ASCO 7000 Series IEC Medium Voltage Power Transfer Switches

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The availability, quality and reliability of electrical power can

impact life, safety, productivity and financial success.

ASCO Power Technologies provides solutions to assure the

continuity of power, from the design stage to installation,

start-up and beyond: complete coverage for continuous

power.

ASCO products can transform what could be a major

catastrophe into complete assurance.

With a variety of configurations, options and transfer modes

including open, delayed, and closed, ASCO 7000 Series

Medium Voltage Power Transfer Switches deliver per

specifications and leverage industry leading switchgear per

the IEC 62271-200 standard for metal-enclosed switchgear

and controlgear.

ASCO 7000 Series IEC Medium Voltage Power Transfer Switches

Power Continuity for:

• Healthcare Facilities • Data Centers • Waste Water Treatment

• Telecom Exchanges • Chemical Industry • Retail Business Centers

• Industrial Complexes • Refineries • Other Mission Critical Facilities

Where Supply and Demand Connect

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Engineered For QualityFactory Testing On Every Assembly

An ASCO 7000 Series microprocessor-based controller

(Transfer Control Center) manages breaker operation to

transfer between critical loads and between power sources.

Comprising voltage classes of 7.2 kV, 12 kV and 24kV per

IEC standards, the Medium Voltage Transfer Switch may

be equipped with protective relays, power metering, and

Ethernet communications to meet installation requirements.

Additionally, custom engineered solutions per specifications

may also be accommodated. Switch mode options include

open transition, closed transition, and delayed transition.

All ASCO 7000 Medium Voltage Transfer Switches utilize

industry leading breaker technology and are approved with

internal arc classification IAC A FLR, loss of service continuity

category LSC 2B and partition class PM. This makes them

suitable for universal installation, meeting the highest

requirements regarding personal safety.

ASCO 7000 SERIES IEC Medium Voltage Power Transfer SwitchesIEC Class: 7.2kV, 12kV and 24kV; Up to 2500 Ampere

The Innovation of ASCO Medium Voltage Power Transfer Switches

Voltage Class

Rated Current(Amp)

Med Voltage TransferSwitch Dimensions

(mm) Remarks

Width * Depth Height

7.2kV or

12kV

6302400 1350 2200

Same For Fixed

or Draw Out PT1250

20002400 1970 2200 Fixed PT

2800 1350 2200 Draw Out PT

25002400 1970 2200 Fixed PT

2800 1350 2200 Draw Out PT

24kV1250 3000 1810 2855

Fixed PT only2000 3000 2448 2855

Voltage Class

Rated Current

Short Time Withstand Current(4 sec)

Peak Withstand Current

7.2kV or

12kV

630A

25 kA 63 kA1250A

2000A

2500A

630A

31.5kA 80kA1250A

2000A

2500A

24kV

1250A25kA 63kA

2000A

1250A31.5kA 80kA

2000A

The chart below provides an overview of the Short Time and

Peak Withstand ratings currently available.

Contact your local representative for availability of other

options.

* 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.

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ASCO 7000 SERIES Medium Voltage Power Transfer Switches (IEC)

The Medium Voltage Automatic Transfer Switch basic configuration comprises three modular vertical sections.

Key components and features include:

¾ASCO 7000 Series Transfer Control Center For Open Transition,

Closed Transition, Or Delayed Transition Operation

¾Use of maintenance-free vacuum circuit-breakers with optional Protective Relaying

• One (1) Normal Source VCB

• One (1) Emergency Source VCB

¾Two (2) Normal Source Fused Voltage Transformers (V/V)

¾Two (2) Emergency Source Fused Voltage Transformers (V/V)

¾Confinement of an internal arc to the respective compartment up to 40 kA (31.5kA for 24kV)

¾Standard 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

• 31Z Selective Load Disconnect circuit

• Strip Heaters For Temperature and Humidity Control

• Maintenance Lighting In Control and Rear Cable Compartments

¾Optional Protective Relay

¾Optional 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

ASCO Medium Voltage Power Transfer Switches arerated up to 24kV, with current capacities of 630 through 2500 amperes.

ASCO 7000 SERIES IEC Medium Voltage Power Transfer Switch

(Load Section Shown On Right)

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Medium Voltage Transfer Switch Specifications

Voltage 7.2 kV 12 kV 24kV

Nominal System Voltage 3.3kV 6kV 6.6kV 10kV 11kV 20kV 22kV

Ampacity Rating 630A,1250A,2000A,2500A 1250A,2000A

Number of Sections 3

IEC 62271-200 Yes

Arc Resistance IAC A FLR

Bottom Cable Entry Yes

Draw Out Circuit Breakers Yes

Automatic Shutters Yes

Grounded Barriers Yes

Powder Coated with Epoxy Resins

Yes

Enclosure Rating IP4X

Integrated Mimic Diagram Yes

Standard Color RAL 7035

Protective Relays Optional

Ethernet/Serial Communications

Optional

Power Metering Optional

Transfer Switch Controller

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.

Circuit Breakers

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.

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

Internal arc classified switchgear according to IAC AFLR; front, lateral and rear accessibility for all short circuit currents and an arc duration of 1s.

IEC Standard GB Standard

SwitchgearIEC 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 -

Degree of Protection IEC 60 529 GB/T 4208

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

Overview of Standards

Instrument Transformers

Instrument transformers include Current Transformers (CT) and Voltage Transformers (VT, a.k.a. Potential Transformers - PT) to measure circuit voltage and current.

Controlgear Assembly

The controlgear assembly is air-insulated, type-tested, metal-enclosed 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.

At the Crossroads of Performance and Simplicity

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Open 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.

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 Transfer Switching

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.

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, user-supervised operation in non-automatic mode.

Breaker Control Switch

Allows the operator to trip the breaker in any control mode

Allows the operator to close the breaker in manual mode with interlock protection

“Trip”, “Close”, and “NAT/NAC” positions.

Mode Selector Switch

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.

Indicator LED

NAC (Normal After Close) Red

NAT (Normal After Trip) Green

Transition Options and Control ModesTransition Options and Control Modes

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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.

Communication and Connectivity Capabilities

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.

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:

• PowerQuest Critical Power Management System (CPMS)

• Digital metering: current, voltage, power, power factor, frequency

• Discrete indicator lights for status and control information at a glance

Options and Specified Components

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.

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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 Microprocessor Controller

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 Transfer Control Center

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ASCO 7000 Series Transfer Control Center - FeaturesDigital 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 systemstatus 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

• Under- and over-voltage settings on normal and emergency sources.

• Under- and over-frequency settings on normal and emergency.

• True RMS voltage sensing with +/- 1% accuracy.

• Frequency sensing with +/- 0.2% accuracy.

• Phase sequence sensing for phase sensitive loads.

• Voltage unbalance detection between phases.

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.

Time Delays

• Engine start time delay – adjustable from 0 to 6 seconds – delays engine starting signal to override momentary normal source loss.

• Transfer to emergency time delay – adjustable from 0 to 60 minutes.

• Emergency source stabilization time delay – adjustable from 0 to 6 seconds – ignores momentary transients during initial generator set loading.

• 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

• 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 - Catalog Number

ASCO 7000 Series Medium Voltage Transfer SwitchesASCO 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.

A 7 A D T C 0 3 1250 8 5 X L

Interrupting Rating(1)

Product Series

Operation Type

Transition Type ConstructionDevice

TypeNeutral

CodePoles Amperes(2) Voltage(3) Controller Accessories Enclosures

AEB

25kAIC31.5kAIC

40kAIC

7 7000Series

A Automatic BlankCD

OpenClosed

Delayed

T Transfer C GB/IEC MVDual CBTransferSwitch

0 None 3 0630125020002500

3468V2O

3.3kV6kV

6.6kV10kV11kV22kVOther

5 Grp5 0X

Z

NonePer Acc

Number(See table)Per Spec.

L IP4X

(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.

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ASCO 7000 Series Medium Voltage Transfer Switches- AccessoriesStandard Accessory Code

Accessory Code Description1G External 24VDC Auxiliary Power Connection

18B/18G 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 CodeAccessory Code Description

72EE2 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 CTs On Normal & Emergency (Required With 118*N or*E)

139C3 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 SeparatelyAccessory 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.)

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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

SUPPORT

SERVICE

ASCO commercialized the first power transfer switch in 1920. Today, ASCO is the world’s largest manufacturer of world-class 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.

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.

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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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

About Emerson Network PowerEmerson 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

www.emersonnetwork.com.cn

Pre-sales hotline:

400-887-6526After-sales hotline:

400-887-6510

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.

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