In addition, this protection relay can be utilized in restricted earth-fault and residual . Ensure all joint covers are firmly secured. In an electric power system, switchgear is composed of electrical disconnect switches, fuses or circuit breakers used to control, protect and isolate electrical equipment. Depending on the architecture, busbar protection may cross all zones in the substation. www.utilityproducts.com is using a security service for protection against online attacks. 3.3. Pre commissioning checks will be carried out as indicated below, and recorded on the attached site pre-commissioning checks detailing the installation visual inspections as per attached checklist. Only authorized, competent personnel should energize electrical circuits in line with switching procedure and permit to work forms provided by the site supervisor. Ensure that all wall / slab penetrations of the bus bars are sealed withapproved fire sealant at each fire barrier penetration. The commissioning procedure of substation busbars for differential protection and other busbar protection schemes involves a large number of input and output circuits that require a verification check in both the primary and secondary circuits. Test. Check the resi stance fo r all bus bar joint using m icro-ohm m eter 100 A. When reconnecting the system prior to energization ensure correct phase rotation is achieved by testing prior to energizing the supply. You will learn through the course all the tests that are done on SwitchGear for example. Are there any supports installed on the joint packs? This check is to verify the integrity of the insulation of the busbar following the installation and site conditions. About. We're always looking for great talent to join our global teams. For example, a HiPot test verifies that the multiple conductive layers within a laminated bus bar are sufficiently insulated from one another at a specified voltage. Pickup test of busbar protection modules. Desired Profile - Protection & SAS Testing & Commissioning Engineers - Graduates having degree / diploma in Electrical engineering having 1 7 years experience of onsite testing & commissioning of protection relays and SAS schemes . <>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595.32 842.04] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Ensure that the Bus Bar System installation is completeand mechanical completion is approved & all comments on theinstallation inspection are incorporated. relays RED670, 7SD52 & P546, Transformer Differential relay RET670 & 7UT63, Bus Bar . The main supply switch to the busbar is to be energized first. Are the Tap off box clamps fixed properly as per the Installation Manual? *lNI=]R^$8BD=#Nc^O$NZ}Z3A^ p]tu4pF],l(eht FVap}]Pl+gEK:R>ym?:yk~jT*%?E@\ ?#>_O|$>k#rk/v2\wvNuqAI3VK0#gjIPM8^iXm\.t}5z` Ensure proper flange termination is carried out in respective switch boards. $>MSl%`6LM@8+X6"La`& Check earth leakage circuit breakers by means of RCCB tester, selecting 50% 100%, 150% of the rated sensitivity currents and the respective trip time to be recorded. %%EOF Check all joints for tightness as per manufactures torquing recommendation: Provide scaffolding or ladder for easy access on joints to be tightened. www.utilityproducts.com is using a security service for protection against online attacks. Inspection and Test Plan for Bus Duct - Important Points Checking of outline dimensions, interface dimensions, bus bar dimensions and clearances and other specified dimensions Checking of tightness/torque of terminals Controlling of principal dimensions Witnessing Bus Duct Insulation Resistance Test 2 0 obj To see this page as it is meant to appear, please enable your Javascript! The Inspection request with all relevant documents to be sent to Main Contractor for review and inspection. KMTC invites sealed tenders from eligible The torquing of the bus bar joins shall be carried out using torquewrench as per the values recommended by the manufacturer. Performance & security by Cloudflare. Insulation resistance will be carried out by IR tester at DC 1000 Volts to ensure that the system is free from short circuits and grounds. When 52-2 CT fully saturates, its magnetic field impedance is effectively 0.00. Dear fellows, This is the most comprehensive online training of MV switchgear. Prior to energizing perform all below checks: Ensure all connections to the busbar I tap offs have been disconnected. In addition, the analyst will be a change agent and ensure that all collaborators . Breaker to Breaker Resistance Test According to the Commissioning Definitions and Terminology for the Building Industry: A Common Overview 2018 (ASHRAE, CIBSE and AiCARR) commissioning and testing is: the advancement of an installation from the state of static completion to full working order meeting the specified requirements. This checklist has been built to make it easier for inspectors to check transformers/motors, direct current (DC) battery system, and the operation and testing tools and equipment and perform efficient lightning protection system, busbar trunking system, circuitry checks, and more. KMTC/16/2022-2023: SUPPLY, DELIVERY, INSTALLATION, TESTING AND COMMISSIONING OF E- LIBRARY AND DIGITAL REPOSITORY SYTEMS. Click to reveal The protection settings should be at the circuit breakers minimum protection level. Ensure the joints are in level using spirit level. BUSBAR. 1 0 obj Our unique, flexible and collaborative approach has been successfully proven over many years on some of the largest data centre and commercial office projects in Europe. REB611 is used in high-impedance-based applications within utility substations and industrial power systems. %PDF-1.5 Conduct a continuity check on all phases/ground and neutral with a multi meter to ensure the bus way conductors are continuous throughout the length of the run. HWk0Gi,aYR4]qCd(cPs:N;URIrAKReEvOOa8:N s.@pF Storm can assist our customers by verifying bus bar performance in small batch, individual designs before submitting a larger batch to UL testing, thus reducing cost risk. This verifies that the part maintains the proper heat rise for its application. A double headed torque indicating bolt is provided to ensure that proper installation torque is achieved. Bus duct will be tested end to end with the readings taken atLV room. Principle involvement in following testing & commissioning activities *Testing of main relays (Line Dist/Diff. WIR for testing all the cables connected to the BUSWAY RISER is approved. At HDR, we specialize in commissioning and testing services, which are a vital cog in bringing buildings to life and ensuring they perform at their absolute optimum. Deployment of a competent personnel for the task. Today we will know step by step how to perform Busway Testing & Commissioning on-Site from A to Z. Are any joint packs installed along the slab. This is the testing of busbar protection. Each Busbar piece has been Meggered before Installation? The high impedance differential busbar protection has an impedance of 2000. All covers shall be properly replaced upon completion of torquing of each joint. Provisioning appropriate PPEs based on the nature of the works. Index TermsBusbar protection, busbar testing, digital substation, IEC 61850-9-2LE, process bus, simulation bit and test mode. 1.3 QUALITYASSURANCE A. |LEfz8CeX?3]>t"Kzfz:KzZ!99CiP^d^|y}YNoWAuSgU6)$'~Q1%yP;$W@z8z(Ugf NPKe#f DsLQdDkd,J2~GamG5jbmn.8&#bd'Jo`,b"L1rIeP(9m^[}s Electricalengineering123.com. Important: Ensure equipment is disconnected from any possible source of electrical supply; disconnect I draw out ACB I MCCB feeder; switch off all tap off units, disconnect neutral and earth cables. Following the successful closing off the supply breaker, close the circuit breaker(s) supplying the connected loads (via Tap-offs) one by one. Comprehensive testing of a bus bar protection system during commissioning or factory acceptance tests has always been a quite challenging and exhaustive task. The tests will be carried out Phase to Phase, Phases to Neutral and Phases to Earth and Neutral to earth. Your IP: Reading will vary widely between site due to length of run, humidity etc. Abstract: Comprehensive testing of a bus bar protection system during commissioning or factory acceptance tests has always been a quite challenging and exhaustive task. Please enable cookies on your browser and try again. To verify the physical condition and proper connections of bus bar. Performance & security by Cloudflare. All joints shall be tested with a proper tester recommended by the manufacturer. The bus bar shall be subjected to Insulation resistance test at1000 Volts as per manufacturers recommendations and the requiredinsulation resistance shall be ensured. WIR for installation is cleared from the major items. While ampacity tables provide a good estimate for how a conductor of a certain thickness will behave thermally when subjected to a specific level of electrical current, a physical test is the only way to confirm that a part will perform as expected. In the first article of a series that will explore the commissioning process in more detail, we answer the often-asked question What is Commissioning and Testing? The objective of testing is to provide confidence in the real-world performance of a part design. All removable installation covers are fixed back properly. Note: In order to avoid nuisance in megger readings, remember to open circuit all the controls wiring inside the switchboard where busbar flange is connected. REB611 is a dedicated busbar protection relay designed for phase-segregated short-circuit protection, control, and supervision of single busbars. All Rights Reserved. hb```a``6c`c`} L@YR|pY:]9l7@Ezi1 )aTgdlp[` %i?S I'f18n-okPb#_/ N|2].v,Hy0m*S0 + Shall be able to test various types of relays like distance, differential, busbar, over current etc. Three of the most important tests performed on the busbar are the High Potential or Hipot Test, Partial Discharge Test, and the Insulation resistance test, also known as a Megger Test. Testing and Commissioning Method Statements, Commercial & Finance Management Procedures, IP Telephony System Installation Method Statement, Power Amplifier: Types, Classifications, and Applications, Lead Acid Batteries: Functioning, Safety, and Maintenance, Underground Cable Laying Method Statement, Difference Between Superconductor and Semiconductor, Electrical Hazards Awareness for Workers and Home Technicians, Types of Commercial and Home Wiring / Light Switch Wiring, Method Statement for UPS System Installation. All busbar installed with correct phase sequence and Tap off location as per approved drawing. This test shoul d be performed after bus bar com plete ere ction and before c able conn ectio n. 3.2. . Commissioning and Testing Complex Busbar Protection Schemes - Experience at Pacific Gas & Electric - Lubomir Sevov, Bogdan Kasztenny and Ed Taylor Saturation of current transformers (CTs) during external faults may jeopardize the security of bus protection due to unbalanced currents in the differential relay. For simple bus bars, the ampacity tables are often enough, but parts with more complex geometries or multiple input/output connections, introduce variables that will skew performance from basic estimations. Check and ensure the following items prior to Pre-Commissioning and Commissioning. As a result, endstream endobj startxref The torquing of the bus bar joins shall be carried out using torque wrench as per the values recommended by the manufacturer. 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