iec 62271 202 standards en

1

Biosco: MV/LV prefabricated substations

IEC 62271-202Presentation of the standard

Safety is a choice

2Biosco - Présentation clientèle - 08/2007

Contents

Introduction

Type-tested substations

The type tests

A specification tool

Conclusion


Contents

Introduction


The type tests


Conclusion


> Introduction

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


> Introduction

Introduction

IEC 62271-202 standard specifies 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 assembly comprising an enclosure that includes:

Transformer LV switchboard MV switchboard MV and LV interconnections Auxiliary equipment


> Introduction

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


Contents

Introduction


The type tests


Conclusion


> Type-tested substations

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


> Type-tested substations> Type-tested substations

The prefabricated substation undergoes type tests

MVLV

Use of equipment conform to IEC standards

Oil retention

Earthing circuit test

Mechanical resistance of the enclosure

Temperature class

Sound level Degree of protection

Insulation level

Internal arcing withstand

Non flammable materials

Electromagnetic compatibility

Functional tests


> Type-tested substations

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


Contents

Introduction


The type tests


Conclusion


> The type tests

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


> The type tests

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 µs wave and a voltage of 125 kV


> The type tests

Temperature rise tests

Aim of test

To determine the enclosure class To guarantee that none of the substation components will

overshoot its standard-defined limits To guarantee temperature on the parts of the enclosure likely to

be touched during operation To guarantee lifetime of insulating devices and thus safety of

equipment 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 to

ambient temperatures, degrees of protection or transformer losses

Numerical modelling and thermal simulations are performed.


> The type tests

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


> The type tests

Functional tests

Aim of tests To guarantee that it is possible to carry out all the operations

required 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 type tests

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 tests

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/m² IK10 (including doors and ventilation grids)


> The type tests

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 tests

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 tests

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.


Contents

Introduction


The type tests


Conclusion


> A specification tool


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 tool


The information required for specifications is summarised in table form. All the electrical utility has to do is complete this information.


Contents

Introduction


The type tests


Conclusion


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 arcing withstand

Earthing circuit test

Mechanical resistance of the enclosure

Temperature class

Sound level

Insulation level

Non flammable materials

Electromagnetic compatibilityFunctional tests


Thank you for your attention

iec 62271 202 standards en

Documents

specification

contents introduction

specification

general public

type tests

prefabricated

lv interconnections

tested substations