Download Medium Voltage Switchgear Condition Assessments

Medium Voltage Switchgear Condition
Assessments
Comprehensive Medium Voltage Switchgear condition assessments
Audits for Transmission and
Distribution equipment
Siemens has a strong heritage of
expertise across Transmission and
Distribution equipment. Our audit tools
have been specifically developed for the
performance of objective, transparent
and comparable condition assessments.
Siemens condition assessments provide
the basis for a targeted maintenance
strategy of critical substation assets like
high voltage gas insulated switchgear
(GIS), high voltage circuit breakers,
power transformers and medium voltage
switchgear.
The results of our assessments are
properly documented with multilingual
audit reports.
Each report includes a graphical
representation of the medium voltage
switchgear condition, comprehensive
audit information as well as
recommendations for condition based
maintenance.
Transmission & Distribution Services
Asset Services
Audits for Medium Voltage Switchgear
Siemens audits for medium voltage switchgear suits
to electricity companies as well as industrial
companies and are structured as follows:
Gathering of medium voltage switchgear
historical- and technical information like
maintenance procedures, major faults,
modifications, retrofit, etc.
Medium voltage switchgear Visual Inspection
with the medium voltage switchgear in operation
to evaluate the external condition, to measure
values of built-in indicators and to identify ageing
factors, as well as malfunction of operating
mechanisms, secondary system, etc.
Actual personal Safety regulations have to be
observed strictly during performing an audit as
switchgears and substations are subjected to
modifications during their lifetime.
Optional functional checks and measurements
are included in the Extended Diagnostic such
as applicable SF6 analysis, PD measurements,
thermography, electrical measurements, etc.
Assessing the Condition of Medium
Voltage Switchgear
A medium voltage switchgear condition
assessment with our audits tools can
include the following activities:
General Information
Gathering of key data like technical –
and historical information, years of
operation, performed maintenance
procedures, major faults, short
circuits, customer remarks, etc.
Visual Inspection
External condition
Assessment of installation area
Building
Investigation inside and outside the
building and its facilities like pressure
releases, cable channels, etc.
Switching devices
Assessment of switching devices like
circuit breakers, load break switches,
disconnectors and earthing switches,
withdrawable units, trollies, interlocking
devices, etc.
Components
Analysis of the condition of components
like post insulators, bushings, bus bars,
current – and voltage transformers,
surge arresters and surge limiters
Switchgear Accessories
Assessment of tools and instruments like
SF6-gas maintenance unit, if applicable,
voltage detectors, earthing equipment,
etc.
Master control cubicles
Assessment of control cubicles,
condition of sealing, terminal blocks,
terminal strips, labelling and contact
position indicators
it is safer to take care beforehand
Safety
Personnel Safety
Assessment of personnel safety such as
electrical insulation, internal arc
protection, protection during operation as
well as considering country specific
standards
Extended Diagnostic
SF6 gas analysis
Measurements of dew point,
decomposition products and volume
percentage. Search for gas leakage
PD Measurements
Acoustic measurements, UHF
measurements or classical PD
measurements according to IEC 60270
Circuit breakers
Measurements of operating times and
resistance. Electrical and mechanical
functional check of operating
mechanisms
Switching devices
Electrical and mechanical functional
check of operating mechanisms and
inspection of contact systems
Secondary system
Assessment of relays, protections,
interlock-units, contactors, batteries
and charging system
Thermography
Thermographic scanning to locate hot
spots
Published by and copyright © 2009:
Siemens AG
Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens AG
Energy Sector
Power Distribution Division
Transmission and Distribution Services
Humboldstrasse 59
90459 Nuremberg, Germany
www.siemens.com/energy/services
For more information, please contact
our Customer Support Center.
Phone: +49 180 524 70 00
Fax:
+49 180 524 24 71
(Charges depending on provider)
E-mail: [email protected]
Power Distribution Division
Order No
SE_AS_1003e_P2310_switchgear_Audits
Printed in Germany
Printed on elementary chlorine-free
bleached paper.
All rights reserved.
Trademarks mentioned in this document
are the property of Siemens AG, its affiliates,
or their respective owners.
Subject to change without prior notice.
The information in this document contains general
descriptions of the technical options available,
which may not apply in all cases.
The required technical options should therefore
be specified in the contract.