Arsalan

CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER METHOD STATEMENT FOR MEGGERING OF LT CABLES PROJECT: CONSTRUCTION OF INFRASTRUCTURE FOR PEARL AND REEF TOWER CRESENT BAY KARACHI CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER Table of Contents 1. OBJECTIVE.......................................................................................................................................... 3 2. SCOPE OF WORK .............................................................................................................................. 3 3. REFERENCES ..................................................................................................................................... 3 4. ABBREVIATIONS/DEFINITIONS ........................................................................................................ 4 5. RESPONSIBILITIES ............................................................................................................................ 5 6. EQUIPEMENTS AND MANPOWER RESOURCES ............................................................................ 6 7. SAFETY PRECAUTIONS ..................................................................................................................... 7 8. PROCEDURAL STEPS ....................................................................................................................... 9 8.1 Pre-Testing preparation Megger Testing ............................................................................................... 9 8.2 Electrical Continuity Test Megger Testing............................................................................................. 9 8.3 Short Circuit Test / Insulation Resistance Test for Wires ......................................................................... 9 9 MEGGER TEST REPORT .................................................................................................................. 11 10 RELATED DOCUMENTS ................................................................................................................. 12 CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER 1. OBJECTIVE The Purpose of this method statement is to ensure that the maggering of all LT and General Cables are executed in accordance with the contract and safety requirements. safety precautions are implemented through out the progress of the work. 2. SCOPE OF WORK This method statement shall provide the guidance of measuring the continuity and insulation resistance of LT cables, branch circuit etc. 3. REFERENCES Project specifications • Quality Assurance Plan • Quality Inspection Plan • Project Drawings • Verified Surveys • Construction Drawings • HSE Plan Page • 3 Following documents are considered as reference documents: CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER PROJECT DIRECTOR PM Project Manager CM Construction Manager HSE Health, Safety & Environment I/C In charge IMTE Inspection, Measuring & Test Equipment MS Method Statement PPE Personal Protective Equipment QAP Quality Assurance Plan QA & QC Quality Assurance and Quality Control QIP Quality Inspection Plan Page PD 4 4. ABBREVIATIONS/DEFINITIONS CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER 5. RESPONSIBILITIES • Project Manager PD/PM will be responsible for the initialization of the work, as well as to manage the resources to perform their respective activities in compliance with the quality, schedule and safety requirements of the project. • Construction Manager Construction Manager- is responsible for the overall site operation and works. He shall ensure that the appropriate procedure is followed by all the involved personnel taking into consideration that all relevant shop drawings, reference drawing, statutory bench marks, reference points and methodologies are correctly utilized. • Site Engineer Site Engineer will ensure that the installation of Earthing activities are conducted according to this method statement, latest project drawings & specifications. • Survey Engineer Survey Engineer of Respective Components will ensure that Earthing points during the installation at site are as per IFC drawings. • QA & QC Engineer QA&QC Engineer/inspector will assure that all the relevant work is carried out in conformance with project specification, QAP and QIP. In case of any nonconformance, it will be controlled through corrective action request (CAR). • HSE Engineer HSE team will assure the implementation of HSE plan. Store Keeper 5 The Store Keeper is responsible for all warehouse operations activities receiving the materials, tools and equipment’s used in this activity and maintaining the records Page • CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER 6. EQUIPEMENTS AND MANPOWER RESOURCES The following equipment’s shall be deployed at site as per required numbers • Manpower Resources. Site Engineer, Supervisors, Electrician, Helpers S.NO EQUIPMENTS AND TOOLS DESCRIPTION 1 Kyoritsu 3005A Digital Insulation and continuity Tester (Magger) 2 Wireless phones for distance communication 3 Knife 4 Cable Trailer/ Jack to hold the cable drum 5 Cable cutter 6 Insulated Plier 6 Equipment’s Page • CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER 7. SAFETY PRECAUTIONS • Block out disconnect switches • Remember that when working around high voltage equipment there is always a possibility of voltages being induced in apparatus under test or lines to which it is connected, because of proximity to energized high voltage equipment. Therefore, rather than removing a workmen’s ground in order to make a test, it is more advisable to disconnect the apparatus, such as a transformer or circuit breaker, from the exposed bus or line, leaving the latter grounded. • If neutral or other ground connections have to be disconnected, make sure they are not carrying current at the time, and that when disconnected no other equipment will lack necessary protection. • Pay particular attention to conductors that lead away from the circuit being tested and make sure they have been properly disconnected from any source of voltage. • Observe the voltage rating of the Megger instrument and regard it with appropriate caution. Large electrical equipment and cables usually have sufficient capacitance to store up a dangerous amount of energy from the test current. Make sure this capacitance is discharged after the test and before handling the test leads. • So far as is known, there is no fire hazard in the normal use of a Megger insulation tester. however, a hazard when testing equipment located in inflammable or explosive atmospheres. • Prior to commencing any activity, the work force will receive a Toolbox talk on the Project site safety regulations by the foreman and HSE officer • Following a test when capacitance is discharge • All the hazards and corresponding safety precautions in the respective risk assessment shall Risk assessment training to be conducted including all involved persons and maintain records. Page • 7 be adhered to and communicated to the workers before starting work. CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER • Appropriate Personnel protective equipment’s like gloves, goggles, should be worn apart from safety shoes and helmets which are mandatory. • Ensure Permit to work (PTW) shall be obtained if necessary and it shall be displayed at the location. • Ensure the third-party certification of equipment’s, operators and banks man are available. • Follow all the legal requirements and implemented as per the standards & contract Page 8 agreement. CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER 8. PROCEDURAL STEPS • Megger instrument shall be having valid calibration • Megger with range 500V/1000V shall be used for conducting the test • Megger range 500 V shall be used for wire testing • Megger range 1000V shall be used for cable testing 8.1 Pre-Testing preparation Megger Testing • The leads used for connecting megger testing with thecircuit should be fault free and the two connecting leads should have electrical continuity.It is checked by touching the free ends of the leads together while the megger button is pressed ON to check for zero resistance • Check for PVC adopters are provided for cables and male adapter for all PVC conduits terminating in the panel board • Check the dressing is complete for all the wires in the panel boards • Confirm all the connections are completed before the testing 8.2 Electrical Continuity Test Megger Testing • Connect the free megger test probes to any two conductors required to be tested • With all the appliance connected or te two ends of the conductors shorted and all switches switched on the reading shown on te megger should be zero.If the reading shows infinity then there is an open circuit. The fault should be traced and rectified • For cables, the extreme ends of any two phase is shorted and when the test is conducted the reading should be zero if the megger reads infinity or some value of mega ohms then there is a fault in the cable and it should be rectified. Same procedure shall be repeated for other 3 conductors of the cable 8.3 Short Circuit Test / Insulation Resistance Test for Wires For wires the circuit is tested, Megger range should be 500V 1) Between Phase and Neutral 2) Between Phase to Earth Page Between N to E with the other ends of the circuit conductor open the value should be infinity for all the test. If the value is zero there is short circuit or the insulation of the wire is damaged and the wire is changed accordingly 9 3) Between Neutral to Earth CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER For cables the Megger range should be 1000V and bot the ends of the cable shall be kept open and the test shall be conducted between phase and neutrals as follows: i. R to Y ii. R to B iii. Y to B iv. R to N v. Y to N vi. B to N Page 10 All these reading should be infinity. If otherwise the cables cores/phases are faulty and should be rectified CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER Page 11 9 MEGGER TEST REPORT CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER Permit to Work • Survey Insulation Resistance Report • Request for MIR (Material Inspection Report) • Request for IR (Inspection report Page • 12 10 RELATED DOCUMENTS CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER Ref No. Rev. No. CHECK SHEET FOR : Meggering of LT Cables Installation Checklist IR No : LOCATION Date : Checked by STAGE ITEM DATE BML Check the Cables properties are verified as per approved drawings Physical Inspection Ensure that cables are not damaged and Megger is working properly Ensure that cable sizes and quality are as per the standards and specification Ensure that all existing services and terminations are defined and exposed Ensure Cable Megegring is proper as per standards Technical Inspection Check Cable is dry Documents IR (Inspection request) Megger Test Reports For HILL INTL For BANU MUKHTAR Name Name Date Date Sign Sign HILL INT CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER Ref No. Rev. No. CHECK SHEET FOR : IR No : MEGGER Material Checklist LOCATION Date : Checked by STAGE ITEM DATE BML Delivered material is as per approved Submittal TECHNICAL Megger should be Calibrated Ensure the calibrated certifcate is valid Material inspection during testing Physical condition of Megger meter Physical Inspection Megger should be conducted in safe and clean place Check the LT Cables Before conducting meggering Material handling as per manufacturer and authorized trainer Final Material Inspection request (MIR) Documents Supporting Documents if required to attach. Megger Test reports For BANU MUKHTAR For HILL INTL Name Name Date Date Sign Sign HILL INT INSPECTION & TEST PLAN REF. NO : REV NO. : DATE : PAGE : 1 CONSTRUCTION OF INFRASTRUCTURE OF PEARL AND REEF TOWER ACTIVITY: Meggering of LT Cables/General wiring AREA: ITP Approved by HILL INTL. ITP Approved by BANU MUKHTAR (PVT) Signature Signature Date Date Sr No. DESCRIPTION FREQUENCY INSPECTION LEVEL SPECIFICATION/ CRITERIA BML HILL INTL. H R Document Approvals MAR (Material Approval request) 1 MS VERIFICATION RECORDS Approved MAR (Method Statement) Prior to Start of Work Shop Drawings Approved Shop Drawigs Permits 2 Cable Inspection 3 Meggering of LT Cable Termination Inspection LEGEND : H - HOLD FOR INSPECTION W- WITNESS INSPECTION Prior to Start Cable Laying As per Approved Drawings and Specification W W ITR Approved Shop Dwg After completion of all DB's panel installation As per Approved Drawings and Specification W W ITR Approved Shop Dwg S- SURVEILLANCE INSPECTION R- REVIEW HL- HOLD BY LAB ONLY MAIN CONTRACTOR MAIN CONTRACTOR APPROVAL COMPANY APPROVAL Name Name Sign Sign Date Date