ASCO 7000 Series IEC Medium Voltage Power Transfer Switches
Where Supply and Demand Connect
ASCO 7000 Series IEC Medium Voltage Power Transfer Switches
Power Continuity for:
• Healthcare Facilities
• Telecom Exchanges
• Industrial Complexes
• Data Centers
• Chemical Industry
• Refineries
• Waste Water Treatment
• Retail Business Centers
• Other Mission Critical Facilities
The availability, quality and reliability of electrical power can
ASCO products can transform what could be a major
impact life, safety, productivity and financial success.
catastrophe into complete assurance.
ASCO Power Technologies provides solutions to assure the
With a variety of configurations, options and transfer modes
continuity of power, from the design stage to installation,
including open, delayed, and closed, ASCO 7000 Series
start-up and beyond: complete coverage for continuous
Medium Voltage Power Transfer Switches deliver per
power.
specifications and leverage industry leading switchgear per
the IEC 62271-200 standard for metal-enclosed switchgear
and controlgear.
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Engineered For Quality
Factory Testing On Every Assembly
The Innovation of ASCO Medium Voltage Power Transfer Switches
ASCO 7000 SERIES IEC Medium Voltage Power Transfer Switches
IEC Class: 7.2kV, 12kV and 24kV; Up to 2500 Ampere
Voltage
Class
Rated
Current
(Amp)
630
1250
7.2kV
or
12kV
2000
Remarks
Width *
Depth
Height
2400
1350
2200
Same For Fixed
or Draw Out PT
2400
1970
2200
Fixed PT
Draw Out PT
2800
1350
2200
2400
1970
2200
Fixed PT
2800
1350
2200
Draw Out PT
1250
3000
1810
2855
2000
3000
2448
2855
2500
24kV
Med Voltage Transfer
Switch Dimensions
(mm)
Fixed PT only
* Width is for gear without side panels for integration into larger switchgear
lineups. Side panels for standalone installation add a total of 70mm to the
width shown above. All equipment ships with removable side panels on the
2 end sections.
An ASCO 7000 Series microprocessor-based controller
The chart below provides an overview of the Short Time and
(Transfer Control Center) manages breaker operation to
Peak Withstand ratings currently available.
transfer between critical loads and between power sources.
Contact your local representative for availability of other
Comprising voltage classes of 7.2 kV, 12 kV and 24kV per
options.
IEC standards, the Medium Voltage Transfer Switch may
be equipped with protective relays, power metering, and
Voltage
Class
Rated
Current
Ethernet communications to meet installation requirements.
630A
Additionally, custom engineered solutions per specifications
1250A
may also be accommodated. Switch mode options include
2000A
open transition, closed transition, and delayed transition.
7.2kV
or
12kV
industry leading breaker technology and are approved with
2000A
63 kA
31.5kA
80kA
25kA
63kA
31.5kA
80kA
2500A
internal arc classification IAC A FLR, loss of service continuity
requirements regarding personal safety.
25 kA
630A
1250A
suitable for universal installation, meeting the highest
Peak Withstand
Current
2500A
All ASCO 7000 Medium Voltage Transfer Switches utilize
category LSC 2B and partition class PM. This makes them
Short Time Withstand
Current
(4 sec)
1250A
24kV
2000A
1250A
2000A
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ASCO 7000 SERIES Medium Voltage Power Transfer Switches (IEC)
ASCO Medium Voltage Power Transfer Switches are
rated up to 24kV, with current capacities of 630
through 2500 amperes.
The Medium Voltage Automatic Transfer Switch basic
configuration comprises three modular vertical sections.
Key components and features include:
¾ ASCO 7000 Series Transfer Control Center For Open Transition,
Closed Transition, Or Delayed Transition Operation
¾ Use of maintenance-free vacuum circuit-breakers with optional
Protective Relaying
• One (1) Normal Source VCB
• One (1) Emergency Source VCB
¾ Two (2) Normal Source Fused Voltage Transformers (V/V)
¾ Two (2) Emergency Source Fused Voltage Transformers (V/V)
¾ Confinement of an internal arc to the respective compartment up
to 40 kA (31.5kA for 24kV)
¾ Standard Accessories:
• 1G External 24VDC auxiliary power connections
• 18B 2 pole double-throw contacts that operate when
emergency source voltage is present
• 18G 2 pole double-throw contacts that operate when normal
source voltage is present
• 30E Load Shed circuit
ASCO 7000 SERIES IEC Medium Voltage
Power Transfer Switch
(Load Section Shown On Right)
• 31Z Selective Load Disconnect circuit
• Strip Heaters For Temperature and Humidity Control
• Maintenance Lighting In Control and Rear Cable Compartments
¾ Optional Protective Relay
¾ Optional Power Metering and Ethernet communications
¾ Integration with ASCO’s Critical Power Management System for
advanced monitoring and control of your facilities critical power
systems
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At the Crossroads of Performance and Simplicity
Transfer Switch Controller
Medium Voltage Transfer Switch Specifications
The ASCO 7000 Series Transfer Control Center provides refined
and proven transfer control for low and medium voltage switches,
leveraging almost a century of power transfer innovation and
application experience.
Voltage
Nominal System Voltage
Ampacity Rating
7.2 kV
3.3kV
6kV
12 kV
6.6kV 10kV
11kV
630A,1250A,2000A,2500A
Number of Sections
Yes
Circuit Breakers
Arc Resistance
IAC A FLR
Bottom Cable Entry
Yes
ASCO 7000 Series Medium Voltage Power Switches use vacuum
circuit breakers for superior reliability and maintainability.
Each circuit breaker is listed according to IEC 62271-100 and is
suitable for all indoor switching duties. Breakers are designed for
maintenance-free operation under normal climatic conditions and
the maximum permissible number of operating cycles.
Draw Out Circuit Breakers
Yes
Automatic Shutters
Yes
Grounded Barriers
Yes
Powder Coated with Epoxy
Resins
Yes
Enclosure Rating
IP4X
Normal Source and Emergency Source circuit breakers are
interchangeable due to identical ratings and configuration. Stored
energy mechanisms include electric motor charging and a manual
charging handle. Breakers are designed and manufactured to
assure safe withdrawal for inspection and to facilitate maintenance.
Arc Safety
Overview of Standards
RAL 7035
Protective Relays
Optional
Ethernet/Serial
Communications
Optional
Power Metering
Optional
Instrument transformers include Current Transformers (CT) and
Voltage Transformers (VT, a.k.a. Potential Transformers - PT) to
measure circuit voltage and current.
Controlgear Assembly
IEC Standard
GB Standard
IEC 62 271-1
GB/T 11022
IEC 62 271-200
GB 3906
Circuit-breaker
IEC 62 271-100
GB 1984
Disconnector and Earthing Switch
IEC 62 271-102
GB 1985
High-voltage alternating current
switch-fuse combinations
IEC 62 271-105
GB 16926
Fuse
IEC 60 282-1
GB 15166.2
Voltage Detection Device
IEC 61 243-5
-
IEC 60 529
GB/T 4208
Degree of Protection
Yes
Standard Color
Instrument Transformers
Internal arc classified switchgear according to IAC AFLR; front,
lateral and rear accessibility for all short circuit currents and an arc
duration of 1s.
Switchgear
22kV
1250A,2000A
3
IEC 62271-200
Integrated Mimic Diagram
24kV
20kV
Insulation
IEC 60 071-1
GB 311.1
Current Transformer
IEC 60 044-1
GB 1208
Voltage Transformer
IEC 60 044-2
GB 1207
Installation
IEC 61 936-1
GB 50254-GB 50259
The controlgear assembly is air-insulated, type-tested, metalenclosed and metal-clad medium-voltage switchgear for indoor
installation complying with IEC 62271-200. The panel consists
of three compartments: bus bar compartment, connection
compartment, and low-voltage compartment. The controlgear
has loss of service continuity category LSC 2B which allows access
to compartments while other adjacent compartments remain in
operation.
The complete enclosure and the partitions between the individual
compartments and covers are metallic and earthed. These features
guarantee the highest possible service continuity category.
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Transition Options and Control Modes
Open Transition Transfer Switching
Closed Transition Transfer Switching
ASCO Open Transition Transfer Switches feature non-overlapping
breaker operation, assuring that electrical power sources remain
isolated and effectively interrupting the flow of power. The switch
transfers in a ‘break before make’ mode.
ASCO Closed Transition Transfer Switches feature overlapping
breaker operation, permitting the transfer of electrical loads while
maintaining electrical continuity. The switch transfers in a ‘make
before break’ mode if all synchronization parameters for both
sources are within acceptable ranges. Control logic in the ASCO
Series 7000 Transfer Control Center monitors source conditions
and automatically determines if the transfer should be open
(conventional non-overlap mode) or closed transition or less.
Delayed Transition Transfer Switching
ASCO Delayed Transition Transfer Switches provide a prescribed
disconnect time for load transfers between power sources. The
adjustable period of delay allows stored energy loads to dissipate
power. Stored energy loads may include motors and drives,
rectifier banks, power correction and filtration devices, and load
management applications. Interlocking prevents direct connection
of both sources to the load concurrently.
Closed transition transfers occur within prescribed synchronization
parameters passively, without control of the engine generator
set operation. Therefore, no additional control wiring is required
between the ATS and engine generator set governor or voltage
regulator. Prescribed overlap time in a closed transition transfer is
typically 100 milliseconds or less.
Automatic and Manual Control Modes
The mode selector switch allows the user to select between
automatic and manual control modes. Automatic control
options include open, delayed and closed transition. Electrically
interlocked manual controls on the front door permit safe, usersupervised operation in non-automatic mode.
Breaker Control Switch
Mode Selector Switch
Allows the operator to trip the breaker in any control mode
The mode selector switch allows the user to select between
automatic and manual control modes. Every circuit breaker
includes, on the front door of its compartment, a breaker control
switch for manually opening and closing the circuit breaker when
the system is in manual mode. Electrical interlocks prevent
simultaneous closure of Normal and Emergency source breakers.
Manual trip of Normal and Emergency source breakers functions in
both automatic and manual modes.
Allows the operator to close the breaker in manual mode with
interlock protection
“Trip”, “Close”, and “NAT/NAC” positions.
Indicator LED
NAC (Normal After Close)
Red
NAT (Normal After Trip)
Green
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The ASCO 7000 Series Medium Voltage Power Transfer Switch includes advanced components such
as the ASCO 7000 Series Transfer Control Center and optional protective relays.
Options and Specified Components
Protective Relays
Protective relays address circuit protection and coordination
requirements not typically included in the scope of a transfer
switch.
Examples of circuit protection include:
• Instantaneous Overcurrent
• AC Inverse Time Overcurrent
• Directional Power
An additional relay device, known as a Lockout Relay, assures
fault acknowledgement by locking a breaker open after a fault
trip. The Lockout Relay, once a fault trip occurs, requires manual
intervention to reset the trip condition and allow the breaker to
resume automatic control.
In addition to adjustable protection parameters, protective relays
additionally facilitate the implementation of complex coordination
requirements by allowing sophisticated trip curve tuning.
The ASCO 7000 Series IEC Medium Voltage Power Transfer Switch
includes standardized selections of protective relay options.
Customer requirements of additional protective relaying may
also be specified.
Additional capabilities include web servers, gateways and
managed networks.
The A SCO Digital Power Meter provides additional
communication, protection and metering capabilities for normal
and emergency sourcing as well as loads, particularly useful for
measuring metering total power, generator and utility, delivered
to the load.
Power Monitoring
Power monitoring systems, commonly employed at many
facilities with sophisticated power distribution, provide a focal
point for systematic alarming, reports, control, diagnostic
and operational information. As these systems become more
sophisticated, providing analytical services such as operational
evaluations and service scheduling, the importance of
connectivity escalates.
Instrumentation, Control & Metering
With over a century of innovative firsts, ASCO excels in digital
instrumentation, controls and metering for electrical equipment.
Specified items can include:
Communication and Connectivity Capabilities
• PowerQuest Critical Power Management System (CPMS)
ASCO offers flexible and sophisticated communication options
including a variety of technologies and protocols to meet
connectivity requirements. Examples of peer and client/server
communication options include RS-485 and Ethernet connectivity
and Modbus ™ protocols.
• Digital metering: current, voltage, power, power factor,
frequency
• Discrete indicator lights for status and control
information at a glance
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ASCO 7000 Series Transfer Control Center
The ASCO 7000 Series Transfer Control Center provides power
transfer control to low voltage power transfer switches up to
4000 amperes and medium voltage power transfer switches
up to 2500 amperes.
Leveraging ASCO’s history and experience, the controller
combines state-of-the-art microprocessor technology,
superior noise immunity and advanced data computation and
evaluation algorithms.
It represents the standard for digital transfer switch technology
to which all others are measured, processing voltage, current
and frequency data, excelling in control logic, and reporting
status and diagnostic information with real-time urgency.
ASCO 7000 SERIES Transfer Control Center - Surge Specifications
Emission Standard - Group 1, Class A
EN 55011
Generic Immunity Standard
EN 50082-2
Electrostatic Discharge (ESD) Immunity
EN 61000-4-2
Radiated Electromagnetic Field Immunity
ENV 50140
Radiated RF Electromagnetic Field Immunity
EN 61000-4-3
Electrical Fast Transient (EFT) Immunity
EN 61000-4-4
Surge Transient Immunity
EN 61000-4-5
Conducted Radio-Frequency Field Immunity
EN 61000-4-6
Voltage Dips, Interruptions and Variations Immunity
EN 61000-4-11
ASCO 7000 Series
Microprocessor Controller
7
ASCO 7000 Series Transfer Control Center - Features
Digital microprocessor
Touch pad programming of features and settings without the need for meters or variable power supplies
On-board diagnostics provide status panel, integrated display and communication interface with system
status and performance information
Displays and counts down active time functions
Selectable multilingual display including English, German, Portuguese, Spanish, French and others upon request
Password protection to prevent unauthorized tampering with settings
Remote monitoring and control with ASCO PowerQuest communications products
Historical event log
Statistical system monitoring information available via integrated display and communication interface
Voltage and Frequency Sensing
Time Delays
• Under- and over-voltage settings on normal and emergency sources.
• Engine start time delay – adjustable from 0 to 6 seconds – delays
engine starting signal to override momentary normal source loss.
• Under- and over-frequency settings on normal and emergency.
• Transfer to emergency time delay – adjustable from 0 to 60 minutes.
• True RMS voltage sensing with +/- 1% accuracy.
• Frequency sensing with +/- 0.2% accuracy.
• Emergency source stabilization time delay – adjustable from 0 to 6
seconds – ignores momentary transients during initial generator set
loading.
• Phase sequence sensing for phase sensitive loads.
• Voltage unbalance detection between phases.
• Retransfer to normal – time delay with two settings:
o Power failure mode – adjustable from 0 to 60 m
o Test mode – adjustable from 0 to 10 h
Status and Control Features
• Output contact (N/O or N/C) for engine-start signals.
• Selection between “commit/no-commit” on transfer to emergency
after engine start and normal restores before transfer.
• Event log displays 99 logged events with time/date stamp, event type and event reason.
• Optional output signals for remote indication of normal and emergency
source acceptability
• Statistical system monitoring data screens which provide:
o Total number of transfers.
o Number of transfers caused by power source failure.
o Total number of days the transfer switch has been in operation.
o Total number of hours that the normal and emergency sources
have been available.
• Unloaded running time delay – adjustable from 0 to 60 minutes –
provides engine cool-down time before shutting down the engine.
• Pre- and post-transfer signal time delay – adjustable from 0 to 5 minutes
– is for selective load disconnect with a programmable bypass on source
failures. This signal can be used to drive a customer furnished relay,
or accessory 31Z for two (2) sets of double throw contacts rated 10
amperes at 220 volts AC, which is included as standard.
• Fully programmable engine exerciser with seven independent routines to
exercise the engine generator, with or without loads, on a daily,
weekly, bi-weekly or monthly basis.
• Closed transition transfer time delays include:
o In-synch time delay – adjustable from 0 to 3 s
o Failure to synchronize – adjustable from 1 to 5 m
o Extended parallel – adjustable from 0.1 to 1.0 s
• Delayed transition load disconnect time delay – adjustable from 0 to 5
minutes – disconnects the load for the set period of time between
power transfers (normal to emergency, or emergency to normal).
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ASCO 7000 Series Medium Voltage Transfer Switches
ASCO power products are designed to be the world’s most robust, intelligent and advanced power
transfer and control system with extensive diagnostic capabilities. The 7000 Series Medium Voltage
Transfer Switch is engineered to safely provide continuous power in the widest range of emergency
and standby power applications including industrial, commercial and business-critical facilities as well
as health care campuses.
ASCO 7000 Series Medium Voltage Transfer Switches - Catalog Number
A
7
Interrupting
Rating(1)
Product
Series
Operation
Transition Type Construction
Type
7
A Automatic
A
E
B
25kAIC
31.5kAIC
40kAIC
7000
Series
A
D
Blank
C
D
T
Open
T
Closed
Delayed
Transfer
C
C
0
Device
Type
Neutral
Code
GB/IEC MV 0
Dual CB
Transfer
Switch
None
3
1250
8
(3)
Poles Amperes(2) Voltage
Controller
3
0630
1250
2000
2500
3
4
6
8
V
2
O
3.3kV
6kV
6.6kV
10kV
11kV
22kV
Other
(1)
24kV class systems are only available in 25kAIC and 31.5kAIC configurations.
(2)
24kV class systems are only available in 1250A and 2000A configurations.
(3)
When the nominal system voltage is 3.3kV, 6kV or 6.6kV, the rated voltage of the switchgear is 7.2kV;
When the nominal system voltage is 10kV or 11kV, the rated voltage of the switchgear is 12kV;
When the nominal system voltage is 20kV or 22kV, the rated voltage of the switchgear is 24kV.
9
5
5
Grp5
X
L
Accessories
Enclosures
0
X
Z
None
L
Per Acc
Number
(See table)
Per Spec.
IP4X
ASCO 7000 Series Medium Voltage Transfer Switches- Accessories
Standard Accessory Code
Accessory Code
1G
18B/18G
Description
External 24VDC Auxiliary Power Connection
Contacts That Operate When Source Voltage Present (18G - Normal; 18B - Emergency)
30E
Load Shed Circuit
31Z
Selective Load Disconnect Circuit
Please list these standard accessory codes in the Catalog Number when ordering.
Optional Accessory Code
Accessory Code
72EE2
Description
ASCO Communications Module
73E
Lightning / Surge Protection On Emergency (Source 2)
73N
Lightning / Surge Protection On Normal (Source 1)
118RE
Protective Relay NR (NSR612F-DS) On Emergency
118RN
Protective Relay NR (NSR612F-DS) On Normal
118XE
Protective Relay XJ Electric (WGB-871) On Emergency
118XE1
Protective Relay XJ Electric (WGB-681A, with Differential Protection) On Emergency
118XN
Protective Relay XJ Electric (WGB-871) On Normal
135L
ASCO Power Meter On Load
139C1
CTs On Load (Required With 135L)
139C2
139C3
CTs On Normal & Emergency (Required With 118*N or*E)
CTs On Load, Normal, & Emergency (Required If 135L AND 118*N/*E)
139DT
PT Drawout Trucks In Breaker Sections (Set of 2) (Not available on 24kV class switchgear)
139GE
Grounding Switch On Emergency (Source 2)
139GL
Grounding Switch On Load
139GN
Grounding Switch On Normal (Source 1)
139V1
Change 220V Breaker Control Voltage to 110V
For more accessories, please contact local ASCO representative.
Lift Truck and Service Kits Sold Separately
Accessory P/N
Description
K734409-001
CB Lift Truck (for 800mm width switchgear)
K734409-002
CB Lift Truck (for 1000mm width switchgear)
A38180
Installation and operation tools (including handles and lubricant etc.)
10
Throughout your business cycles, from design to
post-installation service and support, ASCO provides
unparalleled assistance to navigate through each step
of the process and achieve your goals
TECHNOLOGY
ASCO commercialized the first power transfer switch in 1920. Today, ASCO is the world’s largest manufacturer of worldclass power transfer systems. ASCO innovation delivers more than 100 million kilowatts every day. Reliably.
Repeatedly.
ASCO innovations over the past century stand as milestones in power transfer technology.
ASCO Medium Voltage Power Transfer Switches optimize reliability and total cost of ownership. ASCO integrated systems
are the reference point for reliability, configurability and reduced maintenance requirements. Specify the exact medium
voltage transfer switch capabilities you need. With so much at stake, protect your facility’s Business-Critical Continuity™,
and your reputation.
SUPPORT
ASCO Support defines collaboration, comprising highly-skilled teams of factory-based and geographically
dispersed application engineers and project managers. Properly specifying medium voltage power transfer switches
demands a thorough understanding of a range of issues and challenges. A team assigned to your project will work with
you every step of the way, from design to commissioning, and post-installation service.
It’s our support that separates ASCO from the competition.
We will help you develop solutions that reduce installation costs, save time, improve operating efficiency, conserve utility
and maintenance costs, and provide complete life cycle management, including upgrades and retrofits.
SERVICE
ASCO provides service technicians, product specialists and engineers worldwide enable unparalleled assurance.
With over 450 Emerson and other factory trained and authorized service representatives, ASCO is sure to be nearby to
help you address your design, operational, and service challenges.
To select a manufacturer who provides continuous coverage for continuous power, contact your regional ASCO
representative or visit our website at: www.EmersonNetworkPower.com/ASCO
We are ready serve your needs 24 hours a day, 7 days a week.
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About Emerson Network Power
Emerson Network Power, a business of Emerson (NYSE:EMR), is the world’s leading provider of critical infrastructure technologies and life cycle services for
information and communications technology systems. With an expansive portfolio of intelligent, rapidly deployable hardware and software solutions for
power, thermal and infrastructure management, Emerson Network Power enables efficient, highly-available networks. Learn more at:
www.emersonnetworkpower.com
About Emerson
Emerson (NYSE: EMR), based in St. Louis, Missouri (USA), is a global leader in bringing technology and engineering together to provide innovative
solutions for customers in industrial, commercial, and consumer markets around the world. The company is comprised of five business segments: Process
Management, Industrial Automation, Network Power, Climate Technologies, and Commercial & Residential Solutions. Sales in fiscal 2015 were $22.3 billion.
For more information, visit:
www.emerson.com
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Legal statement: While every precaution has been taken to ensure accuracy and completeness herein, Emerson assumes no responsibility,
and disclaims all liability, for damages resulting from use of this information or for any errors or omissions. Specifications subject to change
without notice.
Emerson Network Power Co., Ltd.
Pre-sales hotline:
After-sales hotline:
Address: Block B2 Nanshan Park No.1001 Xueyuan
Road Nanshan Dist. Shenzhen, 518055 China
China Telephone: 86-755-86010808
Postcode: 518055
400-887-6526
400-887-6510
www.emersonnetwork.com.cn
Emerson Network Power, ASCO, the Emerson Network Power logo and ASCO logo are trademarks and service marks of Emerson Electric Co. ©2016 Emerson Electric Co.
E-X621****-0516
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