Emerson Asco 336 Series Paralleling System Brochures And Data Sheets
2015-03-30
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Redefining Paralleling Systems.
Since introducing the rst power transfer switch in 1920,
ASCO has been committed to providing reliable technology,
superior support and dedicated eld service to satisfy power
switching and controls requirements for critical operations.
Throughout the more than 90 years of power transfer tech-
nology development, ASCO has introduced every signicant
product innovation in the industry.
That leadership and commitment to innovation continues
with the 336 Paralleling System. Incorporating eld-proven,
reliable technology in a patented dual operator transfer
switch mechanism, the 336 Paralleling System meets the
needs of design build projects: cost effective, reliability,
and quick delivery.
The 336 Paralleling System, available from 208 to 600
Volts, is the rst transfer switch-based paralleling system
on the market. It combines robust UL approved components
in a standardized design that brings added exibility,
reliability, and cost savings to any project.
A Superior Choice
Feature Benefit
Revolutionary CTTS-based design High reliability and endurance
Utilizes generator power for switching Eliminates costly and maintenance-prone, lead-acid batteries
Exclusive load management feature Maximum protection of priority one loads
Handles all generator grounding congurations Generators with different DC grounded schemes can be paralleled safely
Compact modular design Minimal conguration eliminates job-specic engineering; easy to expand
Simple operation Entire system starts with single contact or door control switch
www.EmersonNetworkPower.com/ASCO
Emerson Network Power - Global Headquarters
1050 Dearborn Drive
Columbus, OH 43085
Tel: +1 614 888 0246
ASCO Power Technologies - Global Headquarters
50 Hanover Road
Florham Park, NJ 07932
800-800-ASCO
www.ascoapu.com
Power transfer at your fingertips.
Revolutionary Design
At the core of the 336 Paralleling System is a eld
proven closed transition transfer switch (CTTS). This is
a highly reliable mechanism that studies have shown
to have more endurance life than competitive products.
Incorporating advanced components into the 336
Paralleling System help make it a superior alternative to
conventional circuit breaker-based systems.
Using AC power from the generators to switch the
CTTS with the latest control system technology,
the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system.
This design technique eliminates the need for costly
and maintenance-prone lead-acid batteries often
found in conventional switchgear systems.
Digital Link
Distributed Control, No Master Control Required
Emerson. Consider it Solved., Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2014 Emerson Electric Co. All rights reserved.
Publication 3278 © August, 2014 Printed in the U.S.A.
23
Redefining Paralleling Systems.
Since introducing the rst power transfer switch in 1920,
ASCO has been committed to providing reliable technology,
superior support and dedicated eld service to satisfy power
switching and controls requirements for critical operations.
Throughout the more than 90 years of power transfer tech-
nology development, ASCO has introduced every signicant
product innovation in the industry.
That leadership and commitment to innovation continues
with the 336 Paralleling System. Incorporating eld-proven,
reliable technology in a patented dual operator transfer
switch mechanism, the 336 Paralleling System meets the
needs of design build projects: cost effective, reliability,
and quick delivery.
The 336 Paralleling System, available from 208 to 600
Volts, is the rst transfer switch-based paralleling system
on the market. It combines robust UL approved components
in a standardized design that brings added exibility,
reliability, and cost savings to any project.
A Superior Choice
Feature Benefit
Revolutionary CTTS-based design High reliability and endurance
Utilizes generator power for switching Eliminates costly and maintenance-prone, lead-acid batteries
Exclusive load management feature Maximum protection of priority one loads
Handles all generator grounding congurations Generators with different DC grounded schemes can be paralleled safely
Compact modular design Minimal conguration eliminates job-specic engineering; easy to expand
Simple operation Entire system starts with single contact or door control switch
www.EmersonNetworkPower.com/ASCO
Emerson Network Power - Global Headquarters
1050 Dearborn Drive
Columbus, OH 43085
Tel: +1 614 888 0246
ASCO Power Technologies - Global Headquarters
50 Hanover Road
Florham Park, NJ 07932
800-800-ASCO
www.ascoapu.com
Power transfer at your fingertips.
Revolutionary Design
At the core of the 336 Paralleling System is a eld
proven closed transition transfer switch (CTTS). This is
a highly reliable mechanism that studies have shown
to have more endurance life than competitive products.
Incorporating advanced components into the 336
Paralleling System help make it a superior alternative to
conventional circuit breaker-based systems.
Using AC power from the generators to switch the
CTTS with the latest control system technology,
the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system.
This design technique eliminates the need for costly
and maintenance-prone lead-acid batteries often
found in conventional switchgear systems.
Digital Link
Distributed Control, No Master Control Required
Emerson. Consider it Solved., Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2014 Emerson Electric Co. All rights reserved.
Publication 3278 © August, 2014 Printed in the U.S.A.
23
Redefining Paralleling Systems.
Since introducing the rst power transfer switch in 1920,
ASCO has been committed to providing reliable technology,
superior support and dedicated eld service to satisfy power
switching and controls requirements for critical operations.
Throughout the more than 90 years of power transfer tech-
nology development, ASCO has introduced every signicant
product innovation in the industry.
That leadership and commitment to innovation continues
with the 336 Paralleling System. Incorporating eld-proven,
reliable technology in a patented dual operator transfer
switch mechanism, the 336 Paralleling System meets the
needs of design build projects: cost effective, reliability,
and quick delivery.
The 336 Paralleling System, available from 208 to 600
Volts, is the rst transfer switch-based paralleling system
on the market. It combines robust UL approved components
in a standardized design that brings added exibility,
reliability, and cost savings to any project.
A Superior Choice
Feature Benefit
Revolutionary CTTS-based design High reliability and endurance
Utilizes generator power for switching Eliminates costly and maintenance-prone, lead-acid batteries
Exclusive load management feature Maximum protection of priority one loads
Handles all generator grounding congurations Generators with different DC grounded schemes can be paralleled safely
Compact modular design Minimal conguration eliminates job-specic engineering; easy to expand
Simple operation Entire system starts with single contact or door control switch
www.EmersonNetworkPower.com/ASCO
Emerson Network Power - Global Headquarters
1050 Dearborn Drive
Columbus, OH 43085
Tel: +1 614 888 0246
ASCO Power Technologies - Global Headquarters
50 Hanover Road
Florham Park, NJ 07932
800-800-ASCO
www.ascoapu.com
Power transfer at your fingertips.
Revolutionary Design
At the core of the 336 Paralleling System is a eld
proven closed transition transfer switch (CTTS). This is
a highly reliable mechanism that studies have shown
to have more endurance life than competitive products.
Incorporating advanced components into the 336
Paralleling System help make it a superior alternative to
conventional circuit breaker-based systems.
Using AC power from the generators to switch the
CTTS with the latest control system technology,
the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system.
This design technique eliminates the need for costly
and maintenance-prone lead-acid batteries often
found in conventional switchgear systems.
Digital Link
Distributed Control, No Master Control Required
Emerson. Consider it Solved., Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2014 Emerson Electric Co. All rights reserved.
Publication 3278 © August, 2014 Printed in the U.S.A.
23
Powerful Management Tools
ASCO innovation has also led to the development of a Power
Management option with a robust tool set that improves
overall operation and efciency.
Load Management – A unique feature that allows for up to
four levels of load control. Priority one loads are given maxi-
mum protection by allowing lower priority loads (four, three,
and then two) to shed rst. Load shedding is
accomplished by ASCO’s time-proven algorithms based on
the percentage of system load. The 336 Paralleling System
adds load based on the actual KW entered during startup
rather than the number of generator sets in operation. This
unique approach works with any number of generators running.
Generator Management – The 336 Paralleling System’s
generator management feature will automatically start and
stop generators as needed to maintain a preset spinning
reserve or safety margin between the actual load consumed
and the total power available from all running generators.
This management tool saves generator maintenance costs
and reduces fuel consumption for more efcient operation.
Start Next Generator on Alarm – The 336 Paralleling
System automatically communicates with the genset control
system to seamlessly maintain your critical loads. If a genset
drops into a warning mode, an alarm sounds and the next
priority generator is started and added to the bus, replacing
the genset that caused the alarm.
Run Time Management – With this capability, generators
can be set to automatically start and stop to control run
time. Settings can be established to equalize running
hours or intentionally offset running hours to stagger
routine maintenance.
Parallel Dissimilar Generators
If you have different brands or various models of generators
from the same manufacturer, the 336 Paralleling System is
perfect for you. A dissimilar generator ground conguration
option – another ASCO innovation – adds components to
the 336 Paralleling System so it can be integrated with any
generator, regardless of size or manufacturer. The option
allows generators of different DC grounding schemes to be
paralleled.
High Reliability
ASCO has incorporated a superior hub and spoke design into
the 336 Paralleling System. This provides a added level of
redundancy compared to daisy-chained systems, all of which
means a single failure no longer results in the entire system
shutting down.
Redundant electrical protection in the existing generator
circuit breaker and the 336 Paralleling System provides a
superior level of protection. A generator circuit breaker trip
coil/wire break monitoring feature monitors the circuit
breaker trip coil and may be programmed for trip or alarm
of the genset.
Easily Expandable
The 336 Paralleling System brings an unprecedented level
of modularity and expandability to a variety of applications.
With front access options and a footprint as small as
28” D x 38” W, the 336 Paralleling System can be designed
into compact power generation congurations. This design
approach also requires minimal conguration in the base
unit, eliminating the need for job-specic engineering.
Utilizing a modular approach, it is easy to expand a two-
generator system to a four-unit conguration. The exible
design will also accommodate larger requirements with
custom designs for customers. Additionally, UL891 distribution
circuit breakers can easily be added with a standard bus interface.
Intuitive Operation
A simple control interface on the 336 Paralleling System
allows the entire system to be started with a single contact
or switch. Easy-to-operate fault tolerant controls, along
with ANSI protective functions, ensure the CTTS will provide
maximum protective functions for your power system with
the added back-up of the generator circuit breaker for
overcurrent faults.
An Operator Interface Terminal (OIT) features 16
programmable tri-color LEDs and 8 programmable push
buttons. The OIT features functions for off/cool down, auto
mode, priority load force on, and reset load management
to auto.
Fits in Any Application
The reliability, size and cost benets make the 336 Paralleling
System perfect for a variety of environments.
Oil and Gas – The 336 Paralleling System can serve as a
Parallel Power Island (PPI) or prime power system at fracking
and drilling sites that require temporary primary power.
Healthcare – Hospitals and healthcare clinics can utilize
the 336 Paralleling System as an affordable and reliable
back up power system.
Grid Support – A perfect solution to meet demand in
interruptible service or peak control programs to save you
money. A multi-generator 336 Paralleling System may be
a more cost-efcient and redundant solution than a single
large generator.
System Solutions – The 336 Paralleling System can be
combined with ASCO Series 300/4000/7000 Transfer
Switches and PowerQuest® Critical Power Management
Systems.
Oil and Gas Grid SupportHealthcare
Master Control Panel with Optional Power Management
Generator OIT
Generator Controls
336 Product Components
Master Control Panel
Generator 1 Controller
Generator 2 Controller
Generator 1 OIT
Generator 2 OIT
Isolated
Power
Supplies
Gen 1 and Gen 2 DC
Connection AC Fuses
Priority Relays(behind door)
Gen 2 CTs
Gen 2 Connections
Gen 1 Connections
Gen 1 CTs
Generator 1
Controller
Generator 2
Controller
Customer Terminal Board
‘the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system’
*Note: These are all congured for 3 phase, so there is no voltage code for 120V or 277V.
1. Modularity/expandability: a 337 may be added later to a 336 system, provided the power distribution bus, if any, is done correctly. Be sure to match
options! If 336 has 160PM or 160PS, be sure to order the same options for the 337.
2. Amp Rating is either the sum of generator rated currents or rounded up to the next available rating size equal to or less than the largest generator.
Example: two 600A gensets will use a 1200 Amp Rating. Larger generators may be possible, please consult factory. Amp Rating automatically selects
frame size and CT ratio.
336 Amp Ratings
336 Dimensions
Accessories specific for 300 series products all start with 160:
160PM: Power Management includes: (On 4 gen systems, must be ordered on both 336 and 337 to work properly.)
— 4 levels of Load Management (Load Shed/Load Add), Priority 1 never sheds. Priority 2, 3, 4 loads
are managed via ASCO option 30A in load ATS’s.
— Bus Optimization (Gen Shed/Gen Add).
— Start Next Gen on Alarm.
— Run Time Management or Run Time Equalization.
160PS: Isolated power supplies are required for installations where the generators’ DC systems have dissimilar
grounding schemes and recommended for all installations. Consult product information for more details.
Must be ordered on both 336 and 337 products for proper operation.
160DS: Dissimilar Sized Gensets. Standard conguration is with 2 generators of the same size; order this option if the
installation has 2 different sized generators. Sums of the currents must be below the Amp Rating. Specify gen sizes
in notes.
160CD: Custom Drawings. Generic drawings are standard. For custom or “as installed” drawings, purchase this option.
161TD1: Color HMI. A 7” color touchscreen, the ASCO TDI. 1 HMI per 336. 1 HMI per 337. Preloaded with ASCO
standard screens. Each HMI will display the data for the 2 gens in that section/on that CTTS. Includes a 72EE as an
Ethernet switch. Consult product information for more details.
Cabling access:
1200A and below: Standard is front access for connections, optional rear access.
1201A and above is always rear access.
Optional Output Distribution breakers or Load Panel(s) requests are custom engineered and quoted for the
specic project with UL891 switchgear with either UL489 or UL1066 style breakers. Contact 800-800-ASCO or
E-mail customercare@asco.com for technical questions, delivery times, and pricing.
336 Ordering Information
Standard Accessories compatible with 336/337: Consult factory for details.
44A (space heaters), 73 (surge arrestor), 131 (ARRA compliance certication)
456 7
Powerful Management Tools
ASCO innovation has also led to the development of a Power
Management option with a robust tool set that improves
overall operation and efciency.
Load Management – A unique feature that allows for up to
four levels of load control. Priority one loads are given maxi-
mum protection by allowing lower priority loads (four, three,
and then two) to shed rst. Load shedding is
accomplished by ASCO’s time-proven algorithms based on
the percentage of system load. The 336 Paralleling System
adds load based on the actual KW entered during startup
rather than the number of generator sets in operation. This
unique approach works with any number of generators running.
Generator Management – The 336 Paralleling System’s
generator management feature will automatically start and
stop generators as needed to maintain a preset spinning
reserve or safety margin between the actual load consumed
and the total power available from all running generators.
This management tool saves generator maintenance costs
and reduces fuel consumption for more efcient operation.
Start Next Generator on Alarm – The 336 Paralleling
System automatically communicates with the genset control
system to seamlessly maintain your critical loads. If a genset
drops into a warning mode, an alarm sounds and the next
priority generator is started and added to the bus, replacing
the genset that caused the alarm.
Run Time Management – With this capability, generators
can be set to automatically start and stop to control run
time. Settings can be established to equalize running
hours or intentionally offset running hours to stagger
routine maintenance.
Parallel Dissimilar Generators
If you have different brands or various models of generators
from the same manufacturer, the 336 Paralleling System is
perfect for you. A dissimilar generator ground conguration
option – another ASCO innovation – adds components to
the 336 Paralleling System so it can be integrated with any
generator, regardless of size or manufacturer. The option
allows generators of different DC grounding schemes to be
paralleled.
High Reliability
ASCO has incorporated a superior hub and spoke design into
the 336 Paralleling System. This provides a added level of
redundancy compared to daisy-chained systems, all of which
means a single failure no longer results in the entire system
shutting down.
Redundant electrical protection in the existing generator
circuit breaker and the 336 Paralleling System provides a
superior level of protection. A generator circuit breaker trip
coil/wire break monitoring feature monitors the circuit
breaker trip coil and may be programmed for trip or alarm
of the genset.
Easily Expandable
The 336 Paralleling System brings an unprecedented level
of modularity and expandability to a variety of applications.
With front access options and a footprint as small as
28” D x 38” W, the 336 Paralleling System can be designed
into compact power generation congurations. This design
approach also requires minimal conguration in the base
unit, eliminating the need for job-specic engineering.
Utilizing a modular approach, it is easy to expand a two-
generator system to a four-unit conguration. The exible
design will also accommodate larger requirements with
custom designs for customers. Additionally, UL891 distribution
circuit breakers can easily be added with a standard bus interface.
Intuitive Operation
A simple control interface on the 336 Paralleling System
allows the entire system to be started with a single contact
or switch. Easy-to-operate fault tolerant controls, along
with ANSI protective functions, ensure the CTTS will provide
maximum protective functions for your power system with
the added back-up of the generator circuit breaker for
overcurrent faults.
An Operator Interface Terminal (OIT) features 16
programmable tri-color LEDs and 8 programmable push
buttons. The OIT features functions for off/cool down, auto
mode, priority load force on, and reset load management
to auto.
Fits in Any Application
The reliability, size and cost benets make the 336 Paralleling
System perfect for a variety of environments.
Oil and Gas – The 336 Paralleling System can serve as a
Parallel Power Island (PPI) or prime power system at fracking
and drilling sites that require temporary primary power.
Healthcare – Hospitals and healthcare clinics can utilize
the 336 Paralleling System as an affordable and reliable
back up power system.
Grid Support – A perfect solution to meet demand in
interruptible service or peak control programs to save you
money. A multi-generator 336 Paralleling System may be
a more cost-efcient and redundant solution than a single
large generator.
System Solutions – The 336 Paralleling System can be
combined with ASCO Series 300/4000/7000 Transfer
Switches and PowerQuest® Critical Power Management
Systems.
Oil and Gas Grid SupportHealthcare
Master Control Panel with Optional Power Management
Generator OIT
Generator Controls
336 Product Components
Master Control Panel
Generator 1 Controller
Generator 2 Controller
Generator 1 OIT
Generator 2 OIT
Isolated
Power
Supplies
Gen 1 and Gen 2 DC
Connection AC Fuses
Priority Relays(behind door)
Gen 2 CTs
Gen 2 Connections
Gen 1 Connections
Gen 1 CTs
Generator 1
Controller
Generator 2
Controller
Customer Terminal Board
‘the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system’
*Note: These are all congured for 3 phase, so there is no voltage code for 120V or 277V.
1. Modularity/expandability: a 337 may be added later to a 336 system, provided the power distribution bus, if any, is done correctly. Be sure to match
options! If 336 has 160PM or 160PS, be sure to order the same options for the 337.
2. Amp Rating is either the sum of generator rated currents or rounded up to the next available rating size equal to or less than the largest generator.
Example: two 600A gensets will use a 1200 Amp Rating. Larger generators may be possible, please consult factory. Amp Rating automatically selects
frame size and CT ratio.
336 Amp Ratings
336 Dimensions
Accessories specific for 300 series products all start with 160:
160PM: Power Management includes: (On 4 gen systems, must be ordered on both 336 and 337 to work properly.)
— 4 levels of Load Management (Load Shed/Load Add), Priority 1 never sheds. Priority 2, 3, 4 loads
are managed via ASCO option 30A in load ATS’s.
— Bus Optimization (Gen Shed/Gen Add).
— Start Next Gen on Alarm.
— Run Time Management or Run Time Equalization.
160PS: Isolated power supplies are required for installations where the generators’ DC systems have dissimilar
grounding schemes and recommended for all installations. Consult product information for more details.
Must be ordered on both 336 and 337 products for proper operation.
160DS: Dissimilar Sized Gensets. Standard conguration is with 2 generators of the same size; order this option if the
installation has 2 different sized generators. Sums of the currents must be below the Amp Rating. Specify gen sizes
in notes.
160CD: Custom Drawings. Generic drawings are standard. For custom or “as installed” drawings, purchase this option.
161TD1: Color HMI. A 7” color touchscreen, the ASCO TDI. 1 HMI per 336. 1 HMI per 337. Preloaded with ASCO
standard screens. Each HMI will display the data for the 2 gens in that section/on that CTTS. Includes a 72EE as an
Ethernet switch. Consult product information for more details.
Cabling access:
1200A and below: Standard is front access for connections, optional rear access.
1201A and above is always rear access.
Optional Output Distribution breakers or Load Panel(s) requests are custom engineered and quoted for the
specic project with UL891 switchgear with either UL489 or UL1066 style breakers. Contact 800-800-ASCO or
E-mail customercare@asco.com for technical questions, delivery times, and pricing.
336 Ordering Information
Standard Accessories compatible with 336/337: Consult factory for details.
44A (space heaters), 73 (surge arrestor), 131 (ARRA compliance certication)
456 7
Powerful Management Tools
ASCO innovation has also led to the development of a Power
Management option with a robust tool set that improves
overall operation and efciency.
Load Management – A unique feature that allows for up to
four levels of load control. Priority one loads are given maxi-
mum protection by allowing lower priority loads (four, three,
and then two) to shed rst. Load shedding is
accomplished by ASCO’s time-proven algorithms based on
the percentage of system load. The 336 Paralleling System
adds load based on the actual KW entered during startup
rather than the number of generator sets in operation. This
unique approach works with any number of generators running.
Generator Management – The 336 Paralleling System’s
generator management feature will automatically start and
stop generators as needed to maintain a preset spinning
reserve or safety margin between the actual load consumed
and the total power available from all running generators.
This management tool saves generator maintenance costs
and reduces fuel consumption for more efcient operation.
Start Next Generator on Alarm – The 336 Paralleling
System automatically communicates with the genset control
system to seamlessly maintain your critical loads. If a genset
drops into a warning mode, an alarm sounds and the next
priority generator is started and added to the bus, replacing
the genset that caused the alarm.
Run Time Management – With this capability, generators
can be set to automatically start and stop to control run
time. Settings can be established to equalize running
hours or intentionally offset running hours to stagger
routine maintenance.
Parallel Dissimilar Generators
If you have different brands or various models of generators
from the same manufacturer, the 336 Paralleling System is
perfect for you. A dissimilar generator ground conguration
option – another ASCO innovation – adds components to
the 336 Paralleling System so it can be integrated with any
generator, regardless of size or manufacturer. The option
allows generators of different DC grounding schemes to be
paralleled.
High Reliability
ASCO has incorporated a superior hub and spoke design into
the 336 Paralleling System. This provides a added level of
redundancy compared to daisy-chained systems, all of which
means a single failure no longer results in the entire system
shutting down.
Redundant electrical protection in the existing generator
circuit breaker and the 336 Paralleling System provides a
superior level of protection. A generator circuit breaker trip
coil/wire break monitoring feature monitors the circuit
breaker trip coil and may be programmed for trip or alarm
of the genset.
Easily Expandable
The 336 Paralleling System brings an unprecedented level
of modularity and expandability to a variety of applications.
With front access options and a footprint as small as
28” D x 38” W, the 336 Paralleling System can be designed
into compact power generation congurations. This design
approach also requires minimal conguration in the base
unit, eliminating the need for job-specic engineering.
Utilizing a modular approach, it is easy to expand a two-
generator system to a four-unit conguration. The exible
design will also accommodate larger requirements with
custom designs for customers. Additionally, UL891 distribution
circuit breakers can easily be added with a standard bus interface.
Intuitive Operation
A simple control interface on the 336 Paralleling System
allows the entire system to be started with a single contact
or switch. Easy-to-operate fault tolerant controls, along
with ANSI protective functions, ensure the CTTS will provide
maximum protective functions for your power system with
the added back-up of the generator circuit breaker for
overcurrent faults.
An Operator Interface Terminal (OIT) features 16
programmable tri-color LEDs and 8 programmable push
buttons. The OIT features functions for off/cool down, auto
mode, priority load force on, and reset load management
to auto.
Fits in Any Application
The reliability, size and cost benets make the 336 Paralleling
System perfect for a variety of environments.
Oil and Gas – The 336 Paralleling System can serve as a
Parallel Power Island (PPI) or prime power system at fracking
and drilling sites that require temporary primary power.
Healthcare – Hospitals and healthcare clinics can utilize
the 336 Paralleling System as an affordable and reliable
back up power system.
Grid Support – A perfect solution to meet demand in
interruptible service or peak control programs to save you
money. A multi-generator 336 Paralleling System may be
a more cost-efcient and redundant solution than a single
large generator.
System Solutions – The 336 Paralleling System can be
combined with ASCO Series 300/4000/7000 Transfer
Switches and PowerQuest® Critical Power Management
Systems.
Oil and Gas Grid SupportHealthcare
Master Control Panel with Optional Power Management
Generator OIT
Generator Controls
336 Product Components
Master Control Panel
Generator 1 Controller
Generator 2 Controller
Generator 1 OIT
Generator 2 OIT
Isolated
Power
Supplies
Gen 1 and Gen 2 DC
Connection AC Fuses
Priority Relays(behind door)
Gen 2 CTs
Gen 2 Connections
Gen 1 Connections
Gen 1 CTs
Generator 1
Controller
Generator 2
Controller
Customer Terminal Board
‘the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system’
*Note: These are all congured for 3 phase, so there is no voltage code for 120V or 277V.
1. Modularity/expandability: a 337 may be added later to a 336 system, provided the power distribution bus, if any, is done correctly. Be sure to match
options! If 336 has 160PM or 160PS, be sure to order the same options for the 337.
2. Amp Rating is either the sum of generator rated currents or rounded up to the next available rating size equal to or less than the largest generator.
Example: two 600A gensets will use a 1200 Amp Rating. Larger generators may be possible, please consult factory. Amp Rating automatically selects
frame size and CT ratio.
336 Amp Ratings
336 Dimensions
Accessories specific for 300 series products all start with 160:
160PM: Power Management includes: (On 4 gen systems, must be ordered on both 336 and 337 to work properly.)
— 4 levels of Load Management (Load Shed/Load Add), Priority 1 never sheds. Priority 2, 3, 4 loads
are managed via ASCO option 30A in load ATS’s.
— Bus Optimization (Gen Shed/Gen Add).
— Start Next Gen on Alarm.
— Run Time Management or Run Time Equalization.
160PS: Isolated power supplies are required for installations where the generators’ DC systems have dissimilar
grounding schemes and recommended for all installations. Consult product information for more details.
Must be ordered on both 336 and 337 products for proper operation.
160DS: Dissimilar Sized Gensets. Standard conguration is with 2 generators of the same size; order this option if the
installation has 2 different sized generators. Sums of the currents must be below the Amp Rating. Specify gen sizes
in notes.
160CD: Custom Drawings. Generic drawings are standard. For custom or “as installed” drawings, purchase this option.
161TD1: Color HMI. A 7” color touchscreen, the ASCO TDI. 1 HMI per 336. 1 HMI per 337. Preloaded with ASCO
standard screens. Each HMI will display the data for the 2 gens in that section/on that CTTS. Includes a 72EE as an
Ethernet switch. Consult product information for more details.
Cabling access:
1200A and below: Standard is front access for connections, optional rear access.
1201A and above is always rear access.
Optional Output Distribution breakers or Load Panel(s) requests are custom engineered and quoted for the
specic project with UL891 switchgear with either UL489 or UL1066 style breakers. Contact 800-800-ASCO or
E-mail customercare@asco.com for technical questions, delivery times, and pricing.
336 Ordering Information
Standard Accessories compatible with 336/337: Consult factory for details.
44A (space heaters), 73 (surge arrestor), 131 (ARRA compliance certication)
456 7
*Note: These are all congured for 3 phase, so there is no voltage code for 120V or 277V.
1. Modularity/expandability: a 337 may be added later to a 336 system, provided the power distribution bus, if any, is done correctly. Be sure to match
options! If 336 has 160PM or 160PS, be sure to order the same options for the 337.
2. Amp Rating is either the sum of generator rated currents rounded up to the next available rating size or equal to or less than the largest generator.
Example: two 600A gensets will use a 1200 Amp Rating. Larger generators may be possible, please consult factory. Amp Rating automatically selects
frame size in a cumulative conguration CT ratio.
336 Amp Ratings
336 Dimensions
Accessories specific for 300 series products all start with 160:
160PM: Power Management includes: (On 4 gen systems, must be ordered on both 336 and 337 to work properly.)
— 4 levels of Load Management (Load Shed/Load Add), Priority 1 never sheds. Priority 2, 3, 4 loads
are managed via ASCO option 30A in load ATS’s.
— Bus Optimization (Gen Shed/Gen Add).
— Start Next Gen on Alarm.
— Run Time Management or Run Time Equalization.
160PS: Isolated power supplies are required for installations where the generators’ DC systems have dissimilar
grounding schemes and recommended for all installations. Consult product information for more details.
Must be ordered on both 336 and 337 products for proper operation.
160DS: Dissimilar Sized Gensets. Standard conguration is with 2 generators of the same size; order this option if the
installation has 2 different sized generators. Sums of the currents must be below the Amp Rating. Specify gen sizes
in notes.
160CD: Custom Drawings. Generic drawings are standard. For custom or “as installed” drawings, purchase this option.
161TD1: Color HMI. A 7” color touchscreen, the ASCO TDI. 1 HMI per 336. 1 HMI per 337. Preloaded with ASCO
standard screens. Each HMI will display the data for the 2 gens in that section/on that CTTS. Includes a 72EE as an
Ethernet switch. Consult product information for more details.
160LU: For special lugs
Cabling access:
1200A and below: Standard is front access for connections, optional rear access.
1201A and above is always rear access.
Optional Output Distribution breakers or Load Panel(s) requests are custom engineered and quoted for the
specic project with UL891 switchgear with either UL489 or UL1066 style breakers. Contact 800-800-ASCO or
E-mail customercare@asco.com for technical questions, delivery times, and pricing.
336 Ordering Information
Standard Accessories compatible with 336/337: Consult factory for details.
44A (space heaters), 73 (surge arrestor), 131 (ARRA compliance certication)
7
Redefining Paralleling Systems.
Since introducing the rst power transfer switch in 1920,
ASCO has been committed to providing reliable technology,
superior support and dedicated eld service to satisfy power
switching and controls requirements for critical operations.
Throughout the more than 90 years of power transfer tech-
nology development, ASCO has introduced every signicant
product innovation in the industry.
That leadership and commitment to innovation continues
with the 336 Paralleling System. Incorporating eld-proven,
reliable technology in a patented dual operator transfer
switch mechanism, the 336 Paralleling System meets the
needs of design build projects: cost effective, reliability,
and quick delivery.
The 336 Paralleling System, available from 208 to 600
Volts, is the rst transfer switch-based paralleling system
on the market. It combines robust UL approved components
in a standardized design that brings added exibility,
reliability, and cost savings to any project.
A Superior Choice
Feature Benefit
Revolutionary CTTS-based design High reliability and endurance
Utilizes generator power for switching Eliminates costly and maintenance-prone, lead-acid batteries
Exclusive load management feature Maximum protection of priority one loads
Handles all generator grounding congurations Generators with different DC grounded schemes can be paralleled safely
Compact modular design Minimal conguration eliminates job-specic engineering; easy to expand
Simple operation Entire system starts with single contact or door control switch
www.EmersonNetworkPower.com/ASCO
Emerson Network Power - Global Headquarters
1050 Dearborn Drive
Columbus, OH 43085
Tel: +1 614 888 0246
ASCO Power Technologies - Global Headquarters
50 Hanover Road
Florham Park, NJ 07932
800-800-ASCO
www.ascoapu.com
Power transfer at your fingertips.
Revolutionary Design
At the core of the 336 Paralleling System is a eld
proven closed transition transfer switch (CTTS). This is
a highly reliable mechanism that studies have shown
to have more endurance life than competitive products.
Incorporating advanced components into the 336
Paralleling System help make it a superior alternative to
conventional circuit breaker-based systems.
Using AC power from the generators to switch the
CTTS with the latest control system technology,
the 336 Paralleling System can detect and recover
accordingly from common problems and
automatically start the next generator in the system.
This design technique eliminates the need for costly
and maintenance-prone lead-acid batteries often
found in conventional switchgear systems.
Digital Link
Distributed Control, No Master Control Required
Emerson. Consider it Solved., Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co. ©2014 Emerson Electric Co. All rights reserved.
Publication 3278 © August, 2014 Printed in the U.S.A.
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