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Biosco: MV/LV prefabricatedsubstations

IEC 62271-202

Presentation of the standard

Safety is a choic e

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2Biosco - Prsentation clientle - 08/2007

Contents

Introduction

Type-tested substations

The type tests

A specification tool

Conclusion

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Contents

Introduction


The type tests


Conclusion

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> Introductio

Standard IEC 62271-202: an international influence

Biosco conforms to IEC 62271-202 international standard

IEC 62271-202 standard applies to most of prefabricated substations

world-wide.

UL

IEC

IEC

IEC

IEC

IEC

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> Introductio

Introduction

IEC 62271-202 standardspecifies the rated characteristics, the

design and construction rules and the test methods applicable to

prefabricated substations.

A prefabricated substation is defined as a type-tested assemblycomprising an enclosure that includes:

Transformer

LV switchboard

MV switchboard

MV and LV interconnections

Auxiliary equipment

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> Introductio

Introduction

These substations are located in places accessible to the general

public. Consequently, safety of persons must be guaranteed

Conformity to the IEC standard guarantees:

Protection of the general public

Protection of operators

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Contents

Introduction


The type tests


Conclusion

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> Type-tested substation

Type-tested equipment

All substation components must conform to IEC standards and in

particular:

Transformers: IEC 60076-1 or 60076-11

MV switchboard: IEC 62271-200 or 62271-201

LV switchboard: IEC 60439-1 and IEC 60947-1

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> Type-tested substation> Type-tested substation

The prefabricated substation undergoes type tests

MVLV

Use of equipment conform to

IEC standards

Oil retentionEarthingcircuit test

Mechanical resistance

of the enclosure

Temperature

class

Sound level

Degree ofprotection

Insulationlevel

Internalarcingwithstand

Non

flammable

materials

Electromagnetic

compatibility

Functional tests

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> Type-tested substation

The 4 designs of the Biosco range conform to IEC

62271-202 standard

Biosco W:Substation with corridor

Operation protected from bad weather

conditions

Biosco N: Substation with external operation

Ground space savings

Biosco H: Half-buried substation

Visual impact limited

Biosco U: Underground substation Blends completely

into the environment

Biosco UBiosco N Biosco HBiosco W

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Contents

Introduction


The type tests


Conclusion

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> The type test

The type tests

1. Dielectric tests

2. Temperature rise tests

3. Main circuit and earthing tests

4. Functional tests

5. Degree of protection verification tests

6. Mechanical tests

7. Arcing due to an internal fault tests

8. Sound verification tests

9. Electromagnetic compatibility tests

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> The type test

Dielectric tests

Aim of test

To guarantee insulation of HV and LV interconnections

Our performance

The HV and LV interconnections of the Biosco range are tested

as per standards IEC 60694 and 60439 Example for 24 kV switchgear:

Withstand to voltage of 50 kV at power frequency for 1

min

Withstand to lightning impact voltage tests for a 1.2 s

wave and a voltage of 125 kV

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> The type test

Temperature rise tests

Aim of test

To determine the enclosure class

To guarantee that none of the substation components willovershoot its standard-defined limits

To guarantee temperature on the parts of the enclosure likely tobe touched during operation

To guarantee lifetime of insulating devices and thus safety ofequipment during the period of operation

Our performance

The Biosco substation enclosures are class 10 as standard

This performance can be adapted to your needs according toambient temperatures, degrees of protection or transformerlosses

Numerical modelling and thermal simulations are performed.

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> The type test

Main circuit and earthing tests

Aim of test:

To guarantee the capacity to withstand short-circuit currents

Our performance

The Biosco substations are tested up to 12 kA

Th t t t

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> The type test

Functional tests

Aim of tests

To guarantee that it is possible to carry out all the operationsrequired for commissioning, operation and maintenance

Our performance

The Biosco substations undergo a series of verifications

Switchgear operation

Mechanical operation of substation doors

Reading transformer temperatures and oil levels

Monitoring voltage readings

Installation of earthing devices

Cable tests

Replacement of fuses and monitoring of locking systems

Operating the transformer on-load tap changer Cleaning the ventilation grids

Monitoring the locking systems

> The t pe test

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> The type test

Degree of protection verification test

Aim of test

To ensure the protection of people against access to hazardous

parts

To guarantee the protection of equipment against ingress of

foreign solid objects and water.

Our performance

The degree of protection of the Biosco substations is between

IP23 and IP54

This performance can be adapted to your needs: stipulations of

standards and climatic requirements.

> The type test

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> The type test

Mechanical tests

Aim of test

To guarantee withstand of roof in event of overload: people,

snow, etc.

To guarantee the resistance of substation to wind pressure and

to mechanical impacts on walls, covers, doors, ventilation

opening.

Our performance

Roof withstand greater than 250 daN/m

IK10 (including doors and ventilation grids)

> The type test

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> The type test

Arc due to an internal fault test

Aim of test

To guarantee the protection of operators and the general public.

The standard defines a classification:

Class A: operator protection

Class B: general public protection

Class AB: operator and general public protection

Our performance

Koolarc system (cools and reduces pressure of arc gases)

Classification for all substation types

Example Biosco N India IAC-AB-20kA-1s

Pressure and temperature simulation

> The type test
http://localhost/var/www/apps/conversion/tmp/scratch_9/Test_manque2b.wmvhttp://localhost/var/www/apps/conversion/tmp/scratch_9/Film%20biosco_closed_intranet.wmv

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> The type test

Sound verification test

Aim of test

To ensure that the substation enclosure does not increase the

transformer noise level.

Our performance

The Biosco substations conform to the requirements of the IEC

standard

> The type test

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The type test

Electromagnetic compatibility test

Aim of test

To satisfy emission requirements laid down by international

standards

To guarantee the proper operation of equipment in an

environment comprising large electromagnetic disturbance

sources

Our performance

HV and LV switchgear comply with the specifications of

standards IEC 60694 and 60439-1.

Electromagnetic fields are simulated.

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Contents

Introduction


The type tests


Conclusion

> A specification too

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p


Standard IEC 62271-202 tells users which information should be

supplied for invitations to tender and orders.

Network specificities

Nominal and highest voltages

Frequencies

Neutral earthing mode

Operating conditions

Minimum and maximum temperatures

Altitudes

The specificities and electrical characteristics of prefabricated

substations

Voltage, power, frequency

> A specification too

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The information required for specifications is summarised in table

form. All the electrical utility has to do is complete this information.

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Contents

Introduction


The type tests


Conclusion

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Conclusion

Type-tested MV, LV equipment and

transformer

A series of type tests to guarantee safety and

reliability of the prefabricated substation

throughout its life cycle.

An MV/LV substation specification guide

providing all characteristics and installation

and operation conditions

MVLV

Use of equipment conform

to IEC standards

Oil retention

Internal

arcingwithstand

Earthing

circuit test

Mechanical resistanceof the enclosure

Temperature

class

Soundlevel

Insulation

level

Non

flammablematerials

Electromagneticcompatibility

Functional tests
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Thank you for your attention