the CPC 100 primary test system for commissioning and maintaining substation equipment. It describes the system's functionality and components, including its software interface. The manual provides safety instructions and explains how to set up and perform tests using the CPC 100 system and software.
Cummins onan dqkc generator set with power command 3201 controller service re...fjsjfjskeksmem
This document is a service manual that provides instructions for operating, calibrating, and servicing generator sets with PowerCommand 3201 controllers. It includes sections on control operation and menus, control calibration and adjustment procedures, servicing the generator, and wiring diagrams. The manual provides technical information and guidance for technicians working on these generator sets.
Cummins onan dghd generator set with power command 2100 controller service re...fjsexswkfkmsem
This document is a service manual that provides instructions for servicing generator sets with PowerCommand 2100 controllers. It contains 10 sections that cover topics such as control operation, circuit boards, troubleshooting, power transfer control troubleshooting, control adjustment and service, servicing the generator, governors, fuel transfer pumps, and wiring diagrams. The manual provides technical information and step-by-step instructions for maintenance and repair of generator set components.
Cummins onan dghe generator set with power command 2100 controller service re...jfjskeksemmmd
This document is a service manual that provides information about generator sets with PowerCommand 2100 controllers. It contains 10 sections that cover topics such as control operation, circuit boards, troubleshooting, power transfer control troubleshooting, control adjustment and service, servicing the generator, governors, fuel transfer pumps, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets.
Cummins onan dggd generator set with power command 2100 controller service re...jfksekfmsme
This document is a service manual that provides information about generator sets with PowerCommand 2100 controllers. It contains 10 sections that cover topics such as control operation, circuit boards, troubleshooting, power transfer control troubleshooting, control adjustment and service, servicing the generator, governors, fuel transfer pumps, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets.
Cummins onan dggd generator set with power command 2100 controller service re...jjfkksmefm
This document is a service manual that provides information about generator sets with PowerCommand 2100 controllers. It contains 10 sections that cover topics such as control operation, circuit boards, troubleshooting, power transfer control troubleshooting, control adjustment and service, servicing the generator, governors, fuel transfer pumps, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets.
Cummins onan dskab generator set with power command 1.1 controller service re...fusjejfjskerekem
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It contains information about safety, system overview, control operation, circuit boards, troubleshooting, control adjustment and service, servicing the generator, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets and controllers.
Cummins onan dskca generator set with power command 1.1 controller service re...fusjejfjskerekem
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It contains information about safety, system overview, control operation, circuit boards, troubleshooting, control adjustment and service, servicing the generator, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets and controllers.
Cummins onan dskaa generator set with power command 1.1 controller service re...fujsjefjskefksemm
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It contains information about safety, system overview, control operation, circuit boards, troubleshooting, control adjustment and service, servicing the generator, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets and controllers.
Cummins onan dskba generator set with power command 1.1 controller service re...fusjejfjskerekem
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It provides information on operating the control panel, troubleshooting issues, adjusting control settings, and servicing the generator. The manual contains sections covering the control operation, circuit boards, troubleshooting procedures, control adjustment and service settings, servicing the generator, and wiring diagrams. It is intended to guide service technicians on maintaining and repairing the generator sets.
Cummins onan dskaa generator set with power command 1.1 controller service re...fujjsjewsfkskekmm
This document is a service manual for generator sets with PowerCommand 1.1 controllers. It contains information about safety, system overview, control operation, circuit boards, troubleshooting, control adjustment and service, servicing the generator, and wiring diagrams. The manual provides technical specifications and instructions for maintenance and repair of the generator sets and controllers.
Cummins onan dskaa generator set with power command 1.1 controller service re...fusjejfjskerekem
This document is a service manual that provides information for troubleshooting and servicing generator sets with PowerCommand 1.1 controllers. It includes sections on control operation, circuit boards, troubleshooting, control adjustment and service, servicing the generator, and wiring diagrams. The manual provides detailed information on reading fault codes, testing components, setting control parameters, and performing maintenance and repairs.
Cummins onan dfej generator set with power command 3201 controller service re...jfksekfmsme
This document is a service manual that provides information about generator sets with PowerCommand 3201 controllers. It contains sections that cover: an introduction which describes the system overview and how to obtain service; control operation which details the control panel functions and menus; circuit boards and modules; troubleshooting procedures; power transfer control troubleshooting; control adjustment and service procedures; servicing the generator; governors; fuel transfer pumps; and wiring diagrams. The manual provides technical information and instructions for servicing and troubleshooting the generator sets and their components.
Cummins onan dfej generator set with power command 3201 controller service re...jjfkksmefm
This document is a service manual that provides information about generator sets with PowerCommand 3201 controllers. It contains sections that cover: an introduction and overview of the system; control operation and menus; circuit boards and modules; troubleshooting procedures; power transfer control troubleshooting; control adjustment and service procedures; servicing the generator; governors; fuel transfer pumps; and wiring diagrams. The manual provides technical specifications and instructions for servicing and repairing generator set components.
Cummins onan dqcb generator set with power command 3201 controller service re...fksefkskemm
This document is a service manual that provides information about generator sets and their PowerCommand 3201 controllers. It contains sections that cover control operation, circuit boards and modules, troubleshooting procedures, power transfer control troubleshooting, control adjustment and service procedures, servicing the generator, governors, fuel transfer pumps and controls, and wiring diagrams. The manual is intended to guide service technicians in maintaining and repairing the generator sets and their components.
New holland tn75 fa tractor service repair manualufjjsjfkememe
This document is a service manual for TN75FA-TN85FA-TN95FA tractors. It contains sections on general guidelines, the engine, clutch, transmissions, and other systems. Each section provides specifications, diagrams, removal and installation instructions, and procedures for inspection and repair. The manual is intended exclusively for use by trained New Holland technicians.
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The document is a service manual that provides information on servicing and repairing various components of CNH Industrial T8 series tractors, including the T8.320, T8.350, T8.380, T8.410, T8.380 SmartTrax, and T8.410 SmartTrax models. It contains sections on the engine, transmission, axles, hydraulics, electrical systems, and other areas. The introductory section provides safety guidelines and identifies the engine as a 6-cylinder, turbocharged and aftercooled Fiat Powertrain Technologies Cursor 9 engine with common rail fuel injection and SCR emissions control.
New holland t8.410 powershift transmission (pst) tractor service repair manualufjjsjfkememe
The document is a service manual that provides information on servicing and repairing various components of CNH Industrial T8 series tractors, including the T8.320, T8.350, T8.380, T8.410, T8.380 SmartTrax, and T8.410 SmartTrax models. It contains sections on the engine, transmission, axles, hydraulics, electrical systems, and other areas. The introductory section provides safety guidelines and identifies the engine as a 6-cylinder, turbocharged and aftercooled Fiat Powertrain Technologies Cursor 9 engine with common rail fuel injection and SCR emissions control.
New holland t8.320 powershift transmission (pst) tractor service repair manualufjjsjfkememe
Plug or cap all ports and lines.
RAIL13TR04235AA 13
14. Remove the two bolts (1) securing the oil cooler to the
engine.
RAIL13TR04236AA 14
47794972 10/11/2014
10.1 [10.001] / 6
Engine - Engine and crankcase
15. Disconnect the wiring harness connectors (1) from the
engine.
RAIL13TR04238AA 15
16. Disconnect the fuel lines (1) from the fuel injection
pump. Plug or cap the lines.
RAIL13TR04239AA 16
17. Remove the two bolts (1) securing the fuel
New holland t5.115 tractor service repair manualufjjsjfkememe
This service manual section provides specifications for the engines used in CNH T5.95, T5.105, and T5.115 tractors, including details about the number of cylinders, displacement, power output, cooling system, lubrication system, and other key engine components. It offers technical information on the F5DFL413C*A003, F5DFL413B*A006, and F5DFL413B*A002 engines across various operating parameters.
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Whitaker Jamieson, Senior Specialist at Forth, gave this presentation at the Forth Addressing The Challenges of Charging at Multi-Family Housing webinar on June 11, 2024.
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9. viii OTPC-1
Safety Precautions
This manual includes the following symbols to indi-
cate potentially dangerous conditions. Read the
manual carefully and know when these conditions
exist. Then take the necessary steps to protect per-
sonnel and the equipment.
DANGER This symbol warns of immediate
hazards that will result in severe personal injury
or death.
WARNING This symbol refers to a hazard or
unsafe practice that can result in severe per-
sonal injury or death.
CAUTION This symbol refers to a hazard or
unsafe practice that can result in personal in-
jury or product or property damage.
ELECTRICAL SHOCK CAN CAUSE
SEVERE PERSONAL INJURY OR DEATH
High voltage in transfer switch components pre-
sents serious shock hazards that can result in se-
vere personal injury or death. Read and follow
these suggestions.
Keep the transfer switch cabinet closed and locked.
Make sure only authorized personnel have the cabi-
net and operational keys.
Due to the serious shock hazard from high voltages
within the cabinet, all service and adjustments to
the transfer switch must be performed only by an
electrician or authorized service representative.
UTILITY-TO-GENSET OR
GENSET-TO-GENSET APPLICATIONS
If the cabinet must be opened for any reason:
1. Move the operation selector switch on the gen-
erator set to Stop.
2. Disconnect the battery charger.
3. Disconnect the starting batteries of the genera-
tor set or sets (remove the ground [−] lead first).
4. Remove AC power to the automatic transfer
switch. If the instructions require otherwise,
use extreme caution due to the danger of
shock hazard.
UTILITY-TO-UTILITY APPLICATIONS
If the cabinet must be opened for any reason, re-
move AC power to the automatic transfer switch. If
the instructions require otherwise, use extreme
caution due to the danger of shock hazard.
GENERAL PRECAUTIONS
Place rubber insulative mats on dry wood platforms
over metal or concrete floors when working on any
electrical equipment. Do not wear damp clothing
(particularly wet shoes) or allow skin surfaces to be
damp when handling any electrical equipment.
Jewelry is a good conductor of electricity and
should be removed when working on the electrical
equipment.
Wear safety glasses whenever servicing the trans-
fer switch and and do not smoke near the batteries.
Do not work on this equipment when mentally or
physically fatigued, or after consuming alcohol or
any drug that makes the operation of equipment un-
safe.
WARNING
INCORRECT SERVICE OR REPLACEMENT OF PARTS CAN RESULT IN
DEATH, SEVERE PERSONAL INJURY, AND/OR EQUIPMENT DAMAGE. SER-
VICE PERSONNEL MUST BE QUALIFIED TO PERFORM ELECTRICAL AND/
OR MECHANICAL SERVICE.
10. 1-1
1. Introduction
ABOUT THIS MANUAL
This manual contains service procedures for an
OTPC automatic transfer switch (ATS). This is an
open transition (OT) transfer switch with Power-
Command® Control (PC). With an open transition
switch there is never a time when both sources are
supplying power to the load.
Refer to the schematic and wiring diagram pack-
age that was shipped with the ATS for specific infor-
mation about its configuration.
Use normal and necessary safety precautions be-
fore starting any service procedure. Identify all haz-
ards by referring to the Safety Precautions and ob-
serve all warnings and cautions within the manual.
Whenever you are troubleshooting, remember that
the generator set, ATS, and utility power source are
all interdependent.
TRANSFER SWITCH APPLICATIONS
Transfer switches are an essential part of a build-
ing’s standby or emergency power system. Power
Source 1 (Normal), commonly the utility line, is
backed up by Power Source 2 (Emergency), often
a generator set. The transfer switch automatically
switches the electrical load from one source to the
other.
The load is connected to the common of the ATS
(Figure 1-1). Under normal conditions, the load is
supplied with power from Source 1 (as illustrated).
If Source 1 is interrupted, the load is transferred to
Source 2. When Source 1 returns, the load is re-
transferred to Source 1. The transfer and retransfer
of the load are the two most basic functions of a
ATS.
LOAD
NORMAL
EMERGENCY
OVERCURRENT
PROTECTIVE
DEVICE
OVERCURRENT
PROTECTIVE
DEVICE
FIGURE 1-1. LOAD TRANSFER SWITCH
(TYPICAL FUNCTION)
Cummins is a registered trademark of Cummins Engine Company.
Onan is a registered trademark of Onan Corporation.
PowerCommand is a registered trademark of Onan Corporation.
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12. 1-2
TRANSFER SWITCH FUNCTION
Automatic transfer switches, capable of automatic
operation without operator intervention, perform
the basic function of transferring the load to the
available source. The controller monitors each
source for allowable voltage and frequency range.
Transfer switches may interact with any of the LON-
WORKSt devices, such as:
• Generator Set
• Master Controller
• Annunciator Panel
• Circuit Breaker
The OTPC ATS supports utility-to-generator, utility-
to-utility, and generator-to-generator applications.
UTILITY-TO-GENSET OPERATION
In utility-to-genset applications, the transfer switch
performs the following functions:
1. Senses the interruption of the Source 1 power.
2. Sends a start signal to the generator set
(Source 2).
3. Transfers the load to the Source 2.
4. Senses the return of Source 1.
5. Retransfers the load to Source 1.
6. Sends a stop signal to the generator set.
UTILITY-TO-UTILITY OPERATION
In utility-to-utility applications, the transfer switch
performs the following functions:
1. Senses the interruption of the Source 1 power.
2. Transfers the load to the Source 2.
3. Senses the return of Source 1.
4. Retransfers the load to Source 1.
If one genset fails to operate within the specified
range of voltage and frequency, the transfer switch
automatically starts and connects the other genset.
Level 2 controllers can control a two-utility configu-
ration for prime power. One utility is designated the
preferred source. The control automatically trans-
fers the load between the two utilities and detects
alarm conditions.
The operator can select either source as the pre-
ferred source (see Figure 1-2). The Preferred
Source menu is included in the Test submenus
(see Figure 4-17). The PC service tool can also be
used to designate either source as the preferred
source.
Note: The exercise routine is not available in this
configuration.
Y Preferred Source
Source 1/Source 2 "
Level 2 Controllers Only
FIGURE 1-2. PREFERRED SOURCE SUBMENU
GENERATOR-TO-GENERATOR
OPERATION
In genset-to-genset applications, there are two
possible configurations, as shown in Figure 1-3.
• Prime Power − Two gensets provide all of
the power (utility power is not available)
• Dual Standby − Two gensets are used to
back up utility power
In Prime Power genset-to-genset applications, the
ATS performs the same as with utility-to-genset ap-
plications.
In Dual Standby genset-to-genset applications, the
master and the slave ATSs perform the following
functions.
1. The slave ATS begins connected to the pre-
ferred source (either genset A or B, but neither
genset is operating yet) and monitors for the
Stand-by Start signal from the master ATS
(see Figure 1-3).
2. When the signal is received, the slave ATS
starts the preferred genset.
3. If the preferred source voltage is acceptable,
the slave ATS remains there and turns off the
non-preferred genset. Otherwise, the slave
ATS will transfer to the non-preferred source.
4. When the utility source returns on the master
ATS, then it will transfer back to the utility and
disables the Stand-by Start signal.
5. When the Stand-by Signal is disabled, the
slave ATS turns off the operating genset (ei-
ther genset A or B).
13. 1-3
Note: The Test/Exercise function and Load Shed
feature are not available in this configuration.
Prime Power (Plant to Plant) Operation
In prime power applications, utility power is not
available. The system includes one transfer switch
and two gensets (see Figure 1-3). One genset is al-
ways running and supplying power to the load while
the other genset is the backup genset. An external
power supply is not needed in this application.
Preferred Source Selection − Under normal op-
eration, one genset is designated as the preferred
source and supplies power to the load. The second
genset is the backup power source. If the preferred
genset fails, the backup genset starts and the
transfer switch transfers the load to the backup
genset.
At any time, the PC service tool or the Test sub-
menu (see Figure 1-2) can be used to designate ei-
ther genset (Source 1 or Source 2) as the preferred
genset. The Preferred Source menu is included in
the Test submenus (see Figure 4-17).
If the user manually changes the preferred source
setting so that the backup genset becomes the pre-
ferred genset, the transfer switch transfers the load
to the new preferred genset when it becomes avail-
able. The unit that is carrying the load is always
considered the preferred source. The control
doesn’t automatically select which source is con-
sidered preferred.
LOAD
GENSET B
GENSET A
OVERCURRENT
PROTECTIVE
DEVICE
OVERCURRENT
PROTECTIVE
DEVICE
LOAD
GENSET B
GENSET A
OVERCURRENT
PROTECTIVE
DEVICE
OVERCURRENT
PROTECTIVE
DEVICE
SLAVE
ATS
UTILITY
MASTER
ATS
OVERCURRENT
PROTECTIVE
DEVICE
STAND-BY START
GEN-TO-GEN CONFIGURATION IN
PRIME POWER MODE
GEN-TO-GEN CONFIGURATION IN
DUAL STANDBY MODE
FIGURE 1-3. GENERATOR-TO-GENERATOR CONFIGURATION IN PRIME POWER
AND DUAL STANDBY MODES
14. 1-4
Automatic Changeover − The transfer switch can
be set up to change the preferred source automati-
cally by enabling the changeover timer. The Time
Delay sub-menus under Setup (see Figure 4-15 or
4-16, depending upon your software version) or the
PC Service tool can be used to enable the change-
over timer and specify a changeover delay time pe-
riod.
The automatic changeover timer automatically
changes the preferred source and transfers the
load to the new preferred genset after a TDEN time
delay. After the transfer is complete, the control ini-
tiates a cool-down period (TDEC) on the old pre-
ferred genset before shutting it down. The old pre-
ferred genset is now the new backup genset. The
changeover timer is now timing for the next
changeover and the cycle continues as long as the
changeover timer is enabled.
CHANGEOVER TIME DELAY
CHANGEOVER ENABLE/DISABLE
Y Changeover Enable
"B Enabled/Disabled
Y Changeover Delay
"B 24 Hours
Level 2 Controllers Only
FIGURE 1-4. CHANGEOVER SUBMENUS
Prime Power Wiring − A permanent start jumper is
installed in the transfer switch and is shipped from
the factory in the prime power mode. Verify that the
jumper (TB3-57 to TB3-59) is installed (see inter-
connect drawing 630−2108, sheet 3 in Chapter 8).
System Startup − To set up a system for prime
power operation:
1. Place the motor disconnect switch in the Off
position, and both generator selector switches
into the OFF position.
2. Place the transfer switch in the Source 1 posi-
tion.
3. Place the Off−Manual−Auto selector switch on
the Source 1 genset control in the Auto posi-
tion. The genset will start and supply power to
the load (the load will be energized and TDE-
Ca may be timing).
4. Use the PC Service tool or the Test sub-menu
to set this genset as the preferred source.
5. Wait for TDECa to finish timing.
6. Place the Off−Manual−Auto selector switch on
the backup genset (Source 2) control in the
Auto position.
7. Place the motor disconnect switch in the Auto
position.
8. If desired, use the Time Delay sub-menus un-
der Setup or use the PC Service tool to enable
the changeover timer and specify a change-
over delay time period.
Testing the System by Turning Off the Pre-
ferred Source:
1. With the preferred source genset running and
supplying power to the load, place the genset
control Off−Manual−Auto selector switch in
the Off position. The backup genset should
start and run.
After the voltage and frequency are at accept-
able levels, the transfer switch should transfer
the load to the backup genset.
2. Place the genset control Off−Manual−Auto se-
lector switch on the preferred genset back in
the Auto position. The preferred genset should
start and run.
After the voltage and frequency levels are at
acceptable levels, the transfer switch should
transfer the load back to the preferred genset.
After the transfer is complete, the control initi-
ates a cool-down period (TDEC) on the back-
up genset and it should stop.
15. 1-5
Testing the System by Changing the Desig-
nated Preferred Source:
1. With the preferred source genset running and
supplying power to the load, use the PC Ser-
vice tool or the Test sub-menu to change the
preferred source. The new preferred source
should start and run.
After the voltage and frequency are at accept-
able levels, the transfer switch should transfer
the load to the new preferred source.
After the transfer is complete, the control initi-
ates a cool-down period (TDEC) on the old
preferred source and it should stop.
2. Use the PC Service tool or the Test sub-menu
to change the preferred source back to the
original genset. The original genset should
start and run.
After the voltage and frequency levels are at
acceptable levels, the transfer switch should
transfer the load back to the original genset.
After the transfer is complete, the control initi-
ates a cool-down period (TDEC) on the back-
up genset and it should stop.
Dual Stand-By Operation
In dual stand-by applications, utility power is avail-
able. The system includes two transfer switches
and two gensets. Utility power supplies power to
the load and both gensets are backup gensets.
Under normal operation, the utility is supplying
power to the load through the lead transfer switch.
The lead transfer switch is a utility-to-genset
switch. The two gensets are connected to the gen-
set-to-genset transfer switch. The load side of this
switch is connected to the genset side of the lead
transfer switch.
Upon loss of utility power to the lead transfer
switch, a signal is sent to the genset-to-genset
transfer switch to start the preferred genset. When
the lead transfer switch senses generator voltage,
it transfers the load to that genset. If the preferred
genset fails to start, a signal is sent to the backup
genset to start. The PC Service tool or the Test sub-
menu on the genset-to-genset transfer switch can
be used to set the preferred source.
If the Stand-By Start is inactive, upon initial power–
up (or reset), or during software initialization, the
transfer switch control will not start either genset.
When a Stand-By Start command is received from
a Master ATS (or other device), the preferred gen-
set immediately starts. If the preferred genset does
not start, a time delay engine start (TDES) is initi-
ated and the control starts the backup genset. The
load is connected to the genset when it becomes
available.
If the preferred genset becomes available while the
backup genset is active, a time delay retransfer
(TDEN) period is initiated and the load is retrans-
ferred back to the preferred genset. A time delay
cool-down (TDEC) period is initiated before turning
off the backup genset. When the Stand-By Start
becomes deactivated, a TDEC period is initiated
and the active generator is turned off.
Preferred Source Selection − Under normal op-
eration, one genset is designated as the preferred
source and the second genset is designated as the
backup power source. If the both the utility power
and the preferred genset fails, the backup genset
starts and the genset-to-genset transfer switch
transfers the load to the backup genset.
At any time, the PC Service tool or the Test sub–
menu on the genset-to-genset transfer switch can
be used to designate either genset (Source 1 or
Source 2) as the preferred genset. If the preferred
genset is changed and the backup genset be-
comes the preferred genset, the transfer switch
transfers the load to the new preferred genset if it is
needed and when it becomes available.
Alternating Preferred Source − In an attempt to
keep the running time equally distributed between
both gensets, the control can be set to alternate be-
tween the gensets when utility power fails. The se-
lected preferred genset starts with the first power
outage. The second power outage starts the back-
up genset, which now becomes the preferred gen-
set. Upon subsequent outages, the preferred gen-
set alternates.
Only utility outages and tests or exercises initiated
at the lead transfer switch result in the gensets be-
ing alternated. The designated preferred genset
will not change if it fails and the backup genset
takes over the load. This alternating preferred
source can only be enabled with the PC Service
tool. When enabled, a genset can be designated
as the preferred source for a maximum of two
weeks. Time adjustments can be made in one-hour
increments.
16. 1-6
Control Voltage − A dual stand-by configuration
requires an external 12−24 VDC power supply to
keep the genset-to-genset control active. An op-
tional Battery Kit is available, or the genset starting
batteries can be used. See drawing 630−2024 for
connection details.
Dual Stand-By Wiring − For dual stand-by ap-
plications, the jumper (TB3-57 to TB3-59) must be
removed (see interconnect drawing 630−2024 in
Chapter 8).
System Startup − To set up a system for dual
stand-by operation:
1. Place the motor disconnect switch on both
transfer switches in the Off position.
2. Connect both transfer switches to the Source 1
side.
3. Make sure the Off−Manual−Auto selector
switch on both gensets is in the Off position.
4. Make sure the genset-to-genset transfer
switch is being powered by an external DC
supply.
5. Press the Lamp Test/Reset button on the gen-
set-to-genset transfer switch. If all of the front
panel lights come on, the control is running
properly.
6. Use the PC Service tool or the Test sub-menu
on the genset-to-genset transfer switch to set
the Source 1 genset as the preferred source.
7. Energize utility power to the lead transfer
switch. The load is energized and a time delay
(TDECa) begins.
8. Wait for TDECa to finish timing.
9. Set the time delay engine start (TDESa) to
zero on the lead transfer switch.
10. Set the time delay engine stop (TDECa) to
zero on the lead transfer switch.
11. If desired, use the PC Service tool to enable
the alternating preferred source.
12. Place the motor disconnect switch in the Auto
position on both transfer switches.
Testing the System by Removing Utility Power
and Turning Off the Preferred Genset:
1. With the utility supplying power to the load and
neither genset running, turn off the utility circuit
breaker feeding the load transfer switch. The
preferred genset should start and run.
After the voltage and frequency are at accept-
able levels, the lead transfer switch should
transfer the load to the preferred genset.
2. Place the Off−Manual−Auto selector of the
preferred genset (running) control in the Off
position.
The preferred genset should stop and the
backup genset should start and run.
After the voltage and frequency are at accept-
able levels, the genset-to-genset transfer
switch should transfer the load to the backup
genset.
3. Place the Off−Manual−Auto selector switch on
the preferred genset back to the Auto position.
The preferred genset should start and run.
After the voltage and frequency are at accept-
able levels, the genset-to-genset transfer
switch should transfer the load to the preferred
genset. The backup genset should stop after
the time delay engine cool-down (TDECa) is
completed.
17. 1-7
CONTROL LEVELS 1 AND 2
Two controls are available. The type of power
source switched and the desired features deter-
mine the control levels available. See the Descrip-
tion section for details. The table lists the applica-
tions that are available with each control.
TABLE 1-1. AVAILABLE CONTROL LEVELS
Power Sources Level 1 Level 2
Genset-to-Utility X X
Genset-to-Genset X
Utility-to-Utility X
The control board level can be viewed, using the
digital display (see Figure 1-5). This menu is in-
cluded in the About submenus (see Figure 4-29 or
4-30, depending upon software version).
Y ATS Board Level
B 2
FIGURE 1-5. CONTROL LEVEL SUBMENU
MODEL IDENTIFICATION
Identify your model by referring to the Model and
Specification number as shown on the nameplate.
Electrical characteristics and application informa-
tion are shown on the lower portion of the name-
plate. The nameplate is located on the cabinet
door.
If it’s necessary to contact a dealer or distributor re-
garding the transfer switch, always give the com-
plete Model, Specification, and Serial number as
listed on the nameplate. This information is neces-
sary to properly identify your unit among the many
types manufactured.
Refer to the next section for a list of feature/option
codes.
The model number is made up of code segments
that designate various features or options:
OTPCA 00000 Spec.A
| | | |
1 2 3 4
1. OTPC - Open Transition PowerCommand®
Control.
2. Ampere Rating:
A = 40, 70, 125
B = 150, 225, 260
C = 300, 400, 600
D = 800, 1000
3. Assigned spec number - issued for each spe-
cific combination of accessories, voltages, fre-
quency and standards codes. This number is
only repeated for standard product.
4. Specification letter - advances with production
modification.
HOW TO OBTAIN SERVICE
When the transfer switch requires servicing, con-
tact your nearest Cummins Power Generation dis-
tributor. Factory-trained Parts and Service repre-
sentatives are ready to handle all your service
needs.
To contact your local CPG distributor in the United
States or Canada, call 1-800-888-6626 (this auto-
mated service utilizes touch-tone phones only). By
selecting Option 1 (press 1), you will be automati-
cally connected to the distributor nearest you.
If you are unable to locate a dealer or distributor,
consult the Yellow Pages. Typically, distributors are
listed under:
Generators-Electric,
Engines-Gasoline or Engines-Diesel, or
Recreational Vehicles-Equipment,
Parts and Service.
For outside North America, call Cummins Power
Generation, 1-763-574-5000, 7:30 AM to 4:00 PM,
Central Standard Time, Monday through Friday.
Or, send a fax to Cummins Power Generation using
the fax number 1-763-574-8087.
When contacting your distributor, always supply
the complete Model Number and Serial Number as
shown on the nameplate.
18. 1-8
FEATURE DESCRIPTION FEATURE
OPTION
Poles:
3 Poles
4 Poles
A028
A029
Application:
Utility to Genset
Utility to Utility
Genset to Genset
A035
A036
A037
Agency Approvals:
UL Listing
NFPA 20
A046
A064
Frequency:
60 Hertz
50 Hertz
A044
A045
Voltage:
120 VAC
190 VAC
208 VAC
220 VAC
240 VAC
380 VAC
416 VAC
440 VAC
480 VAC
600 VAC
R020
R038
R021
R022
R023
R024
R025
R035
R026
R027
Controls:
Level 1 Switch Control
Level 2 Switch Control
C023
C024
Control Options:
Front Panel Security Key
Digital Display
LonWorks Network Com. Module
Load Monitoring
Relay Module
M017
M018
M020
M022
M023
FEATURE DESCRIPTION FEATURE
OPTION
Phase:
1 Phase, 2-W or 3-W
3 Phase, 3-W or 4-W
A041
A042
Meters:
Digital Bar Graph Meters D009
Battery Charges:
2A, 12/24VDC
10A, 12VDC
10A, 24VDC
15 Amp, 12 VDC
12 Amp, 24 VDC
K001
K002
K003
KB59
KB60
Auxiliary Relays:
24 VDC Coil
Emergency Position
Normal Position
Genset Start
12 VDC Coil
Emergency Position
Normal Position
Genset Start
L101
L102
L103
L104
L201
L202
L203
L204
Miscellaneous:
Terminal Block − 30 Position
Load Shed − From Emergency
Terminal Block − Battery Chrg Alarms
Power Connect − Bus Stubs
M003
M007
N002
N009
Cabinet:
Type 1
Type 3R
Type 4
Open Construction
Type 12
Type 4X − Stainless Steel
B001
B002
B003
B004
B010
B025
19. 2-1
2. Component Description
CABINET
The standard cabinet meets the requirements of
the National Electrical Manufacturers Association
(NEMA) for a UL Type 1 cabinet. This type is desig-
nated as a general-purpose, indoor cabinet. Cabi-
nets are available in NEMA types 1, 3R, 4, 4X, and
12.
An examples of a cabinet, showing interior com-
ponents is shown in Figure 2-5.
The front of the cabinet door includes the control
panel, door handle, and the optional key switch.
CONTROL PANEL
The control panel (See Figure 2-1) includes one or
more of the following three panels.
• Bargraph Meter Panel
• Switch Panel
• Digital Display
BAR GRAPH
METER PANEL
(LEVEL 1 NA,
LEVEL 2 OPTIONAL)
SWITCH PANEL
(STANDARD)
DIGITAL DISPLAY
(LEVEL 1 OPTIONAL
LEVEL 2 STANDARD)
OPTIONAL
KEY SWITCH
FIGURE 2-1. CONTROL PANEL ON CABINET DOOR (INCLUDES OPTIONS)