Download Medium voltage metal enclosed withdrawable

Eaton Industries (Netherlands) B.V.
Europalaan 202, 7559 SC Hengelo
Postbus / P.O. Box 23, 7550 AA Hengelo
The Netherlands
tel.: +31 (0)74 246 9111
fax: +31 (0)74 246 4444
Consultant Specification
Medium voltage metal enclosed
withdrawable switchgear
Datacenter application
MV connection to the grid
Page 1 of 11
Version 1.1 march 2012
GENERAL
1.01
Scope
A. The Contractor shall furnish and install medium voltage metal-enclosed indoor withdrawable
vacuum circuit breaker switchgear equipment as specified herein and as shown on the
contract drawings. Unless otherwise shown on the contract drawings the switchgear shall be
front accessible such that it can be installed against the wall and shall not require rear
access for its maintenance, inspection, or operation. Cable access shall be from below.
B. Only Air Insulated Switchgear and vacuum circuit breakers are acceptable. The use of SF6
is not permitted.
1.02
Related Sections
A. Contract Drawings
B. Project Data Sheets
1.03
References
A. The medium voltage metal-enclosed switchgear and all components shall be designed,
manufactured and tested in accordance with the latest applicable IEC standards as follows:
IEC62271-1
IEC62271-100
IEC62271-102
IEC62271-106
IEC62271-200
IEC60529
IEC60044-1
IEC60044-2
IEC60282
IEC 60051
IEC 60417
IEC 60470
IEC 60644
IEC 60529
1.04
Common specifications for high-voltage switchgear and
controlgear standards
High-voltage alternating-current circuit-breakers
Alternating current disconnectors and earthing switches
High-voltage alternating current contactors
A.C. metal-enclosed switchgear and controlgear for rated
voltages above 1 kV and up to and including 52 kV
Degrees of protection provided by enclosures
Instrument transformers - Part 1: Current transformers
Instrument transformers - Part 2: Inductive voltage transformers
High-voltage fuses
Direct acting indicating analogue electrical measuring
instruments and their accessories - All Parts
Graphical symbols for use on equipment
High-voltage alternating current contactors and contactor-based
motor-starters
High-voltage fuse-links for motor circuit applications
Degrees of protection provided by enclosures
Submittals – for Tender Review/Approval
A. With the Tender/Bid the following information shall be supplied:
1. Copy of the Type Test Certificate to confirm compliance with IEC 62271-200 for the
switchgear and IEC 62271-100 for the vacuum circuit breaker. This shall be from an
accredited, internationally recognized, third party laboratory, self-certification is
unacceptable. Acceptable laboratories are:
1. CESI, Milan, Italy
2. KEMA, The Netherlands
3. IPH, Berlin, Germany
2. Front view elevation drawing
3. Floor plan
4. Single Line drawing
5. Full equipment list and specification of each individual section of the MV Switchgear.
6. Product data sheet and or catalogue
Page 2 of 11
Version 1.1 march 2012
B. After the placement of an order, the following information shall be submitted to the Engineer
for approval:
1. Master drawing register
2. Front view elevation
3. Floor plan
4. Top view
5. Single line
6. Schematic diagram
7. Nameplate schedule
8. Component list
9. Conduit entry/exit locations
10. Assembly ratings including:
a. Short-circuit rating
b. Voltage
c. Continuous current
d. Basic Impulse Level
e. Internal Arc Classification
11. Major component ratings including:
a. Voltage
b. Continuous current
c. Interrupting ratings
12. Cable terminal sizes
13. Product data sheets.
C. Where applicable the following additional information shall be submitted to the Engineer:
1. Busway connection
2. Connection details between close-coupled assemblies
3. Composite floor plan of close-coupled assemblies
4. Electrical Schematic diagram
5. Key interlock scheme drawing and sequence of operations
6. Descriptive bulletins
7. Product data sheets
8. Installation recommendations for arc channel.
1.05
Submittals – for CONSTRUCTION
A. The following information shall be submitted for record purposes:
1. Final as-built drawings and information for items listed in paragraph 1.04
2. Wiring diagrams
3. Routine Test reports
4. Installation information including equipment anchorage provisions
5. Installation and Maintenance Manual
1.06
Qualifications
A. The manufacturer of the switchgear shall also be the manufacturer of the vacuum circuit
breaker used within the assembly.
B. For the equipment specified herein, the manufacturer shall be ISO 9000:2000, 9001 or 9002
certified.
C. The manufacturer of this equipment shall have produced medium voltage metal-enclosed
switchgear equipment for similar functions for a minimum period of five (5) years. When
requested by the Engineer, an acceptable list of installations with similar equipment shall be
provided demonstrating compliance with this requirement.
1.07
Regulatory Requirements
A. Compliance with IEC 62271-100 and IEC 62271-200.
B. Compliance with any local utility requirements.
Page 3 of 11
Version 1.1 march 2012
1.08
Delivery, storage and handling
A. Each switchgear assembly shall be split into shipping groups for handling as indicated on the
drawings or per the manufacturer’s recommendations. All draw out elements must be
shipped installed in their respective compartments. If any parts or restraints are added for
shipping, those parts must be clearly identified. Clear instructions shall be included as to
when and how those parts/restraints are to be removed during the installation. Any special
cautions and care to be exercised prior to opening the packaging shall be noted outside the
packaging. Shipping groups shall be suitable for shipment by truck, rail or ship. Shipping
groups shall be bolted to skids and suitable for loading, unloading, and handling with a fork
truck. Each shipping group shall be equipped with lifting provisions for handling by crane.
Accessories shall be packaged and shipped separately.
B. Equipment unloading, handling, storage, and installation instructions shall be included with
the packaging in such a manner that it can be easily located and accessed before unloading
the equipment.
C. Equipment shall be handled and stored in accordance with manufacturer’s instructions.
1.09
Operation and Maintenance Manuals
A. Equipment operation and maintenance manuals shall be provided with each assembly
shipped, and shall include instruction leaflets and instruction bulletins for the complete
assembly and each major component.
PART 1
1.01
Products
Manufacturers
B. Eaton Electrical
C. ___________
D. ___________
The listing of specific manufacturers above does not imply acceptance of their products that do
not meet the specified ratings, features and functions. To eliminate possible disputes between
circuit breaker and switchgear coordination, the manufacturer of the switchgear shall also be the
manufacturer of the circuit breaker. Manufacturers listed above are not relieved from meeting
these specifications in their entirety. Products in compliance with the specification and
manufactured by others not named will be considered only if pre-approved by the Engineer ten
(10) days prior to bid date.
1.02
Switchgear and circuit breaker details
A. The switchgear described in this specification shall be designed for operation on Medium
Voltage supply up to and including 24 kV 50/60 Hz. Specific voltage rating is shown on the
contract drawings and the Project Data Sheets.
B. The switchgear main bus (when applicable) shall be rated at 1250 / 2000 / 2500 / 3150 /
4000 A as listed on the drawings. Busbars at 4000 A can have fan assisted cooling. All
busbars are to be insulated either by heat shrink sleeves or by application of an epoxy
coating. Busbars shall be continuously rated over their entire length.
C. The switchgear shall be constructed so that all busbars, bus supports and connections shall
withstand stresses that would be produced by fault currents equal to the close and latch
rating of the circuit breakers. The short circuit current withstand capability of the switchgear
busbars and vacuum circuit breaker shall be for duration of 3 seconds. The actual rating of
the required short circuit withstand shall be on the contract drawings but shall be either:
25 kA-3 s; 31.5 kA – 3 s; 40 kA – 3 s; 50 kA - 3s for 12 kV and 17.5 kV systems and
20 kA-3s; 25 kA- 3 s for 24 kV systems.
D. Where shown on the contract drawings integral earth switches shall be provided for each
cable circuit. The earth switch shall have the same short circuit rating as the main bus with
the following exception: If a 50 kA-3s rating is required then the earth switch will be rated at
50 kA-1s. Earthing switches shall be of the fault making type. Earthing switches can be
mounted in the cable compartment for cable earthing, in a special busbar earthing panel or
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Version 1.1 march 2012
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1.03
on a busbar earthing truck for busbar earthing. Optionally the earthing switch can be
provided with a locking coil which prevents operation at de-energised coil.
Internal Arc Classification testing shall have been carried out on all ratings and shall be
confirmed by Reports of Performance by a third party certification laboratory. A copy of
which shall be provided with the tender document. The rating of the internal arc shall match
the short circuit withstand rating of the busbars but for a duration of 1 second for 25kA,
31.5 kA, 40 kA, and for 0.5 s for 50 kA rated systems. Internal Arc testing shall be carried
out in the 3 main compartments of the Switchgear – Cable Compartment, Vacuum Circuit
Breaker Compartment and Busbar Compartment. The propagation of the fault to adjacent
compartments or sections of the switchgear shall not be permitted.
Segregation barriers shall be provided between the busbar compartments of adjacent
vertical sections.
The temperature rise of the switchgear assembly shall be in accordance with IEC 62271-200
and for the vacuum circuit breaker IEC 62271-100 and be proven and documented by type
tests. Test certificates shall be submitted with the tender.
Current transformers are cast-resin insulated and comply with IEC60044-1.Current
transformers shall be mounted in the cable compartment near the cable terminals. The
secondary circuit is to be wired up to terminals in the low voltage compartment. The low
voltage cabling shall be fully segregated from any primary voltage by earth metal
partitions/channels, short distances of low voltage cables are permitted to run in non-metalic
conduit for example secondary wiring from CTs. Earthing and short-circuiting the current
transformer circuits shall be done in the low voltage compartment. Where shown on the
Project Data Sheets it is permissible to use Low Voltage wire wound CTs provided adequate
provision is made for screening and earthing the CT primary conductor.
All secondary wiring from the CTs shall be terminated in the Low Voltage compartment
where they will be provided with shorting links.
Voltage transformers are cast-resin insulated and can be mounted on the following ways:
1. In the cable compartment near the cable terminals, direct connected, for measuring the
cable voltage. Connection shall be via removable high voltage fuses.
2. On the withdrawable voltage measuring truck, direct connected, for measuring the
busbar voltage. Connection shall be via high voltage fuses mounted on the measuring
truck.
3. In the cable compartment, with high voltage flexible connection cables to the Busbar
Compartment to measure busbar voltage. Connection shall be via removable high
voltage fuses.
Loss of Service Continuity classification: LSC-2B
Partition Class: PM (all partitions without exception shall be earthed metal)
Internal Arc Class: AFLR
Accessibility of Compartments:
1. Busbar Compartment – Tool-Based / Non-Accessible
2. Vacuum Circuit Breaker Compartment – Interlock Controlled
3. Cabling Compartment – Procedure-Based / Tool-Based
Ingress Protection Degree in accordance with IEC 60529:
1. External degree of protection: IP4X
2. Internal degree of protection: IP2X
Indoor switchgear suitable for operation in -5 to +40 0C with relative humidity not exceeding
95% in any 24 hour period.
The switchgear shall be rated for operation at altitudes of up to 1000m without derating.
Interlocks and safety measures
A. Vacuum Circuit Breaker Compartment shutters
1. Partitions and shutters protection shall be IP 2X
2. Automatic safety shutters shall cover the circuit breaker fixed isolating contacts
3. Shutters shall be individually operated by direct action of the circuit breaker
withdrawable carriage.
4. Shutters shall be opened and closed by a positive mechanical drive.
5. Facilities shall be provided to padlock shutters closed.
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Version 1.1 march 2012
6. Means shall be provided to facilitate cable testing via the fixed isolating contacts by
holding the cable side shutters open. .
7. Shutters shall be coloured and labelled.
a. Live Side: (Busbar & Cable for incoming circuits) Red and labelled “Danger Live”
b. Cable Side: Yellow and labelled “Cable”
c. On Bus-Section panels both shutters shall be Red and labelled “Danger Live
Busbars”
B. Mechanical interlocks shall be provided to prevent the following:
1. It shall not be possible to rack the breaker in or out if the breaker is “CLOSED”. The
vacuum circuit breaker should ‘OPEN’ automatically if the racking in or out procedure is
attempted.
2. It shall not be possible to close the circuit breaker manually or electrically while it is
being racked in or out or while the breaker is in any position between the connected and
the test/disconnected positions.
3. The door of the vacuum circuit breaker compartment being opened unless the vacuum
circuit breaker is in the ‘TEST’ (withdrawn) position.
4. Vacuum circuit breaker being ‘Racked In’ unless the compartment door is closed and the
vacuum circuit breaker is OPEN.
5. Secondary contact plugs and socket shall not be able to be unplugged unless the
vacuum circuit breaker is in the ‘TEST’ position.
6. It shall not be possible to insert the circuit breaker into the connected position if the
circuit breaker control wiring connector is not properly engaged with its compartment
control wiring connector. Interlocking shall also be provided to prevent disconnection of
circuit breaker control wiring connector (manually or automatically) while the circuit
breaker is in the connected position or in any position between the connected and the
test/disconnected.
C. Padlock facilities shall be provided for the following:
1. Safety shutters closed (separate facility for busbar and circuit shutters)
2. Earthing switches closed
1.04
Construction
A. The switchgear assembly shall consist of completely metal-enclosed, dead front vertical
sections requiring only front access for connection, maintenance and operation of the
switchgear and containing various combinations of circuit breakers and auxiliaries of rating
and type noted on the drawings or specified herein.
B. The switchgear shall be constructed from a minimum of 2mm galvanised sheet steel with
pre-treatment and polyester powder paint finish as per the manufacturer’s standard colour.
C. The front of each panel, and the end covers of each switchboard shall be finished with a
polyester powder coat, where the thermosetting powder is applied to the sheet steel
electrostatically with an average layer of minimum fifty micrometers. Before the powder
coating is applied, the sheet steel parts shall be degreased and coated with a phosphate
layer with 0.4 to 0.8 g/m² iron phosphate.
1. The technical data for the powder coating will be:
a. base
: epoxy polyester resin
b. colour
: RAL7035/RAL7016
c. degree of shine
: 60 à 70% according to Lange 60 degrees
d. sg
: 1.53 g/cm³
e. adhesion
: glass test DIN53151 (Gto)
f. elasticity
: buckling test DIN53156
g. salt spray test
: ASTM 400 hours
D. Unless otherwise stated on the Contract Drawings or Project Data Sheet, the switchgear
shall be front accessible such that it can be installed against the wall, and shall not require
rear access for its maintenance, inspection, or operation. Primary bus joints and supports
that are not accessible from the front are to be designed such that no maintenance is
necessary for those joints or supports. All necessary access for owner’s primary cable
terminations, joining of main and ground bus joints at shipping splits, and termination of
control wires shall be provided from the front or top of the switchgear.
Page 6 of 11 Version 1.1 march 2012
E. Access to any medium-voltage cable or bus connection shall be through removable panels
requiring the use of tools and shall be marked with caution signs to indicate the presence of
energized conductors behind them.
F. All low voltage devices and their associated control wiring shall be isolated by grounded
metal barriers from primary circuits with the exception of short lengths of wires such as at
instrument transformer and space heater terminals. Space heaters shall be supplied when
noted on the drawings or specified herein.
G. Each circuit breaker shall have two positions within its compartment, with compartment door
closed: ‘TEST’ and ‘CONNECTED’.
1. In the ‘TEST’ position, no primary high voltage contacts shall be made and the safety
shutters automatically close over the stationary high voltage contacts in the
compartment. The secondary control wiring can remain connected so that the breaker
can be opened or closed electrically or manually.
2. In the ‘CONNECTED’ position, the circuit breaker shall be in the normal operating
position inside the compartment, with safety shutters fully opened, and primary and
secondary connections fully made.
3. Two cell position switches shall be provided in each circuit breaker compartment. One
switch shall change its state when breaker is moved to connected position, and the other
switch shall change its state when breaker is moved to test position to provide remote
indication of the position of the vacuum circuit breaker.
4. Where shown on the Project Data Sheet the vacuum circuit breaker shall have the
provision for remote racking by motor mechanism to and from the ‘TEST’ and
‘CONNECTED’ positions.
5. It shall be possible to manually OPEN and CLOSE the vacuum circuit breaker with the
compartment door closed. Manually charging the spring charging mechanism shall only
be possible with the vacuum circuit breaker in the ‘TEST’ position and the compartment
door open.
1.05
Vacuum Circuit Breaker
A. Circuit breakers shall utilize vacuum interrupters for interruption and switching functions.
Each vacuum interrupter shall be totally encapsulated in epoxy insulation forming a
composite encapsulated pole unit. The vacuum interrupter shall be cast into the epoxy pole
unit as part of an integrated manufacturing process, bolting of a separate loose vacuum
interrupter into the epoxy housing is not permitted. Three identical pole units will be proved
for each vacuum circuit breaker. The current transfer between the circuit breaker and
primary circuits conductors in the compartment shall be via heavily silver plated and spring
loaded copper finger cluster (primary disconnect) on the breaker, and rigidly mounted silver
plated copper stabs within the insulated housing mounted on the compartment wall.
B. Each circuit breaker shall be equipped with high-speed stored energy operating mechanism
and shall permit open-close-open (OCO) operating sequence without recharging the closing
springs. The operating sequence will be O-0.3s-CO-15s-CO. The type test certificate of the
vacuum circuit breaker shall be submitted to confirm this requirement.
C. The breaker front panel shall be removable when the compartment door is open for ease of
inspection and maintenance of the mechanism.
D. Each circuit breaker shall be equipped with mechanical operations counter on the front of the
breaker to provide record of the number of circuit breaker operations.
E. Each circuit breaker shall include mechanical flag indicators for Open/Close and spring
Charged/Discharged status indications on the front of the breaker.
F. Each circuit breaker shall include auxiliary contacts to provide remote indication of ‘Spring
Charged’ status.
G. Each circuit breaker shall be supplied with an auxiliary switch with 5 NO and 5 NC contacts.
The switch shall be heavy duty, double break type with wipe type contacts. All unused
contacts from this switch shall be wired out to terminal blocks for owner’s use. Where shown
on the Contract Drawings and needed for the control of the system it shall be possible to add
an additional 5 NO and 5NC contacts to each circuit breaker.
H. Circuit breakers shall be manually operated (MO) unless shown on the drawings as
electrically operated (EO). Energy required for closing and opening of the circuit breaker
Page 7 of 11
Version 1.1 march 2012
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J.
shall be provided by manual charging of springs. The spring charging handle shall be
integral to the breaker and conveniently located on the front of the circuit breaker.
Each circuit breaker shall be supplied with Manual “ON” and “OFF” push buttons located on
the front of the circuit breaker for opening and closing the breaker manually, without a need
for external control power.
Where indicated on the drawings as EO, each circuit breaker shall be electrically operated.
Energy required for closing and opening of the circuit breaker shall be provided by charging
of springs by an electrical motor. Electrical closing/opening of the circuit breaker shall be
accomplished by energizing spring release coil/shunt trip coil. The control voltage required
for electrical operation of the breakers shall be derived from an external source unless
otherwise stated the voltage rating will be shown on the contract drawings and or the Project
Data Sheets.
Page 8 of 11
Version 1.1 march 2012
Data Sheet for withdrawable MV Switchgear
Tag Number:
Swbd Title:
Client:
Site:
Environmental Conditions
Location: Indoor
Ambient Temp: -5 to + 40OC
Humidity: 95% max
Hazardous Area: Non-Hazardous
Particulars of Equipment - General Data
Switchgear Specification / Standard Compliance
Type
System Voltage
Rated Frequency
Number of Phases
Rated lightning impulse withstand voltage
Dielectric withstand voltage to earth &
between phases
System rated short time withstand current
System rated peak withstand current
Earth Switch short time withstand current
Loss of Service Continuity
Partition Class
Internal Arc Classification
Internal Arc Rating
Accessibility of Compartments
Cable Compartment
Circuit Breaker Compartment
Busbar Compartment
Rated normal Busbar current
Individual phase insulated Busbars
Individual Section Busbar compartment
segregation
Future Busbar extension
Ingress Protection (IP Classification)
Power System
Supply Volts: 12 kV
Frequency: 50 Hz
BIL (kV): 75 kV
Earthing: Low resistance earthing
Units
kV
Hz
kV peak
kV (1min)
kA – 3s
kA
kA – 3s
LSC
kA-1s
A
IP
Circuit Breaker Specification / Standard
Compliance
Circuit Breaker Type
Individual Phase Switching
Racking in Mechanism
Operating Sequence
Control Circuit Supply Voltage
Mechanical Endurance
Electrical Endurance
Capacitance Switching
Page 9 of 11
Version 1.1 march 2012
Requirements
IEC 62271-200
Air Insulated – Metal Enclosed
12
50
3
75
28
[25] / [31.5] / [40]
[66] / [80] / [100]
[25] / [26.3] / [31.5] / [40]
2B
PM
AFLR
[25] / [31.5] / [40]
Tool-based] / Procedure-based
Interlock-controlled / [Tool-based
Non-accessible
[1250], [2000], [2500], [3150], [4000]
Yes
Yes
Yes from either or both ends
IP4X External and IP2X Internal
IEC 62271-100
V
Vacuum only
Encapsulated Pole Unit with integral cast
Vacuum Interrupter
Manual / Electrical Operation
O-0.3s-CO-15s-CO
110 / 120 / 220 / 240 VAC / 50 / 60 HZ,
24 / 48 / 60 VDC, 110 / 125 VDC,
220 / 250 VDC
M2
E2
C1 (C2 for 400 A multi-bank capacitor
switching
Data Sheet withdrawable for MV Switchgear
Specific Switchgear Details
Qty
Rating
Main Incoming Vacuum Circuit Breaker
[630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A]
Section
/ [2000 A] / [2500 A] / [3150 A] / [4000 A]
Cable Voltage Detection System
[Yes] / [No]
Incoming Cable-side Voltage Transformer
[Yes] / [No]
Protection Class CTs
[Yes] / [No]
Metering Class CTs
[Yes] / [No]
Cable-side Earth Switch
[Yes] / [No]
Manual or Electrically Operated Breaker
[Manual] / [Electrical] (insert voltage)
Motor Operated Remote Racking Mechanism
[No] / [Yes] (insert motor voltage)
Cell Breaker Position Switches
4A / 4B
[Yes] / [No]
Breaker Spring Charge Status Switches wired
[Yes] / [No]
to terminals in LV Compartment
Breaker Auxiliary Contacts wired to terminals
5A / 5B
[Yes] / [No]
Protection Requirements
Bus-Section (bus-tie) with Riser
Busbar Earth Switch
Busbar Voltage Transformer
Manual or Electrically Operated Breaker
Motor Operated Remote Racking Mechanism
Cell Breaker Position Switches
Breaker Spring Charge Status Switches wired
to terminals in LV Compartment
Breaker Auxiliary Contacts wired to terminals
Riser Accessories
Riser on Left or Right of Sectionaliser
Riser – Disconnect Truck
Riser – Earthing Truck
Riser – Voltage Transformer Truck
[630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A] /
[2000 A] / [2500 A] / [3150 A] / [4000 A]
4A / 4B
5A / 5B
Feeder Vacuum Circuit Breaker Section
Page 10 of 11
Version 1.1 march 2012
[Yes] / [No]
Right / Left
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
Feeder Vacuum Circuit Breaker Section
Cable Voltage Detection System
Incoming Cable-side Voltage Transformer
Protection Class CTs
Metering Class CTs
Cable-side Earth Switch
Manual or Electrically Operated Breaker
Motor Operated Remote Racking Mechanism
Cell Breaker Position Switches
Breaker Spring Charge Status Switches wired
to terminals in LV Compartment
Breaker Auxiliary Contacts wired to terminals
Protection Requirements
Manual / Electrical (insert voltage)
[No] / [Yes] (insert motor voltage)
[Yes] / [No]
[Yes] / [No]
4A / 4B
5A / 5B
630 A] / [800 A] / [1000 A] / [1250 A] /
[1600 A] / [2000 A] / [2500 A] / [3150 A] / [4000
A]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Manual] / [Electrical] (insert voltage)
No / Yes (insert motor voltage)
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[ 630 A] / [800 A] / [1000 A] / [1250 A] / {1600 A]
/ [2000 A] / [2500 A] / [3150 A] / [4000 A]
Cable Voltage Detection System
Incoming Cable-side Voltage Transformer
Protection Class CTs
Metering Class CTs
Cable-side Earth Switch
Manual or Electrically Operated Breaker
Motor Operated Remote Racking Mechanism
Cell Breaker Position Switches
Additional Breaker Auxiliary Contacts wired to
terminals
Protection Requirements
4A / 4B
5A / 5B
Feeder Vacuum Circuit Breaker Section
Cable Voltage Detection System
Incoming Cable-side Voltage Transformer
Protection Class CTs
Metering Class CTs
Cable-side Earth Switch
Manual or Electrically Operated Breaker
Motor Operated Remote Racking Mechanism
Cell Breaker Position Switches
Breaker Spring Charge Status Switches wired
to terminals in LV Compartment
Breaker Auxiliary Contacts wired to terminals
Protection Requirements
Page 11 of 11
Version 1.1 march 2012
4A / 4B
5A / 5B
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Manual] / [Electrical] (insert voltage)
[No] / [Yes] (insert motor voltage)
[Yes] / [No]
[Yes] / [No]
[630 A] / [800 A] / [1000 A] / [1250 A] / [1600 A] /
[2000 A] / [2500 A] / [3150 A] / [4000 A]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]
[Manual] / [Electrical] (insert voltage)
[No] / [Yes] (insert motor voltage)
[Yes] / [No]
[Yes] / [No]
[Yes] / [No]