Method Statement Title: Testing and Commissioning of LV Switch boards / Panels.

Method Statement Title: Testing and Commissioning of LV Switch boards / Panels.

1.0       Scope

1.1       This method statement details the Testing and Commissioning of LV Switch boards / Panels  according to the specification section 16402.

            Note :  A separate method statement is submitted for installation of L.V. Switch

                        boards / Panels. ( Ref. ETA /MS/E-009 )

2.0       Material

• All the materials shall be as per approved material submittals.

• Size and number of LV Switch boards / Panels shall be as per approved shop drawing and  load schedule.

• Identifications and labels.

3.0       Applicable Location

• L.V. rooms for E1,E2,E3 & W1,W2,W3 Towers Located in Podium areas.

4.0       Instruments.

4.1       Insulation Resistance tester ( Megger ) with Variable Voltage selections.

• Phase Sequence meter.

4.3       Multimeter.

Note : The caliberation certificates of testing instruments shall be verified prior to usage and copies shall be included in the test reports.

• Inspection Procedure :

• Visual, Mechanical and Operational checks as per the format enclosed.

• Test Procedure :

• Insulation Resistance Test  using 500V Megger:

• Check the tightness of connections.
  • Clean all the supporting insulators.
  • Isolate the cables on incoming and outgoing side.
  • Apply a megger voltage of 500Volts DC between Phase ‘R’ to earth for 1 min with Phase ‘Y’,’B’ & ‘N’ shorted and earthed and record the values.
  • Similarly continue the test and record the values for the other phases.

• Operational Checks:

• Connect the required control supply as per the schematic.
  • Check the operation of the switchgear i.e. closing / tripping of switchgear from local and control points.
  • Check the operation of protective relays.
  • Check the operation of interlocks, alarms and indications circuits as per the approved schematic

• Safety :

• Only experienced and skilled personnel shall be engaged for testing.

• Safety guards shall be in place and secured prior to start-up.

• Warning signs and tapes shall be placed during start-up and commissioning as required.

• All safety procedures shall be followed in accordance with the project health and safety plan.

• Safety officer shall check and ensure all safety precautions as followed.

• Records:

• Site Test Reports.

• Caliberation certificates of testing instruments.

9.0       Reference :

• Specification Section 16402.

• Approved Drawings.

10.0     Enclosures : Test Report for LV Switch board.