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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
3Biosco - Présentation clientèle - 08/2007
Contents
Introduction
Type-tested substations
The type tests
A specification tool
Conclusion
4Biosco - Présentation clientèle - 08/2007
> 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
5Biosco - Présentation clientèle - 08/2007
> 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
6Biosco - Présentation clientèle - 08/2007
> 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
7Biosco - Présentation clientèle - 08/2007
Contents
Introduction
Type-tested substations
The type tests
A specification tool
Conclusion
8Biosco - Présentation clientèle - 08/2007
> 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
9Biosco - Présentation clientèle - 08/2007
> 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
10Biosco - Présentation clientèle - 08/2007
> 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
11Biosco - Présentation clientèle - 08/2007
Contents
Introduction
Type-tested substations
The type tests
A specification tool
Conclusion
12Biosco - Présentation clientèle - 08/2007
> 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
13Biosco - Présentation clientèle - 08/2007
> 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
14Biosco - Présentation clientèle - 08/2007
> 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.
15Biosco - Présentation clientèle - 08/2007
> 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
16Biosco - Présentation clientèle - 08/2007
> 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
17Biosco - Présentation clientèle - 08/2007
> 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.
18Biosco - Présentation clientèle - 08/2007
> 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)
19Biosco - Présentation clientèle - 08/2007
> 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
20Biosco - Présentation clientèle - 08/2007
> 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
21Biosco - Présentation clientèle - 08/2007
> 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.
22Biosco - Présentation clientèle - 08/2007
Contents
Introduction
Type-tested substations
The type tests
A specification tool
Conclusion
23Biosco - Présentation clientèle - 08/2007
> A specification tool
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…
24Biosco - Présentation clientèle - 08/2007
> A specification tool
A specification tool
The information required for specifications is summarised in table form. All the electrical utility has to do is complete this information.
25Biosco - Présentation clientèle - 08/2007
Contents
Introduction
Type-tested substations
The type tests
A specification tool
Conclusion
26Biosco - Présentation clientèle - 08/2007
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
27Biosco - Présentation clientèle - 08/2007
Thank you for your attention