MEDIUM VOLTAGE CE-B METAL CLAD · PDF fileMEDIUM VOLTAGE CE-B METAL CLAD SWITCHBOARDS...

CE-B-C-en-REV.04 2016.1

MEDIUM VOLTAGE CE-B METAL CLAD

SWITCHBOARDS

CE - B - C - en - REV.00 2015.6 32

MEDIUM VOLTAGE CE-B METAL CLADSWITCHBOARDS

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CA

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CE-B Metal Clad switchboards

family are designed for use in public

and industrial distribution system

up to 40,5kV for the operation and

protection of lines, generators,

transformers, motors, capacitor

banks. The switchboards are

composed combining the various

typical standard cubicles.

IEC 62271-200 International standard

IEC 60-298 (replaced by IEC 62271-200)

DPR 547 Italian accident prevention Standard

IEC 60129 Earthing switches

IEC 60694 High voltage switchgear

IEC 62271-1

IEC 62271 - 100 Circuit breakers

IEEE C37.013 Generator breakers

IEEE C37.04 - C37.06 - C37.09 Circuit breakers

UL / CSA field evaluation on request.

These switchboards have performed all relevant

type tests carried out by qualified laboratories.

Utilities and Power Plants• Power Stations

• Generator switchgear

• Transformer stations

• Main and auxiliary switchboards

Industry• Metallurgy

• Pulp and Paper

• Cement

• Chemical

• Rolling mills

• Automotive

• Petrochemical

• Oil and gas

Marine applications• Drilling platforms

• Off-shore oil rigs

• Ferries and ships

Services• Hospitals

• Infrastructures

• Data center

Transports• Airports

• Ports

• Railways

TY

PIC

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The company is qualified to supply standard ENEL type units.


CE - B - C - en - REV.00 2015.6

General CharacteristicsAccording to the international standard IEC 62271-200

the CE-B switchboards are classified for “loss of service

continuity category” as LSC2B.

The optional version CE-BA is foreseen fully withstanding to

internal arc fault:

• Internal arc classification (IAC)

• Accessibility type:

A (restricted to authorized personnel only)

F (Front)

L (Lateral)

R ( Rear)

Mechanical characteristicsEnclosure: Under normal operation the degree of protection

is of IP 31 for metal enclosure and IP2X in the LV instrument

compartment.

The individual structures are made of die-bended galvanized

sheet steel elements of no less than 2 mm thickness.

The external coloured panels are realized with carbon steel

painted with electrostatic epoxy powder, the standard

colour is light grey RAL 7035 smooth (all RAL scale colours

or specific colours can be realized on request). Standard

painting minimum thickness of 60 +/- 10 microns is

guaranteed.

Structure: all structural parts are solidly fastened together by

special screws ensuring a good electrical contact between

the connected parts.

Nuts and bolts used to assemble structure and enclosure

are galvanized and passivated with minimum thickness of

12 microns.

Earthing Circuit-breaker: earthing of circuit-breaker is ensured on

the whole isolating stroke by means of a sliding jaw type

contact on the copper conductor which is directly connected

with the earthing bus-bar.

Components: all main components such as CTs, VTs, etc.,

are positively earthed.

Doors: are connected to the frame by a 25 mmq. cross

section flexible braids.

Earthing bus-bar: the earthing bus-bar in copper with a

normal 350 mmq. cross section runs along the length of the

switchboard, thus ensuring maximum safety for personnel

and equipment.

Access and limited overall dimensions: the overall dimensions are particularly restricted if compared

with the high performances achieved for the insulation level,

rated busbars current and short-circuit current.

Optionally only front access could be required for installation

and maintenance.

Versatility and flexibility: any single line

diagram can be realized to meet the most various technical

requirements. Special and customized adaptation units

allow easy extension of existing switchboards even supplied

by other manifacturers or not yet in production.

Maximum service reliability: reinforced

insulation of all live parts minimizes the occurrence of faults

between phases or to earth. The various compartments of

each cubicle are fully segregated and can, besides, be simply

and rapidly inspected. As a matter of fact, equipment such as

circuit-breakers, instrument transformers and terminals are

readily accessible for inspection and maintenance purposes.

Easy inspection and maintenance: through easy access to the equipment in the various

compartments by hinged doors or removable bolted panels

and through the isolation and withdrawal on truck of circuit-

breakers, VT, fuses.

Easy installation and connection: the

cubicles are factory assembled and tested before being

shipped to site, therefore they only need to be secured to the

floor, coupled together and connected to the external circuits.

Personnel safety ensured by:

• positive earthing on the entire switchboard structure

• earthing of circuit-breaker frame throughout racking-in or

withdrawing operations;

• metal shutters automatically operated during circuit

breaker truck movement;

• metal shutters automatically operated during VTs truck movement

if foreseen Optional ;

• insulating protections and coatings are available for live

parts;

• easy access to low voltage apparatus and control wirings

without any risk of accidental contact with medium voltage

parts;

• set of mechanical and electromechanical interlocks;

• various signalling and control devices.

No fire risk: metal partitions of compartments and use

of self-estinguishing insulating material prevent fires from spreading.

Normal Service Conditions:• Maximum ambient temperature C° +40

• Minimum ambient temperature C° -5

• Height m a.s.l. ≤ 1000

• Maximum relative humidity % 95

Standard routine factory tests:• Visual inspection and check.

• Mechanical sequence operations.

• Wiring check.

• Electrical sequence operations.

• Insulation and Dielectric Tests.

FEATURES

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CE - B - C - en - REV.00 2015.6

A Instrument compartmentAll the low voltage equipment can be housed in the instrument

compartment, which is usually placed above the circuit-

breaker compartment

B Circuit-breaker compartmentThis compartment is designed to accommodate the circuit-

breaker, contactor or link complete of its withdrawable truck

and all mechanical parts required for the extraction.

The device is provided with auxiliary switches for signalling

the “connected position” and “disconnected/test position”.

C Feeder compartmentThe feeder compartment, accessible from the rear of the

cubicle by removing the panel or by opening the eventual door.

D Busbar compartmentThis compartment contains the main bus-bars which are

directly supported by the lower fixed isolating contacts of the

circuit-breakers and isolator supports fixed on the structure.

E Wiring duct for interconnectionsOn the cubicle roof front side, a wiring duct is provided to hold the

auxiliary connections between the various cubicles and towards

the external installation.

F Voltage transformer compartment (VT compartment)This compartment can contain the VTs and related fuses, it

can be provided in fixed or drawout version.

The drawout compartment version, allows an easy

replacement , with the switchboard out of service.

The optional version of drawout compartment, is equipped

with insulated bushing and shutter from feeder compartment

and this, it allows the replacement of VTs and fuses in safety

condition even with the switchboard in service.

This compartment can be provided on all unit configuration

CONSTRUCTION SAFETY INTERLOCKS

(incoming, outgoing and bus tie).

The drawer could be provided with auxiliary end switches for

signalling the position of drawer, extracted / inserted

G Earthing switchThe unit can be equipped with Casagrande Elettrocostruzioni

“CE-SEZ” earthing switch. The switch is activated with an high

speed rotating snap, sized to conduct the rated short circuit

making current when close to under load. The speed of the

snap action closing operation is independent of controls.

A manual switch operating lever is provided on the front of the switchbord.

The device is provided with auxiliary switches for signalling the

open and closed positions.

H Gas exhaust duct (Optional)The gas exhaust duct, positioned on the top of the cubicles,

collects and ejects outside the safety area the gas resulting by

the eventual internal arc fault.

Earthing switch• Mechanical key lock to prevent the earthing switch closing

if the circuit-breaker is in connected position

On the circuit-breaker• Mechanical lock to prevent the connection or disconnection

of the circuit breaker when closed

• Mechanical key lock to prevent the circuit breaker

connection when the earthing switch is in closed position.

• Mechanical lock to prevent the disconnection of auxiliary

connector with circuit breaker in connected position if the

door lock option is not present.

• Mechanical lock to prevent the manual opening of the

shutters when the circuit breaker is removed from the

compartment. The shutters can only be operated by the

circuit breaker truck.

• Mechanical protection (IP20) form live parts even with door

open is always maintained with circuit breaker in connected

and disconnected position.

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CE - B - C - en - REV.00 2015.6

Rated voltage kV 12 17,5 24

Rated power frequency withstand voltage (1min) kV 28 38 50

Rated lightning impulse withstand voltage kV 75 95 125

Rated frequency Hz 50/60 50/60 50/60

Rated short-time withstand current (3 sec) kA 50 50 40

Peak current kA 125 125 100

Internal arc withstand current IAC-AFLR (1sec)* kA 50 50 40

Rated current max. A 3150 3150 2500

Rated current with forced ventilation ** max. A 4000 4000 4000

Rated current with two breakers in parallel ** max. A 5000 5000 4000

Rated voltage 12KV 17,5KV 24KV

Depth (mm) 1625 1860 2000

Height (mm) 2325 2325 2325

Height (mm) - IAC 2780 2780 2780

Width (mm) 600 ÷ 1000 700 ÷ 1000 700 ÷ 1000

Rated current up to (A) 630 ÷ 4000 1600 4000 1600 2500

Note * Internal arc withstanding in option ** Type tested

CE-B VERSION UP TO 24 kV

Electrical Data

Dimensions could be affected by specific equipment and configuration.

D

H H HE E E

D D D

A A A

B B

F F

F

FC C

G G G

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CE - B - C - en - REV.00 2015.6

CE-BP VERSION UP TO 24 kV

Rated voltage 12 kV 17,5 kV 24 kV

Depth (mm) 1450 1450 1450

Depth (mm) IAC 1600 1600 1600

Height (mm) IAC > to 25 kA 2628 2628 2628

Height (mm) IAC up to 25 kA 2329 2329 2329

Width (mm) 600 ÷ 1000 800 1000 800 1000

Rated current up to (A) 630 ÷ 2500 1600 2500 1600 2500*

Note * With main Bus Bar 1600A


Electrical Data

D

E

A

B

F

G

C

H

EXAMPLE OF CONFIGURATION

CE- PMETAL ENCLOSED SWITCHBOARD

CE- BMETAL CLAD SWITCHBOARD

TYPICAL SECTIONS TYPICAL SECTIONS

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CE - B - C - en - REV.00 2015.6

CE-B36 VERSION UP TO 36 kV / 40,5 kV

Rated voltage kV 36 40,5

Rated power frequency withstand voltage (1min) kV 70 85

Rated lightning impulse withstand voltage kV 170 185

Rated frequency Hz 50/60 50/60

Rated short-time withstand current (3 sec) kA 31,5 31,5

Peak current kA 80 80

Internal arc withstand current IAC-AFLR (1sec)* kA 31,5 31,5

Rated current max. A 2500 2500

Rated current with forced ventilation ** max. A 3150 3150

Rated current with two breakers in parallel ** max. A 4000 4000

Dimensions

Note * Internal arc withstanding in option ** Type tested

Electrical Data

W

H

Width (mm) 1000 - 1200

Height 2475 - 2550

Height (mm) - IAC 2925

Depth (mm) 2550 - 3000


D

H H HE E E

D D DA A A

F

F

B B

C C C

G G G

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CE - B - C - en - REV.00 2015.6

VERSIONS AND CONFIGURATIONS TYPICAL UNITS

Special VersionsEnvironment

• For special environments and temperature

• For indoor use with protection degree up to IP54

• Type CE-BO for outdoor use in metal box up to protection degree IP66

or NEMA 4

Connection

• Incoming/outgoing by cables form the TOP

• Incoming/outgoing by bus duct form the TOP

Options and accessoriesAvailable Locks

• Key locks permitting the key to be released with Circuit

Breaker locked in open positions

• Key locks permitting the key to be released with Circuit

Breaker locked in disconnected position

• Key locks permitting the key to be released with circuit

breaker door closed

• Key lock permitting the key to be released with earthing

switch closed and locked in closed position

• Key lock permitting the key to be released with earthing

switch open and locked in open position

• Electromechanical lock to prevent closing of earthing switch

• Mechanical lock to allow door opening only if circuit breaker

is in disconnected position and the shutters closed

• Padlock facility on circuit breaker shutters in closed position

• Padlock facility to prevent circuit breaker connecting or

disconnecting movement

• Padlock facility to prevent opening or closing of earthing switch

• Padlock facility on circuit breaker door

• Mechanical lock to allow rear connection door opening only with

earthing switch in close position

Command

• Motorized command for draw-out / draw-in circuit breaker

trolley for SWG up to 24 kV

• Motorized command for earthing switch for SWG up to 24 kV

Accessories

• Light or pressure device to limit internal arc fault duration

• Circuit breaker trolley for handling when removed from the compartment

• Contactor trolley for handling when removed from the compartment

• Handle for circuit breaker / contactor connecting or

disconnecting movement

• Handle for earthng switch command

Eart

hing

Eart

hing

Eart

hing

Optional

Type CE-BO for outdoor installation, with metal enclosure and protection degree up to IP66 / NEMA 4

1514


Headquarters and Factory:

via G. Rossini, 24

37060 Castel d’Azzano

(Verona) Italy

Tel. +39 045 8546511

Fax +39 045 8520214

E-mail: [email protected]

Production Branch:

Contrada Piana Z.I.

86019 Vinchiaturo

(Campobasso) Italy

Tel. +39 0874 340225

Fax +39 0874 340227

www.casagrande.vr.it

MEDIUM VOLTAGE CE-B METAL CLAD · PDF fileMEDIUM VOLTAGE CE-B METAL CLAD SWITCHBOARDS...

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