sarel sysclad primary switchgears 12 175kv

8/9/2019 Sarel Sysclad Primary Switchgears 12 175kv

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SYSclad switchboard

equipped with draw ‐out type

vacuum circuit

breaker

630÷3150A

SYSclad

12÷17,5kV

16÷31,5kA


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Generalities

SYSclad is a medium volta e switchboard metal clad t e, air insulated, e ui ed with vacuum circuit breaker

suitable for the primary distribution. The switchboard is modular and is made up by placing standardized units side

by side in a coordinated way.

The unit compartments are metallically segregated from each other and the live parts are air insulated.

The switchboard functional units are guaranteed to be arc‐proof in compliance with IEC 60298 Standards

The switchboard

is

fitted

with

all

the

interlocks

needed

to

prevent

incorrect

operations

which

might

jeopardize

the

safety of the personnel in charge of it.

Electrical characteristics of the switchgear

Rated voltage kV 12 17,5

Rated insulation voltage kV 12 17,5

Test voltage

at

power

frequency kV

1

min 28 38

Impulse withstand voltage kV 75 95

Rated frequency Hz 50‐60 50‐60

Rated short‐time withstand current kA 3s 31,5 31,5

Peak current kA 78,5 78,5

Internal arc withstand current kA 0,5s 25 25

Main

busbar rated

current A 3150 3150630 630

Rated current of the branch connections A 1600

2000

2500

3150

1600

2000

2500

3150

4

2


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Characteristics of the switchgear

3

1

2

4 Each unit consists of the following compartments:1) Main busbar

2) Circuit breaker compartment

3) Auxiliary and instrument compartment

4) VT compartment

5) Feeder

3


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Com artments

Each unit consist of three power compartments:

busbar, feeder and circuit breaker and three auxiliary compartments: instrumnets, auxiliary circuit interconnection

wiring duct and voltage transformers.

The arc

proof

switchgear

is

also

fitted

with

a

duct

to

evacuate

the

gases

produced

by

a

possible

internal

arc.

All

the

compartments are metallically segregated from each other.

Main busbars

The busbar compartment houses the main busbar system, which is connected to the circuit breaker fixed isolating

contacts by means of branch connections.

The main busbars are made of electrolytic copper which can be covered with insulating material on request.

Branch connections

The feeder

compartment

houses

the

branch

connection

system

to

connect

the

power

cables

to

the

fixed

isolating

contacts of the circuit breaker.

The branch connections are made of electrolytic copper.

Earthing switch

.

also be used to earth the busbar system (measuring, bus tie and riser units). The earthing switch is fitted with short‐

circuit making capacity.

Rated voltage kV 17,5 (*)

Short‐time withstand current /kA

25 x 3s

Earthing busbar

Short‐time making capacity , x s

Peak current kA 63

79

(*) Values also valid for 15 kV

The earthing busbar is made of electrolytic copper. It runs longitudinally round the whole switchgear on the inside,

thereby guaranteeing

maximum

safey for

the

personnel

and

for

the

installation.

Monoblocs and shutters

The monoblocs consist of bushing insulators containing the top and bottom power connections of the circuit

breaker compartment, towards the feeder and busbar compartments respectively.

The shutters are of metallic type and are automatically operated when the circuit breaker moves from the isolated

position to the connected position and vice versa.

They can be fitted with a fail‐safe device (optional) to prevent their being manually opened with the circuit breaker

removed and the door open.

Each shutter can be locked using two independent padlocks (optional).

The switchgear is fitted with all the interlocks needed to prevent incorrect operations which might jeopardise

T he safety of the personnel in charge of it.4


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In articular, lockin devices are rovided to revent the followin o erations:

‐ circuit breaker closing in an intermediate position

‐ circuit breaker racking‐out in the closed position

‐ circuit breaker racking‐in in the closed position

‐ circuit breaker compartment door opening in the connected or intermediate position

‐ circuit

breaker

racking

‐in

with

the

compartment

door

open

And if the unit is fitted with an earthing switch with the following as well:

‐ earthing switch closing with the circuit breaker in the connected or intermediate position

‐ circuit breaker racking‐in with the earthing switch closed

Voltage transformers

The voltage transformer, Tesar manufacturing, are of the type insulated in resin and are used for power supply to

measuring instruments and protection. They are available either for fixed installation or mounted on withdrawable

truc s.

They comply

with

IEC

60044

‐2

Standards.

The

dimensions

of

the

version

used

for

fixed

assembly

comply

with

DIN

42600 Narrow type Standards. On the other hand, the ones installed on a withdrawable truck are the dedicated

type. These transformers can have one or two poles, with performances and classes of precision suited to the

functional requirements of the instrument connected to them.

When they are installed on withdrawable trucks, they are fitted with medium voltage protection fuses.

The current transformers, Tesar manufacturing, are of the type insulated in resin and are used for power supply to

measuring instruments and protections. These transformers can either have a wound core or through bar with one

or more cores, with performance and precision classes suited to the installation requirements.

They comply with IEC 60044‐1 Standards.

Their dimensions are usually according to the DIN 42600 Narrow Type Standard, in the Medium and Long Size versions. The switch ear unit can be e ui ed with one or two sets of three transformers.

TESAR instrument transformers

5


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Protection a ainst internal arcs


Internal fault test – CESI Laboratories

IEC 62271‐200

Loss of

service

continuity

categoty (LSC) LSC2B

Internal fault: short‐circuit current 25kA

Internal fault: short‐circuit duration 0,5s

Internal fault: classification IAC

(initials for Internal Arc Classified) AFL

6


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De rees of rotection

The degrees of protection of the switchboard comply with IEC 60529 / CEI EN 60529 Standards.

SYSclad switchboard are normally supplied with the following standard degrees of protection:

• external housing IP4X

• inside the

units IP2X

Environmental conditions

The switchgear ratings are guaranteed under the following environmental conditions:

Minimum ambient temperature ‐ 5 °C

Maximum ambient temperature + 40 °C

Maximum relative humidity 95%

Standards

The SYSclad and the main equipment it contains comply with the following Standards:

Maximum

altitude 1000

m

s.l.m.

In presence of unpolluted and non‐corrosive atmosphere

• IEC 62271‐1 for the general application

• IEC 62271‐200 for the switchboard

• IEC 62271‐102 for the earthing switch

• IEC 60071‐2 for coordination of the insulation

• IEC 62271‐100 for the circuit breaker

• IEC

60470

for

the

contactor

• IEC 60265‐1 for the switch‐disconnector.

T e IEC 62271‐200 Stan ar as intro uce new criteria regar ing t e e initions an c assi ication o MV

switchgear. One of the main changes introduced by this Standards is elimination of the classification of switchgear

in metal‐clad, divided into compartments and in units. The classification of switchgear has been reviewed taking

into account the viewpoint of the user, particularly regarding some aspects such as operability and maintenance of

the switchgear, according to the requirements and expectations of good management of substations, from

installation to dismantling. In this context, the “loss of service continuity” has been chosen as the fundamental

criterion for the user.

,

1. Compartment with access controlled by an interlock

Compartment containing high voltage parts, designed to be open for normal service and/or normal

maintenance, where

access

is

controlled

by

the

overall

configuration

of

the

switchgear

and

by

the

control

apparatus.

2. Compartment with access based on a procedure

Compartment containing high voltage parts, designed to be open for normal service and/or normal

maintenance where access is controlled b an ade uate rocedure associated with a locked status.

3. LSC2B

Busbar, feeder and apparatus compartments physically and electrically segregated.

This category defines the possibility of opening one of the main circuit compartments keeping the other

compartments and/or function units energised.

4. Partition class

Metal‐clad switchgear and control apparatus which offer continuous metallic segregation and/or shutters (if

applicable), destined

to

be

earthed,

among

the

freely

accessed

compartments

and

the

live

parts

of

the

main

circuit.

The metallic segregations and shutters or the metallic parts of these, must be connected to the earthing point

of the functional unit.7


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Characteristics of the VCB

Generalities

SYSclad units is equipped with withdrawable WL/r vacuum circuit breaker.

The circuit breaker is fitted with a truck for racking in and out of the switchgear with the door closed.

The light and compact structure guarantees great sturdiness and excellent mechanical reliability.

The operating

mechanism

and

the

poles

are

fixed

to

the

metallic

structure

which

also

acts

as

the

support

for

the

moving contact actuation kinetics.

The WL/r circuit breaker use vacuum as the interruption and insulating medium.

Thanks to the advance techniques used for their construction, the WL/r circuit breaker ensure high performances

under all service conditions.

The vacuum interrupter are embedded in the poles made of epoxy resin. This construction means the interrupter

are unaffected by shocks, humidity and environmental pollution.

The circuit breaker poles, making up the interruption part, are sealed for life pressure systems (IEC 62271‐100 and

CEI 17.1 Standards) and are maintenance‐free.

e r c rcu t rea er are prov e w t mec an ca store energy operat ng mec an sms w t ree tr p an

allow opening

and

closing

operations

independent

of

the

operator’s

actions.

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Characteristics of the VCB

VCB type WL/r-C 12kV-17,5kV “CASSETTE” – Moving part

Predisposed for mounting inside to enclosures

Tested and constructed in accordance whith IEC Standards

Compact dimensions

Long electrical and mechanical life

Resin poles with embedded interrupters

Sealed‐for‐life and maiontenance‐free poles

Vacuum Circuit Breaker WL/r‐C 12 WL/r‐C 17

Rated voltage and isolation kV 12 17,5

Withstand voltage ( 1 min ) kV (50 Hz) 28 (42) 38 (42)

Lighting impulse withstand voltage kV 75 95

Rated frequency Hz 50

‐60 50

‐60

Use SYSclad‐C SYSclad‐C

Electrical characteristics

Rated current A (40°) 630 1250 1600 2000 2500 3150 630 1250 1600 2000 2500 3150

Short‐time withstand current (3 s) kA

16 ‐ ‐ 16 ‐ ‐

20 20 20 20 20 20

25 25 25 25 25 25

31,5 31,5 31,5 31,5 31,5 31,5

Making capacity kA

40 40 40 40 40 40

53 53 53 53 53 53

63 63 63 63 63 63

Operation sequence 0‐0,3‐CO‐3s‐CO 0‐0,3‐CO‐3s‐CO

Opening time ms 40 … 60 40 … 60

Breaking internal

arc

time ms 10

…

15 10

…

15

Total breaking time ms 50 … 75 50 … 75

Closing time ms 60 … 80 60 … 80

Overall dimension

Height mm 645 712 737 645 712 737

Width mm 502 652 852 502 652 852

Depth mm 679 658 663 679 658 663

… … … … … …

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Dimensions of the VCB

VCB type WL/r 12kV-17,5kV “CASSETTE” – Moving part

630A‐1250A

1600A‐2000A


2500A‐3150A


10


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Characteristics of the VCB compartment

VCB type WL/r-C 12kV-17,5kV “CASSETTE” – Cradle

Predisposed for mounting inside to enclosures

Tested and constructed in accordance whith IEC Standards

Compact dimensions

Long electrical and mechanical life

Bushing made in cast resin

Can be equipped whit earthing switch

Module C1–63‐12 C1–16‐20 C1–25‐31 C2–63‐12 C2–16‐20 C2–25‐31

Width of module mm 600 800 1000 600 800 1000

Rated voltage and isolation kV 12 17,5

Withstand voltage ( 1 min ) kV (50 Hz) 28 (42) 38 (42)

Lighting impulse

withstand

voltage kV 75 95

Rated current A (40°) 630 1250 1600 2000 2500 3150 630 1250 1600 2000 2500 3150

Short‐time withstand current (3 s) kA

16 ‐ ‐ 16 ‐ ‐

20 20 20 20 20 20

25 25 25 25 25 25

31,5 31,5 31,5 31,5 31,5 31,5

Making capacity kA

40 40 40 40 40 40

53 53 53 53 53 53

63 63 63 63 63 63

Weight Kg 100 … 150 100 … 150 100 … 150 100 … 150 100 … 150 100 … 150

Use SYSclad‐C SYSclad‐C

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Electric circuit diagrams

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Note

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Due to continuous development in material

,

are not binding and subject to our revision.


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S c l a d 0 0 2 - 0 2 1 1

S_

S

Via del Commercio 12/14 - 26900 Lodi – Italy – www.sarel.it

Tel 0039 0371- 4906.1 Fax 0039 0371- 411.422 E-mail [email protected]

sarel sysclad primary switchgears 12 175kv

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