INSPECTION, TESTING AND COMMISSIONING OF
ELECTRICAL SWITCHBOARDS, CIRCUIT BREAKERS, PROTECTIVE RELAYS, CABLES AND PLCs
WHAT YOU WILL LEArN:
Nuts and bolts of electrical inspection, testing and commissioning Detailed principles and rules for inspection, testing and commissioning of switchboards, switchgear, cabling and protection relays Selection of appropriate type and rating of switchgear and circuit breakers The different standards and specifications used for switchgear and circuit breakers Asset management of switchgear and protective relays Safe maintenance policies including safe working in switch rooms, indoor and outdoor substations
WHO SHOULD ATTEND:
Design engineers Electrical engineers and technicians Electrical maintenance engineers, technicians and supervisors Electricians Field and service technicians Instrumentation engineers and technicians Plant operators Project engineers And managers, engineers, technicians and electricians who work with switchgear, circuit breakers, switchboards and cabling who need to update their skills and knowledge in this critical area of inspection, testing and commissioning
2.95
The Workshop
Whether you are designing, specifying, installing, testing or commissioning electrical equipment from small to large commercial and industrial installations, you need to have a thorough understanding of switchboards, switchgear, circuit breakers and associated protective relays. The overall focus of this workshop is on electrical inspection, testing and commissioning and will commence with a detailed examination of switchgear (and circuit breakers). Circuit breakers are critical components in electrical distribution systems and their operation significantly affects the overall operation of the system. Protection relays are then discussed. These are used in power systems to maximise continuity of supply and are found in both small and large power systems from generation, through transmission, distribution and utilisation of power in plant, industrial and commercial equipment. Day two will cover commissioning and periodic inspection of cables and their various failure modes and how to detect these faults. The often neglected topic of switchboards will be detailed next, followed by the interesting topic of interfacing to the control system (either PLCs or other control devices). The course will be concluded with a number of practical case studies which will pull together the materials examined over the past two days. This workshop will cover the key elements in a practical and project focussed way. Many people assume (wrongly) that inspecting, testing and commissioning is a fairly straightforward process and is simply a rubber stamp confirmation of a so-called outstanding design. Our experience in the field demonstrates quite the opposite; where the litany of problems ranges from design and installation errors to equipment manufacturing defects. It is best that these problems are identified and corrected before the inevitable downtime comes in an operational installation where many thousands of dollars are lost in correcting the faults. The situation today is made more challenging by the heightened safety requirements and interfacing to low powered electronic control and monitoring devices (such as PLCs) using software that has to also be verified.
The Program
Day oNE
FUNDaMENTaLS oF SWITCHGEaR
Single line diagrams Typical construction LV/MV and HV Active and passive network components Circuit breaker utilisation Fuse switches HV fuses in combination with and as alternatives to circuit breakers Auto-reclosers and auto-reclose operations
Day TWo
CaBLING CoMMISSIoNING aND PERIoDIC TESTING
Review of codes for testing Drum length checks Post installation checking Pre-commissioning and periodic tests Tests as tools for condition monitoring and early failure alarm HV tests using DC and very low frequency AC Partial discharge tests and mapping of results Dielectric dissipation factor measurements Micro destructive and non-destructive tests for life assessment Operation and maintenance of cables
Practical Session
SPECIFICaTIoN oF SWITCHGEaR
Switchgear ratings highest system and impulse withstand voltages, load and short circuit currents Simple and complex protection schemes Switchgear ancillaries, measurement CTs, VTs and relays Cable terminations Indoor and outdoor operation
Practical Session
Practical Session
CaBLE FaILURE MoDES aND FaULT DETECTIoN
Types of failure Reasons for failure Fault location Electrical tests for detection of cable faults Safety issues in fault detection Analysis of failures
SHoRT CIRCUIT TESTING
Symmetrical and asymmetrical breaking Make and break operations Understanding test oscillograms Case study specification for a 132kV switchboard
Practical Session
Practical Session
SWITCHGEaR DIaGNoSTICS, TESTING aND MaINTENaNCE
Asset records Condition Based Maintenance (CBM) Reliability Centred Maintenance (RBM) Switchgear inspection methodologies Insulation deterioration Diagnostic techniques:
SWITCHBoaRD INSTaLLaTIoN, INSPECTIoN aND CoMMISSIoNING
Inspection Routine, type, acceptance and precommissioning tests High voltage equipment test techniques Commissioning procedures
Practical Demonstrations, Videos and Exercises
We (and you) know that no matter how good the instructor is (and ours are very good!) no one learns from listening to a lecture. The best way of learning and gaining real skills is a high level of interaction with your peers and your instructor and also in undertaking handson exercises which relate to the real practical world. Hence we have a busy and enjoyable schedule of useful activities to help you really learn, including:
- Partial discharge measurement and survey - Partial discharge transient earth voltage (TEV) monitoring - Partial discharge by acoustic methods - Timing tests - Thermovision - Tan delta testing
Principles of circuit breaker maintenance Contact maintenance and contact wipe Oil testing Maintenance of vacuum circuit breakers and SF6 Switchgear defects and defect control Switchgear installations
Practical Session
INTERFaCE To CoNTRoL EQUIPMENT (PLCS)
Overview of PLC PLC I/O modules Pre-commissioning tests Commissioning procedures Typical faults
Practical Session
CaSE STUDIES oF TyPICaL PRoBLEMS
Improper circuit breaker trip unit and relay settings Motor overload protection Medium voltage distribution system installation problems Switchboard metering problems Emergency distribution problems Noisy transformers Incorrect earthing and neutrals And many others
Practical Session
PoWER SySTEM PRoTECTIoN PRINCIPLES aND RELayS
Principles of protection Types of faults Types of protection systems Types of protective relays Electromechanical and static relays Numerical relays
31 short, punchy videos on switchgear, circuit breakers, protective relays and cables 32 short, practical design exercises on each topic using simulation software and calculators 4 case studies on switchgear, circuit breakers, protective relays and cables where you will work in small groups to solve real electrical engineering problems
To gain full value from this workshop, please bring your calculator and laptop/notebook computer.
Practical Session
Practical Session
CoNFIGURaTIoN oF NUMERICaL RELayS
Setting approach in conventional relays Configuration of relays Troubleshooting typical problems
SUMMaRy oPEN FoRUM , aND CLoSING
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